Review of the Effect of Blast initiation Delay Timing on Blasting fragmentation

Review of the Effect of Blast initiation Delay Timing on Blasting fragmentation

By Taiwo Blessing Olamide 

GIANT MINER

INTRODUCTION

 Do you know that;

Explosive energy is higher when the shock energy supply for the initiation is high and accurate.

Also that, most mining operations uses inaccurate blast time and initiation timing. Two things affect Blasting efficiency appart from the blast parameters and rock properties.

 These are;

1. the initiation system and

2. the initiation approach. 

This article give a brief review on Professor Takis Katsabanis and Nikolaos Gkikizas-Lamptopoupos work.

Professor Takis is an explosive Engineer, lecturer in Queen's university Ontario, Canada.

Prof Takis of Queen's university Canada with one of His master's student Nicholaos Gkikizas worked on a project relating to this in 2016. The Thesis focus on examination of the effect of Time delay on fragmentation.

 The project was effectively experiments in the university Rock Excavation Laboratory under the full supervision of Prof. Takis Katsabanis. 

 The work involved two series of experiments.

First series involved tests on small scale grout and granite blocks to determine the moment of burden detachment. The instrument use for these experiments consist but not limited to strain gauge and Piezoelectric sensors, high speed camera. The result of the first series experiment shows that the time of rock particle detachment for the thesis set up is between 300 and 600 micro second. Meaning, as the Explosive shock wave fractures the rock and the gas energy perf

The major aim of blasting is to detach the rock into handable sizes, the important of studying the detachment time as indicated by Prof. Takis student was to ensure that the burden movement timing is accurately design between inter row and intra row drill holes. Each detachment time affect the fragmentation efficiency of the blasting. The major approach adopted in the thesis was to optimize the charge timing and get the detachment time right for efficient fragmentation.

The second series of the project involved blasting of a 2m high granite bench and it's purpose was to determine the hole to hole delay that will provide optimum fragmentation. Nicholaos Gkikizas worked reflect on this objective by adopting image analysis software for fragmentation efficiency examine for each delay observed. Also, he examine the produce vibration from the blast and also record the blast with high speed cameras such as Olympic i-SPEED 2 camera.

The result of the second series suggest that fragmentation was optimum when delays between 4-6 Ms were used for the experiment set up. It was also found that the moment at which gases first appear to be venting from the face was consistently around 6ms after detonation. In one of my blog article had take time to explain the concept of shock energy and gas energy release sequence during detonation. Nikolaos in his thesis indicated that the timing difference between the initiation period and gas explosion period was 6ms, this shows that from the initiation point to 5:59ms, the fracturing process was fully taking place. The crushing zone process, the tensile slabing process and the shearing.

The Research work of Prof. Takis Katsabanis student also shows that the mean fragmentation size changes with time delay. The experiment shows that the fragmentation mean size was higher at low delay timing and higher at timing greater than 8ms. Which shows that from 2ms to 8ms, the X50 is low with 8ms been the optimum delay second.

Nikolaos work also revealed that the delay timing affects the vibration level for the experiment conducted. Ground vibration is one of the most serious blast illness after flyrock. The energy distribution from explosive result into displacement of rock and earth crust material at a define frequency level. Such is also depending on the Maximum instantaneous charge per initiation. Prof. Takis student also shows that the shorter the delay timing the higher the possibility for overlaps (constructive wave interference) 6-8ms delay produces separation of pulses as indicated by the result from the vibration results.

Conclusion

This work had shown that the efficiency of blast production and safety also depends on the charge initiation and the timing allocation.

The productiveness of blasting Operation is the main aim and Target of blasting. Ensuring safety and profitability is also a great task. 

To ensure this is fulfil, there is a need for proper design and optimization of blast timing and design to achieve this great task.

Mining and safety is our main focus

Giant Miner is committed to safe mining and campaign against poor and unsafe mining. First in Nigeria and then to the whole world.

