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| SIMULATION AND TESTING STUDY ON OUTBURST PREVENTION MEASURE OF PRESSURE-RELIEF SLOTS |
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Abstract Base on simplified model，a mechanical model is established to simulate cutting pressure-relief slots. The numerical simulation on multiple schemes is conducted. Coal seam displacements，failure mode and reasonable technical scheme are obtained. A device of cutting pressure-relief slots is designed according to the results，and cutting test is conducted in mining survey. Simulation and cutting test results show that pressure- relief slots efficiently relieves stress and drains out gas and the reasonable shape of pressure-relief slots is two-side slots.
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Received: 19 September 2003
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LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
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