Method of determining water-preserved mining geological conditions under loose water bearing layer

A technology for mining with geological conditions and water conservation. It is used in underground mining, surface mining, and earth-moving drilling. It can solve problems such as water resources and ecological environment damage, and achieve the effect of optimizing resource recovery rate and water resources protection.

Inactive Publication Date: 2013-01-09
CHINA SHENHUA ENERGY CO LTD +1
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Problems solved by technology

[0005] In the past, before coal mining, it was not possible to accurately detect its internal geological structure and grasp the changes in coal thic

Method used

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  • Method of determining water-preserved mining geological conditions under loose water bearing layer
  • Method of determining water-preserved mining geological conditions under loose water bearing layer
  • Method of determining water-preserved mining geological conditions under loose water bearing layer

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Embodiment Construction

[0024] Such as figure 1 As shown, a method for determining the geological conditions of water conservation exploitation under a loose aquifer in a preferred embodiment of the present invention comprises the following steps:

[0025] In step 101, the geological parameters of the mining area are detected first, so as to realize the survey of the hydrogeological conditions of the mining area. The geological parameters include aquifer pressure. In the survey of hydrogeological conditions in the mining area, in order to obtain the geological parameters of water conservation mining, the method based on geophysical exploration technology is used to dynamically investigate the hydrogeological conditions in the mining area. In the present invention, the method based on geophysical exploration technology includes seismic method, Electric method, geological radar method and the effective combination of these methods can obtain more accurate key information such as coal strata structure,...

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Abstract

The invention discloses a method of determining water-preserved mining geological conditions under a loose water bearing layer. The method comprises the following steps of: carrying out geological reconnaissance on a mining area so as to obtain geological parameters, wherein the geological parameters comprise pressure of the water bearing layer; figuring up the thickness of an effective protecting layer of a top plate of a coal layer according to the geological parameters; figuring up a water-preserved danger coefficient according to the thickness of the effective protecting layer and the pressure of the water bearing layer; and determining the water-preserved mining geological conditions according to the lithological character and the structure of the effective protecting layer, the thickness of the effective protecting layer and the water-preserved danger coefficient. According to the invention, the geological conditions of the mining area are prospected, the migration trend of underground water is predicated, the resource recovery rate and the water resource protection are optimized, and a scientific and reasonable technical method is provided for protecting the underground water resource of the mining area.

Description

technical field [0001] The invention relates to aquifer geological mining technology, in particular to a method for determining geological conditions for water conservation mining under loose aquifers. Background technique [0002] The surface ecological environment in some coal resource areas is very fragile, and the phreatic water near the shallow coal seam is easily lost due to the impact of mining, which will lead to further deterioration of the environment. Therefore, water conservation mining is the key to the development of coal seams in ecologically fragile areas Safeguard technology. [0003] The research shows that the mining of the shallow coal seam makes the roof breakage directly affect the surface, the roof breakage angle is large, the surface subsidence is fast, and the incoming pressure is obvious and difficult to control. However, in terms of water resources protection in mining, there are very few research results, and no mining concepts and mining methods...

Claims

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Application Information

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IPC IPC(8): E21C41/16
Inventor 孟召平赵永峰彭苏萍
Owner CHINA SHENHUA ENERGY CO LTD
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