Retracement Techniques for Working Faces with High Instability Tendency at Large Inclination in Deep Tectonic Zone

  • Liu Guolei ,
  • Liang Wenzhao ,
  • Zheng Yuchao ,
  • Hao Yong ,
  • Cui Yu
Expand
  • 1. School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, Shandong 255022, P.R. China;
    2. Panxi Coal Mine, Shandong Wanxiang Mining Co., Ltd., Jinan 271104, P.R. China

Received date: 2024-06-26

  Online published: 2025-03-12

Abstract

Retracement of large inclination in deep tectonic anomalies has a high risk of instability. Taking 6199 working face in Panxi Mine as the background, theoretical analysis, numerical simulation, combined with engineering data, were used to analyze the tendency of instability and mechanism of the working face during the retracement period. The study shows that: the working face is in a complex high-stress environment, and has a high tendency to destabilize dominated by the roof under high overburden pressure and continuous weakening of the roof support of the working face during the retracement period. The mechanical model of roof-hydraulic supports action is established, the analysis showed that avoiding basic roof broken is the key to maintain the structural balance of the roof, and the calculation method of the number of hydraulic supports left to meet the roof control is proposed, and the number of hydraulic supports left should be calculated to be not less than 48. Propose the method and scheme of controlling the roof by uniformly retaining part of the support and Active support of the working face, and analyze the effect by numerical simulation, which shows that the basic roof displacement of uniformly retaining part of the support retracted is relatively small. The analysis results of mine pressure data during the retracement of the working face show that no obvious movement of the roof rock layer occurred, and the roof control effect is good.

Cite this article

Liu Guolei , Liang Wenzhao , Zheng Yuchao , Hao Yong , Cui Yu . Retracement Techniques for Working Faces with High Instability Tendency at Large Inclination in Deep Tectonic Zone[J]. Chinese Journal of Underground Space and Engineering, 2025 , 21(1) : 214 -224 . DOI: 10.20174/j.JUSE.2025.01.24

