Supporting technology of roadway crossing fractured zone of fault under dynamic and static load

Authors

SONG Weihua, Mining Institute, Liaoning Technical University, Fuxin 123000, China
DI Chunlei, Mining Institute, Liaoning Technical University, Fuxin 123000, China
DENG Zhaorui, Mining Institute, Liaoning Technical University, Fuxin 123000, China

Abstract

The gateway 5303 encountered multiple normal faults during the driving in Changping mine of Jinmei Group. For the purpose that the gateway can pass through the faults safely and rapidly and ensure applicative methods and scope of supporting. So based on the principle of maximum principal stress and fracture damage mechanics of rock, the paper analyzes the crushing mechanism of the normal fault zone under dynamic and static load from macroscopic and microscopic perspectives. Then, the plastic failure model of fault zone was established, the normal fault sliding mechanism and supporting theory were combined to derive the expression of the fault growth area and the domain of influence, and further analyzed by FLAC^3D. Research indicates that the rock will break when the sum of the maximum principal stress of the static and dynamic loads. Dynamic and static loads produce synergistic effect, mutative effect and common effect, which causes fracture zone damage and fractures in different ways microscopically, and the extent of which depends on the cosine and sine of the angle between the dynamic and static loads. The pre-grouting for increasing the strength of surrounding rock and the joint support methods that encrypt bolts and cables and single props with I-beams adopted to make the gateway 5303 pass through faults. According to theoretical calculations and numerical simulation results, the final pre-grouting and supporting range was determined to be 10 m before and after the fault zone.

Keywords

normal fault, dynamic and static load, joint support, support range, fault fracture zone, Changping mine of Jinmei Group

DOI

10.3969/j.issn.1001-1986.2019.06.021

Recommended Citation

SONG Weihua, DI Chunlei, DENG Zhaorui, et al. (2019) "Supporting technology of roadway crossing fractured zone of fault under dynamic and static load," Coal Geology & Exploration: Vol. 47: Iss. 6, Article 22.
DOI: 10.3969/j.issn.1001-1986.2019.06.021
Available at: https://cge.researchcommons.org/journal/vol47/iss6/22

Reference

[1] 师修昌,孟召平,张娟,等. 断层面摩擦强度对工作面开采影响数值模拟分析[J]. 煤田地质与勘探,2016,44(6):113-118. SHI Xiuchang,MENG Zhaoping,ZHANG Juan,et al. Numerical analysis on the influence of frictional strength of fault plane on working face mining[J]. Coal Geology & Exploration,2016,44(6):113-118.

[2] 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.

[3] 刘咸卫,曹运兴,刘瑞,等. 正断层两盘的瓦斯突出分布特征及其地质成因浅析[J]. 煤炭学报,2000,25(6):571-575. LIU Xianwei,CAO Yunxing,LIU Rui,et al. Analysis on distribution features of gas outburst from two walls of normal fault and geological origin[J]. Journal of China Coal Society,2000,25(6):571-575.

[4] 姚再峰,卫文彬,魏臻,等. 过断层特大断面厚煤顶煤巷破坏机理及围岩控制技术[J]. 煤矿安全,2015,46(3):22-24. YAO Zaifeng,WEI Wenbin,WEI Zhen,et al. Coal roadway failure mechanism and surrounding rock control for thick roof coal with large section passing through fault[J]. Safety in Coal Mines,2015,46(3):22-24.

[5] 肖同强,柏建彪,李金鹏,等. 断层附近煤巷锚杆支护破碎围岩稳定机理研究[J]. 采矿与安全工程学报,2010,27(4):482-486. XIAO Tongqiang,BAI Jianbiao,LI Jinpeng,et al. Stabilization mechanism of crushed surrounding rock in coal roadway with bolt support near fault[J]. Journal of Mining & Safety Engineering,2010,27(4):482-486.

[6] 孟庆彬,韩立军,齐彪,等. 复杂地质条件下巷道过断层关键技术研究及应用[J]. 采矿与安全工程学报,2017,34(2):199-207. MENG Qingbin,HAN Lijun,QI Biao,et al. Study and application of key technology for roadway crossing faults under complex geological conditions[J]. Journal of Mining & Safety Engineering,2017,34(2):199-207.

[7] 赵毅鑫,姜耀东,孟磊,等. 超前管棚注浆支护技术在极复杂断层带中的应用[J]. 采矿与安全工程学报,2013,30(2):262-266. ZHAO Yixin,JIANG Yaodong,MENG Lei,et al. Supporting technique with advanced pipe-shed grouting in extremely complicated faulting zone[J]. Journal of Mining & Safety Engineering,2013,30(2):262-266.

