Pressure characteristics and dynamic response of coal mine refuge chamber with underground gas explosion |
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| Institution: | 1. School of Civil Engineering, Harbin Institute of Technology, No. 73, Huanghe Road, Nan''gang District, Harbin, Heilongjiang Province, China;2. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China;3. Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China;4. Shanghai Dragon Industrial Engineering Co. Ltd., Shanghai 200122, China;1. Department of Civil Engineering, Army Engineering University of PLA, Nanjing, Jiangsu 210007;2. Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211106;3. China Aerodynamics Research and Development Center, Mianyang, Sichuan 621000 |
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| Abstract: | Coal mine refuge chambers are new devices for coal mine safety which can provide basic survival conditions after gas explosion. In order to simulate the propagation of underground methane/air mixture blast wave, and check structural safety of coal mine mobile refuge chamber, an underground tunnel model and a refuge chamber model have been established based on explicit nonlinear dynamic ANSYS/LS-DYNA 970 program. Results show that the reflected wave pressure on the impact surface was about two times higher than that on the incident one. The relationship between the pressure fields of the chamber was analyzed. The maximum pressure of gas explosion reached about 0.71 MPa, and the pulse width was 360 ms. The maximum absolute displacement and stress occurs at the main door center and the connection of stiffeners and the front plate, respectively. The entire coal mine mobile refuge chamber was in elastic state and its strength and stiffness meet the safety requirements. The cabin door, the front plate and the connecting flange at cabin back as well as the stiffeners on each side were the most critical components. Suggestions were put forward for the refuge chamber. |
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| Keywords: | Refuge chamber Structure safety Shock wave Dynamic response Gas explosion |
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