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Reference

Read full Thesis

https://qspace.library.queensu.ca/handle/1974/15321

Mining and Blasting operation: Learn Mining Operation 1

1. INTRODUCTION

Blasting operation is one of the mine operation begin communition process. It is define as the process of using energy generated through explosive detonation for rock mass fragmentation. In a simple definition, I explain mining engineering to be a profession that provide needed mineral resources through application of safe technology. Mining related with the earth crust in a safe approach to release the naturally deposited mineral resources for human use. Mining Field surely make sense and can't be look down on because of the need for Innovation and technological development in manufacturing companies. The world currently have enough space ships, aircraft, cars, motorcycles and many heavy equipment that demands high supply of metals and fuel minerals. Currently, we consumed more salt, uses more cement produce from limestone, clay, iron ore, gypsum, human being keep constructing more roads with asphalt produced from the mixture of bitumen and granite dust. Infact, more quest to diversify energy source from electricity to solar energy had keep the need for glass sand and other light metals demand high. Mining is one of the field that supports the growth and development of any Nation. Not just to supply raw materials but also add value to the National economy. This article focus on providing ground explanation about Blasting operation productivity and safety. This content mentioned several materials use for blasting; why blasting can be dangerous and what makes blasting beautiful and safe. The main aim of this article is to provide individual with information to get the know more about the advantage of mining and also teach the reader one of the way by which we mining engineer go about liberating the mineral from the earth crust.

2. Explosive and Blasting operation

Firstly, I will like to give a simple definition of blasting to be the use of industrial explosive in an industrial way for rock fragmentation.  Explosive by definition according to Dick and Fetcher is any chemical compound capable of undergoing rapid or violent detonation under the influence of a stimuli or impulse such as heat, lightening, fire, impact, friction or shock. And upon such detonation it releases energetic gas and wave sufficient in magnitude to explode/destroy any form of obstacles barricading it pathway. The Mineral as refer to in mining and geology field is an accumulation of element coming to form a solid substance that is crystalline and has a define chemical composition e.g Gold, mica, calcite. This minerals existing in various form and their chemical composition makes the difference between the various available categories. Each equipment, tool, materials existing on Earth is known to be a product of mineral or agricultural product. These minerals are formed through the cooling process of emolten magma during igneous rock origination. These minerals are distribute within rock mass In different quantity (assay), the amount of each Mineral in a rock mass define the function and usefulness of the rock itself. 

2.1 Duty of a mining Engineer

The duty of mining Engineer is to make design for the extraction of this minerals (ore deposit) from the earth crust. Mining life cycles define the stages of mining operation, it begining from Prospecting to exploration, then to exploitation, and finally to reclamation. Each of this stages depends on o e another. The main stage where the extraction work begin is known as the Exploitation stage. This stage begins after all the deposit overburden had been strip and all needed equipment have deployed to the mine. Exploitation stage in mining consist of development, drilling, blasting, loading, and haulage process.

The stage initiate the extraction process of mineral from the earth crust through the use of different equipment and machineries. As mentioned by Tiile, 2016, mining is a capital intensive operation due to the required operation cost to develop the deposit, extract the deposit and transport the mineral run-off-mine from mine-to-mill. Study hhas also revealed that blasting operation account for about 10-15% of the total cost of mining operation due to the need to provide drill holes at define design on the rock bearing Mineral, provide explosive and explosive  and Blasting accessories materials. 

This article is therefore important for both blasting professional and upcoming mining and civil engineers in order to provide them with basic knowledge about blasting influence on mining productivity and also sensitize them on the need to get blasting right.

3. Blasting factors and design control

The need to fragment rock mass and get the insitu rock broken into smaller sizers had always been the reason for blasting since the beginning of Mining. Scholars work on Blasting had proved that blasting operation is controlled by two basic factors, these factors are identified to be the controllable and the uncontrollable optimization of blasting is important to control mine downstream operation and reduce dilution rate from the site. Getting ride of both external and internal dilution in Mineral operation is important and needs special attention. Not only to reduce transportation cost but also to minimize the total ore dressing cost.

Blasting design involve taking the right decision about the controllable factors to ensure good utilization of Explosive energy for rock fracturing. The controllable factors include but not limited to burden, spacing, hole diameter, hole length, charging length, powder factor among others. These factors are adjustable from the blasters end to ensure explosive quantity is optimize for blast per ton. 

