煤矿深部岩体地应力特征及开挖扰动后围岩塑性区变化规律
|
摘要
基于淮南5个煤矿区的水压致裂法地应力测量结果,揭示淮南煤矿区的地应力特征及其随岩性的变化规律,分析开挖后围岩应力特征及塑性区变化规律,初步得出如下结论:(1)淮南5个煤矿区地应力以构造应力场为主,属高应力区;(2)岩性对岩体地应力侧压系数影响大,砂岩区岩体地应力侧压系数为1.52～1.87,泥岩区岩体地应力侧压系数为1.08～1.18;(3)岩性是影响围岩塑性区特征的重要因素。由于岩性的差异,最大主应力相近的潘一煤矿和顾桥煤矿南区围岩塑性区范围有较大差异。与此同时,刘庄煤矿实测部位最大水平主应力小于潘一煤矿,但由于矿区测试部位的岩性为灰泥岩,围岩塑性区范围明显大于岩性为石英砂岩的潘一煤矿。研究结果可为类似巷道围岩的变形破坏机制分析以及巷道加固支护提供参考。
Based on in-situ stress measurement results in 5 mine areas of Huainan coal mine,Anhui province,by hydraulic fracturing method,the in-situ stress characteristics and the influence of lithology on it are revealed;the variation law of stress and plastic zone of surrounding rocks around tunnels after excavation are analyzed.The following preliminary results are obtained as follows:(1) The tectonic stress is dominant in these areas and the stress level is high.(2) The lithology has a great influence on the coefficient of lateral pressure.The obtained coefficients of sandstone are 1.52–1.87,and for mudstone,they are 1.08–1.18.(3) The lithology has a great influence on the plastic zone of surrounding rocks around tunnels.Because of the difference of lithology,the range of plastic zone in Panyi mine differs greatly from that of south part of Guqiao coal mine,though the maximum horizontal principal stresses of these two mines are close.In addition,the range of plastic zone in Liuzhuang coal mine which consists of calcilutyte is obviously greater than that of Panyi coal mine which consists of quartz-sandstone,though the maximum horizontal principal stresses at the measured depth in Liuzhuang coal mine is smaller than that of Panyi coal mine.The results can provide references for analysis of failure mechanism of surrounding rocks and reinforcement and support of tunnels of similar projects.
Based on in-situ stress measurement results in 5 mine areas of Huainan coal mine,Anhui province,by hydraulic fracturing method,the in-situ stress characteristics and the influence of lithology on it are revealed;the variation law of stress and plastic zone of surrounding rocks around tunnels after excavation are analyzed.The following preliminary results are obtained as follows:(1) The tectonic stress is dominant in these areas and the stress level is high.(2) The lithology has a great influence on the coefficient of lateral pressure.The obtained coefficients of sandstone are 1.52–1.87,and for mudstone,they are 1.08–1.18.(3) The lithology has a great influence on the plastic zone of surrounding rocks around tunnels.Because of the difference of lithology,the range of plastic zone in Panyi mine differs greatly from that of south part of Guqiao coal mine,though the maximum horizontal principal stresses of these two mines are close.In addition,the range of plastic zone in Liuzhuang coal mine which consists of calcilutyte is obviously greater than that of Panyi coal mine which consists of quartz-sandstone,though the maximum horizontal principal stresses at the measured depth in Liuzhuang coal mine is smaller than that of Panyi coal mine.The results can provide references for analysis of failure mechanism of surrounding rocks and reinforcement and support of tunnels of similar projects.
引文
[1]HUDSON J A,CORNET F H,CHRISTIANSSON R.ISRM suggestedmethods for rock stress estimation[J].International Journal of RockMechanics and Mining Sciences,2003,40(7):991–998.
