Waterproof mining method with coal seam as main aquifer

Abstract

The invention provides a waterproof mining method with a coal seam as a main aquifer. A row of grouting boreholes are formed along the upper boundary of a mining area or well field through drilling, the coat seam is subjected to grouting, and a water-blocking curtain belt is formed in the coal seam; a row of drainage boreholes I parallel to the upper boundary of the mining area or well field is formed a certain distance away from the lower portion of the water-blocking curtain belt through drilling, several drainage boreholes II are formed uniformly in the periphery of the position of each pre-set shaft for drainage of coal-seam water, and well construction starts when the water pressure of the coal seam drops below the safety value; after well construction, the working area is arranged along the upper boundary of the mining area or well field, and a row of inclined drainage boreholes III are formed from an underground mining roadway to the coal seam through drilling to drain coal-seamfissure water; finally back production of coal is conducted. The method is an effective means to solve the mine water hazard prevention and control under the special mine hydrogeological condition inwhich the coal seam serves as the main aquifer, the targeted property is strong, the method is simple, the design is reasonable, the reliability is high, the cost is low, and the method has a good application and popularization prospect.

Description

technical field [0001] The invention relates to a method for preventing and controlling mine water damage under special mine hydrogeological structural conditions where the coal seam is an aquifer, in particular to a waterproof coal mining method for solving the problem that the coal seam is the main aquifer. Background technique [0002] In the practice of coal mine production, we have discovered the phenomenon of special coalfield hydrogeological structure in which the coal seam is the main aquifer, and even found that the coal seam is the main aquifer. Coal mine water hazard prevention presents serious new challenges. The hydrogeological structure mechanism of the coal seam as the main aquifer is as follows: after the formation of the coal seam, a new geological structural movement occurred, forming a large number of penetrating structural fissures in the relatively brittle original coal seam, and the coal seam floor has better water resistance. If there is a water sourc...

AI Technical Summary

Problems solved by technology

[0002] In the practice of coal mine production, we have discovered the phenomenon of special coalfield hydrogeological structure in which the coal seam is the main aquifer, and even found that the coal seam is the main aquifer. Coal Mine Water Hazard Prevention Presents Serious New Challenges

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