Most research work towards the effect of burden and spacing on blasting efficiency had proven high impact due to the fact that this parameters not only control the energy utilization and efficiency during blasting, but also determine the Explosive energy distribution within the rock mass grain. When burden is increased, the load on explosive per ton increases and this will definitely result in poor fragmentation and possibly tangential vertical flyrock projection.

Most blasting operation performed by ASM consider nothing about the design and striking balance between the controllable factors and uncontrollable factors. The only focus had always been to get the ore by all means. Making money is not all to Mining, mining profession is to mine for life sustainability and not destructiveness.

4. What Small scale mining Companies need to Do to improve their blasting operation

The small scale miners are refer to as those who extract Mineral deposit with local tools and basically at small scale level. 

This mining sector tends to go after placer deposit, unconsolidated Mineral bearing formation using local tools and small Operation machines. Some of the mining methods used by ASM includes, placer mining, leaching, quarrying, looting, panning to mention few.

As small scale miners, this group of people also perform blasting with ANFO, dynogel and many other emulsion explosive products.

To improve ASM blasting operation the following needs to be put in place by the management,

1. Appoint a professional and experience mining Engineer to see to the mining operation supervision

2. Provide a good operation plan for the mine

3. Provide a blasting team head by a good experience blaster/Explosive Engineer

4. Provide good training and handbook for all the blast team members

5. Have a selected day, time for blasting in your mine. The selected time and day must be well known to all mine workers

6. Refrain from illegal buying, storage and transport of explosive

7. Training all blasting team about interpretation and implementation of blast plan

8. Provide an active blasting supervisor who sees to the affairs of the blasting team members

9. Provide a good communication Iink between the blasting team and the management

10. Do not dictate or try to deviate from provided blasting plan materials requirements basically for profit margin

11. Device a means for pre-design of all blast before site operation

12. Provide safety team and after blast checking team (2-5 skillful individuals)

13. Create awareness to all workers about Blasting days and signs

14. Management should be sensitive and active to blasting team need

15. Provide all needed PPE

16. Provide blasting do and donts as a list 

17. Define safety zone or blasting muster point I'm the mine usually at some kilometers from the blasting zone

18. Check all explosive before using

19. Return all unused explosive accessories to the magazine, do not keep in the ware house or take it home   (Big danger).

20. Stop transporting explosive with bike and putting detonator with the Explosive when trainspotting. STOP!!!

21. And many more

Conclusion

Mining is mining when is done with safety first. Blasting without safety first is a bomb blast which is incongruous to the environment. 

All our Targets must be to improve the environment handed over to us and not to damage it.

NIGERIA as a whole, African miners and mining engineer all over the world should give full attention to ASM Operations and help them in various ways such as in design and professional advice.

If ASM failed fly, Large scale mining will not survive, not the world will recover from various lost of insufficient raw materials.

Blasting is for peace and not for war

Explosive is not kolanut or sweet, stop hiding it in your room and store house, take it to the magazine.

Long live Mining

GIANT MINER

EXPLOSIVE USAGE OPTIMIZATION USING AIR BAG

Brief on Blasting Design

Blasting operation is one of the most important operation, looking from the capital influence on operation cost, the important of Blasting result on downstream operations and the place of safety. Most mine and quarries are not sensitive enough to understand the principle of Blasting operation and it significant in mine profit margin, because all Blasting is Blasting to them provided the ore ore industrial rock mass is broken down.

Some of the blast design by operators in common quarries around Africa and others continent where small scale miners and Artisanal miners dominate are extremely poor and give low Explosive Energy ultilization.

It has been proved by many research that poor blast Design with lack of agreement between the blast parameters like burden, spacing, stemming length, subdrill among others will definitely produce poor fragmentation with high environmental illness such as ground vibration, airblast, noise, flyrock among others.

Giant Africa mines expecially Nigeria mines like Dangote, BUA, Freedom Quarries, Fanalou Quarries, Geo-works Quarries, Stoneworks Quarries among others are making great different compare to other local Quarries handled by ASM. This Giant mines have great mine plans and design that help them in striking balance between the hypertensive parameters.

