南温河钨矿矿柱回采方案设计与稳定性研究
|
摘要
矿柱的安全回采是我国金属矿山面临的紧迫问题,直接关系到矿山的可持续发展,在维持矿柱采场稳定的前提下提高其回采率,是残留矿柱安全开采急需解决的问题。以南温河钨矿矿柱回收为研究对象,根据前期现场调研、工程现场监测试验、CMS探测,结合FLAC~(3D)数值模拟等手段,揭示全面法矿柱群应力分布规律,分析了人工矿柱结构参数对房柱法采场稳定性的影响。研究表明:用人工假柱置换原生矿柱后,人工假柱中垂直应力为5～10MPa,水平应力0.1～1MPa,应力值相对较小,且分布较为均匀,未出现应力集中现象;顶板最大下沉量为10.7 mm,底板最大鼓起量为10mm,较原先仅仅依靠矿柱自稳的情况,稳定性得到了有效改善。研究结果为矿山矿柱回收方案选择提供了理论参考,具有重要的工程意义。
The safe recovery of pillars is an urgent problem of metal mines in China,which directly related to the sustainable development of mines.Improving the recovery rate under the premise of maintaining the stability of pillars is an urgent problem for the safe recovery of residual pillars.In this paper,the recovery of the pillars in Nanwenhe Tungsten Mine was taken as the research object.According to the previous site investigation,engineering site monitoring test,CMS detection,FLAC3 D numerical simulation and other means,the stress distribution law of the pillar group mined by comprehensive method was revealed,and the influence of artificial pillar structure parameters on stope stability was analyzed.The research showed that after replacing the original pillars with artificial pillars,the vertical stress of the artificial pillars was 5～10 MPa,the horizontal stress was 0.1～1 MPa,the stress value was relatively small,and the distribution was relatively uniform,no stress concentration occurred.The maximum subsidence of the roof was 10.7 mm,and the maximum bulge of the floor was 10 mm,which were effectively improved compared with the original situation that only depended on the pillars self-stability.The results provided a theoretical reference for the selection of pillar recovery schemes and had an important engineering significance.
The safe recovery of pillars is an urgent problem of metal mines in China,which directly related to the sustainable development of mines.Improving the recovery rate under the premise of maintaining the stability of pillars is an urgent problem for the safe recovery of residual pillars.In this paper,the recovery of the pillars in Nanwenhe Tungsten Mine was taken as the research object.According to the previous site investigation,engineering site monitoring test,CMS detection,FLAC3 D numerical simulation and other means,the stress distribution law of the pillar group mined by comprehensive method was revealed,and the influence of artificial pillar structure parameters on stope stability was analyzed.The research showed that after replacing the original pillars with artificial pillars,the vertical stress of the artificial pillars was 5～10 MPa,the horizontal stress was 0.1～1 MPa,the stress value was relatively small,and the distribution was relatively uniform,no stress concentration occurred.The maximum subsidence of the roof was 10.7 mm,and the maximum bulge of the floor was 10 mm,which were effectively improved compared with the original situation that only depended on the pillars self-stability.The results provided a theoretical reference for the selection of pillar recovery schemes and had an important engineering significance.
引文
[1]蒋深竹.广西大新锰矿缓倾斜薄矿体房柱法采矿探实[J].中国锰业,2018,36(5):151-154.
[2]张华辉,梅国栋.缓倾斜薄钨矿脉矿柱回采方案探讨[J].有色金属(矿山部分),2017,69(6):21-24.
[3]王庆军,孙国飞,张军胜,等.矿柱置换技术在金凤公司的应用[J].黄金,2009,30(7):27-32.
[4]赵奎,胡慧明,王晓军,等.某金矿房柱法采场人工矿柱参数选取[J].采矿技术,2011,11(2):15-17.
[5]汪洪涛,隋少飞.冬瓜山铜矿隔离矿柱开采方法及稳定性分析[J].金属矿山,2013(3):39-41.
[6]徐恒,王贻明,吴爱祥,等.基于综合指数法的深部开采隔离矿柱失稳危险性评价[J].有色金属工程,2018,8(1):98-104.
[7]董鑫,吴锋,彭剑平,赵革.夏甸金矿崩落空区隔离矿柱开采研究[J].矿业研究与开发,2018,38(9):1-5.
[8]张雯,郭进平,张卫斌,等.大型残留矿柱回采时采空区处理方案研究[J].金属矿山,2012(1):10-12+54.
[9]王进,王晓军.基于FLAC3D的房柱法采场人工柱参优化模拟[J].中国钨业,2017,32(5):32-36.
[10]何标庆.基于FLAC3D的大型采空区群稳定性数值模拟分析[J].中国矿业,2018,27(7):99-102.
[11]张君鹏,王启健,夏自锋.大尹格庄金矿深部采场矿柱稳定性分析与参数优化[J].有色金属(矿山部分),2017,69(1):10-13.
[12]张培波,张宝,李永辉.矿柱强度理论在群采空区稳定性分析中的应用[J].湖南有色金属,2017,33(1):1-3.
[2]张华辉,梅国栋.缓倾斜薄钨矿脉矿柱回采方案探讨[J].有色金属(矿山部分),2017,69(6):21-24.
[3]王庆军,孙国飞,张军胜,等.矿柱置换技术在金凤公司的应用[J].黄金,2009,30(7):27-32.
[4]赵奎,胡慧明,王晓军,等.某金矿房柱法采场人工矿柱参数选取[J].采矿技术,2011,11(2):15-17.
[5]汪洪涛,隋少飞.冬瓜山铜矿隔离矿柱开采方法及稳定性分析[J].金属矿山,2013(3):39-41.
[6]徐恒,王贻明,吴爱祥,等.基于综合指数法的深部开采隔离矿柱失稳危险性评价[J].有色金属工程,2018,8(1):98-104.
[7]董鑫,吴锋,彭剑平,赵革.夏甸金矿崩落空区隔离矿柱开采研究[J].矿业研究与开发,2018,38(9):1-5.
[8]张雯,郭进平,张卫斌,等.大型残留矿柱回采时采空区处理方案研究[J].金属矿山,2012(1):10-12+54.
[9]王进,王晓军.基于FLAC3D的房柱法采场人工柱参优化模拟[J].中国钨业,2017,32(5):32-36.
[10]何标庆.基于FLAC3D的大型采空区群稳定性数值模拟分析[J].中国矿业,2018,27(7):99-102.
[11]张君鹏,王启健,夏自锋.大尹格庄金矿深部采场矿柱稳定性分析与参数优化[J].有色金属(矿山部分),2017,69(1):10-13.
[12]张培波,张宝,李永辉.矿柱强度理论在群采空区稳定性分析中的应用[J].湖南有色金属,2017,33(1):1-3.