Water control coal mining method and device below compound water body

Abstract

The embodiment of the invention provides a water control coal mining method and device below a compound water body. The method includes the steps that compound water body occurrence characteristic information and coal seam mining overburden failure height predictive information are obtained so that a watery zone, a collapse and fracture safety zone and a sudden water gushing zone can be obtained according to the compound water body occurrence characteristic information and the coal seam mining overburden failure height predictive information; and a water control mining scheme is determined according to the watery zone, the collapse and fracture safety zone and the sudden water gushing zone. Through detection of water body and rock mass detection and the technology combining underwater mining with unwatering or drainage mining, combining hole drilling mining after drainage with mining while drainage, combining hole drilling unwatering or drainage with stoping unwatering or drainage andcombining overburden control with the aquifer drainage degree, the water gushing amount and the water gushing form of a working face are controlled, the man-made water guide passageway hidden danger caused by excessive water drainage and discharge is reduced, the hole drilling work amount and the water drainage expense are reduced, and safe, efficient and green mining of coal resources pressed below the compound water body is achieved.

Description

Technical field [0001] The invention relates to the technical field of coal mining, in particular to a water-controlled coal mining method and device under a composite water body. Background technique [0002] Coal accounts for more than 60% of my country's primary energy production and consumption structure in the long-term. A total of 3.75 billion tons of coal was produced in 2019, which has a major impact on my country's economic development. The geological and mining conditions and hydrogeological conditions of coal mines in my country are extremely diverse, complex and changeable. The types of water bodies are various and varied, and the current situation of water bodies pressing coal is complicated. According to incomplete statistics, my country's coal reserves threatened by water damage account for about 27% of the proven reserves, and my country's key coal mines have water-threatened coal reserves of about 25 billion tons, of which the coal reserves under water are about ...

AI Technical Summary

Problems solved by technology

In recent years, coal mine water damage accidents have generally shown a downward trend, but relatively large water damage accidents are still on the rise. Disastrous water inrushes cause casualties and property losses due to insufficient drainage capacity

The retention of waterproof coal rock pillars has caused a large loss of coal resources, and excessive drainage of water bodies will increase the amount of water inflow and drainage costs in the mine, resulting in a sharp drop in groundwater levels and serious damage to the ecological environment of the mining area.

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