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Abstract As the easily mining resources are being increasingly depleted，it is very urgent to mine coal under buildings，water-bodies and railways. The rational exploitation of coal resource under the premise of the security of constructions and infrastructures etc. is a major practical problem. Taking Zhengjiazhuang colliery for example，based on former research results，a 3D geological model in the study area has been firstly established by the ROCK MODEL software which is developed by authors. Secondly，several mining schemes have been analyzed by probability integral method and numerical simulation method；and the optimal mining scheme is chosen on the basis of synthetical factors such as protection of cultural relics，geological conditions and mining designs etc.. Then the impacts of “two-zone” developing height overlying the mining face，the faults and mining fractures on the drainage of shallow aquifer near the surface and survival of famous and ancient trees have been analyzed by synthetical methods. Finally，specific protection measures are proposed.
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Received: 03 December 2007
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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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