某村庄建筑物下条带开采设计及数值模拟分析
|
摘要
为安全开采某村庄建筑物下煤炭资源,根据该矿山地质条件和建筑物下煤炭开采要求,依据压力拱理论和三向应力法煤柱设计理论进行计算,得到28号煤层条带开采宽度和保留煤柱宽度,理论计算采出率46.2%,煤柱的安全系数1.89,可以承受上覆岩层施加的载荷,达到设计要求标准。根据理论计算结果和地质参数建立数值模型。模拟结果表明:地表下沉相对均匀,形成一个采空区中部凹陷的盆地,地面最大斜变形i=0.017mm/m,曲率K=-0.15×10-7/m,地表变形控制在Ⅰ级范围内,建筑物轻微损坏。通过模拟验证了该条带开采方案可以有效控制地表沉降和变形,降低开采对建筑损坏。
In order to solve the safety of mining under building of one village,based on mine geological situation and demand of mining under building,theory calculated by according pressure arch theory and three-dimensional stress coal pillar design theory,strip mining width and retain coal pillar width of 28 coal seam,recovery ratio was 46. 2%,safety coefficient of coal pillar was 1. 89,the loading of overlying strata could be supported,it meet the demand of design. Numerical model was built according theory results and geological parameters,the simulation results showed that surface subsidence was relative uniform,concave basin formed in the middle part of goaf,the maximal incline deformation of surface i = 0. 017mm/m,curve ratio K =-0. 15 × 10-7/m,surface deformation was controlled during I level,building damage slight. Surface subsidence and deformation could be controlled by the strip mining scheme according simulation,then the damage mining to building was decreased.
In order to solve the safety of mining under building of one village,based on mine geological situation and demand of mining under building,theory calculated by according pressure arch theory and three-dimensional stress coal pillar design theory,strip mining width and retain coal pillar width of 28 coal seam,recovery ratio was 46. 2%,safety coefficient of coal pillar was 1. 89,the loading of overlying strata could be supported,it meet the demand of design. Numerical model was built according theory results and geological parameters,the simulation results showed that surface subsidence was relative uniform,concave basin formed in the middle part of goaf,the maximal incline deformation of surface i = 0. 017mm/m,curve ratio K =-0. 15 × 10-7/m,surface deformation was controlled during I level,building damage slight. Surface subsidence and deformation could be controlled by the strip mining scheme according simulation,then the damage mining to building was decreased.
引文
[1]王军保,刘新荣,刘小军.开采沉陷动态预测模型[J].煤炭学报,2015,40(3):516-521.
[2]柴华彬,邹友峰,郭文兵.某矿村庄下煤柱开采方案研究[J].中国安全科学学报,2006,16(3):102-106.
[3]杨秀刚,王西伟,孙培永.村庄密集建筑物下条带开采参数设计及地表沉陷预计[J].山东煤炭科技,2011(2):179-181.
[4]郭增长,谢和平,王金庄.条带开采保留煤柱宽度和采出宽度与地表变形的关系[J].湘潭矿业学院学报,2003,18(2):13-17.
[5]司鑫炎,王文庆,邵文岗.沿空双巷合理煤柱宽度的数值模拟研究[J].采矿与安全工程学报,2012,29(2):215-219.
[6]肖福坤,申志亮,刘刚,等.循环加卸载中滞回环与弹塑性应变能关系研究[J].岩石力学与工程学报,2014,33(9):1791-1797.
[7]肖福坤,刘刚,申志亮.桃山90#煤层有效弹性能量释放速度研究[J].岩石力学与工程学报,2015,34(S2):4216-4225.
[8]丁易,张豫生.编制矿区总体规划应注意的几个问题[J].煤炭工程,2002,34(9):27-28.
[9]吴立新,王金庄,刘延安.建(构)筑物下压煤条带开采理论与实践[M].徐州:中国矿业大学出版社,1994.
[10]余学义,雷武林,高治洲,等.建筑物下宽条带开采方案研究[J].山东煤炭科技,2013(4):9-15.
[11]田振农,李世海,刘晓宇,等.三维块体离散元可变形计算方法研究[J].岩石力学与工程学报,2008,27(S1):2832-2840.
[12]LI S H,ZHAO M H,WANG Y N,et a1.A continuum-based discrete element method for continuous deformation and failure process[A].WCCM VI in Conjunction with APCOM’04[C].Beijing:[S.N.],2004.
[13]LI S H,ZHAO MH,WANG YN,et al.A new numerical method for DEM-Block and particlemodel[J].International Journal of Rock Mechanics and Mining Sciences,2004,41(S1).
[14]李映红.关于砖石结构建筑物破坏等级划分方法的讨论[J].矿山测量,1993,2(39):39-42.
[2]柴华彬,邹友峰,郭文兵.某矿村庄下煤柱开采方案研究[J].中国安全科学学报,2006,16(3):102-106.
[3]杨秀刚,王西伟,孙培永.村庄密集建筑物下条带开采参数设计及地表沉陷预计[J].山东煤炭科技,2011(2):179-181.
[4]郭增长,谢和平,王金庄.条带开采保留煤柱宽度和采出宽度与地表变形的关系[J].湘潭矿业学院学报,2003,18(2):13-17.
[5]司鑫炎,王文庆,邵文岗.沿空双巷合理煤柱宽度的数值模拟研究[J].采矿与安全工程学报,2012,29(2):215-219.
[6]肖福坤,申志亮,刘刚,等.循环加卸载中滞回环与弹塑性应变能关系研究[J].岩石力学与工程学报,2014,33(9):1791-1797.
[7]肖福坤,刘刚,申志亮.桃山90#煤层有效弹性能量释放速度研究[J].岩石力学与工程学报,2015,34(S2):4216-4225.
[8]丁易,张豫生.编制矿区总体规划应注意的几个问题[J].煤炭工程,2002,34(9):27-28.
[9]吴立新,王金庄,刘延安.建(构)筑物下压煤条带开采理论与实践[M].徐州:中国矿业大学出版社,1994.
[10]余学义,雷武林,高治洲,等.建筑物下宽条带开采方案研究[J].山东煤炭科技,2013(4):9-15.
[11]田振农,李世海,刘晓宇,等.三维块体离散元可变形计算方法研究[J].岩石力学与工程学报,2008,27(S1):2832-2840.
[12]LI S H,ZHAO M H,WANG Y N,et a1.A continuum-based discrete element method for continuous deformation and failure process[A].WCCM VI in Conjunction with APCOM’04[C].Beijing:[S.N.],2004.
[13]LI S H,ZHAO MH,WANG YN,et al.A new numerical method for DEM-Block and particlemodel[J].International Journal of Rock Mechanics and Mining Sciences,2004,41(S1).
[14]李映红.关于砖石结构建筑物破坏等级划分方法的讨论[J].矿山测量,1993,2(39):39-42.