摘要
长坡矿区岩体稳定性计算分析是中国有色金属工业总公司重点科研项目“长坡锡矿地压活动规律及空区处理技术研究”的一个重要方面。本文对这一部分作了较为详细的论述。文中用二维及三维弹塑性有限元程序对矿区岩体稳定性进行了计算分析,结果表明:对于厚大急倾斜矿体,水平薄板型矿柱(顶、底柱)作用较垂直矿柱(间柱)的作用要小;一次开挖比多次开挖的应力条件要好;同一中段自上而下的开采顺序优于自下而上的开采顺序;相邻矿体开采自左向右优于自右向左的开采。
This paper discusses in detail the calculatiou and analysis of rockmass stability in Changpo Mining District, which is an important part of the CNNC (China National Non-ferrous Corporation) key scientific research project titled The Ground Pressure Active Patten And Mined-Out Area Treatment Technology Research In Chargpo Tin Mine, By using two-dimens- ional and three-dimensional elastoplastic finite element programmes, the results of calculation and analysis showe that: (1) for large and thick steeply dip orebody, horizontal thin plate pillars (top and bettom pillars) will play a less significant role than vertical pillar; (2) single excavation provides better stress conditions than multi-excavations; (3) for a sublevel, the downward mining sequence is superior over the upward; and (4) for the adjacent orebodies, the rightward mining sequence is better than the left-ward.
关键词
矿山地压
弹塑性
稳定性
岩体
Mine ground pressure,Finite element method, Elastoplasticity, Stability
