Similar model test and mechanical analysis of fault structure

Authors

SONG Yanqi, School of Mechanics&Civil Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
WANG Shilei, School of Mechanics&Civil Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
SUN Chuan, School of Mechanics&Civil Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China
HAO Liangjun, School of Mechanics&Civil Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China

Abstract

The pre-existing fault specimens were made to confirm the actual stratum mechanical properties based on the similarity theory. Then the mechanism of failure mode of pre-existing fault was analyzed under the crack tip stress field theory. The results show that with the increase of load, the microcracks develop gradually and propagate, and the propagation path tends to the loading direction. In the process of crack propagation, multiple branch paths are generated, and then the cracks merge with each other to destroy the specimen. The stress field theory can be used to determine the newly generated fracture direction, which is consistent with the main failure angle of the pre-existing fault.

Keywords

fault, similarity model, stress field, mechanical mechanism

DOI

10.3969/j.issn.1001-1986.2019.05.021

Recommended Citation

SONG Yanqi, WANG Shilei, SUN Chuan, et al. (2019) "Similar model test and mechanical analysis of fault structure," Coal Geology & Exploration: Vol. 47: Iss. 5, Article 22.
DOI: 10.3969/j.issn.1001-1986.2019.05.021
Available at: https://cge.researchcommons.org/journal/vol47/iss5/22

Reference

[1] 李增学. 煤矿地质学[M]. 北京:煤炭工业出版,2009.

[2] 程建远,金丹,覃思. 煤矿地质保障中地球物理探测技术面临的挑战[J]. 煤炭科学技术,2013,41(9):112-116. CHENG Jianyuan,JIN Dan,QIN Si. Challenges faced by geophysical detection technology in mine geological guarantee system[J]. Coal Science and Technology,2013,41(9):112-116.

[3] 彭苏萍,孟召平,李玉林. 断层对顶板稳定性影响相似模拟试验研究[J]. 煤田地质与勘探,2001,29(3):1-4. PENG Supin,MENG Zhaoping,LI Yulin. Influence of faults on coal roof stability by physical modeling study[J]. Coal Geology & Exploration,2001,29(3):1-4.

[4] AN Linji,SAMMIS C G. Development of strike-slip faults:Shear experiments in granular materials and clay using a new technique[J]. Journal of Structural Geology,1996,18(8):1061-1077.

[5] 唐诗佳,彭恩生,孙振家. 脆性断层形成的递进连通模型[J]. 长春科技大学学报,1999,29(4):330-333. TANG Shijia,PENG Ensheng,SUN Zhenjia. Progressive coalescence model of brittle fault formation[J]. Journal of Changchun University of Science and Technology,1999,29(4):330-333.

[6] 王玉珏,王元明. 断层破碎带的围岩应力对巷道的影响与控制[J]. 煤炭科技,1999(2):35-37. WANG Yujue,WANG Yuanming. The influence and control of the surrounding rock stress on the roadway of fracture zone[J]. Coal Science and Technology,1999(2):35-37.

[7] 王恩营,刘明举. 煤层断层形成的岩体综合强度分析[J]. 辽宁工程技术大学学报,2002,21(4):496-498. WANG Enying,LIU Mingju. Analysis of coal bed fault formation by comprehensive strength index method[J]. Journal of Liaoning Technical University,2002,21(4):496-498.

[8] 朱战军,周建勋. 雁列构造是走滑断层存在的充分判据?-来自平面砂箱模拟实验的启示[J]. 大地构造与成矿学,2004,28(2):142-148. ZHU Zhanjun,ZHOU Jianxun. Is en-echelon structure a sufficient criterion for the existence of strike-slip fault? Insights from the plane sandbox analog experiments[J]. Geotectonica et Metallogenia,2004,28(2):142-148.

[9] 朱维申,阮彦晟,李晓静,等. 断层附近应力分布的异常和对隧洞稳定的影响[J]. 地下空间与工程学报,2008,4(4):685-689. ZHU Weishen,RUAN Yansheng,LI Xiaojing,et al. The anomaly of stress distribution near the fault and its influence on the stability of the tunnel[J]. Chinese Journal of Underground Space and Engineering,2008,4(4):685-689.

[10] 雷显权,陈运平. 应用非连续模型研究断层对地壳应力的影响[J]. 中南大学学报(自然科学版),2011,42(8):2379-2386. LEI Xianquan,CHEN Yunping. Effects of faults on crustal stress using discontinuous model[J]. Journal of Central South University(Science and Technology),2011,42(8):2379-2386.

[11] 贾晓亮,崔洪庆,张子敏. 断层端部地应力影响因素数值分析[J]. 煤田地质与勘探,2010,38(4):47-51. JIA Xiaoliang,CUI Hongqing,ZHANG Zimin. Numerical simulation of geostatic stress influencing factor at the end of fault[J]. Coal Geology & Exploration,2010,38(4):47-51.

[12] 魏国营,王保军,闫江伟,等. 平顶山八矿突出煤层瓦斯地质控制特征[J]. 煤炭学报,2015,40(3):555-561. WEI Guoying,WANG Baojun,YAN Jiangwei,et al. Gas geological control characteristics of outbursts coal seam in Pingdingshan No.8 mine[J]. Journal of China Coal Society,2015,40(3):555-561.

[13] 王保军. 平煤八矿典型突出煤层的瓦斯地质控制特征研究[D]. 焦作:河南理工大学,2014.

[14] 杨仁树,张宇菲,杨立云,等. 石膏类相似材料的配比试验研究[J]. 中国矿业,2013,22(10):125-130. YANG Renshu,ZHANG Yufei,YANG Liyun,et al. Study on the mixing proportion test of similar material gypsum[J]. China Mining Magazine,2013,22(10):125-130.

[15] 童亨茂,聂金英,孟令箭,等. 基底先存构造对裂陷盆地断层形成和演化的控制作用规律[J]. 地学前缘,2009,16(4):97-104. TONG Hengmao,NIE Jinying,MENG Lingjian,et al. The law of basement pre-existing fabric controlling fault formation and evolution in rift basin[J]. Earth Science Frontiers,2009,16(4):97-104.

[16] 刘伟韬,姬保静,何寿迎. 断层破碎带变形破坏失稳过程模拟[J]. 煤田地质与勘探,2009,37(3):33-37. LIU Weitao,JI Baojing,HE Shouying. Simulation of the distortion and destruction process of fractured fault zone[J]. Coal Geology & Exploration,2009,37(3):33-37.