弓长岭铁矿高落差端部矿体安全开采技术研究
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摘要
弓长岭铁矿二矿区的中央区地下回采工作面与东南区露天采场的落差高达700 m,且在-220 m水平由中央区向东南区扩采了200 m,因此2区衔接部位有约500 m长的高落差端部矿体处于移动带内,未纳入露天设计开采范围。通过分析端部矿体的赋存条件及岩移危害形式,发现只有地表塌陷坑边壁的片落对端部矿体的开采构成安全危害,据此,运用临界散体柱理论,提出了向地表塌陷坑充填废石的措施,以控制塌陷坑边壁片落,并制定了沿塌陷坑边帮与轴线方向协调排岩的工艺方法,以保障排岩的施工安全。在此基础上,东南区露天采场西侧的端部矿体可以进行开采,可由东南区露天采场向西扩采完成。
The drop between underground mining face of central area and open pit of southeast area is about 700 m in Gongchangling second mining area,and in-220 m level the stope face is expanded 200 m from central area to southeast area,so about 500 m ore body which locates in the convergence site of the two mining area can`t be mined for locating in movement range.By analyzing orebody that at the end of collapse pit occurrence conditions and hazards form of rock movement,only the side wall chipping of collapse pit hazards the safety of orebody that at the end of collapse pit mining,and based on the theory of critical granular column,a measure that filling the existing collapse pit with waste rock to control chipping is proposed.And developed a scheme that to dump rock along the axial direction and along collapse pit edge direction cooperatively to ensure safety.On this basis,the orebody that at the end of collapse pit can be be mined with open-pit mining method by expand the open pit of southeast area.
The drop between underground mining face of central area and open pit of southeast area is about 700 m in Gongchangling second mining area,and in-220 m level the stope face is expanded 200 m from central area to southeast area,so about 500 m ore body which locates in the convergence site of the two mining area can`t be mined for locating in movement range.By analyzing orebody that at the end of collapse pit occurrence conditions and hazards form of rock movement,only the side wall chipping of collapse pit hazards the safety of orebody that at the end of collapse pit mining,and based on the theory of critical granular column,a measure that filling the existing collapse pit with waste rock to control chipping is proposed.And developed a scheme that to dump rock along the axial direction and along collapse pit edge direction cooperatively to ensure safety.On this basis,the orebody that at the end of collapse pit can be be mined with open-pit mining method by expand the open pit of southeast area.
引文
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[2]王燕,任凤玉,等.弓长岭铁矿沿塌陷坑排岩的安全可靠度研究[C]∥中国采选技术十年回顾与展望.北京:冶金工业出版社,2012:699-702.Wang Yan,Ren Fengyu,et al.Study on safety reliability of pumping rocks along the collapse pit in Gongchangling iron ore[C]∥China Mining Technology in Ten Years:Retrospect and Prospect.Beijing:Metallurgical Industry Press,2012:699-702.
[3]李海英,任凤玉,陈晓云,等.深部开采陷落范围的预测与控制方法[J].东北大学学报:自然科学版,2012,33(11):1624-1627.Li Haiyin,Ren Fengyu,Chen Xiaoyun,et al.The method for predicting and controlling the range of surface subsidence during deep orebody mining[J].Journal of Northeastern University:Natural Science,2012,33(11):1624-1627.
[4]邹友峰,邓喀中,马伟民.矿山开采沉陷工程[M].徐州:中国矿业大学出版社,2003:154-203.Zou Youfeng,Deng Kazhong,Ma Weimin.Mining Subsidence Engineering[M].Xuzhou:China University of Mining&Technology Press,2003:154-203.
[5]王军,梁亚林.矿山岩移和塌陷的预防与控制[J].矿业快报,2008(5):56-58.Wang Jun,Liang Yalin.Mine rock movement and subsidence prevention and control[J].Express Information of Mining Industry,2008(5):56-58.
[6]全桂光.矿山采空区地表塌陷范围预测探讨[J].有色矿冶,2008,24(5):11-12.Quan Guiguang.Mine mined-out area of surface subsidence area forecast[J].Non-ferrous Mining and Metallurgy,2008,24(5):11-12.
[7]郭文兵,邓碦中,邹友峰.岩层与地表移动控制技术的研究现状及展望[J].中国安全科学学报,2005,15(1):6-9.Guo Wenbing,Deng Kazhong,Zou Youfeng.Research progress and prospect of the control technology for surface and overlying strata subsidence[J].China Safety Science Journal,2005,15(1):6-9.