But nevertheless, most of them still under use Explosive energy and still haven't balance the variance effect between the controllable factors (burden, spacing,hole diameter, Stemming, e.t.c) and the uncontrollable factors (rock strength, discontinuity nature of rock mass, chemical property of rock among others).

Blasting operation is capital intensive as I had earlier explained in one of my published write up, the Effect of poor Blasting is not restricted to just loading and transportation but also stretch wings to downstream operations like crushing, grinding and Separation because libration begins from Blasting as Explosive energy not only break rock but also weaken the intermolecular bonds in rock grains.

Previous years ago I meant one of the giant blasterman in Akoko Edo local government of Edo state Nigeria, I was quest to ask him why using ANFO as the column charge and the reason for using it in abundant?

He replied as with this that, ANFO is a strength breaker Explosive, thou it is a low Explosive or better still Blasting agent, it assist and sustain High Explosive energy within the rock mass and ensure it saturate and weaken rock strength. This will reduce work on the processing machine by aiding easy comminution process.

Why air decking is likely going to yeild result that Stemming material decking!!!

Many never sieze from asking me this question concerning the reason why I think air decking will give better Blasting than solid material decking.

Talking about decking in Blasting operation we refer to the situation where innert material is place within explosive charge to reduce charge delay and also produce diversifer stand for the explosive wave.

At the point of detonation, explosive charge initiate generate fast waves which travels at a speed greater than the speed of sound in more than Seven times (>2100m/s), the wave energy perform the Major function of microfracturing (Slabbing). At the point of initiation, the waves are released to complete propagation after getting to the free face. The use of air decking (air bag) definitely provides closer free face medium for the shock waves which makes it reflects back quickly to support the lateral waves after longitudinal wave collision. In other words, the resulting wave generate from the air bag after collision support the rate of fracturing beyond the crushing zone. This support increase in fragmentation and proper breakage of the rock mass.

It also help to provide higher confining which gives the charge more avenue to release more explosion gas for casting and fragmenting.

In conclusion, Air bag help in the reduction of explosive charge weight per blast, reduce the maximum instantaneous charge per delay which directly minimize the blasting operation cost.

It also support good fragmentation; this advantage is important since theain aim of blasting is to get sufficient Run-off-mine at low cost for profitable production.

Also, good fragmentation assist in the minimizing of dilution and challenge of unexpected increase in transportation cost from mime2mill.

Finally, safety has always been the watch word and first thing on the dial of mining industry. It is of no doubt that blasting is one of the most dangerous operation in mining operation cycle due to the high energy involved. Such energy as that release form explosive can be destructive if not safely utilize and can be devastating if poor use. The use of Air bag is one of the cheapest way to ensure the safe and profitable use of explosive.

Remember, Mining the ore safe is better than mining it profitably when the mining act and condition is unsafe. Ensure bis safe and profitable to avoid any for of accident which is the end product of hazard. Eradicating principal hazard to avoid principal threatening condition works like magic for those mining industries that put all mining safe and profitable strategy in place.

Maje safety first.

Thanks and Happy mining

ASM Needs help with safety

Blow out and flyrock is one of the evidence of poor and unprofessional blasting operation.

This can result from poor steaming and overloading of holes and sometimes result from low charge weight.

Energy is define as the ability to get the job done, the capacity to overcome the energy barrier.

There are many ways to generate energy but for rock breaking, the use of explosive had been the most adopted means since 1900s. In every proper work done, professionalism is very important. Lack of professionalism result into disaster and accident. Since the aim of mining is to promote safety first through new innovation, inventories and safety management system, then the call for help to ensure this is achieve in Artisanal and small scale mines is important.

Fact

The artisanal miners will keep existing in the stope of mining operation as they has always be because if the following reasons:

1. challenge of start up capital in developing countries to set up large scale mine

2. large scale mines will for sure always go for huge deposit, neglecting placer/alluvial deposit with low grade and non uniformly distributed. #mining 

Artisanal miners need assistance and help to ensure all operations are safely carried out.

Reason for urgent response

The approach adopted by the low income Miner to extract alluvial formation tends to affects the environment, damage water, land and even air through pollution and acid mine drainage.

