Test apparatus for coal and gas burst

Abstract

The invention discloses an experimental device for the coal and gas burst, comprising a coal sample chamber and an atmospheric pressure loading device, wherein the coal sample chamber is provided with coal and gas exhaust nozzles having control valves, the atmospheric pressure loading device is provided with an atmospheric pressure loading channel that communicates with the inside of the coal sample chamber having a diaphragm in front of the control valves, and a cavity between the diaphragm and the control valves is a balancing cavity connected with a balanced atmospheric pressure loading device; the device also comprises a pressure acquisition device in the coal sample chamber and a camera arranged outside the coal sample chamber and the part of the coal sample chamber opposite to the camera is transparent. The invention is capable of simulating the pressure of gas and physical force of coal, achieving the instant fast pressure release to be closer to the actual coal and gas burst and the damage process of coal, and observing and recording the simulation to provide the theoretical foundation of forecasting and preventing the coal and gas burst; during the use, the grain diameterof powdered coal, pressure while the formation and charging pressure can be regulated to observe the grain diameter parameters of different powdered coals and the experimental result under different pressures, and the device is flexible in use.

Description

technical field [0001] The invention relates to a coal scientific research device, in particular to a coal and gas outburst test device. Background technique [0002] Coal and gas outburst accidents refer to the abnormal dynamic phenomenon in which broken coal and gas are suddenly thrown from the coal body or rock body to the mining space under the joint action of in-situ stress and gas during the coal mining process. Tons to thousands of tons or even more than 10,000 tons of broken coal rocks are thrown from the coal rock mass to the mining space within a few seconds to tens of seconds, accompanied by a large amount of gas gushing out, causing serious harm. [0003] Coal and gas outburst are the most serious dynamic disasters in underground coal mines, and their occurrence is closely related to in-situ stress, gas pressure, and physical and mechanical properties of coal and rock, among which gas pressure plays an important role. The occurrence forms of gas in coal include ...

AI Technical Summary

Problems solved by technology

Coal and gas outbursts are geological disasters. For a long time, since the destruction process of coal and gas outbursts cannot be directly observed, it is impossible to predict and prevent them. Therefore, accidents caused by coal and gas outbursts are also relatively frequent.

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