Series inflatable capsule system for simulating coal seam mining through three-dimensional similarity test and operation method

Abstract

The invention discloses a series inflatable capsule system for simulating coal seam mining through a three-dimensional similarity test and an operation method, and relates to the field of coal seam mining three-dimensional similarity tests. The series inflatable capsule system comprises an inflation bag, an inflation pipe, a U-shaped pipe, a deflation valve, a barometer, an inflation pressure stabilizing device, an inflation valve, an inflation control device and a simulation mining coal seam. According to the series inflatable capsule system for simulating coal seam mining, controllable excavation of a three-dimensional similar model in a closed space and real representation of the original stress state of a mining coal seam can be achieved, and step-by-step excavation of the coal seam, especially segmented excavation of the coal seam, can be truly simulated to be consistent with the actual coal seam mining process; and meanwhile, by controlling the deflation speed and the interval time of the deflation valve on the series inflatable capsule system for simulating coal seam mining, the excavation speed of the simulated coal seam mining can be realized.

Description

technical field [0001] The invention relates to the field of three-dimensional similarity test of coal seam mining, in particular to a system and an operation method of series inflatable capsules used for three-dimensional similarity test to simulate coal seam mining. Background technique [0002] The physical similarity test has the advantages of strong intuition, good flexibility, high efficiency and good repeatability. The physical similarity simulation of the coal seam mining process can intuitively and vividly reproduce the dynamic evolution process of the coal seam top and bottom slab cracks, expansion, penetration and roof slab fall. As for the three-dimensional similar simulation test device, simulating the excavation process of the coal seam in a confined space is a difficulty and key to realize the three-dimensional similar simulation. [0003] In the existing technology, the coal seam excavation process is usually simulated by one-time extraction of a coal seam o...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the coal seam excavation process is usually simulated by one-time extraction of a coal seam or the method of pumping steel plates and planks to simulate the mining of the coal seam. step excavation, it is impossible to simulate the segmental excavation of the coal seam, which is inconsistent with the mining process of the coal seam in the actual project

Similarly, Wang Hongwei et al. (Large-scale three-dimensional loadable similar simulation test for mining of large-dipping coal seams [J]. Journal of Coal Science, 2015, 40(7): 1505-1511) melted and discharged the cemented and easily soluble blocks packed in capsules by water injection. method, the similar simulation of coal seam excavation with a large dip angle in a three-dimensional confined space is realized, but the bearing capacity of the cemented soluble block packed in the capsule is small, and it cannot be quantitatively controlled, let alone simulate the original stress state of the coal seam; at the same time, due to The capsule for simulating coal seam excavation is a long-shaped capsule that runs through the entire working face, and it is impossible to simulate the segmental excavation process of coal seam

Images