Method for reducing surface subsidence range of underground mining area

A technology for surface subsidence and mining areas, applied in underground mining, surface mining, special mining, etc., can solve problems such as large subsidence range, and achieve the effect of simple technical steps, low cost and remarkable effect

Active Publication Date: 2020-06-09
ANHUI UNIV OF SCI & TECH +1
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a method for reducing the subsidence range of the goaf surface, so as to solve the problem that the subsidence range is too large in the prior art due to the traction and stretching of the surrounding soil by the underground mined-out area. technical issues

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  • Method for reducing surface subsidence range of underground mining area
  • Method for reducing surface subsidence range of underground mining area

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Embodiment

[0023] refer to figure 1 and figure 2 It can be seen that in the prior art, the area of ​​ground subsidence after the mining of the underground working face is much larger than the actual mining area. Even if the surface of the mining area is cultivated land without buildings, the surface will also be cracked, resulting in a decline in soil quality and damage to the ecological environment. Because of this, in order to maximize the mining of underground mineral resources, mining companies have to spend a lot of money on village relocation or protection of important structures, or adopt technologies such as filling mining, which greatly increases mining costs.

[0024] To sum up, in this embodiment, in order to reduce the subsidence range caused by mining, so that the safe subsidence range after mining reaches or approaches the range of the expected subsidence area, the following methods are used:

[0025] A method for reducing the scope of surface subsidence in an undergroun...

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Abstract

The invention discloses a method for reducing the surface subsidence range of an underground mining area. The method comprises the following steps of 1, acquiring the position of an underground miningworking face, an advancing direction and speed of the working face and the surface subsidence influence range of the periphery of a projection area of the mining working face; predicting the surfacesubsidence range and time according to the advancing direction and speed of the working face, and dividing a tension area and a tension extrusion area in the potential subsidence range; 3, before thesurface subsidence time point, arranging a drill hole in a potential tension extrusion area and performing controlled blasting or directly digging a groove; and 4, repeating the steps after the surface subsidence time point of the stage arrives. According to the method, the principle of blasting or grooving the rock-soil body so as to destroy the structure of the rock-soil body and block the stress propagation is utilized, so that the tensile stress propagation effect formed from the mining subsidence center to the periphery is reduced, the subsidence range of the periphery of the mining areais reduced, the damage to the peripheral land and structures due to underground mining is reduced, and the danger degree of geological disasters of other mining areas is reduced.

Description

technical field [0001] The invention relates to surface geological disaster prevention and ecological environment protection technology in an underground mining area, in particular to a method for effectively reducing the surface subsidence range of a goaf and protecting surface structures. Background technique [0002] The mine geological disasters in our country are very serious, and the ground subsidence caused by underground mining is one of the most common types of mine geological disasters in mining areas. In plain mining areas, ground subsidence not only causes damage to ground buildings, transportation facilities, dams and other structures, but also causes land quality degradation or land resource damage in mining areas. [0003] According to the characteristics of surface subsidence and deformation in the underground mining area, due to the traction and stretching effect of the subsiding soil on the periphery, the ground surface in a certain range outside the surfac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16
CPCE21C41/16
Inventor 严家平蔡毅黄河倪建明许帮贵刘伟
Owner ANHUI UNIV OF SCI & TECH
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