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| SUPPORT AND REINFORCEMENT TECHNIQUE FOR THE PROTECTED IRREGULAR PILLAR AND REMAINED GATEWAY ALONG FULLY MECHANIZED TOP CAVING MINING FACE |
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Abstract Based on the analysis of the pressure characteristics of the remained roadway along goaf，a comprehensive support system is designed and the reasonable parameters of the support system are determined by numerical simulation and analysis of rock broken zone. The supporting mechanism for different width of pillar protection is clarified. The control technique is proposed and employed through reinforcing irregular pillar in its two sides，installing a row of hydraulic prop and anchoring of roof strata which hangs the mesh and bolt rock mass as an auxiliary means to support the gateway. The reinforcing system forms a set of control system，which acts at the key position and in key period in clear mechanism to the mining influenced gateway. The site measurement shows good results of the support.
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Received: 20 October 2004
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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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