潞安矿区井下地应力测量及分布规律研究
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摘要
在山西潞安矿区的13个煤矿采用小孔径水压致裂地应力测量装置,完成了60个测点的原岩应力测量工作。实测数据表明:潞安矿区55%的测点最大水平主应力大于垂直主应力,由于受埋藏深度与地质构造影响,矿区内各矿地应力值差别较大,但地应力大小总体上属于中等地应力值;潞安矿区最大水平主应力方向从南到北变化较大,构造应力场呈现出多变的形态。在实测数据的基础上,绘制了潞安矿区地应力分布图;分析了地应力随埋藏深度的变化规律、平均水平主应力与垂直主应力的比值与埋藏深度的关系。煤矿井下地应力测量为井田开拓、巷道布置与支护设计等工程实践提供了可靠的基础参数,提高了工程设计的科学性、合理性与可靠性。
60 points of in-situ rock stresses have been measured in 13 coal mines of Lu'an coal mine area by means of hydrofracturing stress measurement rig with small borehole.The stress measurement data point out that:the maximum horizontal principal stresses on 55% of the total measuring points are greater than the vertical stresses in Lu'an coal mine area;and the in-situ stress values exist great differences in various mines because of different buried depths and geological structures.However,the magnitude of the stresses is generally moderate value.The orientations of the maximum horizontal principal stresses change greatly from southern part to northern part,the tectonic stress fields present changeable state.Based on the field data,the stress distribution map of Lu'an coal mine area was drawn up;the stress variation with buried depth,and the relation between the specific value of the mean horizontal principal stresses to the vertical stresses and buried depth were analysed.The stress measurement results provide reliable fundamental parameters for engineering practices,such as mine field development,roadway layout and support design,and improve the scientific degree,rationality and reliability of engineering designs.
60 points of in-situ rock stresses have been measured in 13 coal mines of Lu'an coal mine area by means of hydrofracturing stress measurement rig with small borehole.The stress measurement data point out that:the maximum horizontal principal stresses on 55% of the total measuring points are greater than the vertical stresses in Lu'an coal mine area;and the in-situ stress values exist great differences in various mines because of different buried depths and geological structures.However,the magnitude of the stresses is generally moderate value.The orientations of the maximum horizontal principal stresses change greatly from southern part to northern part,the tectonic stress fields present changeable state.Based on the field data,the stress distribution map of Lu'an coal mine area was drawn up;the stress variation with buried depth,and the relation between the specific value of the mean horizontal principal stresses to the vertical stresses and buried depth were analysed.The stress measurement results provide reliable fundamental parameters for engineering practices,such as mine field development,roadway layout and support design,and improve the scientific degree,rationality and reliability of engineering designs.
引文
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[15]胡学军,范世民.煤巷锚杆支护成套技术在潞安矿区的应用[J].煤炭科学技术,2003,31(6):33-35.HU Xue-jun,FAN Shi-min.Completed set technology of bolt support for seam gateway applied to Lu’an mining area[J].Coal Science and Technology,2003,31(6):33-35.
[2]CHISTIANSSON R.The latest development for in-situ rock stress measuring techniques[C]//Proceedings of the International Symposium on In-situ Rock Stress.Trondheim:[s.n.],2006:3-10.
[3]康红普,王金华.煤巷锚杆支护理论与成套技术[M].北京:煤炭工业出版社,2007:36-51.
[4]李宏,马元春,王福江.压磁套芯三维原地应力测量研究[J].岩土力学,2007,28(2):253-257.LI Hong,MA Yuan-chun,WANG Fu-jiang.Study on3-D in-situ stress measurement by piezomagnetic overcoring method[J].Rock and Soil Mechanics,2007,28(2):253-257.
[5]胡斌,章光,李光煜.一次套钻确定三维地应力的新型钻孔变形计[J].岩土力学,2006,27(5):816-822.HU Bin,ZHANG Guang,LI Guang-yu.Determining3D in-situ stress with a new borehole deformeter by single overcore[J].Rock and Soil Mechanics,2006,27(5):816-822.
[6]康红普,林健.我国巷道围岩地质力学测试技术新进展[J].煤炭科学技术,2001,29(7):27-30.KANG Hong-pu,LIN Jian.New development in geomechanics measurement and test technology of mine roadway surrounding rock[J].Coal Science and Technology,2001,29(7):27-30.
[7]康红普,林健,张晓.深部矿井地应力测量方法研究与应用[J].岩石力学与工程学报,2007,26(5):929-933.KANG Hong-pu,LIN Jian,ZHANG Xiao.Research and application of in-situ stress measurement in deep mines[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):929-933.
[8]曾金元,郭民俭,吴拥政,等.地质力学测试及其在司马矿的应用[J].煤矿开采,2005,10(2):51-52.ZENG Jin-yuan,GUO Min-jian,WU Yong-zheng,et al.Geological mechanics testing and its application in Sima coal mine[J].Coal Mining Technology,2005,10(2):51-52.
[9]张晓.小孔径水压致裂地应力测量技术研究及现场应用[硕士学位论文D].北京:煤炭科学研究总院,2004.
[10]刘允芳,刘元坤.水压致裂法三维地应力测量方法的研究[J].地壳形变与地震,1999,19(3):64-71.LIU Yun-fang,LIU Yuan-kun.Study on3-D geostress determining method with hydrofracturing technique[J].Crustal Deformation and Earthquake,1999,19(3):64-71.
[11]陈群策,李方全,毛吉震.水压致裂法三维地应力测量的实用性研究[J].地质力学学报,2001,7(1):69-78.[[[[CHEN Qun-ce,LI Fang-quan,MAO Ji-zhen.Application study on three-dimensional geostress measurements by use of hydraulic fracturing method[J].Journal of Geomechanics,2001,7(1):69-78.
[12]刘文剑,吴湘滨,王东.水压致裂法测量裂隙岩体的地应力研究[J].煤田地质与勘探,2007,35(3):42-46.LIU Wen-jian,WU Xiang-bin,WANG Dong.Study on the geostresses measurement of fracture rock-mass with hydro-fracturing of borehole[J].Coal Geology&Exploration,2007,35(3):42-46.
[13]赵德安,陈志敏,蔡小林,等.中国地应力场分布规律统计分析[J].岩石力学与工程学报,2007,26(6):1265-1271.ZHAO De-an,CHEN Zhi-min,CAI Xiao-lin,et al.Analysis of distribution rule of geostress in China[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(6):1265-1271.
[14]陈志敏.不同岩性侧压比随深度变化规律探讨[J].西部探矿工程,2006,(6):99-101.CHEN Zhi-min.Discussion on change law of different lithology’s side press ratio with depths[J].West-China Exploration Engineering,2006,(6):99-101.
[15]胡学军,范世民.煤巷锚杆支护成套技术在潞安矿区的应用[J].煤炭科学技术,2003,31(6):33-35.HU Xue-jun,FAN Shi-min.Completed set technology of bolt support for seam gateway applied to Lu’an mining area[J].Coal Science and Technology,2003,31(6):33-35.
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