Coal and gas outburst simulation test device and protection device thereof

Abstract

The invention discloses a coal and gas outburst simulation test device, which comprises a steel cylinder, flange disks arranged at two ends of the steel cylinder, an inflation system and a data acquisition system. The flange disk which is arranged at one end of the steel cylinder is a flange disk provided with a central hole, and an explosion-proof plate is arranged on a non-mounting side of the flange disk and the steel cylinder. The invention also relates to a protection device for the coal and gas outburst simulation test device, which mainly comprises a bearing flanged pipe fitting, a pressure relief cavity, an anti-overload safety valve, an air release valve and a shock-proof pressure gauge. One end of the bearing flanged pipe fitting is connected with the coal and gas outburst simulation test device, and the other end of the bearing flanged pipe fitting is connected with the pressure relief cavity through a flange disk; and the tail end of the pressure relief cavity is provided with a flange cover. The protection device can be applied to real-time measurement and safe pressure relief in the test process.

Description

technical field [0001] The present invention relates to a coal and gas outburst device and its protective test device, in particular, it relates to the simulated test research of coal and gas outburst under different ground stresses and different gas pressures, and simultaneously studies the acoustic emission signal during the outburst process. Coal and gas outburst simulation test device for propagation law and attenuation characteristics. Background technique [0002] In terms of coal and gas outburst mechanism research, the comprehensive hypothesis put forward by Dr. Hodot of the Soviet Union in 1958 is still the most representative, and it is believed that gas outburst is the result of the combined action of three factors: in-situ stress, gas and coal physical and mechanical properties. But so far, the mechanism of coal and gas outburst is still unclear. Since the 1950s, the Soviet Union has carried out outstanding simulation experiments in the laboratory. Tests have b...

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Problems solved by technology

[0008] However, although the above coal and gas outburst devices have promoted the development of such devices to a certain extent, they all have certain limitations or defects:

[0009] (1) Failure to effectively capture the distribution and variation of pressure in the container cavity before, during, and after the outburst, and to realize real-time image output;

[0010] (2) The opening method of the protruding mouth of the device is manual, which threatens the personal safety of the experimenters to a certain extent, and is inconsistent with the actual situation;

[0011] (3) The coal and gas outburst test is dangerous, and the outburst process cannot be effectively protected

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