金川龙首矿西二采地应力状态分析
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摘要
为保证龙首矿西二采区开采和支护工程的顺利实施,在龙首矿西二采区1 430 m、1 514 m、1 610 m3个中段巷道上,采用空心包体应力解除法进行地应力测量,共获得6个测点三维应力测量数据,同时绘制各个测点不同法线方向的截面应力椭圆。结果表明:在井下100～280 m深度范围内,最大主应力量值约为10～14 MPa,属于中等应力水平;测点2、5、6最大主应力量值与最小主应力量值差值较大,范围在8.2～11.2 MPa;地应力状态特征参数KHh、KHV、Kav分布范围分别为1.43～4.81、1.06～3.1、0.88～2.28,基本在先前的参数研究范围内;各测点最大水平主应力大于垂直应力,构造力处于主导地位,但从各测点主应力与水平面的夹角大小可知,非水平应力场特征开始出现,显示该区应力特征的复杂性;最大主应力的方向为NNE、NWW2组,优势方向为NNE向,至于NWW方向是否可能成为西二采区新的最大主应力的优势方向还需进一步进行地应力测量工作方可得出结论。
In order to guarantee the smooth construction of the mining and supporting engineering in the secondary west mining area of Jinchuan Longshou Mine,an hollow inclusion stress relief method was adopted to obtain three dimensional stress data of 6 measuring points at the three horizontal roadways of 1 430 m,1 514 m,and 1 610 m,and the section stressellipses at different normal directions of each site was drawn. The results showed that the maximum principal stress value is about 10～14 MPa in the depth range of 100-280 m underground,and it belongs to the medium stress level;The difference between the maximum and the minimum principal stress values in the measuring points of 2,5,and 6 are relatively large,within the range of about 8.2～11.2 MPa;The KHh,KHV,and Kavof stress characteristic parameters are distributed within ranges of 1.43～4.81,1.06～3.1,0.88～2.28,respectively,and these are basically within the previous scopes;The maximum horizontal principal stress at each measuring point is higher than the vertical stress,and the tectonic stress is dominant in this region. However,according to the angle between the principal stress and the horizontal plane,it can be seen that the characteristics of the non-horizontal stress field begin to appear,indicating the in-situ stress in this area are complex;The directions of the maximum principal stress include two groups: NNE,the dominant direction,and NWW,of which the possibility in becoming the dominant direction of the new maximum principal stress,needs further in-situ stress measurement.
In order to guarantee the smooth construction of the mining and supporting engineering in the secondary west mining area of Jinchuan Longshou Mine,an hollow inclusion stress relief method was adopted to obtain three dimensional stress data of 6 measuring points at the three horizontal roadways of 1 430 m,1 514 m,and 1 610 m,and the section stressellipses at different normal directions of each site was drawn. The results showed that the maximum principal stress value is about 10～14 MPa in the depth range of 100-280 m underground,and it belongs to the medium stress level;The difference between the maximum and the minimum principal stress values in the measuring points of 2,5,and 6 are relatively large,within the range of about 8.2～11.2 MPa;The KHh,KHV,and Kavof stress characteristic parameters are distributed within ranges of 1.43～4.81,1.06～3.1,0.88～2.28,respectively,and these are basically within the previous scopes;The maximum horizontal principal stress at each measuring point is higher than the vertical stress,and the tectonic stress is dominant in this region. However,according to the angle between the principal stress and the horizontal plane,it can be seen that the characteristics of the non-horizontal stress field begin to appear,indicating the in-situ stress in this area are complex;The directions of the maximum principal stress include two groups: NNE,the dominant direction,and NWW,of which the possibility in becoming the dominant direction of the new maximum principal stress,needs further in-situ stress measurement.
引文
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[14]吴满路,马宇,廖椿庭,等.金川二矿深部1 000 m中段地应力测量及应力状态研究[J].岩石力学与工程学报,2008,27(S2):3785-3790.Wu Manlu,Ma Yu,Liao Chunting,et al.Study on recent state of stress in depth 1 000 m of Jinchuan Mine[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(S2):3785-3790.
[15]秦向辉,张鹏,丰成君,等.北京地区地应力测量与主要断裂稳定性分析[J].地球物理学报,2014,57(7):2165-2180.Qin Xianghui,Zhang Peng,Feng Chengjun,et al.In-situ stress measurements and slip stability of major faults in Beijing region,China[J].Chinese Journal of Geophysics,2014,57(7):2165-2180.
[16]景锋,盛谦,张勇惠,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):2057-2062.Jing Feng,Sheng Qian,Zhang Yonghui,et al.Research on distribution of shallow crustal geostress in china mainland[J].Journal of Rock Mechanics and Engineering,2007,26(10):2057-2062.
[17]Brown E T,Hoek E.Trends in relationship between measured insitu stresses and depth[J].Int J Rock Mech Min Sci&Geomech Abstr,1978,15(4):211-215.
[18]王艳华,崔效峰,胡幸平,等.基于原地应力测量数据的中国大陆地壳上部应力状态研究[J].地球物理学报,2012,55(9):3016-3027.Wang Yanhua,Cui Xiaofeng,Hu Xingping,et al.Study on the stress state in upper crust of China mainland based on in-situ stress measurements[J].Chinese Journal of Geophysics,2012,55(9):3016-3027.
[2]刘佑荣,唐辉明.岩体力学[M].武汉:中国地质大学出版社,1999.Liu Yourong,Tang Huiming.Rock Mechanics[M].Wuhan:China University of Geosciences Press,1999.
