High-pressure gas coal breaking experimental device
An experimental device and gas technology, applied in the mining field, can solve the problems of atmospheric pressure and rare experimental devices, and achieve the effects of low manufacturing cost, high safety and strong leakage resistance
Inactive Publication Date: 2015-06-10
CHONGQING UNIV
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Problems solved by technology
[0003] At present, experimental devices for coal-bearing rock gas are relatively rare, and generally use devices that observe coal and rock while applying in-situ stress under high-pressure gas conditions. There is no device for observing the instantaneous pressure release of high-pressure gas, resulting in instantaneous From high pressure state to atmospheric pressure, the experimental device for the state of coal and rock fragmentation and the change of temperature and pressure state at this stage
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Embodiment Construction
[0017] The present invention will be further described below in conjunction with drawings and embodiments.
[0018] Such as figure 1 , figure 2 , image 3 As shown, the present invention includes a sample test cylinder 1, a piston rod 2, a rupture disc 3, a temperature sensor 4, a pressure sensor 5, a high-pressure gas tank 6, a sample base 7, a fixed piece 8, a data acquisition and analyzer 9, and a display screen 10. Parts such as printer 11, gas pipeline 12, switch valve 13 and sealing ring 14, the sample test cylinder 1 has an inner cavity 1a, and the inner cavity 1a of the sample test cylinder 1 is cylindrical or square, and the present embodiment is preferably In the cylindrical inner cavity, a piston rod 2 is arranged above the sample test cylinder 1, and the lower end of the piston rod 2 vertically extends downward through the top wall of the sample test cylinder 1 into the inner cavity 1a. A sealing ring 14 is installed on the contact surface between the piston ro...
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The invention discloses a high-pressure gas coal breaking experimental device. A piston column 2 is arranged above a sample test cylinder 1; two blast holes are symmetrical formed in the wall of the sample test cylinder 1; burst pieces 3 are arranged in the two blast holes; the blast holes are sealed by the burst pieces 3; a temperature detection hole and a pressure detection hole are also formed in the wall of the sample test cylinder 1; a temperature sensor 4 is arranged in the temperature detection hole; a pressure sensor 5 is arranged in the pressure detection hole; a gas pipeline 12 is arranged in the wall of the sample test cylinder 1; one end of the gas pipeline 12 stretches into an inner cavity 1a, and the other end of the gas pipeline 12 is connected with a high-pressure gas tank 6 outside the sample test cylinder 1. The burst pieces which can be damaged by high-pressure gas serve as tools for instantaneous pressure relief, a sample damage state and the temperature and pressure can be observed, and the device has the characteristics of low manufacturing cost, high leakage resistance, high safety and the like.
Description
technical field [0001] The invention relates to the field of mining, in particular to an experimental device for observing the broken state of coal and rock under high-pressure gas state. Background technique [0002] Coal and gas outburst is an extremely complex mine gas dynamic phenomenon encountered in coal mine production. In recent years, coal mine gas explosions and coal and gas outburst accidents have occurred frequently in various places, and coal mine gas disasters have seriously affected the healthy development of the coal industry. At present, experts and scholars generally believe that coal and gas outbursts are the result of the combined effects of in-situ stress, gas pressure, and physical and mechanical properties of coal and rock. Therefore, research on the mechanical properties of coal and rock under the coupling effect of in-situ stress and gas is carried out, especially from the mesoscopic point of view, to study the crack generation, dynamic process of e...
Claims
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IPC IPC(8): G01N33/22
Inventor 黄滚罗甲渊张龙张鑫邓玉华郭虎熊阳涛
Owner CHONGQING UNIV