GIANT MINER

MISFIRE DEFINITION  An explosive charge in a drill hole that has partly or completely failed to explode as planned. Causes include unskilled charging; defective explosive, detonator, or fuse; broken electric circuit or--most dangerous--cutting off of part or all of the charge through lateral rock movement as other holes in the vicinity are fired. Stringent safety precautions cover procedure in minimizing these risks and in dealing with known or suspected misfires. A smoldering fuse may delay explosion, causing a hangfire, so return to workings after a suspected failure is necessary. Another main cause of accident is drilling into or dangerously near a socket--an apparently empty drill hole. Rules for misfires ( MMMR-2002) A.When a misfire occurs in a mine, indicated by the counting of exploded shots in case of fuse blasting, or observed by the blaster from other indications in case of electrical or detonating cord blasting, no person shall enter the place of blasting un...

Drilling is the creation of Artificial cavity into rock for the placement of Explosive. Drilling can be done for different purpose ranging from: 1. Rock Blasting 2. Oil and gas production 3.rock stability and Safety purpose 4. Exploration purpose  5. Water and borehole drilling 6. Among others. Drilling for rock Blasting is done for the loading of Explosive into the rock formation so as to generate the shock and gas energy require to fragment the rock mass. Planning for an event makes the event or operation more perfect and productive. The condition of the drill holes and arrangements in place of pattern design of the hole drilled for Blasting has great impact on the effectiveness of the blasting. Some of the parameters that explains the status of blast holes are: 1. Burden: the perpendicular distance between the first drill holes row to the nearest free face. Or in others way, the distance between two adjacent  Hole rows.this affect distribution of energy wit...

Marble is a white colour calcitic lime stone. It a stone with  glaring and decorative texture. It has coarse texture with dominantly calcite Mineral. Marble has white streak but varies in colour from pure white, off white, Ash depending on it formation.It color also depends on the following: Primary rock from which it formed, composition, degree of weathering process it has undergone, type of metamorphism it undergone (contact or regional) among others. Marble is a monomineralitic rock.. Marble is a carbonate rock, it has hardness of 3 on mohr's scale of hardness. "Marble More of Formation"  Marble bus formed through metamorphosim process. When Argillaceous grain limestone undergone metamorphosim under high temperature, it undergone recrystallization which led to the formation of Marble. As existing limestone formation is heat up by intrusive magma it grains undergo Reformation.. Marble is an industrial  rock as it a useful industrial material. Marble as one o...

Open pit mining is one of the surface mining method use in exploiting less overburden material. Open pit method is one of the special mining method use to extract competent ore with flat shape. This method is unique with it's step wise approach use to mine the deposit in benches. The safety requirements for the success of this type of mine is not restricted to  Open pit blasting at first may require box cut approach to create additional free face at the horizontal direction for successful throw. Mostly if the blasting is carried out at the last bench floor or as the first blasting for face opening. In such case where: 1. Environmental Impact has to be controlled, 2. Safety of workers, equipment and nearby things have to be presented, 3. Blast economy in place of cost of blasting material effect on overall blasting cost have to be minimize, 4. Success optimum fragmentation size with less than 5% oversize and undersize, and 5. Dilution, overbreak and back break needs to b...