Experimental Research on the Impactive Dynamic Effect of Gas-Pulverized Coal of Coal and Gas Outburst

被引:27
|
作者
Sun, Haitao [1 ,2 ]
Cao, Jie [1 ,2 ]
Li, Minghui [3 ]
Zhao, Xusheng [1 ,2 ]
Dai, Linchao [1 ,2 ]
Sun, Dongling [1 ,2 ]
Wang, Bo [1 ,2 ]
Zhai, Boning [1 ,2 ]
机构
[1] State Key Lab Gas Disaster Detecting Preventing &, Chongqing 400037, Peoples R China
[2] Chongqing Res Inst, Gas Res Branch, China Coal Technol Engn Grp, Chongqing 400037, Peoples R China
[3] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400030, Peoples R China
基金
中国国家自然科学基金;
关键词
coal and gas outburst; laboratory simulation experiment; two-phase flow of a mixture of pulverized coal and gas; shock wave; propagation model; DESORPTION; MINE; PARAMETERS; APPARATUS; MECHANISM; METHANE; HAZARD; STAGE; FLOW;
D O I
10.3390/en11040797
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
Coal and gas outburst is one of the major serious natural disasters during underground coal, and the shock air flow produced by outburst has a huge threat on the mine safety. In order to study the two-phase flow of a mixture of pulverized coal and gas of a mixture of pulverized coal and gas migration properties and its shock effect during the process of coal and gas outburst, the coal samples of the outburst coal seam in Yuyang Coal Mine, Chongqing, China were selected as the experimental subjects. By using the self-developed coal and gas outburst simulation test device, we simulated the law of two-phase flow of a mixture of pulverized coal and gas in the roadway network where outburst happened. The results showed that the air in the roadway around the outburst port is disturbed by the shock wave, where the pressure and temperature are abruptly changed. For the initial gas pressure of 0.35 MPa, the air pressure in different locations of the roadway fluctuated and eventually remain stable, and the overpressure of the outburst shock wave was about 20 similar to 35 kPa. The overpressure in the main roadway and the distance from the outburst port showed a decreasing trend. The highest value of temperature in the roadway increased by 0.25 degrees C and the highest value of gas concentration reached 38.12% during the experiment. With the action of shock air flow, the pulverized coal transportation in the roadway could be roughly divided into three stages, which are the accelerated movement stage, decelerated movement stage and the particle settling stage respectively. Total of 180.7 kg pulverized coal of outburst in this experiment were erupted, and most of them were accumulated in the main roadway. Through the analysis of the law of outburst shock wave propagation, a shock wave propagation model considering gas desorption efficiency was established. The relationships of shock wave overpressure and outburst intensity, gas desorption rate, initial gas pressure, cross section and distance of the roadway were obtained, which can provide a reference for the protection of coal and gas outburst and control of catastrophic ventilation.
引用
收藏
页数:15
相关论文
共 50 条
  • [41] Research on avoiding outburst by gas dialysis of coal seam
    Zhao, Yu-Qi
    Qi, Li-Ming
    Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering, 2009, 26 (01): : 110 - 113
  • [42] Research on Early Warning System For Coal and Gas Outburst
    Liu Xianglan
    Zhao Xusheng
    Yang Huiming
    Dong Guigang
    2010 INTERNATIONAL CONFERENCE ON MINE HAZARDS PREVENTION AND CONTROL, 2010, 12 : 560 - +
  • [43] Experimental study of coal and gas outburst processes influenced by gas pressure, ground stress and coal properties
    Ou, Jianchun
    Wang, Enyuan
    Li, Zhonghui
    Li, Nan
    Liu, He
    Wang, Xinyu
    FRONTIERS IN EARTH SCIENCE, 2023, 11
  • [44] Experimental Study of Coal–Gas Outburst: Insights from Coal–Rock Structure, Gas Pressure and Adsorptivity
    Feng Du
    Kai Wang
    Xiang Zhang
    Chengpeng Xin
    Longyong Shu
    Gongda Wang
    Natural Resources Research, 2020, 29 : 2481 - 2493
  • [45] Research on the amount of safely mineable coal in mines susceptible to coal and gas outburst
    Wang, Hai-Feng
    Cheng, Yuan-Ping
    Yu, Qi-Xiang
    Zhou, Zong-Yong
    Zhou, Hong-Xing
    Liu, Hong-Yong
    Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology, 2008, 37 (02): : 236 - 240
  • [46] Experimental Study on Coal and Gas Outburst Risk in Strong Outburst Coal Under Different Moisture Content
    Lu, Zhuang
    Wang, Liang
    Lv, Mingzhe
    Lei, Yang
    Wang, Hao
    Liu, Qingquan
    FRONTIERS IN EARTH SCIENCE, 2022, 10
  • [47] Study on Chaos Characteristics of Gas Dynamic Emission Preceding Coal and Gas Outburst
    He Jun
    Chen Xinsheng
    Ouyang Wenfeng
    PROGRESS IN SAFETY SCIENCE AND TECHNOLOGY, VOL VII, PTS A AND B, 2008, 7 : 1676 - 1679
  • [48] The tectonic coal and its effects on coal and gas outburst
    Hao, JS
    Zheng, J
    PROCEEDINGS IN MINING SCIENCE AND SAFETY TECHNOLOGY, 2002, : 362 - 364
  • [49] The tectonic coal and its effects on coal and gas outburst
    Hao, Jisheng
    Zheng, Jie
    Proceedings in Mining Science and Safety Technology, 2002, : 362 - 364
  • [50] Study on time-effect of coal and gas outburst
    Baoxian, Liu
    Deguo, Xiong
    Xufu, Xian
    Progress in Mining Science and Safety Technology, Pts A and B, 2007, : 1575 - 1580