基于数值模拟的露天-地下联合开采隔离层稳定性分析
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摘要
在永平铜矿,由于露采速度远大于地采速度,目前该矿的露天坑底预留隔离层的厚度不断减小。为了确保矿山回采安全,采用CAD-3DMine-Flac3D等多软件耦合建模的手段,对现有隔离层的稳定性进行动态模拟和对比分析。研究结果表明,虽然目前隔离层厚度已低于有关规程要求的最小值,但爆破振动和矿体回采对隔离层影响很小,隔离层基本没有发生贯穿破坏,尚处于稳定状态;同时通过应力、应变及塑性区的变化分析,找出了稳定性薄弱环节,为矿山下一步排产决策提供了必要的技术支撑。
Since the rate of open mining is much higher than that of underground mining,the thickness of the isolation layer reserved at the bottom of Yongping copper mine is decreasing at present.In order to ensure the safety of mining at present stage,with the means of multi-software coupled modeling,including CAD,3 D Mine,FLAC~(3D)and so on,the stability of existing isolation layer was dynamically simulated and comparatively analyzed.The results showed that,the blasting vibration and mining of ore body had little effect on the isolation layer although the current thickness was lower than the minimum required by relevant regulations.The isolation layer was basically in a stable state without penetrating failure.Moreover,the weak points in stability were determined by analyzing the change of stress,strain and plastic zone.The study provided a necessary technical support for further decision of mine production scheduling.
Since the rate of open mining is much higher than that of underground mining,the thickness of the isolation layer reserved at the bottom of Yongping copper mine is decreasing at present.In order to ensure the safety of mining at present stage,with the means of multi-software coupled modeling,including CAD,3 D Mine,FLAC~(3D)and so on,the stability of existing isolation layer was dynamically simulated and comparatively analyzed.The results showed that,the blasting vibration and mining of ore body had little effect on the isolation layer although the current thickness was lower than the minimum required by relevant regulations.The isolation layer was basically in a stable state without penetrating failure.Moreover,the weak points in stability were determined by analyzing the change of stress,strain and plastic zone.The study provided a necessary technical support for further decision of mine production scheduling.
引文
[1]刘希灵,李夕兵,宫凤强,等.露天开采台阶面下伏空区安全隔离层厚度及声发射监测[J].岩石力学与工程学报,2012,31(1):3357-3362.
[2]张开新,王平,裴明松,等.程潮铁矿联合开采采场的地压分布与控制[J].金属矿山,2016(5):11-14.
[3]陆广,罗周全,刘晓明,等.露天转地下开采隔离层厚度安全分析[J].采矿与安全工程学报,2011,28(1):132-137.
[4]刘涛,唐礼忠,郭生茂.矿山隔离矿柱回采稳定性分析及开采方案研究[J].金属矿山,2014(4):154-159.
[5]张访问.马坑铁矿隔离层矿柱安全厚度的分析和研究[J].矿业研究与开发,2016,36(5):83-85.
[6]李真,褚洪涛,王宇.露天开采下伏采空区顶板控制研究[J].西安科技大学学报,2015(3):313-319.
[7]王宇,李真,谭富生.基于FLAC3D的空区下矿体回采隔离保安矿柱厚度研究[J].矿业研究与开发,2016,36(10):103-108.
[8]刁虎.某矿山露天地下联合开采相互影响数值模拟分析[J].金属矿山,2012(1):22-27.
[9]陈清运,蔡嗣经,明士祥.地下开采地表变形数值模拟研究[J].金属矿山,2004(6):19-21.
[2]张开新,王平,裴明松,等.程潮铁矿联合开采采场的地压分布与控制[J].金属矿山,2016(5):11-14.
[3]陆广,罗周全,刘晓明,等.露天转地下开采隔离层厚度安全分析[J].采矿与安全工程学报,2011,28(1):132-137.
[4]刘涛,唐礼忠,郭生茂.矿山隔离矿柱回采稳定性分析及开采方案研究[J].金属矿山,2014(4):154-159.
[5]张访问.马坑铁矿隔离层矿柱安全厚度的分析和研究[J].矿业研究与开发,2016,36(5):83-85.
[6]李真,褚洪涛,王宇.露天开采下伏采空区顶板控制研究[J].西安科技大学学报,2015(3):313-319.
[7]王宇,李真,谭富生.基于FLAC3D的空区下矿体回采隔离保安矿柱厚度研究[J].矿业研究与开发,2016,36(10):103-108.
[8]刁虎.某矿山露天地下联合开采相互影响数值模拟分析[J].金属矿山,2012(1):22-27.
[9]陈清运,蔡嗣经,明士祥.地下开采地表变形数值模拟研究[J].金属矿山,2004(6):19-21.