[3]张重远,吴满路,陈群策,等.地应力测量方法综述[J].河南理工大学学报:自然科学版,2012,31(3):305-310.Zhang Chongyuan,Wu Manlu,Chen Qunce,et al.Review of in-situ stress measurement methods[J].Journal of Henan Polytechnic University:Natural Science,2012,31(3):305-310.
[3]康红普,林健,颜立新,等.山西煤矿矿区井下地应力场分布特征研究[J].地球物理学报,2009,52(7):1782-1792.Kang Hongpu,Lin Jian,Yan Lixin,et al.Study on characteristics of underground in-situ stress distribution in Shanxi coal mining fields[J].Chinese Journal of Geophysics,2009,52(7):1782-1792.
[5]蔡美峰,陈长臻,彭华,等.万福煤矿深部水压致裂地应力测量[J].岩石力学与工程学报,2006,25(5):1069-1074.Cai Meifeng,Chen Changzheng,Peng Hua,et al.In-situ stress measurement by hydraulic fracturing technique in deep position of Wanfu coal mine[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(5):1069-1074.
[6]陈群策,范桃园,李绪深,等.中国南海海域北部地区现今地应力实测及综合分析研究[J].地球物理学报,2014,57(8):2518-2529.Chen Qunce,Fan Taoyuan,Li Xushen,et al.In situ measurements and comprehensive research on the present crustal stress of Northern South China Sea[J].Chinese Journal of Geophysics,2014,57(8):2518-2529.
[7]吴满路,张春山,廖椿庭,等.青藏高原腹地现今地应力测量与应力状态研究[J].地球物理学报,2005,48(2):327-332.Wu Manlu,Zhang Chunshan,Liao Chunting,et al.The recent state of stress in the central Qinghai-Tibet Plateau according to insitu stress measurements[J].Chinese Journal of Geophysics,2005,48(2):327-332.
[8]王连国,陆银龙,杨新华,等.霍州矿区地应力分布规律实测研究[J].岩石力学与工程学报,2010,29(S1):2768-2774.Wang Lianguo,Lu Yinlong,Yang Xinhua,et al.Study of distribution characteristics of in-situ stresses for Huozhou mining area[J].Chinese Journal of Rock Mechanics and Engineering,2010,29(S1):2768-2774.
[9]王炯,冯正浩,孟志刚,等.红阳矿区地应力测量及其数值分析研究[J].采矿与安全工程学报,2017,34(1):134-140.Wang Jiong,Feng Zhenghao,Meng Zhigang,et al.In-situ stress measurement and its numerical analysis in Hongyang mining area[J].Journal of Mining&Safety Engineering,2017,34(1):134-140.
[10]孙东生,吕海涛,王连捷,等.ASR和DITF法综合确定塔里木盆地7 km深部地应力状态[J].岩石力学与工程学报,2018,37(2):383-391.Sun Dongsheng,Lu Haitao,Wang Lianjie,et al.Determination of the in-situ stress state at 7 km depth under Tarim Basin by ASRand DITH methods[J].Chinese Journal of Rock Mechanics and Engineering,2018,37(2):383-391.
[11]张重远,吴满路,廖椿庭.金川三矿地应力测量及应力状态特征研究[J].岩土力学,2013,34(11):3254-3260.Zhang Chongyuan,Wu Manlu,Liao Chunting.In-situ stress measurement and study of stress state characteristics of Jinchuan No.3mine[J].Rock and Soil Mechanics,2013,34(11):3254-3260.
[12]廖椿庭,崔鸣铎,任希飞,等.金川矿区应力测量与构造应力场[M].北京:地质出版社,1985.Liao Chunting,Cui Mingduo,Ren Xifei,et al.Stress Measurement and Tectonic Stress Field in Jinchuan Mining Area[M].Beijing:Geological Publishing House,1985.
[13]汤中立,李文渊.金川铜镍硫化物(含铂)矿床成矿模式及地质对比[M].北京:地质出版社,1995.Tang Zhongli,Li Wenyuan.Metallogenic Model and Geological Correlation of Copper Nickel Sulfide(Platinum Bearing)Deposits in Jinchuan[M].Beijing:Geological Publishing House,1995.
[14]吴满路,马宇,廖椿庭,等.金川二矿深部1 000 m中段地应力测量及应力状态研究[J].岩石力学与工程学报,2008,27(S2):3785-3790.Wu Manlu,Ma Yu,Liao Chunting,et al.Study on recent state of stress in depth 1 000 m of Jinchuan Mine[J].Chinese Journal of Rock Mechanics and Engineering,2008,27(S2):3785-3790.
[15]秦向辉,张鹏,丰成君,等.北京地区地应力测量与主要断裂稳定性分析[J].地球物理学报,2014,57(7):2165-2180.Qin Xianghui,Zhang Peng,Feng Chengjun,et al.In-situ stress measurements and slip stability of major faults in Beijing region,China[J].Chinese Journal of Geophysics,2014,57(7):2165-2180.
[16]景锋,盛谦,张勇惠,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):2057-2062.Jing Feng,Sheng Qian,Zhang Yonghui,et al.Research on distribution of shallow crustal geostress in china mainland[J].Journal of Rock Mechanics and Engineering,2007,26(10):2057-2062.
[17]Brown E T,Hoek E.Trends in relationship between measured insitu stresses and depth[J].Int J Rock Mech Min Sci&Geomech Abstr,1978,15(4):211-215.
[18]王艳华,崔效峰,胡幸平,等.基于原地应力测量数据的中国大陆地壳上部应力状态研究[J].地球物理学报,2012,55(9):3016-3027.Wang Yanhua,Cui Xiaofeng,Hu Xingping,et al.Study on the stress state in upper crust of China mainland based on in-situ stress measurements[J].Chinese Journal of Geophysics,2012,55(9):3016-3027.