Simulation experiment device and experiment method for coal mine gas dynamic disaster under simulation environment

Abstract

The invention discloses a simulation experiment device for coal mine gas dynamic disaster under a simulation environment. The device comprises a loading frame, wherein a pneumatic hammer and two Z direction loading hydraulic cylinders are mounted on the loading frame, and a Z direction loading plate is connected between the bottom ends of piston rods of the two Z direction loading hydraulic cylinders; a Y direction guide rail and an X direction guide rail are connected to the bottom of the loading frame; a protruding cylinder body and a Y direction loading hydraulic cylinder are arranged on the Y direction guide rail, and an X direction loading hydraulic cylinder is arranged on an X direction motor trolley; a Z direction loading port is formed in the top of the protruding cylinder body, a Y direction cylinder and an X direction cylinder are connected to the side wall of the protruding cylinder body, and a protruding port is formed in the upper surface of the X direction cylinder; a fourth pipeline with an opened tail end is connected to the X direction cylinder; a vacuum-pumping system and a gas loading system are connected to the protruding cylinder body. The invention further discloses an experiment method using the device, coal mine rock burst, gas flow field, overlaying strata stress and horizontal tectonic stress can be simulated, the experiment simulation degree is improved, and the experiment success rate and the accurate degree are improved.

Description

technical field [0001] The invention relates to an experimental device and an experimental method for simulating coal mine gas dynamic disasters in a simulated environment, in particular to an experimental device for simulating the outburst process induced by rock burst. Background technique [0002] Coal and gas outburst is a very serious accident disaster in the process of coal mine production, but the mechanism of coal and gas outburst has not been determined, and it is still in the stage of hypothesis explanation. [0003] At present, the main hypotheses include the gas action hypothesis, the ground stress action hypothesis, the chemical essence action hypothesis, and the comprehensive action hypothesis. At present, there are many supporters for the hypothesis that the combined action causes coal and gas outburst. [0004] The comprehensive action hypothesis believes that during the mine production process, the mining activities lead to changes in the in-situ stress and ...

AI Technical Summary

Problems solved by technology

At present, most of the simulated outburst experimental devices can only realize vertical stress loading and supply a certain gas pressure, and cannot realize lateral and horizontal loading.

[0008] 2) It is impossible to simulate the outburst process induced by impact load

However, the current coal and gas outburst simulation experiment device can only conduct outburst experiments under the condition that the coal body is in a confined space, and cannot conduct gas outburst simulation experiments under the condition of the gas flow field.

[0010] 4) At present, most of the equipment has a complicated structure, it is troublesome to load and unload coal samples, and the experiment period is long and the efficiency is low.

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