基于钻孔成像技术与数值模拟的“两带”高度研究
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摘要
为了探究在顶板为厚松散层薄基岩条件下上分层开采后的垮落带和导水断裂带("两带")的高度,采用钻孔成像技术对采动后的薄基岩变形破坏特征进行现场实测。通过对比不同深度位置的钻孔成像和该孔煤层顶板埋深,获得了开采过后的垮落带以及导水断裂带的高度。在此基础上,建立了该工作面的工程地质模型,运用FLAC3D数值模拟软件,模拟该工作面上分层开采,得到了"两带"高度发育特征,并与实测结果进行对比。
To study the height of caving zone and fractured zone(two zones) after upper slicing mining under the condition that the roof is thick loose and thin bedrock, borehole imaging technology is used to measure the deformation and failure characteristics of thin bedrock after mining. By comparing the borehole imaging at different depths and the roof burial depth of the coal seam,the height of caving zone and water conducting fracture zone after mining is obtained. On this basis, the engineering geological model of the working face is established, and the stratified mining on the working face is simulated by FLAC3 Dnumerical simulation software. The height development characteristics of the"two zones"are obtained and compared with the measured results.
To study the height of caving zone and fractured zone(two zones) after upper slicing mining under the condition that the roof is thick loose and thin bedrock, borehole imaging technology is used to measure the deformation and failure characteristics of thin bedrock after mining. By comparing the borehole imaging at different depths and the roof burial depth of the coal seam,the height of caving zone and water conducting fracture zone after mining is obtained. On this basis, the engineering geological model of the working face is established, and the stratified mining on the working face is simulated by FLAC3 Dnumerical simulation software. The height development characteristics of the"two zones"are obtained and compared with the measured results.
引文
[1]张永刚,李运江,刘延欣,等.厚松散层薄基岩下煤柱留设类型转变研究[J].煤炭技术,2017,36(5):63.
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[7]Feng SJ,Sun SG,Lv YG,et al.Research on the height of water flowing fractured zone of fully mechanized caving mining in extra-thick coal seam[J].Procedia Engineering,2011,26:466-471.
[8]Hang Y,Zhang GL,Yang GY.Numerical simulation of dewatering thick unconsolidated aquifers for safety of underground coal mining[J].Mining Science and Technology,2009,19(3):312-316.
[9]王敏,王凯,侯振功.钻孔成像方法在巷道围岩松动圈测试中的应用研究[J].矿业安全与环保,2012,39(5):31-33.
[10]马新平.三维可视化钻孔成像技术在煤矿井下钻探中的应用研究[J].河北能源职业技术学院学报,2015(4):68-71.
[11]王川婴,LAW K Tim.钻孔摄像技术的发展与现状[J].岩石力学与工程学报,2005,24(19):3440.
[12]Liang MX,Peng SP,Du WF,et al.Tectonic stress estimation from ultrasonic borehole image logs in a coal bed methane well,northeastern Qinshui Basin,China[J].Journal of Natural Gas Science and Engineering,2018,52:44-58.
[13]杨俊哲.7 m大采高综采工作面导水断裂带发育规律研究[J].煤炭科学技术,2016,44(1):61-66.
[14]王川婴,胡培良,孙卫春.基于钻孔摄像技术的岩体完整性评价方法[J].岩土力学,2010,31(4):1326.
[15]李卫明,张彬,石磊,等.基于钻孔摄像技术的水平孔节理裂隙发育特征研究[J].勘察科学技术,2017(3):27-31.
[2]吴云,李运江,孟昭河,等.薄基岩顶分层开采“两带”发育高度研究[J].煤炭技术,2017,36(6):61-63.
[3]曹思文,刘瑞新,张振国.杨村煤矿318工作面特厚煤层开采“两带”高度研究[J].能源技术与管理,2017,42(4):111-113.
[4]徐莉军.钻孔成像仪在掘进工作面的应用[J].机械管理开发,2018(7):120-121.
[5]杨勇,孙前芳.高头窑煤矿2-3煤层“两带”高度观测及水体下安全开采[J].煤矿安全,2015,46(12):73.
[6]张军,王建鹏.采动覆岩“三带”高度相似模拟及实证研究[J].采矿与安全工程学报,2014,31(2):249.
[7]Feng SJ,Sun SG,Lv YG,et al.Research on the height of water flowing fractured zone of fully mechanized caving mining in extra-thick coal seam[J].Procedia Engineering,2011,26:466-471.
[8]Hang Y,Zhang GL,Yang GY.Numerical simulation of dewatering thick unconsolidated aquifers for safety of underground coal mining[J].Mining Science and Technology,2009,19(3):312-316.
[9]王敏,王凯,侯振功.钻孔成像方法在巷道围岩松动圈测试中的应用研究[J].矿业安全与环保,2012,39(5):31-33.
[10]马新平.三维可视化钻孔成像技术在煤矿井下钻探中的应用研究[J].河北能源职业技术学院学报,2015(4):68-71.
[11]王川婴,LAW K Tim.钻孔摄像技术的发展与现状[J].岩石力学与工程学报,2005,24(19):3440.
[12]Liang MX,Peng SP,Du WF,et al.Tectonic stress estimation from ultrasonic borehole image logs in a coal bed methane well,northeastern Qinshui Basin,China[J].Journal of Natural Gas Science and Engineering,2018,52:44-58.
[13]杨俊哲.7 m大采高综采工作面导水断裂带发育规律研究[J].煤炭科学技术,2016,44(1):61-66.
[14]王川婴,胡培良,孙卫春.基于钻孔摄像技术的岩体完整性评价方法[J].岩土力学,2010,31(4):1326.
[15]李卫明,张彬,石磊,等.基于钻孔摄像技术的水平孔节理裂隙发育特征研究[J].勘察科学技术,2017(3):27-31.