Identification method and coal mining method for water-preserved coal mining area of weathered bedrock aquifer

Abstract

The invention discloses an identification method and a coal mining method for a water-preserved coal mining area of a weathered bedrock aquifer, and the method comprises the following steps: carrying out the identification of a stratum structure of a to-be-mined area needing water-preserved coal mining, dividing the stratum structure of the to-be-mined area into different types, identifying the stratum structures of different types, and obtaining the weathered bedrock aquifer water-preserved coal mining area in each type of stratum structure. The essence of water-preserved coal mining is to protect water resources and ecological environment, and weathered bedrock is different from a loose sand bed and cannot provide a good soil environment for vegetation, so that a water-preserved area of a water-bearing layer of the weathered bedrock is not under the condition of direct damage of coal mining. According to the scheme, the weathered bedrock aquifer area to be protected can be accurately drawn, water resources and the ecological environment are protected while coal is mined, and the green mining of the coal resources is achieved.

Description

technical field [0001] The invention relates to a certain intersection between the field of geological engineering and the field of mining engineering, and in particular relates to an identification method and a coal mining method of a weathered bedrock aquifer water-retaining coal mining area. Background technique [0002] At present, in some areas, the contradiction between coal mining and water resources and ecological environment protection is prominent, so water conservation and coal mining must be carried out. The main target layer of traditional water-retaining coal mining is the loose sand layer. Since the loose sand layer is located at the top of the stratum and is directly related to the surface ecology, the areas where coal mining affects the water in the sand layer are water-retaining coal mining areas. In comparison, weathered bedrock is also an important water resource, but because it is not directly exposed to the surface, it is necessary to carry out identifi...

AI Technical Summary

Problems solved by technology

Compared with the traditional identification of water-retaining coal mining areas, the identification of weathered bedrock water-retaining coal mining areas has the following problems: 1) The types of ecological effects of weathered bedrock aquifers are complex, so comprehensive identification of various factors is required

2) Compared with the loose sand aquifer, the weathered bedrock aquifer has variable lithology, and its water holding capacity in the dry season is an important factor in the identification of water-retaining coal mining areas, which was not considered in the previous identification

3) There may be a hydraulic connection between the weathered bedrock aquifer and the loose sand aquifer. The hydraulic connection is an important indicator for evaluating the weathered bedrock water conservation coal mining area, which was not considered in the previous identification

Due to the above problems, the protection effect on water resources and ecological environment is not good at the same time of coal mining, which does not meet the requirements of green mining of coal resources.

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