Method for simulating coal seam mining by using rubber hydraulic bags

Abstract

The invention discloses a method for simulating coal seam mining by using rubber hydraulic bags. Rubber hydraulic bags, a pressure gage, a check valve, a pump station, and a ball valve are connected by a rubber pipe to form a sealed system for simulating coal seam mining by using the rubber hydraulic bags. The method comprises the following steps of: preparing liquid with certain concentration, and checking whether a liquid circulation pipe is leaked; filling liquid into the rubber hydraulic bags to ensure no air residue; horizontally arranging a group of rubber hydraulic bags on a model rack, and filling liquid sequentially; paving rock stratums of different properties on the rubber hydraulic bags sequentially; after the model is dried, excavating the dried model; opening the ball valve, discharging liquid in the rubber hydraulic bags, and observing a rock strata movement rule and the reading of the pressure gage; drawing the pressure change curve of the pressure gage; and if the coal seam mining is needed, discharging liquid according to mining yield. The method is simple and convenient, saves a large amount of time of testers, and improves working efficiency. Through the sampling test, the test result is very ideal, and various influence factors are avoided.

Description

technical field [0001] The invention relates to a method for simulating coal seam mining with a rubber hydraulic bag. Background technique [0002] In order to study the deformation, movement and failure of the rock mass affected by mining after the mining of useful minerals, a similar simulation test with a certain similarity ratio is often used to conduct qualitative analysis in the laboratory. In the laboratory, the simulation of coal seam mining has certain limitations, especially when simulating repeated mining of coal seams, various external factors will destroy the law of rock mass movement and deformation. Through investigation, it was found that some people used saw blades, wooden boards, electric drills, etc. to simulate coal seam mining, which easily caused distortion of the movement and deformation of the overlying strata in the goaf (inconsistent with relevant theories), and the collapse of the test model, which not only caused certain economic losses. Losses, ...

AI Technical Summary

Problems solved by technology

Through investigation, it was found that some people used saw blades, wooden boards, electric drills, etc. to simulate coal seam mining, which easily caused distortion of the movement and deformation of the overlying strata in the goaf (inconsistent with relevant theories), and the collapse of the test model, which not only caused certain economic losses. loss, and wasted a lot of time of the experimenters

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