不同条件下带压开采煤层底板破坏深度研究
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摘要
为了预防工作面底板突水,保证矿井的安全生产,以梁北煤矿11141工作面为工程背景,采用数值模拟研究了带压开采工作面推进距离、埋深、煤层厚度、断层及断层位置等不同条件对底板破坏深度的影响。研究结果表明,工作面推进距离越大底板破坏深度越大,但推进至60m后,底板破坏深度保持不变趋于稳定;埋深越大底板破坏深度越大,400m埋深增加到800m埋深,每增加200m埋深,增大速度由50%降至12.25%,增大速度逐渐减小;煤层厚度越大,底板的破坏范围越大,对底板的破坏深度无影响;存在断层则底板破坏深度越大,底板最大破坏深度增加18.2%,断层位于初次来压影响范围内比位于周期来压影响范围内对底板破坏深度的影响要剧烈。
In order to prevent water-inrush from floor in working face and ensure the safety production of mine,taking the11141 working face of Liangbei Coal Mine as engineering background, numerical simulation was applied to study the influence of different conditions on the floor failure depth in coal mining above aquifer,such as advanced distance of working face,burial depth,thickness of coal seam,fault and fault location. The study results showed that: the greater the advanced distance of working face,the greater the floor failure depth is,but after the advanced distance reaches 60 m,the floor failure depth remains unchanged and tends to stabilize. The greater the burial depth,the greater the floor failure depth is,the buried depth increases from 400 m to 800 m,the growth rate decreases from 50% to 12. 25% with an increase of 200 m buried depth,the increasing speed gradually reduces. With the increase of coal seam thickness,the damage range of floor expends,while there is no influence on the floor failure depth. The floor failure depth is greater when there is a fault,the maximum failure depth of the floor increases by 18. 2%,it will be more severe for the impact of floor failure depth when the fault is located within the range of first weighting than that located within the range of periodic weighting.The research conclusion can offer references for the safe mining of working face in coal mining above aquifer.
In order to prevent water-inrush from floor in working face and ensure the safety production of mine,taking the11141 working face of Liangbei Coal Mine as engineering background, numerical simulation was applied to study the influence of different conditions on the floor failure depth in coal mining above aquifer,such as advanced distance of working face,burial depth,thickness of coal seam,fault and fault location. The study results showed that: the greater the advanced distance of working face,the greater the floor failure depth is,but after the advanced distance reaches 60 m,the floor failure depth remains unchanged and tends to stabilize. The greater the burial depth,the greater the floor failure depth is,the buried depth increases from 400 m to 800 m,the growth rate decreases from 50% to 12. 25% with an increase of 200 m buried depth,the increasing speed gradually reduces. With the increase of coal seam thickness,the damage range of floor expends,while there is no influence on the floor failure depth. The floor failure depth is greater when there is a fault,the maximum failure depth of the floor increases by 18. 2%,it will be more severe for the impact of floor failure depth when the fault is located within the range of first weighting than that located within the range of periodic weighting.The research conclusion can offer references for the safe mining of working face in coal mining above aquifer.
引文
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[11]张子良,徐万振,董检平.带压开采煤层底板破坏深度数值模拟研究[J].煤炭技术,2015,34(3):31-33.
[12]张周鑫,张缓缓.深部承压水上煤层开采底板的破坏特征[J].黑龙江科技大学学报,2015,25(1):11-15.
[13]牛新团,董梁,杨兴臣.赵家寨煤矿承压水开采底板破坏规律数值模拟研究[J].陕西煤炭,2012,31(6):40-42.
[14]张量,常聚才,李文敏.浅析底板岩层组合对底板破坏的影响[J].煤矿安全,2013,44(1):197-199.
[15]张文彬.综采放顶煤工作面底板应力及其破坏深度分析[J].煤炭科学技术,2010,38(12):17-21.
[16]潘锐,孟祥瑞,高召宁.底板承压水上断层突水的力学分析[J].矿业安全与环保,2013,40(4):11-15.
[2]孟祥瑞,徐铖辉,高召宁.采场底板应力分布及破坏机理[J].煤炭学报,2010,35(11):1832-1836.
[3]涂敏,缪协兴.承压水上开采底板失稳破坏规律研究[J].矿山压力与顶板管理,2005,22(2):26-28.
[4]冯磊,赵光明,孟祥瑞.承压水上采煤底板破坏规律的解析法计算及应用[J].煤炭科学技术,2011,39(9):13-16.
[5]黄震,姜振泉,孙强,等.深部巷道底板岩体渗透性高压水试验研究[J].岩土工程学报,2014,10(8):1535-1543.
[6]李福杰,武彩霞.带压开采下煤层底板破坏特征的数值模拟研究[J].煤炭工程,2012,44(7):81-84.
[7]董东林,洪益清,钱增江.基于FLAC3D的千米埋深的煤层底板影响深度模拟[J].煤炭工程,2010,42(2):71-74.
[8]徐瑞朋,姜振泉,段宏飞.承压水上开采煤层底板破坏深度数值模拟及实测研究[J].矿业安全与环保,2012,39(3):1-4.
[9]牟林,李功宇,姬亚东.晋城寺河矿下组煤底板带压开采条件的探讨[J].煤炭学报,2012,37(5):755-761.
[10]徐瑞朋,刘芙荣.赵庄井田带压开采煤层底板破坏特征数值模拟[J].煤矿安全,2011,42(7):168-170.
[11]张子良,徐万振,董检平.带压开采煤层底板破坏深度数值模拟研究[J].煤炭技术,2015,34(3):31-33.
[12]张周鑫,张缓缓.深部承压水上煤层开采底板的破坏特征[J].黑龙江科技大学学报,2015,25(1):11-15.
[13]牛新团,董梁,杨兴臣.赵家寨煤矿承压水开采底板破坏规律数值模拟研究[J].陕西煤炭,2012,31(6):40-42.
[14]张量,常聚才,李文敏.浅析底板岩层组合对底板破坏的影响[J].煤矿安全,2013,44(1):197-199.
[15]张文彬.综采放顶煤工作面底板应力及其破坏深度分析[J].煤炭科学技术,2010,38(12):17-21.
[16]潘锐,孟祥瑞,高召宁.底板承压水上断层突水的力学分析[J].矿业安全与环保,2013,40(4):11-15.