References

[1] 何满潮, 谢和平, 彭苏萍, 等. 深部开采岩体力学研究[J]. 岩石力学与工程学报, 2005(16):2803-2813. (He Manchao, Xie Heping, Peng Suping, et al. Study of rock mechanics in deep mining engineering[J]. Chinese Journal of Rock Mechanics and Engineering, 2005(16):2803-2813. (in Chinese))
[2] 赵善坤, 齐庆新, 李云鹏, 等. 煤矿深部开采冲击地压应力控制技术理论与实践[J]. 煤炭学报, 2020, 45(增2):626-636. (Zhao Shankun, Qi Qingxin, Li Yunpeng, et al. Theory and practice of rockburst stress control technology in deep coal mine[J]. Journal of China Coal Society, 2020, 45(Supp.2):626-636. (in Chinese))
[3] 赵军利, 王文元, 杨威. 基于地质构造角度的煤与瓦斯突出机理研究进展[J]. 煤矿安全, 2022, 53(10):197-204. (Zhao Junli, Wang Wenyuan, Yang Wei. Research progress of coal and gas outburst mechanism based on geological structure[J]. Safety in Coal Mine, 2022, 53(10):197-204. (in Chinese))
[4] 谭卓英, 夏志远, 丁宇, 等. 深部岩体地应力场分异特性研究[J]. 岩石力学与工程学报, 2019, 38(增2):3330-3337. (Tan Zuoying, Xia Zhiyuan, Ding Yu, et al. Differentiation characteristics of insitu stress in deep rock[J]. Chinese Journal of Rock Mechanics and Engineering, 2019, 38(Supp.2):3330-3337. (in Chinese))
[5] 唐龙, 刘迅, 屠洪盛, 等. 采动影响下大倾角复合顶板工作面矿压规律研究[J]. 煤炭科学技术, 2022, 50(11):58-66. (Tang Long, Liu Xun, Tu Hongsheng, et al. Study on mine pressure law of compound roof working face with large dip angle under the influence of mining[J]. Coal Science and Technology, 2022, 50(11):58-66. (in Chinese))
[6] 马晋民, 邵民超, 石晋松, 等. 综采工作面支架回撤工艺研究[J]. 煤炭科学技术, 2016, 44(增1):21-23. (Ma Jinmin, Shao Minchao, Shi Jinsong, et al. Research on supports retracement process of fully-mechanized coal mining face[J]. Coal Science and Technology, 2016, 44(Supp.1):21-23. (in Chinese))
[7] 贺艳军, 宋亚新, 石占山, 等. 预掘回撤通道末采围岩破坏机制研究[J]. 中国安全科学学报, 2022, 32(2):158-166. (He Yanjun, Song Yaxin, Shi Zhansan et al. Study on the failure mechanism of withdrawal channel's surrounding rock during last mining period[J]. China Safety Science Journal, 2022, 32(2):158-166. (in Chinese))
[8] 贺艳军, 张金山, 陈凯, 等. 预掘回撤通道末采应力叠加效应及围岩破坏规律分析[J]. 重庆大学学报, 2022, 45(2):58-67. (He Yanjun, Zhang Jinshan, Chen Kai, et al. Analysis of superposition effect of stress and the failure law of surrounding rock during the last mining period of pre-excavation return channel[J]. Journal of Chongqing University, 2022, 45(2):58-67. (in Chinese))
[9] 康红普, 徐刚, 王彪谋, 等. 我国煤炭开采与岩层控制技术发展40a及展望[J]. 采矿与岩层控制工程学报, 2019, 1(02):7-39. (Kang Hongpu, Xu Gang, Wang Biaomou, et al. Firty years development and prospects of underground coal mining and strata control technologies in China[J]. Journal of Mining and Strata Control Engineering, 2019, 1(2):7-39. (in Chinese))
[10] 李勤, 吴丽丽. 综采工作面大规模液压支架压死处理[J]. 矿业工程研究, 2015, 30(1):14-17. (Li Qin, Wu Lili. Fully mechanized working face hydraulic support on large-scale processing[J]. Mining Engineering Research, 2015, 30(1):14-17. (in Chinese))
[11] 李国良, 李瑞群. 强矿压工作面回撤通道失稳机理与注浆加固技术[J]. 煤炭工程, 2021, 53(8):61-64. (Li Guoliang, Li Ruiqun. Instability mechanism and grouting reinforcement technology of retreat channel in high mine pressure working face[J]. Coal Engineering, 2021, 53(8):61-64. (in Chinese))
[12] 王中州, 李娇娇, 秦宾宾, 等. 薄基岩破碎顶板工作面回撤通道稳定性及控制研究[J]. 煤矿安全, 2021, 52(6):230-236. (Wang Zhongzhou, Li Jiaojiao, Qin Binbin, et al. Study on the stability and control of retracement channel with thin bedrock and broken roof[J]. Safety in Coal Mine, 2021, 52(6):230-236. (in Chinese))
[13] 卓俊勇, 朱涛涛, 王鹏. 大采高综采工作面回撤通道临断层围岩控制技术研究[J]. 煤炭工程, 2020, 52(2):74-79. (Zhuo Junyong, Zhu Taotao, Wang Peng. Surrounding rock control technology retracement channel near fault in high-cutting fully mechanized working face[J]. Coal Engineering, 2020, 52(2):74-79. (in Chinese))
[14] 孙长斌. 综采工作面末采巨厚层坚硬顶板控制技术[J]. 煤炭工程, 2020, 52(12):34-37. (Sun Changbin. Extra-thick hard roof controlling for end mining of fully mechanized working face[J]. Coal Engineering, 2020, 52(12):34-37. (in Chinese))
[15] 张永强, 王襄禹, 李冠军, 等. 回撤通道顶板结构失稳机理及压裂控制研究[J]. 采矿与岩层控制工程学报, 2022, 4(6):27-36. (Zhang Yongqiang, Wang Xiangyu, Li Guanjun, et al. Research on instability mechanism of the roof structure and hydraulic fracturing control technology in longwall recovery room[J]. Journal of Mining and Strata Control Engineering, 2022, 4(6):27-36. (in Chinese))
[16] 李臣, 郭晓菲, 霍天宏, 等. 预掘双回撤通道煤柱留设及其围岩稳定性控制[J]. 华中科技大学学报(自然科学版), 2021, 49(4):20-25, 31. (Li Chen, Guo Xiaofei, Huo Tianhong, et al. Coal pillar design of pre-excavated double equipment withdrawal channel and its surrounding rock stability control[J]. Journal of Huazhong University of Science and Technology (Natural Science Edition), 2021, 49(4):20-25, 31. (in Chinese))
[17] 康红普. 深部煤矿应力分布特征及巷道围岩控制技术[J]. 煤炭科学技术, 2013, 41(9):12-17. (Kang Hongpu. Stress distribution characteristics and strata control technology for roadways in deep coal mines [J]. Coal Science and Technology, 2013, 41(9):12-17. (in Chinese))
[18] 赵通, 刘长友, 弓培林. 近距离巨厚坚硬岩层破断结构及分区控制[J]. 采矿与安全工程学报, 2019, 36(4):719-727. (Zhao Tong, Liu Changyou, Gong Peilin. Roof fractured structure and zonal control of super thick and hard close rock[J]. Journal of Mining and Safety Engineering, 2019, 36(4):719-727. (in Chinese))
[19] 蔡美峰. 深部开采围岩稳定性与岩层控制关键理论和技术[J]. 采矿与岩层控制工程学报, 2020, 2(3):5-13. (Cai Meifeng. Key theories and technonogies for surrounding rock stability and ground control in deep mining [J]. Journal of Mining and Strata Control Engineering, 2020, 2(3):5-13. (in Chinese))
[20] 康红普, 吴志刚, 高富强, 等. 煤矿井下地质构造对地应力分布的影响[J]. 岩石力学与工程学报, 2012, 31(增1):2674-2680. (Kang Hongpu, Wu Zhigang, Gao Fuqiang, et al. Effect of geological structures on in-situ stress distribution in underground coal mines[J]. Chinese Journal of Rock Mechanics and Engineering, 2012, 31(Supp.1):2674-2680. (in Chinese))
[21] 王存文, 姜福兴, 刘金海. 构造对冲击地压的控制作用及案例分析[J]. 煤炭学报, 2012, 37(增2):263-268. (Wang Cunwen, Jiang Fuxing, Liu Jinhai. Analysis on control action of geologic structure on rock burst and typical cases[J]. Journal of China Coal Society, 2012, 37(Supp.2):263-268. (in Chinese))
[22] 朱权洁, 李青松, 张尔辉, 等. 采动影响下突出煤层地质异常区域的微震特征规律研究[J]. 煤炭科学技术, 2019, 47(7):39-46. (Zhu Quanjie, Li Qingsong, Zhang Erhui et al. Study on the microseismic characteristic the geologic anomaly region in coal and gas outburst seam induced by roadway excavation [J]. Coal Science and Technology, 2019, 47(7):39-46. (in Chinese))
Outlines

/