Method for realizing water-preserved mining by utilizing curtain grouting technology

Abstract

The invention discloses a method for realizing water-preserved mining by utilizing a curtain grouting technology. The method comprises the following steps: first determining mining area and a mining depth; determining a depth of an impermeable bedrock (4) at a lower part of a coal bed (3) to be measured; drilling deep holes, along borders of the mining area with intervals of a certain distance, from ground (1) to the impermeable bedrock (4) at the lower part of the coal bed (3) by utilizing the curtain grouting technology; then pouring slurry into pores or fissures around the holes by high pressure, wherein the slurry connects soil or rock surrounding the pores or fissures into a cylindrical impermeable water body, and if hole spacing is suitable, these cylindrical impermeable water bodies connect to form a complete water blocking curtain in order to achieve the purpose of seepage prevention; and draining groundwater in the upper part of the coal bed to be mined in the range of the curtain, and mining the coal bed to be mined, wherein if there are more than two coal beds in the scope, the coal beds can be mined one by one. The method provided by the invention can effectively prevent water inrush accident in mining, as well as greatly reduce the drainage time and cost, and achieve the target of water-preserved mining, and has obvious social and economic benefits.

Description

technical field [0001] The invention relates to a method for realizing water-retaining coal mining by using curtain grouting technology. The method does not affect groundwater resources outside the mining area while mining coal. Background technique [0002] my country is one of the few countries in the world whose primary energy is dominated by coal. As a basic energy source, coal plays a decisive role in the development of the national economy and human progress. But at the same time, the damage caused by coal mining to water resources is also increasing day by day. Coal mining must first drain the aquifer above the coal seam to be mined. Due to the fluidity of water, the draining range is often much larger than the mine field, resulting in a large-scale underground aquifer. The water level dropped, resulting in a large loss of groundwater, drying up of surface water, and deterioration of the environment. Therefore, how to protect the hydrous structure of groundwater reso...

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Problems solved by technology

But at the same time, the damage caused by coal mining to water resources is also increasing day by day. Coal mining must first drain the aquifer above the coal seam to be mined. Due to the fluidity of water, the drainin

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