Dynamic system for coal and gas outburst dynamic effect simulation experiment

Abstract

The invention discloses a dynamic system for a coal and gas outburst dynamic effect simulation experiment. The dynamic system comprises a pressure container and an outlet device, wherein the pressure container is filled with simulation experiment materials, is fixed on the ground and is provided with an opening as well as a container inflating hole and an openable and closable coal inlet; the outlet device is connected with the container opening and an experiment roadway, and is internally provided with an explosion venting mechanism for sealing and opening the container opening during compression. According to the dynamic system, coal body granules are added to the pressure container from the coal inlet, gases are charged from the container inflating hole, and when pressure reaches the shot point of the explosion venting mechanism, the container opening is instantaneously opened, the pressure container is communicated with the experiment roadway at the time, a coal body is crushed and thrown, and the dynamic effect simulation experiment is started. The dynamic system disclosed by the invention is simple in structure, enables experimenters to clearly know a coal and gas outburst disaster-causing mechanism and a disaster occurrence and development law and can be used for effectively controlling coal and gas outburst disasters.

Description

technical field [0001] The invention relates to a mine disaster simulation experiment system, in particular to a power system used for simulation experiments of coal and gas outburst dynamic effects. Background technique [0002] Coal and gas outburst is one of the most serious disasters in coal mining in my country. The dynamic effect produced when the outburst occurs can destroy the production system, cause casualties, and easily cause major accidents such as coal dust and gas explosions. Therefore, in order to minimize the destructive effect of disasters, it is necessary to study the disaster-causing mechanism of coal and gas outburst, and explore effective disaster control methods and measures. The overall process of coal and gas outburst can be regarded as two different stages, one of which is the crushing process of the outburst coal body, which is mainly characterized by the destruction of the coal body under the joint action of in-situ stress, gas pressure and minin...

AI Technical Summary

Problems solved by technology

[0003] Due to the complexity of coal and gas outburst and the limitations of research methods and means, there are few theoretical studies on the disaster-causing theory of coal and gas outburst at home and abroad.

There are insurmountable difficulties in laboratory simulation and on-site actual observation of outstanding dynamic disasters

Although a large number of coal and gas outburst experiments have been carried out at home and abroad, and many breakthroughs have been made, most of the research results focus on the law of adsorption and desorption, the law of coal destruction, the effect of in-situ stress, and the parameters of briquette coal. Issues such as fluid movement parameters and flow state during coal and gas outburst, shock wave formation mechanism, impact damage to main ventilation facilities, damage effect, disaster-causing conditions and early warning and protection are relatively few. The main reasons are as follows: First, due to the complexity of the solid-gas two-phase flow problem, there are still no very mature theoretical results to explain the movement of the two-phase flow; second, the existing coal and gas outburst laboratory outburst models are difficult to achieve on-site practice. Due to the requirements of the conditions, the effect of the dynamic effect experiment is not obvious; thirdly, the relevant description of the dynamic damage and impact on the spot is not detailed enough, and due to the coal mine safety regulations and safety equipment restrictions, there are few pictures and video materials on the spot, which is not conducive to the identification of the problem. Research

The above reasons lead to a relatively lagging research on the hazards caused by outbursts. People cannot fundamentally explain the hazards brought about by outbursts, let alone directly apply the conclusions drawn from theoretical analysis to guide practice.

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