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A method for narrowing the range of surface subsidence in underground mining areas

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: 2021-10-01
ANHUI UNIV OF SCI & TECH +1
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  • Abstract
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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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  • A method for narrowing the range of surface subsidence in underground mining areas
  • A method for narrowing the range of surface subsidence in underground mining areas

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Embodiment

[0023] refer to figure 1 with figure 2 It can be seen that in the prior art, the area of ​​the ground sinking in the underground working surface is much larger than the actual mining area. Even if the surface of the mining area is a cultivated land of non-structural, the surface is also cracking, resulting in the decline of soil quality and the damage of the ecological environment. Because of this, in order to make greater mining underground mineral resources, mining enterprises have to spend a large amount of funding for the protection of village relocation or important structures, or adopting filling mining, etc., which greatly increases the cost of exploitation.

[0024] In summary, in the present embodiment, in order to reduce the scope of the subdusion caused by mining, the scope of the safety sink after the mining is reached or approaches the range of the desired sink zone, and is carried out by the following method:

[0025] A method of narrowing the scope of the subsidence...

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Abstract

The invention discloses a method for reducing the scope of surface subsidence in an underground mining area. The method includes the following steps: 1. Obtain the position of the underground mining working face, the advancing direction and speed of the working face, and the influence range of the peripheral surface subsidence in the projection area of ​​the mining working face; 2. According to the advancing direction and speed of the working face, predict the scope and time of surface subsidence, and divide the extension zone and tension compression zone within the potential subsidence range; 3. Before the time point of surface subsidence, in the potential tension compression zone Arrange drilling and carry out controlled blasting, or dig trenches directly; 4. After the time point of surface subsidence comes, repeat the above steps. The invention utilizes the principle of blasting or digging the rock-soil body to destroy the rock-soil structure and block the stress propagation, and reduces the tensile stress propagation effect formed from the center of the mining subsidence to the periphery, thereby reducing the subsidence range of the periphery of the mining area. Reduce the damage to surrounding land and structures due to underground mining, and the risk of other geological disasters in mining areas.

Description

Technical field [0001] The present invention relates to the prevention and treatment of surface geological disasters in underground mining areas, in particular, relates to a method of effectively narrowing the scope of surface subsidence and surface structures protection. Background technique [0002] my country's mine geological disaster is very serious, and the ground settlement caused by underground mining is one of the most common types of mine geological disasters in the mining area. In the plain mining area, ground subsidence is not only damaged by structures such as land houses, transportation facilities, and dams, but also causes decline in land quality in mine or land resources. [0003] According to the characteristics of the subsidence of the underground mining area, the slitting tensile effect is generated due to the subwoot to the periphery, thereby also cause a certain range of surfaces other than a range of surfaces other than a certain extent. Under normal circums...

Claims

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Application Information

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Patent Type & Authority Patents(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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