Method for preventing and controlling water damage reinforcement of coal seam floor fault

Abstract

The invention discloses a method for preventing and controlling water damage reinforcement of a coal seam floor fault. The method comprises the following steps of: S1, acquiring coal mining geological conditions; S2, exploring fault conditions; S3, establishing a natural numerical model according to the acquired coal mining geological conditions and fault conditions; S4, designing a reinforcement scheme, including laying reinforcement and a protective layer, wherein when the reinforcement is laid, the reinforcement is obliquely crossed with the fault and forms a preset included angle with the trend of a middle rock stratum, the laying range of the reinforcement is implemented at intervals along the extension range of the fault, and the reinforcement is positioned within a preset distance of a floor of a coal seam; designing the protective layer between a water damage source stratum and the fault; S5, adopting the natural numerical model, performing parameter assignment on the numerical model according to the reinforcement scheme, and performing mining simulation of the coal seam to obtain a final reinforcement design scheme; and S6, setting the reinforcement and the protective layer according to the final reinforcement design scheme. The method disclosed by the invention has good fault reinforcement and waterproof effects, and is environment-friendly.

Description

technical field [0001] The invention relates to the field of mine geology and intersects with the field of mining engineering to a certain extent, and in particular relates to a method for preventing and controlling water disaster reinforcement in coal seam floor faults. Background technique [0002] At present, water damage to the floor is very prominent, especially when there are faults, there are more water inrushes on the floor. The main methods of water damage prevention and control under the condition that the floor contains faults include grouting and water-repellent depressurization, but the existing technology has the following problems: [0003] 1) Some hydrogeological conditions for drainage and depressurization are not allowed, and the replenishment is too good. In addition, the dredged groundwater has great damage to the groundwater and is not environmentally friendly. [0004] 2) Injecting cement slurry into the fault is the most commonly used method, but the...

AI Technical Summary

Problems solved by technology

[0003]1) Some hydrogeological conditions for drainage and depressurization are not allowed, and the supply is too good

In addition, the dredged groundwater has great damage to the groundwater and is not environmentally friendly.

[0004]2) Injecting cement slurry into faults is the most commonly used method, but cement has strong compressive strength, but low tensile strength, and it is easy to occur after injection Shrinkage, enhanced strength Fault effect and waterproof effect are not good

[0005]3) Although injecting chemical slurry into faults can improve various mechanical effects, it will cause serious environmental pollution

Images