Combined test apparatus for coal and gas burst

Abstract

The invention discloses a comprehensive experimental device for the coal and gas burst, comprising a coal sample chamber, a terrestrial stress simulation loading system and an atmospheric pressure loading device, wherein the terrestrial stress simulation loading system is provided with a force applying capsule and a loading device in a sealed container, the atmospheric pressure loading device is provided with an atmospheric pressure loading channel that communicates with the wall interlayer of the capsule, the loading device comprises at least two loading blocks, the coal sample chamber is enclosed by the loading blocks between which a gap is arranged, and the force applying capsule is sleeved at outside of the coal sample chamber. According to the experimental result observed by a pressure acquisition device and a camera, the invention is capable of simultaneously inspecting the actions of the gas pressure and terrestrial stress in the initiation, start and development of the coal and gas burst through the simulation of coaction of the terrestrial stress and atmospheric pressure to provide the theoretical foundation of forecasting and preventing the coal and gas burst; during the use, the pressure value is capable of being regulated to observe the experimental results under different pressure and the simulation of terrestrial stress or gas pressure only, so that 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 comprehensive 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...

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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