[8] 刘泉声,卢超波,卢海峰,等. 断层破碎带深部区域地表预注浆加固应用与分析[J]. 岩石力学与工程学报,2013,32(增刊2):3688-3695. LIU Quansheng,LU Chaobo,LU Haifeng,et al. Application and analysis of ground surface pre-grouting strengthening deep fault fracture zone[J]. Chinese Journal of Rock Mechanics and Engineering,2013,32(S2):3688-3695.

[9] 郭李刚. 锚网索、注浆、U型棚复合支护在掘进巷道过断层影响区的应用[J]. 煤,2018,27(1):30-31. GUO Ligang. Application of composite mesh of anchor mesh,grouting and U-shaped shed in affected area of excavation roadway passing fault[J]. Coal,2018,27(1):30-31.

[10] 杜正发,陈志强,龙翔,等. U型金属棚锚筋喷联合支护在白源煤矿的应用[J]. 江西煤炭科技,2015(2):74-76. DU Zhengfa,CHEN Zhiqiang,LONG Xiang,et al. Application of combined support of U-type metal arch and anchoring bar shotcreting in Baiyuan colliery[J]. Jiangxi Coal Science & Technology,2015(2):74-76.

[11] 陶文斌,马海峰,罗勇,等. 大断面巷道过大落差逆断层破碎带支护技术[J]. 煤炭工程,2016,48(1):56-58. TAO Wenbin,MA Haifeng,LUO Yong,et al. Support technology for large section roadway crossing thrust fault fracture zone with large drop[J]. Coal Engineering,2016,48(1):56-58.

[12] 勾攀峰,晁建伟,孙光中. 回采巷道过断层顶板应力分布特征研究[J]. 能源技术与管理,2007(4):1-3. GOU Panfeng,CHAO Jianwei,SUN Guangzhong. Study on distribution law of roof stress of roadway cutting through fault[J]. Energy Technology and Management,2007(4):1-3.

[13] 赵伏军,谢世勇,潘建忠,等. 动静组合载荷作用下岩石破碎数值模拟及试验研究[J]. 岩土工程学报,2011,33(8):1290-1295. ZHAO Fujun,XIE Shiyong,PAN Jianzhong,et al. Numerical simulation and experimental research on rock fragmentation under dynamic-static combined loads[J]. Chinese Journal of Geotechnical Engineering,2011,33(8):1290-1295.

[14] 杨军,高文学,金乾坤. 岩石动态损伤特性实验及爆破模型[J]. 岩石力学与工程学报,2001,20(3):320-323. YANG Jun,GAO Wenxue,JIN Qiankun. Experiment on dynamic damage property of rock and new damage model for rock fragmentation by blasting[J]. Chinese Journal of Rock Mechanics and Engineering,2001,20(3):320-323.

[15] 张韵华,汪琥庭,宋立功,等. 高等工程数学[M]. 合肥:中国科学技术大学出版社,2016.

[16] LEMAITRE J. An equivalent strain hypothesis[J]. Journal of Engineering Material and Technology,1985,107(1):83-89.

[17] 王苏龙,张天仓. 红庆梁煤矿巷道过断层破碎带施工[J]. 建井技术,2016,37(6):19-21. WANG Sulong,ZHANG Tiancang. Construction of mine roadway passed through broken zone of fault in Hongqingliang mine[J]. Mine Construction Technology,2016,37(6):19-21.

[18] 蔡胜海. FLAC^3D断层模拟中接触面法与弱化法的研究及应用[D]. 徐州:中国矿业大学,2016.

[19] 史生志,蒋军,郑俊清,等. 强度折减有限元分析参数取值研究[J]. 低温建筑技术,2011,33(1):59-61. SHI Shengzhi,JIANG Jun,ZHENG Junqing,et al. Analysis on the values of parameters for strength reduction finite element method[J]. Low Temperature Architecture Technology,2011,33(1):59-61.

[20] 杨亚强. 工字钢支护巷道中防倒装置的改进及应用[J]. 河南科技,2014(13):108. YANG Yaqiang. Improvement and application of anti-dropping device in I-beam support roadway[J]. Journal of Henan Science and Technology,2014(13):108.

[21] 孟君. 单体支柱在综采大断面顺槽超前支护中的应用[J]. 山西焦煤科技,2011,35(12):9-10. MENG Jun. Technical analysis on existing problems in Zhenchengdi coal mine production[J]. Shanxi Coking Coal Science & Technology,2011,35(12):9-10.