A test system for suppressing underground gas explosions in coal mines with a cavity structure

Abstract

The invention discloses a test system of cavity structures restraining gas explosion under a coal mine, and belongs to the field of coal mine gas disaster management. The test system includes a pipeline, a flange, bolts, nuts, a pressure transducer, the cavity structures, an energy dissipation material, an electrode, an alternating current power supply, a vacuum pump, a digital vacuum meter, a high purity methane gas bottle, an air compressor, a circulating pump, a gas pressing valve, a gas sucking valve, a gas inlet valve, a first circulating valve, a second circulating valve, a dynamic datacollector, an upper computer, a gas exhausting opening, an acceleration piece, a diaphragm piece and a steel piece. The test system is divided into a premixing acceleration section and a shock propagation section with the respect of the diaphragm piece, and the one to three cavity structures are arranged on the shock propagation section. The test system can carry out a quantitative study on the restraining effect of the cavity structures on the gas explosion under the coal mine, the best scale, the best placement, combination structures and the like of the cavity structures can be obtained under different intensity gas explosion conditions, and the theoretical and technical support is provided for coal mine gas disaster management.

Description

technical field [0001] The invention relates to the field of coal mine gas disaster control, in particular to a test system for suppressing coal mine underground gas explosion with a cavity structure. Background technique [0002] Coal accounts for about 70% of my country's primary energy consumption. It is predicted that by 2050, coal will still account for no less than 50% of my country's energy consumption. However, with the continuous increase of coal mining depth, a series of problems will appear, such as the continuous increase of ground stress, gas pressure, and low temperature, etc., followed by rock burst, coal and gas outburst, gas Explosions and other disasters and accidents also continue to occur. According to statistics, 4,172 people have died in coal mine disaster accidents with more than 100 deaths since the founding of the People’s Republic of China, of which 3,424 were caused by gas explosions, accounting for about 82% of the total death toll, which serious...

AI Technical Summary

Problems solved by technology

However, with the continuous increase of coal mining depth, a series of problems will appear, such as the continuous increase of ground stress, gas pressure, and low temperature, etc., followed by rock burst, coal and gas outburst, gas Explosions and other disasters continue to occur

Images