爆炸荷载作用下裂隙岩体内损伤范围的观测研究
|
摘要
通过电法CT成像技术,探测微量炸药爆炸前后裂隙岩体深孔之间电阻率的变化,查明探测切面内的岩体损伤裂隙发育形态和空间展布。通过实验可知:微量炸药爆炸后在裂隙岩体的炮孔深部可以形成一定范围、一定数量和一定宽度的裂隙,其中裂隙形成的区域主要集中在炮孔口深的2/3处,当炮孔深度3 m,装药量为330 g时,在眼深1.5～2.5 m处裂隙较为发育,炮孔间距为1.2 m～1.5 m时,可在岩体内部形成贯通裂隙。
Detecing the changes of resistivity in deep holes of fissure rock before and after micro explosive blasting to the limestone in Luyuan Mountain Villa with electrical CT image,a certain range,number and width fissures could develop in deep blasting holes after micro explosive blasting,and areas which were caused by fissures mainly located at about 2/3 depth of the bottom of the blasting holes.when the depth of blasting hole is 3 m,and the explosive weighted 330g,fissures developed easily at the depth of 1.5-2.5 m of the blasting hole.when the distance between the blasting holes is 1.2-1.5 m,penetration fissures could form in the internal rock,providing scientific basis for blasting engineering design and construction.
Detecing the changes of resistivity in deep holes of fissure rock before and after micro explosive blasting to the limestone in Luyuan Mountain Villa with electrical CT image,a certain range,number and width fissures could develop in deep blasting holes after micro explosive blasting,and areas which were caused by fissures mainly located at about 2/3 depth of the bottom of the blasting holes.when the depth of blasting hole is 3 m,and the explosive weighted 330g,fissures developed easily at the depth of 1.5-2.5 m of the blasting hole.when the distance between the blasting holes is 1.2-1.5 m,penetration fissures could form in the internal rock,providing scientific basis for blasting engineering design and construction.
引文
[1]刘盛东,吴荣新.高密度电阻率法观测煤层上覆岩层破坏[J].煤炭科学技术,2001,29(4):18―21.LIU Sheng-dong,WU Rong-xin.High density electric resistance method applied to monitor and measure overburden failure above seam[J].Coal Science and Technology,2001,29(4):18―21.
[2]周建民,金丰年.地下工程塌方的综合物探研究[J].岩土力学.2004,(25)增刊:441―444.ZHOU Jian-min,JIN Fong-nian.Study of synthetic geophysical exploration method for collapsed underground engineering[J].Rock and Soil Mechanics,2004,(25)supp:441―444.
[3]刘盛东,吴军.地下工程震波技术与应用[J].中国煤田地质.2001,13(3):59―61.LIU Sheng-dong,WU Jun.Technique and application of shock wave in underground project[J].Coal Geology of China,2001,13(3):59―61.
[4]彭苏萍,凌标灿.综采放顶煤工作面地震CT探测技术应用[J].岩石力学与工程学报,2002,21(12):1 786―1 790.PENG Su-pin,LIN Biao-can.Application of seismic tomofraphy in long-wall top-coal caving face[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(12):1 786―1 790.
[5]冯锐,李晓芹.电阻率层析成像用于水文地质勘探[J].地震学报,1997,19(6):655―663.FONG Rui,LI Xiao-qin.The application on of method in search of hydrogeology with electrical resistivty tomography[J].Journal of Earthquake Engineering,1997,19(6):655―663.
[6]董浩斌,王传雷.高密度电法的发展与应用[J].地学前沿,2003,10(1):171―176.DONG Hao-bin,WANG Chuan-lei.Development and application of 2D resistivity imaging surveys[J].Earth Science Frontiers,2003,10(1):171―176.
[7]底青云,王妙月.电阻率成像在堤坝勘察中的应用[J].工程地质学报,2002,10(1):74―78.DI Qing-yun,WANG Miao-yue.The application to dam exploration with electrical resistivty tomography[J].Jounal of Engineering Geology,2002,10(1):74―78.
[2]周建民,金丰年.地下工程塌方的综合物探研究[J].岩土力学.2004,(25)增刊:441―444.ZHOU Jian-min,JIN Fong-nian.Study of synthetic geophysical exploration method for collapsed underground engineering[J].Rock and Soil Mechanics,2004,(25)supp:441―444.
[3]刘盛东,吴军.地下工程震波技术与应用[J].中国煤田地质.2001,13(3):59―61.LIU Sheng-dong,WU Jun.Technique and application of shock wave in underground project[J].Coal Geology of China,2001,13(3):59―61.
[4]彭苏萍,凌标灿.综采放顶煤工作面地震CT探测技术应用[J].岩石力学与工程学报,2002,21(12):1 786―1 790.PENG Su-pin,LIN Biao-can.Application of seismic tomofraphy in long-wall top-coal caving face[J].Chinese Journal of Rock Mechanics and Engineering,2002,21(12):1 786―1 790.
[5]冯锐,李晓芹.电阻率层析成像用于水文地质勘探[J].地震学报,1997,19(6):655―663.FONG Rui,LI Xiao-qin.The application on of method in search of hydrogeology with electrical resistivty tomography[J].Journal of Earthquake Engineering,1997,19(6):655―663.
[6]董浩斌,王传雷.高密度电法的发展与应用[J].地学前沿,2003,10(1):171―176.DONG Hao-bin,WANG Chuan-lei.Development and application of 2D resistivity imaging surveys[J].Earth Science Frontiers,2003,10(1):171―176.
[7]底青云,王妙月.电阻率成像在堤坝勘察中的应用[J].工程地质学报,2002,10(1):74―78.DI Qing-yun,WANG Miao-yue.The application to dam exploration with electrical resistivty tomography[J].Jounal of Engineering Geology,2002,10(1):74―78.
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