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

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...

AI Technical Summary

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 thickness and the structural conditions of the overlying strata. Therefore, coal mining will lead to damage to water resources and ecological environment

Images