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露天台阶下空区安全隔离层计算及稳定性分析
引用本文:刘希灵,尚俊龙,朱传明,何春林,赵兴,段瑜. 露天台阶下空区安全隔离层计算及稳定性分析[J]. 金属矿山, 2011, 40(5): 141-145
作者姓名:刘希灵  尚俊龙  朱传明  何春林  赵兴  段瑜
作者单位:1.中南大学;2.广东省大宝山矿业有限公司;3.湖南理工职业技术学院
基金项目:"十一五"国家科技支撑计划项目,湖南省教育厅科学研究项目,中南大学青年教师助推计划项目
摘    要:我国很多露天矿山存在开采境界下有空区危害的现象,安全隔离层厚度及稳定性分析是保证露天安全开采的关键,也是迫切需要解决的问题。以广东省大宝山露天矿开采为例,理论计算得出不同跨度下的安全隔离层厚度,再结合数值模拟软件建立二维空区模型进行模拟,比较理论计算和数值计算的结果。通过二者的比较最终得出不同跨度下最佳的安全隔离层厚度。最后就矿山具体存在的空区群,建立三维空区群模型进行稳定性分析。为露天开采境界下空区稳定性分析提供了一套系统的方法。

关 键 词:露天开采  空区  安全隔离层厚度  稳定性分析

Safety Isolation Layer Calculation and Stability Analysis of Cavity under Open Pit Bench
Liu Xiling,Shang Junlong,Zhu Chuanming,He Chunlin,Zhao Xing,Duan Yu. Safety Isolation Layer Calculation and Stability Analysis of Cavity under Open Pit Bench[J]. Metal Mine, 2011, 40(5): 141-145
Authors:Liu Xiling  Shang Junlong  Zhu Chuanming  He Chunlin  Zhao Xing  Duan Yu
Affiliation:1.Central South University;2.Guandong Dabaoshan Mining Co.Ltd.;3.Hunan Vocational Institute of Technology;
Abstract:There are many open pits in China threatened by cavities under open pit limit.The key to insure safe mining depends on the thickness of safety isolation layer between cavity and bench surface,and it needs to be solved urgently with the steps of bench blasting.Based on the present situation of Dabaoshan mine which is an open pit with lots of harmful cavities under open pit limit,the thickness of safety isolation layer under was calculated by using different theoretical methods,and the results simulated by 2D numerical method were compared with those theoretically calculated ones.The optimum thickness of safety isolation layer under different cavity span was obtained through comparison.Finally,an actual cavity group with three cavities under open-pit limit was modeled in 3D to calculate its stability.These provide a systematic stability analyzing method of cavity under open pit limit for the mine.
Keywords:Open-pit  Cavity  Thickness of safety isolation layer  Stability analysis
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