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STUDY OF GROUND PRESSURE TESTING AND SUPPORT TECHNIQUE IN MINING OF BROKEN ORE BODY IN
LUZHONG MINES
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Abstract Because of the complicated geological conditions，fragmentation of ore and rock mass，developed underground water，Luzhong iron mine is one of difficult excavation mine in China. According to the conditions of the very broken orebody in Luzhong mines，so they are difficult to be mined safely；the dynamic monitoring of the law of stope ground-pressure was carried out. The change of stope ground-pressure was measured by using the borehole strain sensor；and the electronic digitally-displayed convergence indicator was used to measure deformations of surrounding rock so as to obtain a general law of the ground pressure. This technique provides a scientific basis for selecting rational mining method and ground-pressure control measures.
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Received: 10 January 2008
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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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