急倾斜矿体不同开采时序对上覆岩体变形的影响
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摘要
通过对露天转地下急倾斜矿体不同开采时序关系的数值模拟分析,得出从下至上顺序开采产生的位移量和破坏范围明显小于从上到下顺序开采,其中地表最大沉降与位移减小了20%以上。深部坡外区矿体开采产生的岩体移动方向与露天边坡滑移方向相反,减小了露天边坡滑移量,增大了山体滑坡的概率。因此,加强了矿山开采分区方案的优化设计。
According to the numerical simulation analysis of different mining sequence relationship of steeply inclined orebody from surface to underground,it is concluded that the destruction and displacement from bottom to top extraction are much smaller than the opposite mining sequence,the maximum ground settlement and displacement reduces more than 20%.The moving direction of deep orebody mining of rock mass slope outside the area is contrary to the slope sliding,which reduces the slope slip,increases the probability of landslides.Once causing a landslide,it is easy to block natural water channel and induce the secondary disasters; therefore,it is necessary to strengthen the mining partition optimization design.
According to the numerical simulation analysis of different mining sequence relationship of steeply inclined orebody from surface to underground,it is concluded that the destruction and displacement from bottom to top extraction are much smaller than the opposite mining sequence,the maximum ground settlement and displacement reduces more than 20%.The moving direction of deep orebody mining of rock mass slope outside the area is contrary to the slope sliding,which reduces the slope slip,increases the probability of landslides.Once causing a landslide,it is easy to block natural water channel and induce the secondary disasters; therefore,it is necessary to strengthen the mining partition optimization design.
引文
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[3]孙世国,杨素珍,秦四清.矿山复合开采边坡岩体变形规律[M].北京:地震出版社,2000.
[4]王文忠,冉启发,孙世国,等.露天边坡与山体边坡复合体稳定性分析[M].北京:冶金工业出版社,2001.
[5]王文忠,冉启发,孙世国.高陡软岩边坡控制与智能匹配优化设计[M].北京:科学出版社,2008.
[6]孙世国.典型排土场边坡稳定性控制技术[M].北京:冶金工业出版社,2011.
[7]Bye A R,Bell F G.Stability assessment and slope design at sand sloot open pit,South Africa[J].International Journal of Rock Mechanics and Mechanics and Mining Sciences,2001,38(3):449-446.
[8]Rose N D,Hunger O.Forecasting potential rock slope failure in open pit mines using the inverse-velocity method[J].International Journal of Rock Mechanics and Mining Science,2007,44(2):308-320.
[9]Zhao Xingdong,Li Lianchong,Tang Chunan,et al.Stability of boundary pillars in transition from open pit to underground mining[J].Journal of Central south University,2012,19(11):3256-3265.
[10]Wang Jiachen,Tan Wenhui,Feng Shiwei,et al.Reliability analysis of an open pit coal mine slope[J].International Journal of Rock Mechanics and Mining Sciences,2000,37(4):715-721.
[11]He M C,Feng J L,Sun X M.Stability evaluation and optimal excavated design of rock slope at An tai bao open pit coal mine[J].International Journal of Rock Mechanics and Mining Sciences,2008,45(3):289-302.
[12]Singh T N,Singh D P.Slope behaviour in an opencast mine over old underground voids[J].International Journal of Mining,Reclamation and Environment,1991,5(4):195-201.
[13]周国铨,崔继宪,刘广容,等.建筑物下采煤[M].北京:煤炭工业出版社,1983.
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