|
|
|
| A STRESS INTERVAL CLASSIFICATION METHOD FOR
CALCULATING ROCK ELASTIC PARAMETERS IN IN-SITU
STRESS MEASUREMENT |
| JI Dong1，2，REN Fenhua1，2，PENG Chao1，2，YAN Zhenxiong1，2 |
(1. School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China；
2. Key Laboratory of High-Efficient Mining and Safety of Metal Mines，University of Science and Technology Beijing，Beijing 100083，China) |
|
|
|
|
Abstract Confining pressure test for trepanning core acquired from in-situ stress measurement is an important means to obtain rock elastic parameters in in-situ stress calculation. The testing results and data processing play an important role in precision of final in-situ stress value. At present，rock elastic parameters are usually calculated on the basis of stress and strain under highest pressure in testing，which could lead to major error owing to rock nonlinear characteristics and test conditions. Confining pressure tests including multiple specimens are implemented by means of confining pressure instrument. Testing results are reasonable which are modified through analysis of testing curve law and consider multiple error factors. Based on loading unloading deformation theory of rock and rock nonlinearity，a calculation method in which elastic parameters are divided by different stress intervals is put forward. In-situ stress calculation example of No.10 mine of Pingdingshan Tian?an coal mine Co.，Ltd. is used to verify this method. The results reveal that linear correlation of calculated stress value and depth is more significant，which will provide references to improvement of in-situ stress calculation accuracy.
|
|
Received: 24 May 2013
|
|
|
|
| [1] WOROTNICKI G，WALTON R. Triaxial“hollow inclusion”gauges for determination of rock stresses in situ，investigation of stress in rock[R]. [S.l.]：[s.n]，1976.
[2] 蔡美峰. 地应力测量原理与技术[M]. 北京：科学出版社，2000：85–94.(CAI Meifeng. Principle and techniques of in-situ stress measurement[M]. Beijing：Science Press，2000：85–94.(in Chinese))
[3] HAKAKA M，HUDSON J A，CHRISTIANSSON R. Quality control of overcoring stress measurement data[J]. International Journal of Rock Mechanics and Mining Sciences，2003，40：1 141–1 159.
[4] 蔡美峰，乔 兰，于劲波. 空心包体应变计测量精度问题[J]. 岩土工程学报，1994，16(6)：15–20.(CAI Meifeng，QIAO Lan，YU Jinbo. The measurement precision of CSIRO cells[J]. Chinese Journal of Geotechnical Engineering，1994，16(6)：15–20.(in Chinese))
[5] 刘允芳，刘元坤. 围压试验在空心包体式应变计地应力测量中的作用[J]. 岩石力学与工程学报，2004，23(23)：3 932–3 937.(LIU Yunfang，LIU Yuankun. Function of confining pressure test on hollow inclusion triaxial strain gauge for geostress measurement[J]. Chinese Journal of Rock Mechanics and Engineering，2004，23(23)：3 932–3 937.(in Chinese))
[6] 王瑞红，蒋昱州，刘 杰，等. 循环加卸载对砂岩变形特征影响试验研究[J]. 采矿与安全工程学报，2011，28(2)：231–235.(WANG Ruihong，JIANG Yuzhou，LIU jie，et al. Experimental study of deformation characteristics of sandstone under cyclic loading and unloading conditions[J]. Journal of Mining and Safety Engineering，2011，28(2)：231–235.(in Chinese))
[7] 蔡美峰，何满潮，刘东燕. 岩石力学与工程[M]. 北京：科学出版社，2002：96–101.(CAI Meifeng，HE Manchao，LIU Dongyan. Rock mechanics and engineering[M]. Beijing：Science Press，2002：96–101.(in Chinese))
[8] 尤明庆，苏承东，徐 涛. 岩石试样的加载卸荷过程及杨氏模量[J]. 岩土工程学报，2001，23(5)：588–592.(YOU Mingqing，SU Chengdong，XU Tao. Loading or unloading process in axial direction and Young’s modulus of rock specimen[J]. Chinese Journal of Geotechnical Engineering，2001，23(5)：588–592. (in Chinese))
[9] 谢红强，何江达，徐 进，等. 岩石加卸载变形特性及力学参数试验研究[J]. 岩土工程学报，2003，25(3)：336–338.(XIE Hongqiang，HE Jiangda，XU Jin，et al. Deformation characteristics of rock under loading and unloading conditions and experimental study of mechanical parameters[J]. Chinese Journal of Geotechnical Engineering，2003，25(3)：336–338.(in Chinese))
[10] 苏承东，杨圣奇. 循环加卸载下岩样变形与强度特征试验[J]. 河海大学学报：自然科学版，2006，34(6)：667–671.(SU Chengdong，YANG Shengqi. Experimental study on deformation and strength characteristics of rock specimens under cyclic loading and unloading[J]. Journal of Hohai University：Natural Sciences，2006，34(6)：667–671.(in Chinese))
[11] 李 远，乔 兰，孙歆硕. 关于影响空心包体应变计地应力测量精度若干因素的讨论[J]. 岩石力学与工程学报，2006，25(10)：2 140– 2 144.(LI Yuan，QIAO Lan，SUN Xinshuo. Analyses of some factors affecting precision in in-situ stress measurement with method of CSIRO cells[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(10)：2 140–2 144.(in Chinese))
[12] 李正川. 岩石各向异性的单轴压缩试验研究[J]. 铁道科学与工程学报，2008，5(3)：69–72.(LI Zhengchuan. Experimental study on the uniaxial compression of anisotropic rocks[J]. Journal of railway science and engineering，2008，5(3)：69–72.(in Chinese))
[13] 尤明庆. 岩石试样的杨氏模量与围压的关系[J]. 岩石力学与工程学报，2003，22(1)：53–60.(YOU Mingqing. Effect of confining pressure on the Young?s modulus of rock specimen[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(1)：53–60.(in Chinese))
[14] 赵云川，李 琦，陈 江，等. 孔径变形法测试地应弹性模量参数选取分析[J]. 岩石力学与工程学报，2010，29(10)：2 143–2 147. (ZHAO Yunchuan，LI Qi，CHEN Jiang，et al. Analysis of elastic modulus parameter selection of aperture deformation method in in-situ stress measurement[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：2 143–2 147.(in Chinese))
[15] 郭奇峰，冀 东. 平煤十矿地应力场测试技术研究[J]. 煤炭科学技术，2012，40(2)：12–14.(GUO Qifeng，JI Dong. Study on measuring and test technology of ground stress field in no. 10 mine of Pingdingshan coal mining group[J]. Coal Science and Technology，2012，40(2)：12–14.(in Chinese))
[16] 蔡美峰，刘卫东，李 远. 玲珑金矿深部地应力测量及矿区地应力场分布规律[J]. 岩石力学与工程学报，2010，29(2)：227–233.(CAI Meifeng，LIU Weidong，LI Yuan. In-situ stress measurement at deep position of Linglong gold mine and distribution law of in-situ stress field in mine area[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(2)：227–233.(in Chinese)) |
|
|
|
2014, Vol. 33 
