Bed separation water damage prevention and control method for coal mining

Abstract

The invention provides a bed separation water damage prevention and control method for coal mining, and relates to the technical field of mine geology. The bed separation water damage prevention and control method for coal mining comprises the following steps that mining and geological parameters are acquired before coal mining; a directional drilling implementation area is designed before coal mining; directional drilling is implemented, and perforation is carried out; perforation grouting is carried out after perforation; hole sealing grouting is carried out after perforation grouting; an aquifer observation hole is implemented in the ground after directional drilling and hole sealing; coal mining is carried out, and drainage and supplementary grouting are carried out according to aquifer observation; and no bed separation water damage occurs after coal mining is completed. The method is simple and easy to implement; the influence on the environment is small; the mine water inflow can be reduced, the drainage burden is reduced, and the safety is higher; and the grouting slurry is lower in quantity and price, and the economy and the reasonability are achieved.

Description

technical field [0001] The invention relates to the technical field of mine geology, in particular to a method for preventing and controlling water damage from a separation layer in coal mining. Background technique [0002] Coal mining is affected by many disasters, among which water damage is an important one. Mine water hazards include roof, floor, abscission layer, old empty area and other types, among which abscission layer water damage is of great significance due to its suddenness, difficulty in prevention and control, and great harm. At present, although there are many coal mining separation layer water damage prevention and control technologies, there are the following problems: [0003] 1) Most of the prevention and control technologies for abscisional water inrush are dredging, and the dredging of aquifers will cause environmental problems such as ecological environment degradation, waste of water resources, and land subsidence; [0004] 2) Most of the water is ...

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Problems solved by technology

[0003] 1) Most of the prevention and control technologies for abscisional water inrush are dredging, and the dredging of aquifers will cause environmental problems such as ecological environment degradation, waste of water resources, and land subsidence;

[0004] 2) Most of the water is drained after coal mining, and it is very difficult to drill holes in the broken rock body after mining, and the construction is difficult;

[0005] 3) The amount of drained water increases. When the number of coal mine working faces increases, the drainage burden of the entire mine is huge, and there are subsequent safety hazards;

[0006] 4) Grouting is very difficult to block, and the effect of grouting will be reduced during coal mining. If it is repaired after mining, the amount of work will be huge and the economy will be unreasonable

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