Simulation experimental method for dynamic effect of coal and gas outburst

Abstract

The invention discloses a simulation experimental method for a dynamic effect of coal and gas outburst. The simulation experimental method comprises the following steps: A, preparing a coal and gas outburst experimental system, wherein the system comprises a pressure container and a pipeline system which are fixed on the ground, a material inlet, an inflating hole and a sensor hole are formed in the pressure container, an outburst hole is formed in the pressure container, the outburst hole is connected with an explosion discharging device, the explosion venting device comprises a diameter variable pipe, a first bursting piece and a second bursting piece, whether the diameter variable pipe and the pressure container are inflated is controlled by a control chip according to the pressure intensity measured by the first sensor and the second sensor; B, filling coal particles into the pressure container from the material inlet; and C, gradually inflating the pressure container and the diameter variable pipe for increasing the pressure, and controlling the first bursting piece and the second bursting piece to be burst, so that the coal and gas outbursts. According to the simulation experimental method for the dynamic effect of the coal and gas outburst, the overall experimental effect of the dynamic effect is guaranteed to the maximal extent, and theoretical basis is provided for protecting and controlling the disaster of the coal and gas outburst.

Description

technical field [0001] The invention relates to an experimental method for simulating dynamic effects of coal and gas outburst. 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 effects of disasters, it is necessary to study the disaster-causing mechanism of coal and gas outbursts and explore effective disaster control methods and measures. [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. Alth...

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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 scholars at home and abroad have carried out a large number of coal and gas outburst experiments and made many breakthroughs, 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 briquettes. There are relatively few studies on many issues, such as the fluid motion parameters and flow state in the process of coal and gas outburst, the formation mechanism of shock waves, the impact damage to main ventilation facilities, damage effects, disaster-causing conditions, and early warning and protection. The main reasons are: : ① Due to the complexity of the solid-gas two-phase flow problem, there are still no very mature theoretical results to explain the movement law of the two-phase flow; ② The existing coal and gas outburst laboratory outburst models are difficult to meet the requirements of the actual site conditions , the experimental effect of the dynamic effect is not obvious; ③The relevant description of the dynamic damage and impact of the highlighted site is not detailed enough, and due to the restrictions of coal mine safety regulations and safety equipment, there are few pictures and video materials of the highlighted site, which is not conducive to the research of the problem

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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