多次重复上向开采叠加性影响研究
|
摘要
依托于河北唐山马城铁矿5号厚矿体上向充填法地下采矿工程。借助FLAC3D软件,对5号矿体上下采区同时上向充填开采过程中,地下采场围岩垂直及水平应力场的变化规律进行了分析研究。研究结果表明:在上下采区逐渐靠近的过程中,前期由于两采区间距离较远,相互扰动产生的叠加效果不明显。在开采至第3中段后叠加效果开始凸显,主要表现在上下采区间围岩应力出现应力集中区域,区域存在于上部采区已开采部分的边缘区域,之后随着开采工作的进行影响逐渐消除。
Taking the underground mining project of the No.5 ore body in Macheng iron mine in Tangshan as a background,based on FLAC3 D,the variation rules of vertical and horizontal stress fields of surrounding rocks in underground stope were analyzed and studied during the simultaneous upward filling mining process in the upper and lower mining areas.The results were concluded as follows.In the process of the upper and lower mining areas getting close to each other gradually,due to the long distance between the two mining areas in the early stage,the superposition effect caused by mutual disturbance was not obvious.After mining to the third middle section,the superposition effect started to be prominent,which was mainly manifested in the stress concentration area of the surrounding rock stress appearing between the upper and lower mining areas.And the area existed in the edge area of the part already mined in the upper mining area.The effects would be eliminated gradually with the mining.
Taking the underground mining project of the No.5 ore body in Macheng iron mine in Tangshan as a background,based on FLAC3 D,the variation rules of vertical and horizontal stress fields of surrounding rocks in underground stope were analyzed and studied during the simultaneous upward filling mining process in the upper and lower mining areas.The results were concluded as follows.In the process of the upper and lower mining areas getting close to each other gradually,due to the long distance between the two mining areas in the early stage,the superposition effect caused by mutual disturbance was not obvious.After mining to the third middle section,the superposition effect started to be prominent,which was mainly manifested in the stress concentration area of the surrounding rock stress appearing between the upper and lower mining areas.And the area existed in the edge area of the part already mined in the upper mining area.The effects would be eliminated gradually with the mining.
引文
[1]徐飞,何治良,褚洪涛,等.上向进路充填法在“三下”矿体开采中的应用[J].有色金属(矿山部分),2013(5):24-27.
[2]李哲,崔周全,徐前卫.上向分层充填法地下采矿模型试验与分析[J].中国矿业,2017(6):95-101.
[3]邓雪杰,张吉雄,黄鹏,等.特厚煤层上向分层充填开采顶板移动特征分析[J].煤炭学报,2015(5):994-1000.
[4]戴华阳,郭俊廷,易四海,等.特厚急倾斜煤层水平分层开采岩层及地表移动机理[J].煤炭学报,2013(7):1109-1115.
[5]戴华阳,易四海,郭俊廷,等.特厚急倾斜煤层水平分层开采地表移动预计方法[J].煤炭学报,2013(8):1305-1311.
[6]杨发军.煤矿分层开采时的矿压显现与顶板管理[J].企业科技与发展,2017(10):84-86.
[7]刘建功,赵家巍,李蒙蒙,等.煤矿充填开采连续曲形梁形成与岩层控制理论[J].煤炭学报,2016(2):383-391.
[8]刘建功.千米深井充填开采技术及装备研究与应用[J].煤炭科学技术,2013(9):58-61,65.
[2]李哲,崔周全,徐前卫.上向分层充填法地下采矿模型试验与分析[J].中国矿业,2017(6):95-101.
[3]邓雪杰,张吉雄,黄鹏,等.特厚煤层上向分层充填开采顶板移动特征分析[J].煤炭学报,2015(5):994-1000.
[4]戴华阳,郭俊廷,易四海,等.特厚急倾斜煤层水平分层开采岩层及地表移动机理[J].煤炭学报,2013(7):1109-1115.
[5]戴华阳,易四海,郭俊廷,等.特厚急倾斜煤层水平分层开采地表移动预计方法[J].煤炭学报,2013(8):1305-1311.
[6]杨发军.煤矿分层开采时的矿压显现与顶板管理[J].企业科技与发展,2017(10):84-86.
[7]刘建功,赵家巍,李蒙蒙,等.煤矿充填开采连续曲形梁形成与岩层控制理论[J].煤炭学报,2016(2):383-391.
[8]刘建功.千米深井充填开采技术及装备研究与应用[J].煤炭科学技术,2013(9):58-61,65.