Aside from this hazardous effect, small scale mining operations working with insitu hard and soft rock sometimes engage in drilling and blasting operation.

This operation in most ASM mines are performed with less consideration to safety. Getting the explosive charge quantity that will break the rock down safely without any environmental effect becomes important. likewise understanding the behavior of this explosive generated shock and gas energy also contribute to ensuring the Earth crust condition after blast remain stable and safe for human existence.

Th question now arise that who will sensitize the ASM and other quarry workers about the safe design and execution of blasting in Most Africa and less developed country.

Explosive is for peace and not war

Let get the across to the ASM operators about the best and safe usage and handling of explosive but during transportation, storage and usage.

the mission is to go for safety first!

As all the mining worker must return back home to enjoy nice dinner with their family.

blasting aim to support innovation, development, and human existence beautification.

mine the ore safely

get the ore peacefully

support peaceful and safe mining

#campaign_Against_unsafe_Blasting

 #environment #safety #drilling #africa #innovation 

Blast it safe to safe your world

Brief Summary

We must be alive to get all the money we are dreaming and thinking about! Mining still remains the most lucrative business in the world with high impact on Technology Development.

But the level of safety at the blasting operation cycle is minimal due to lack of sensitivity despite millions of Research work on this area.

This article was put together By Taiwo Blessing Olamide to sensitize the World mining sectors on the need to get involved in small scale mining to avoid unforeseen disaster.

What blasting may look like if picture from a perspective

Check below picture to have a view of what blasting is and what quantum physic can be involved in getting the rock fragmented

instantanous casting of fragments from overloaded blasting

Article

Looking are many developed countries it becomes clearer that they are all functioning well in their large scale mines. Likewise the developing countries, they tends to have some level of success in the record of medium scale mining operations.

Taking a look at the small scale mining operations as a case study Nigeria and other Africa countries, most mining operations in artisanal and small mines are poorly monitored and design. Professional Mining engineers are kind of Given up on the local miner, instead of any form of assistance they set their compass on the direction where large mining thrives. Less attention has given to help, improve and monitored small mining operations because the large scale miners have all Earth equipment to get their mine cleaned and discretely planned.

This become my view and concern! That, though the small scale mining operators are abundoned but with time the large scale mines will soon fold up, reach the ultimate limit and come back to the small scale sites. In addition, the small scale miners might later cause damage to the Earth and bring aftereffect implication on the large scale mines and human existence at large.

Small mining firms are known for less safety concerns, less safety management and supervision.

looking from the direction of Blasting, small scale miners are not much concern about the effect of flyrock and it's causes, better worth how to minimize it.

They are less concerned about the effect of timing on blast fragmentation (Appreciating Professor Takis findings at Queen's University). This sectors are less aware about the aftermath effect of generated shock waves from excessive powder factor, how it can over break the wall, damage the unmined rock mass and reduce the stability of the mine slope completely.

Though we have our own mine safe and try not to show concern for the poor miner, neither do we have any plan to train, sensitize them on what they don't know. Before we try to mine for our own profit and mine development alone is time to begin a sustainable mining that check out others operation to avoid the future damage which is possible of affecting our mother Earth.

The ground itself has a stable stress field before the disturbance team called miner came, the induce stress resulting from excavation is capable of shifting all stress equilibrium into stress instability if proper control is not put in place. Each tectonic plate has it own respond to all the generated dynamic waves. But a time shall come when the plate will no longer be accommodative, then what can be done?

prevention is better than cure!

say no to poor blasting

support through mentorship, surveillance and supervision all blasting

manager must now be concern about the report of all blasting, not just how much tonnage do we get but how safe was the blast.

safety first

Campaign Slang:

Before Fire in the Hole, Safety must be assured

Mine is safe

Blast it safe

Check!! Check!! And recheck before putting fire

The beauty of a Good blasting is safety: Go for safety to safe the world

        Sir Dyno Nobel

Why Blasting?

The rock Mass contain the ore mineral which is the mining engineer major target. Mineral resources are inevitable material needed for Technological innovation and national development. The place of this mineral resources can not be suschanged neither can it be replaced with synthetic materials.

