Propagation law of shock waves and gas flow in cross roadway caused by coal and gas outburst |
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| Affiliation: | 1. School of Resource & Safety Engineering, China University of Mining & Technology, Beijing 100083, China;2. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454003, China;1. School of Safety Engineering, China University of Mining & Technology, Xuzhou 221116, China;2. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China;3. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, China;1. Center for Exploration of Energy and Matter, Indiana University, Bloomington, IN 47308, USA;2. Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA;3. Institute for Cyber-Enabled Research, Michigan State University, East Lansing, MI 48824, USA;4. XTD-6, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;1. Key Laboratory of Integrated Coal Exploitation and Gas Extraction, Anhui University of Science and Technology, Huainan 232001, China;2. School of Energy and Safety, Anhui University of Science and Technology, Huainan 232001, China;3. CSIRO Earth Science and Resource Engineering, Kenmore 4069, Australia;4. School of Mining Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China |
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| Abstract: | In order to study the propagation law of shock waves and gas flow during coal and gas outburst, we analyzed the formation process of outburst shock waves and gas flow and established the numerical simulation models of the roadways with 45° intersection and 135° intersection to simulate the propagation of outburst gas flow and the process of gas transport. Based on the analysis of the simulation results, we obtained the qualitative and quantitative conclusions on the characteristics and patterns of propagation and attenuation of outburst shock waves and gas flow. With the experimental models, we investigated the outburst shock waves and gas flow in the roadways with the similar structures to the simulated ones. According to the simulation results, when the angle between the driving roadway and the adjacent roadway increased, the sudden pressure variation range in adjacent roadway and the influencing scope of gas flow increased and the sudden pressure variation duration decreased. The intersection between the driving roadway and the adjacent roadway has no effect on airflow reversal induced by the shock waves and gas flow. |
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| Keywords: | Coal and gas outburst Shock waves and gas flow Propagation law Cross roadway |
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