基于3D-σ有限元法的采场回采顺序优化
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摘要
结合某地下矿山工程实际,针对高程和平面2个维度的回采顺序,采用三维弹塑性有限元方法对回采过程中的应力场和位移场进行模拟计算,分析不同回采顺序的应力和位移状况,结果表明,在高程维度上从上而下开采时采场稳定性要优于由下而上开采;推荐在平面维度上采用"由内向外后退式回采"或"将矿体沿走向方向分为多段,在每一段内由内向外后退回采"的方案。研究结果对矿山的安全回采具有一定的指导意义。
Combined with the actual engineering conditions of an underground mine,aimed at the stoping scheme of two dimensions of elevation and horizontal,the stress field and displacement field in the stoping process were simulated by threedimensional elastic-plastic finite element method,and the stress and displacement conditions under different stoping sequences were analyzed.The results showed that the stability of stope was better when mining from top to bottom than that mining from bottom to top in elevation dimension.It was recommended to adopt the scheme of backward mining from the inside to the outside or dividing ore body into multiple sections along strike direction and backward mining from the inside to the outside in each section in horizontal dimension.The research results had a certain guiding significance for safe stoping in mines.
Combined with the actual engineering conditions of an underground mine,aimed at the stoping scheme of two dimensions of elevation and horizontal,the stress field and displacement field in the stoping process were simulated by threedimensional elastic-plastic finite element method,and the stress and displacement conditions under different stoping sequences were analyzed.The results showed that the stability of stope was better when mining from top to bottom than that mining from bottom to top in elevation dimension.It was recommended to adopt the scheme of backward mining from the inside to the outside or dividing ore body into multiple sections along strike direction and backward mining from the inside to the outside in each section in horizontal dimension.The research results had a certain guiding significance for safe stoping in mines.
引文
[1]尹仕湘,牛向东,侯克鹏.羊拉铜矿里农矿段采场回采顺序优化研究[J].现代矿业,2018,34(10):68-72+77.
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[6]韩斌,吴爱祥,刘同有,等.金川二矿区多中段机械化盘区回采顺序的数值模拟优化研究[J].矿冶工程,2004(2):4-7.
[7]李夕兵,刘志祥,彭康,等.金属矿滨海基岩开采岩石力学理论与实践[J].岩石力学与工程学报,2010,29(10):1945-1953.
[8]卢萍.深部采场结构参数及回采顺序优化研究[D].重庆:重庆大学,2008.
[9]周科平,古德生.遗传算法优化地下矿山开采顺序的应用研究[J].中国矿业,2001(5):52-56.
[10]高庆伟,孙嘉,郝显福.基于3D-σ有限元法的采场结构参数优化[J].黄金,2017,38(6):29-32.
[11]王世辉.夜长坪钼矿自然崩落法初始拉底面积的优化[J].矿业研究与开发,2010,30(3):12-14+44.
[2]陈晓博,郭霆,马玄恒,等.采场回采顺序数值模拟研究[J].采矿技术,2018,18(1):11-12+30.
[3]张德明,王浩,卞继伟,等.基于压力拱理论的矿块间回采顺序数值模拟[J].重庆大学学报,2018,41(10):78-89.
[4]焦文宇,徐必根,唐绍辉,等.充填体下矿体回采顺序数值模拟优化研究[J].矿业研究与开发,2012,32(5):9-11+23.
[5]李学锋,李向东,周爱民.凡口铅锌矿深部矿体开采顺序研究[J].金属矿山,2004(12):12-14+18.
[6]韩斌,吴爱祥,刘同有,等.金川二矿区多中段机械化盘区回采顺序的数值模拟优化研究[J].矿冶工程,2004(2):4-7.
[7]李夕兵,刘志祥,彭康,等.金属矿滨海基岩开采岩石力学理论与实践[J].岩石力学与工程学报,2010,29(10):1945-1953.
[8]卢萍.深部采场结构参数及回采顺序优化研究[D].重庆:重庆大学,2008.
[9]周科平,古德生.遗传算法优化地下矿山开采顺序的应用研究[J].中国矿业,2001(5):52-56.
[10]高庆伟,孙嘉,郝显福.基于3D-σ有限元法的采场结构参数优化[J].黄金,2017,38(6):29-32.
[11]王世辉.夜长坪钼矿自然崩落法初始拉底面积的优化[J].矿业研究与开发,2010,30(3):12-14+44.