[2]刘允芳.岩体地应力与工程建设[M].武汉:湖北科学技术出版社,2000:240–258.((LIU Yunfang.Geostress of rock mass and engineeringconstruction[M].Wuhan:Hubei Science and Technology Press,2000:240–258.(in Chinese))
[3]刘亚群,罗超文,李海波.南水北调西线工程区地应力测量及地应力场特征分析[J].岩石力学与工程学报,2005,24(20):3 620–3 624.(LIU Yaqun,LUO Chaowen,LI Haibo.Study on in-situ stressesmeasurments and characteristics of in-situ stresses field in west routeof South-to-North Water Transfer Project[J].Chinese Journal of RockMechanics and Engineering,2005,24(20):3 620–3 624.(in Chinese))
[4]李方全,刘鹏,张钧.原地应力测量对某核废料处置场场地评价的应用[J].岩石力学与工程学报,1993,13(1):55–62.(LIFangquan,LIU Peng,ZHANG Jun.Application of in-situ stressmeasurements to the assessment of a site for nuclear waste disposal[J].Chinese Journal of Rock Mechanics and Engineering,1993,13(1):55–62.(in Chinese))
[5]祁英男,李方全,毛吉震.万家寨水利枢纽水压致裂应力测量结果和分析[J].岩石力学与工程学报,1999,18(2):188–191.(QIYingnan,LI Fangquan,MAO Jizhen.The hydrofracturing in-situ stressmeasurement and analysis for Wanjiazhai water control project[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(2):188–191.(in Chinese))
[6]吴满路,廖椿庭,张春山,等.红透山铜矿地应力测量与分布规律研究[J].岩石力学与工程学报,2004,23(23):3 943–3 947.(WUManlu,LIAO Chunting,ZHANG Chunshan,et al.In-situ stressmeasurement and analysis of its distribution law in Hongtoushancopper mine[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(23):3 943–3 947.(in Chinese))
[7]李方全.地应力测量[J].岩石力学与工程学报,1985,4(1):95–111.(LI Fangquan.Geostress measurement[J].Chinese Journal ofRock Mechanics and Engineering,1985,4(1):95–111.(in Chinese))
[8]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 Hongpu,LIN Jian.Newdevelopment in geomechanics measurement and test technology ofmine roadway surrounding rock[J].Coal Science and Technology,2001,29(7):27–30.(in Chinese))
[9]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 Hongpu,L1N Jian,ZHANG Xiao.Research and application of in-situ stressmeasurement in deep mines[J].Chinese Journal of Rock Mechanicsand Engineering,2007,26(5):929–933.(in Chinese))
[10]罗超文,李海波,刘亚群.深埋巷道地应力测量及围岩应力分布特征研究[J].岩石力学与工程学报,2010,29(7):1 418–1 423.(LUOChaowen,LI Haibo,LIU Yaqun.Study of distribtion characteristics ofstress in surrounding rock mass and in-situ stress measurement fordeeply buried tunnels[J].Chinese Journal of Rock Mechanics andEngineering,2010,29(7):1 418–1 423.(in Chinese))
[11]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 Zhimin.Discussion on change law ofdifferent lithology′s side pressure ratio with depths[J].West-ChinaExploration Engineering,2006,(6):99–101.(in Chinese))
[12]安其美,郭启良,赵仕广,等.地下洞室围岩应力的测量研究[J].岩土力学,1996,17(1):48–53.(AN Qimei,GUO Qiliang,ZHAOShiguang,et al.The research and measurements of the stress insurrounding rock of underground tunnel[J].Rock and Soil Mechanics,1996,17(1):48–53.(in Chinese))
[13]董燕君,黄纸鹏,陈赛超.某地下洞室围岩松动区深度的测试与分析[J].岩土工程技术,2009,23(1):44–47.(DONG Yanjun,HUANGZhipeng,CHEN Saichao.Test and analysis for surrounding rock massdisturbed zone of underground cavern[J].Geotechnical EngineeringTechnique,2009,23(1):44–47.(in Chinese))
[14]李垚,朱文,程海燕.潘一煤矿井田11–2煤层小构造分布规律研究[J].煤田地质与勘探,2003,(5):17–20.(LI Yao,ZHU Wen,CHENG Haiyan.Research on distribution regularities of smallstructures in coal seam 11–2,Panyi coal mine[J].Coal Geology andExploration,2003,(5):17–20.(in Chinese))
[15]朱焕春,陶振宇.不同岩石中地应力分布[J].地震学报,1999,16(1):49–63.(ZHU Huanchun,TAO Zhenyu.Geostress distributionsin different rocks[J].Acta Seismological Sinica,1999,16(1):49–63.(in Chinese))
[16]景锋,盛谦,张勇慧,等.中国大陆浅层地壳实测地应力分布规律研究[J].岩石力学与工程学报,2007,26(10):2 056–2 062.(JING Feng,SHENG Qian,ZHANG Yonghui,et al.Research ondistribution rule of shallow crustal geostress in China Mainland[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(10):2 056–2 062.(in Chinese))
[17]李通林,谭学术,刘传伟.矿山岩体力学[M].重庆:重庆大学出版社,1991:8–11.(LI Tonglin,TAN Xueshu,LIU Chuanwei.Themine rock mass mechanics[M].Chongqing:Chongqing UniversityPress,1991:8–11.(in Chinese))
[18]郭启良,赵仕广,丁立丰,等.地下洞室围岩应力状态及相关参数测量结果的分析与评价[J].岩石力学与工程学报,2007,26(增1):3 361–3 365.(GUO Qiliang,ZHAO Shiguang,DING Lifeng,et al.Analysis and evalutian of measurement results of in-situ stress stateand related parameters for surrounding rock mass of undergroundcavern[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(Supp.1):3 361–3 365.(in Chinese))
