Detection method of stope bottom rock stratum of open coal mine

Abstract

The invention provides a detection method of a stope bottom rock stratum of an open coal mine. The method includes the following steps: conducting geophysical prospecting on the stope bottom rock stratum to obtain distribution and thickness of a water-resisting stratum and a water-bearing stratum and preliminary data of fault distribution and fault throw, conducting drilling prospecting on the water-resisting stratum, the water-bearing stratum and a fault according to the preliminary data of the geophysical prospecting, conducting preliminary site selection on a reservoir according to accurate data of distribution and thickness of the water-resisting stratum and the water-bearing stratum and preliminary data of fault distribution and fault throw which are obtained by the drilling prospecting process, sampling the rock stratum of the reservoir preliminarily selected to obtain permeability coefficient and permeable rate of rock stratum samples and determining the site of the reservoir according to the permeability coefficient and the permeable rate. The method preliminarily selects the site of the reservoir by the geophysical prospecting and the drilling prospecting, analyzes the rock stratum samples to obtain the permeability coefficient and the permeable rate of the rock stratum and finally selects the optimum reservoir with optimum impermeable performance according to the permeability coefficient and the permeable rate. Therefore, the underground reservoir can be reasonably utilized, and underground water resources can be protected.

Description

technical field [0001] The invention relates to the field of mining engineering, in particular to a method for detecting the rock formation at the bottom of an open-pit coal mine stope. Background technique [0002] Aiming at the mine water in the process of coal mining, at present, it is mainly pumped and drained. A large amount of mine water is discharged from the mining area. On the one hand, it causes a waste of water resources, and on the other hand, it occupies a large amount of land and pollutes the surface soil vegetation. Especially in the mining process of open-pit coal mines, it is first necessary to drain the ore body to reduce the groundwater in the mining stratum to below the mining level to ensure normal production and safety. These mine waters are discharged after being purified on the ground, forming large-scale puddles and occupying a large amount of land resources. At the same time, because the mining areas are mostly in arid areas, the surface evaporation...

AI Technical Summary

Problems solved by technology

These mine waters are discharged after being purified on the ground, forming large-scale puddles and occupying a large amount of land resources. At the same time, since the mining areas are mostly located in arid areas, the surface evaporation is large, and a large amount of water resources are evaporated, resulting in waste of water resources. , and at present, most of the mine water in mining areas only undergoes simple purification treatment, which contains a large number of polluting elements, causing serious pollution to surface soil and vegetation

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