Open pit mining

Open pit mining is a technique of open pit mining extraction of rock or minerals from the earth by their removal from an open pit sky.

This form differs from mining methods requiring a tunnel or underground mining. Open pit mines are used when deposits of minerals are found near the surface. On the surface we can find sand, gravel, water ultimately any surface to reach the ore.

Open pit mining restoration

The open pit mines are enlarged until either exhausted or mineral resource, or an increasing proportion of overburden to ore mining makes it more profitable. When this occurs, the mines out sometimes become landfills for solid waste disposal. However, some serve to have a water control and for that these opencast mines become lakes. If the mine is in a climate of constant rainfall could acuíferos.roporción increasing to overload the ore mining makes it more profitable form. When this occurs, the mines out sometimes become landfills for solid waste disposal. However, some serve to have a water control and for that these opencast mines become lakes. If the mine is in a climate of constant rainfall could form aquifers.

Open pit mining extraction

The open pit mines are dug in banks, which describe the vertical levels of the hole. These banks are usually four to sixty meter intervals, depending on the size of the machinery used. Many quarries do not use banks as they are usually shallow.

Most of the walls of the well are generally dug in less than vertical angle, to prevent and minimize the damage and the danger of falling rocks. This depends on the rocks or rock type, and also how many structural weaknesses within rocks occur.