Experimental Study on Migration Rule of Coal-gas Flow in Process of Outburst

SUN Dongling; CAO Jie; XIONG Yunwei; DAI Linchao; WANG Bo

Mining Safety & Environmental Protection > 2017 > 44(2): 26-30.

SUN Dongling, CAO Jie, XIONG Yunwei, DAI Linchao, WANG Bo. Experimental Study on Migration Rule of Coal-gas Flow in Process of Outburst[J]. Mining Safety & Environmental Protection, 2017, 44(2): 26-30.

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Experimental Study on Migration Rule of Coal-gas Flow in Process of Outburst

1. State Key Laboratory of Gas Disaster Monitoring and Emergency Technology, Chongqing 400037, China;
2. China Coal Technology and Engineering Group Chongqing Research Institute, Chongqing 400037, China

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Received Date: October 10, 2016
Revised Date: February 28, 2017
Available Online: September 16, 2022

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Abstract

Abstract

In order to deeply probe the coal-gas migration rule in the roadway in the process of coal and gas outburst, experimental study was carried out on the migration rule of coal-gas flow in the process of outburst in the "H"-type roadway by using the self-developed simulation experiment device of coal and gas outburst dynamic effect. The results showed that about 60.453 kg of coal powder was blown out when the gas pressure was 0.35 MPa, the coal powder was mainly accumulated in the main roadway and presented a trapezoidal distribution, and there was almost no coal powder accumulation in the connection gate and branch entry; the gas pressure frequently fluctuated in a very short time (t< 1.5 s) at the same measuring point along the roadway and the peak value of gas pressure at different measuring points in the main roadway assummed an attenuated tendancy along the roadway. In addition, the existence of the shock wave was confirmed by experiments, and the propagation velocity of the shock wave in the main roadway was about 368.1 to 434.2 m/s.
- coal and gas outburst,
- two-phase flow,
- migration rule,
- gas pressure,
- shock wave

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References

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