By definition, I describe mineral as solid inorganic naturally occurring matter, that is been generated during magma eruption through sufficient time cooling and interrelate and exchange of element in the liquified rock lava.

The mining engineer as well known by other disciplines involve themselves in getting the ore from the Earth crust and refining it to fit end user's need.

The extraction process begin from altering the Earth land form through wide range of excavation and degredation attempt to get the so called overburden material removed in order to gain access to the enriched ore vein.

Emphasis on Bowen series reaction*: During formation of mineral, the cooling time tenders to affect the location of each precious mineral, some tend to form at deep depth due to the slow rate of cooling. Slow cooling support fast  and bigger growth of mineral size. The bigger the mineral accommodation, the higher the economic value. This condition makes the ore deposit locate in strategic position where need arise for size reduction to ensure the valuable minerals are easily separated.

Ore is an accumulation of valuable mineral existing in an economic quantity. This ore is what the Mining engineers want and it existence can only be found in rock Mass. In addition, the ore block do not exist alone as an entity but usually bond with the parent rock which can be igneous, sedimentary or metamorphic rock.

The host rock may exist as outcrop or deep depth rock Mass which becomes impossible to move directly to the processing plant for libration and separation process.The quest bring about ways to reduce the rock mass and free the ore block for further ore dressing. Transportation of run-off-mine is capital expensive and also the mine-to-mill operation cost is high!

Innovation attempt in the 1900s to begin the use of black powder aim to assist and improve mining operations.

This improvement covers the production and cost minimisation.

Likewise the 1960s Innovation of detonation cords and cap by the Dyno Nobel group assist the safety and effective use of the energetic material.

Blasting Is important but must be safely carry out to ensure the reason for blasting is not been blasted.

Let your manager be aware!!!!

Campaign against unsafe Blasting

Say no to poor and unsafe blasting operation.

Both civil works and mining operations required blasting activities to get the rock Mass size reduced or get the obstructing rock casted out from the road map.

Using explosive in a bit to generate the needed energy can be highly dangerous if not properly handled 

Many quarries had begin blasting long year ago without any plan, without any post blast check, without any preblast planing. Fire work is not good when out of hand and this can happen when excessive powder factor is use or there is existence of misfire due to unforeseen circumstances.

Blasting is much more dangerous and must be done safely.

This campaign is to sensitize all quarry owner, manger and mining engineer on the need to put proper consideration on proper and safe blasting.

Advice to mining industry:Things to enhance your blast safety

1.Get the blast design right

2. Conduct your preblast checking and take note of various structural features that needs design attention

3. Identify any hole with fractures and note any existing dyke and sills as intrusion

4. Supervise the handling and transportation of all explosive material from magazine to site and from site back to the magazine

5. Monitor all explosive usage and ensure due procedure is follow during charging and chaining to avoid unnecessary fire cut, misfire and other arising issue with blast impulse distribution.

6. Provide good policy for you blasting team and monitor all unsafe act and conditions with instant action

7. Give all blasting operation special team for emergency response and safety team.

8. Ensure all clear surveillance is made available and active for all blast operation.

Let make blasting a good blasting and not a Killing or ground damaging blasting.

We want the ore for the people, then we must not create dead trap for the people through landslide, wall fall and holing due to over break during blasting.

The explosive energy is for peace and not for war

#campaign_against_unsafe_blasting

#GiantMiner

Campaign Against Unsafe Blasting: Management responsibility (1)

#campaign_against_unsafeBlast

Brief Introduction

It's clear that unsafe blasting is the father of unwanted occurrences. This make all move in the wrong time give birth to the wrong event. All mining operations must be planned properly before in site action.

A look at explosive energy

 Explosive energy distribution is almost a stochastic  discrete event, the explosion and detonation energy can sometimes be unfamiliar if there is change in rock property stimulation and expectation. Let all blasting put needed factor of safety in place to account for unexpected entities. Rock Mass as a discountinous, heterogeneous, anisotropic and non elastic material host the ore, the unmine rock form the supporting body; damaging the supporting rock is a call to hazardous events. The energy generator is the explosive, but the explosive will always remain calm until the stimulating wave is in touch with it. As mining engineer in this new year, let all our relationship with explosive but in usage, storage and transportation give positive result.