[2]刘允芳.岩体地应力与工程建设[M].武汉:湖北科学技术出版社,2000:240–258.((LIU Yunfang.Geostress of rock mass and engineeringconstruction[M].Wuhan:Hubei Science and Technology Press,2000:240–258.(in Chinese))
[3]刘亚群,罗超文,李海波.南水北调西线工程区地应力测量及地应力场特征分析[J].岩石力学与工程学报,2005,24(20):3 620–3 624.(LIU Yaqun,LUO Chaowen,LI Haibo.Study on in-situ stressesmeasurments and characteristics of in-situ stresses field in west routeof South-to-North Water Transfer Project[J].Chinese Journal of RockMechanics and Engineering,2005,24(20):3 620–3 624.(in Chinese))
[4]李方全,刘鹏,张钧.原地应力测量对某核废料处置场场地评价的应用[J].岩石力学与工程学报,1993,13(1):55–62.(LIFangquan,LIU Peng,ZHANG Jun.Application of in-situ stressmeasurements to the assessment of a site for nuclear waste disposal[J].Chinese Journal of Rock Mechanics and Engineering,1993,13(1):55–62.(in Chinese))
[5]祁英男,李方全,毛吉震.万家寨水利枢纽水压致裂应力测量结果和分析[J].岩石力学与工程学报,1999,18(2):188–191.(QIYingnan,LI Fangquan,MAO Jizhen.The hydrofracturing in-situ stressmeasurement and analysis for Wanjiazhai water control project[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(2):188–191.(in Chinese))
[6]吴满路,廖椿庭,张春山,等.红透山铜矿地应力测量与分布规律研究[J].岩石力学与工程学报,2004,23(23):3 943–3 947.(WUManlu,LIAO Chunting,ZHANG Chunshan,et al.In-situ stressmeasurement and analysis of its distribution law in Hongtoushancopper mine[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(23):3 943–3 947.(in Chinese))
[7]李方全.地应力测量[J].岩石力学与工程学报,1985,4(1):95–111.(LI Fangquan.Geostress measurement[J].Chinese Journal ofRock Mechanics and Engineering,1985,4(1):95–111.(in Chinese))
[8]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 Hongpu,LIN Jian.Newdevelopment in geomechanics measurement and test technology ofmine roadway surrounding rock[J].Coal Science and Technology,2001,29(7):27–30.(in Chinese))
[9]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 Hongpu,L1N Jian,ZHANG Xiao.Research and application of in-situ stressmeasurement in deep mines[J].Chinese Journal of Rock Mechanicsand Engineering,2007,26(5):929–933.(in Chinese))
[10]罗超文,李海波,刘亚群.深埋巷道地应力测量及围岩应力分布特征研究[J].岩石力学与工程学报,2010,29(7):1 418–1 423.(LUOChaowen,LI Haibo,LIU Yaqun.Study of distribtion characteristics ofstress in surrounding rock mass and in-situ stress measurement fordeeply buried tunnels[J].Chinese Journal of Rock Mechanics andEngineering,2010,29(7):1 418–1 423.(in Chinese))
[11]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 Zhimin.Discussion on change law ofdifferent lithology′s side pressure ratio with depths[J].West-ChinaExploration Engineering,2006,(6):99–101.(in Chinese))
[12]安其美,郭启良,赵仕广,等.地下洞室围岩应力的测量研究[J].岩土力学,1996,17(1):48–53.(AN Qimei,GUO Qiliang,ZHAOShiguang,et al.The research and measurements of the stress insurrounding rock of underground tunnel[J].Rock and Soil Mechanics,1996,17(1):48–53.(in Chinese))
[13]董燕君,黄纸鹏,陈赛超.某地下洞室围岩松动区深度的测试与分析[J].岩土工程技术,2009,23(1):44–47.(DONG Yanjun,HUANGZhipeng,CHEN Saichao.Test and analysis for surrounding rock massdisturbed zone of underground cavern[J].Geotechnical EngineeringTechnique,2009,23(1):44–47.(in Chinese))
[14]李垚,朱文,程海燕.潘一煤矿井田11–2煤层小构造分布规律研究[J].煤田地质与勘探,2003,(5):17–20.(LI Yao,ZHU Wen,CHENG Haiyan.Research on distribution regularities of smallstructures in coal seam 11–2,Panyi coal mine[J].Coal Geology andExploration,2003,(5):17–20.(in Chinese))
[15]朱焕春,陶振宇.不同岩石中地应力分布[J].地震学报,1999,16(1):49–63.(ZHU Huanchun,TAO Zhenyu.Geostress distributionsin different rocks[J].Acta Seismological Sinica,1999,16(1):49–63.(in Chinese))
[16]景锋,盛谦,张勇慧,等.中国大陆浅层地壳实测地应力分布规律研究[J].岩石力学与工程学报,2007,26(10):2 056–2 062.(JING Feng,SHENG Qian,ZHANG Yonghui,et al.Research ondistribution rule of shallow crustal geostress in China Mainland[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(10):2 056–2 062.(in Chinese))
[17]李通林,谭学术,刘传伟.矿山岩体力学[M].重庆:重庆大学出版社,1991:8–11.(LI Tonglin,TAN Xueshu,LIU Chuanwei.Themine rock mass mechanics[M].Chongqing:Chongqing UniversityPress,1991:8–11.(in Chinese))
[18]郭启良,赵仕广,丁立丰,等.地下洞室围岩应力状态及相关参数测量结果的分析与评价[J].岩石力学与工程学报,2007,26(增1):3 361–3 365.(GUO Qiliang,ZHAO Shiguang,DING Lifeng,et al.Analysis and evalutian of measurement results of in-situ stress stateand related parameters for surrounding rock mass of undergroundcavern[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(Supp.1):3 361–3 365.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心