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INFLUENTIAL LAWS ON STRATA AND GROUND MOVEMENT OF FACE-SEPARATED PILLARS AT A GREAT DEPTH
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Abstract A phenomenon of sub-critical mining subsidence appears in Jiaoping mining area in Shaanxi Province，which is under the conditions of great mining depth，thick seam and fully-mechanized top-coal caving. By similar material tests，the relationships of ground movement with the width of working face，the size of face-separated pillar，and the lithologic characteristic of overlying strata are studied. The main characters of rock masses movement are revealed. The achieved results prove that the face-separated pillars with a definite width can effectively control ground subsidence. It will provide references to those mines with similar conditions in Jiaoping mining area.
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Received: 13 May 2005
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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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