THINGS TO DO

 Balance the rock properties with the explosive energy and make proper adjustment to the controllable parameters in order to ensure all intrinsic conditions had been handled. The blasting result greatly affect the mine management plans, it control the downstream operations and alter the productivity rate.

Both safety and profit must be considered when we are planning our blasting. The high powder factor affect mine cost per ton, and also produces unsafe conditions like, ground vibration, flyrock, over break, backbreak, ore grade dilution, noise, dust pollution to mention few. This year operation in the mine must be different completely.

 Generally, both Artisian and small scale miners (ASM) and Large scale miners (LSM) must put the safety of equipment, personnel and mother Earth into consideration.

 Giant miner advice to mine managers:

Dear mine manager, 

I understood all managers concern about profit and your interest in high production rate so as to meet up with the customer's demand. I am aware that all managers make use of all available managerial and leadership's skill and controlling techniques to ensure the mine operation cost is minimized. In fact, managers have decided to become the blasting engineer in other to reduce all blasting materials, supervise the loading and silent the professional mining because he will always say "This is not safe sir!". As good as profit, profit without safety is fraudulent.

Truly the wall has never fail since, despite the use of unquantifiable explosive charge. In fact, the bench wall is full of multiple joint sets and fracture but yet the mine is still producing. As fine as the state of your mine now because you are producing, do you know the mine slope will definitely fail one day!

 That the wall is standing does not assure the wall is stable!.

 Please, let not the management decision side line the place of safety. The profit is good, but please let the safety be first. 

The wall is dieing, the failure conditions might not be completely met, but you can imagine the wall standing and suddenly little vibration collapse all and cover the mine.

To support our campaign against unsafe blasting, all mine managers must ensure the management decision and blast proposal/design be thoroughly review and approval be granted base on safety first. All mine operators who consider anyone able to supervise to be more effective and efficient than competent Mining engineer is totally wrong! 

Mining engineer is needed to ensure the decision made about the blasting is right for the deposit at every Time. I know the company needs low paid employee but putting mining engineer aside to get electrical engineer or builder as mine manager is inppropriate. The rock behavior is not like current and voltage any way, rock is not cable but a DIANE material

Rock don't obey Kirchoff law at all, not all the release energy entrying a rock Mass node will get out at the same intensity, the heterogeneity of rock call for rock doctor who can diagnostically prescribe the right charge for the right explosion. 

Please dear management, give room for professional mining engineers to carry out there jobs. The mine is build base on plan, do your mine have any plan? The blasting conditions is check to prepare for the future events, do you have any post and preblast checking team?

No, we don't is probably the answer for more than 70% mine in Nigeria, maybe 50% for mines in other Africa countries.

What blasting team do you have? Do you call people who distribute explosive the blasting engineers? I bet you, those team  doesn't even understanding when the Earth is bleeding, when the fragmentation is good or poor, when their is misfire; that is not what Council that regulate engineering activities called Engineering team. Those are event oriented Team who don't show any concern about the aftermath effect. The real Team prepare a good design, implement and supervise the execution of the plan and also check the results from the plan to ensure good recommendation is drawn from it. Good blasting team also ensure all the mine is safe before, during and after blasting.

This is a call back to the real mining, when you fail to plan the mine, the mine will definitely experience premature closure. Let all manager reorganize their company policy, Safety management system and working structure.

The mine Team should be working with a clear blue print, not just work with the idea of getting the ore out by all means; whether safe or unsafe.

Decide to put safety first in year 2022!!!!

Fire in the Hole, charge in the rock, energy and waves within rock grains.

Happy mining

Say no to poor use of explosive

Say no to unwanted blasting event

Use explosive for peace and not for war

Let us mine the Earth safely

Thanks

Appreciate from Taiwo Blessing Olamide (Giant miner) goes to all mining engineers who ensure and see to the proper implementation of mining laws and regulations.

Let us mine the mine and not dig the ground.

Thanks to USA, CANADA, AUSTRALIA, SOUTH AFRICA mining engineers. I salute your great work and practising.

Give zero tolerance for unsafe act and unsafe conditions.