Mining method for gentle dip thick and big lean ore body mining space reconstitution

Abstract

The invention discloses a mining method for gentle dip thick and big lean ore body mining space reconstitution. According to the mining method, the manner of mining space reconstitution is adopted, two high-strength horizontal isolating layers are built in a gentle dip thick and big lean ore body, the horizontal isolating layers serve as the boundary, the gentle dip thick and big lean ore body is divided into the upper block, the middle block and the lower block in the vertical direction, and accordingly the gentle dip thick and big lean ore body is reconstituted into the three block ore bodies of the gentle dip ore body, the dip ore body and the steep dip ore body in the spatial form; and then for each block ore body obtained after the mining space reconstitution is conducted, mining scheme selection and design are conducted according to the mining technology conditions of the block ore bodies, and accordingly the purpose that caving method mining is adopted for most of ore body regions is achieved. The mining method is especially suitable for underground metal ore gentle dip thick and big lean ore body mining, and the mining method has the beneficial effects of being small in mining cost, small in rock body movement zone range, small in disturbance to the surface of the earth, controllable in earth pressure movement and safe in operation.

Description

technical field [0001] The invention relates to a mining method, in particular to a mining method for reconstructing the mining space of a gently inclined thick large lean ore body. Background technique [0002] Gently inclined ore bodies have always been difficult to mine. Due to the low grade of ore, large scale of ore body, wide range of mining and high mining height of thick, large and lean ore bodies, the low-cost caving method or open field method is often used for mining in the traditional technology, and the top-down method is adopted in the vertical direction. The mining sequence of the ore body is recovered. This technology is more suitable for inclined, steeply inclined thick and large ore bodies. However, for the gently inclined thick, large and lean ore bodies, due to the large occurrence range of the ore bodies, a huge caving area or goaf will be formed after the ore body collapses, and a huge range of rock mass movement zones will be delineated, which will e...

AI Technical Summary

Problems solved by technology

However, for the gently inclined thick, large and lean ore bodies, due to the large occurrence range of the ore bodies, a huge caving area or goaf will be formed after the ore body collapses, and a huge range of rock mass movement zones will be delineated, which will easily cause large Large-scale ground pressure activity, which also has a significant impact on surface structures

However, if other mining methods such as the filling method are used, the mining cost will be too high, the economic benefit of the ore body mining will be low, and the technical problems that cannot be mined will be faced.

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