A modified method to measure geostress of rock mass
High geostress with some geological disasters induced, such as rockburst and large deformation. ln-situ stress measurement is an important factor for the forecast of rock disasters. The rockmass geostress is determined according to Kaiser effect of the rock. This method is applied widely in rockmass engineering. In this paper, the authors found out the principal direction of initial stress with the method of focal mechanism solution and measured the in-situ stress by acoustic emission Kaiser effect test in laboratory. The focal mechanism solution combined with Kaiser effect can overcome the shortcoming of Kaiser effect by oriented rock core. Testing study is made on the rock core of Da xiang ling Niba mountain tunnel with 10kin length and 1650m depth of burial. Results of Kaiser effect combined with the method of focal mechanism solution and conclusion by hydraulic fracturing method are basically coincident. It shows that the method is feasible, more simple ,economical and convenient for measuring.
DENG Lin Deng Ronggui SHAO Jiang
College of Civil Engineering,Southwest Jiaotong University,Chengdu China,610031 Highway Investigation and Design Institute of the Traffic Department of Sichuan Province,Chengdu,Chi
国际会议
International Symposium and The 7th Asian Regional Conference of IAEG(国际工程地质与环境协会年会暨第七届亚洲工程地质会议)
成都
英文
760-764
2009-09-09（万方平台首次上网日期，不代表论文的发表时间）