不稳定厚煤层回采巷道极软顶板破坏规律及分级控制

doi:10.13722/j.cnki.jrme.2021.1137

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摘要煤层厚度不稳定且其顶板强度远低于煤层本身的条件下，巷道围岩普遍出现围岩大变形、顶板破裂深度大、顶板稳定性区域差异明显等难题。针对此类问题，以敏东一矿16–3煤层回采巷道极软顶板为工程背景，采用理论分析、现场实测、数值模拟等综合研究方法，实测分析不同顶煤厚度条件下回采巷道的矿压显现特点，揭示采动作用下不同顶煤厚度巷道极软顶板的破坏规律。结果表明：采动影响下，顶板的塑性破坏会越过中位坚硬煤层在顶板深部形成隔层扩展破坏区，顶煤厚度越大，隔层破坏范围越小，顶煤厚度超过5.0 m，隔层破坏现象趋于消失。大范围隔层破坏区产生伴随剧烈的变形压力，对其下位坚硬煤体产生巨大挤压作用，导致其顶板整体大变形甚至彻底失稳，是薄顶煤区域巷道顶板普遍剧烈变形破坏的内在原因。据此，以隔层破坏隐患区面积为基准，以顶煤厚度为分级指标，将16–3煤层回采巷道顶板分为3级，给出了以注浆锚索、锚索增效锚固为主导的不同级别顶板控制对策，工程应用效果良好。

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	贾后省1
	2
	张文彪1
	刘少伟1
	2
	郭志强3
	宋伟鹏3
	王银伟1
	贺德印1

关键词 ：采矿工程, 不稳定厚煤层, 极软顶板, 采动, 注浆锚索

Abstract：When the thickness of the coal seam is unstable and the strength of the roof is much lower than the coal seam，The surrounding rock of the roadway generally has problems such as large deformation of surrounding rock，large roof rupture depth，and obvious regional differences in roof stability. For such problems，taking the extremely soft roof of the mining roadway in 16–3 coal seam of Mindong No.1 Coal Mine as the engineering background，the comprehensive research methods such as theoretical analysis，field measurement and numerical simulation are adopted to analyze the characteristics of mine pressure behavior of the mining roadway under different top coal thicknesses，and reveal the failure law of the extremely soft roof of the mining roadway under different top coal thicknesses in the process of mining influence. The results show that the plastic failure of roof will pass through the medium hard coal seam to form the interlayer expansion failure zone under the mining influence. The larger the thickness of top coal is，the smaller the interlayer failure range will be. When the thickness of top coal exceeds 5.0 m，the interlayer failure phenomenon tends to disappear. The large-scale interlayer failure zone generates severe deformation pressure，which has a huge extrusion effect on the lower hard coal body，leading to the overall large deformation and even complete instability of the roof. It is the internal reason for the severe deformation and failure of the roadway roof in the thin top coal area. Accordingly，taking the area of the hidden interlayer failure as the benchmark and the thickness of the top coal as the grading index，the roof of mining roadway in 16–3 coal seam is divided into three levels. The control strategies of different roof levels dominated by grouting cable bolt and cable bolt synergistic anchoring are given，and good engineering application results have been achieved.

Key words： mining engineering unstable thickness coal seam extremely soft roof mining influence grouting cable bolt

引用本文:

贾后省1，2，张文彪1，刘少伟1，2，郭志强3，宋伟鹏3，王银伟1，贺德印1. 不稳定厚煤层回采巷道极软顶板破坏规律及分级控制[J]. 岩石力学与工程学报, 2022, 41(S2): 3306-3316.
JIA Housheng1，2，ZHANG Wenbiao1，LIU Shaowei1，2，GUO Zhiqiang3，SONG Weipeng3，WANG Yinwei1，HE Deyin1. Failure law and classification control of extremely soft roof in mining roadway of unstable thickness coal seam. , 2022, 41(S2): 3306-3316.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.1137 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/IS2/3306

[7]	马念杰，冯吉成，吕坤，等. 煤巷冒顶成因分类方法及其支护对策研究[J]. 煤炭科学技术，2015，43(6)：34–40.(MA Nianjie，FENG Jicheng，LV Kun，et al. Research on the classification method and support countermeasures of roof fall in coal roadway[J]. Coal Science and Technology，2015，43(6)：34–40.(in Chinese))
[18]	康红普，林健，杨景贺，等. 松软破碎硐室群围岩应力分布及综合加固技术[J]. 岩土工程学报，2011，33(5)：808–814.(KANG Hongpu，LIN Jian，YANG Jinghe，et al. Rich and strong.Stress distribution and comprehensive reinforcement technology of surrounding rock of soft broken chamber group[J]. Chinese Journal of Geotechnical Engineering，2011，33(5)：808–814.(in Chinese))
[26]	李磊，柏建彪，王襄禹，等. 松软破碎煤巷注浆加固技术与应用[J]. 煤炭科学技术，2010，38(8)：5–9.(LI Lei，BAI Jianbiao，WANG Xiangyu，et al. Soft broken coal roadway grouting reinforcement technology and application[J]. Coal Science and Technology，2010，38(8)：5–9.(in Chinese))
[28]	孔祥言. 高等渗流力学[M]. 合肥：中国科学技术大学出版社，1999：395–425.(KONG Xiangyan. Higher seepage mechanics[M]. Hefei：China University of Science and Technology Press，1999：395–425.(in Chinese))
[23]	米海珍. 弹性力学[M]. 重庆：重庆大学出版社，2001：4–11.(MI Haizhen. Elastic mechanics[M]. Chongqing：Chongqing University Press，2001：4–11.(in Chinese))
[2]	CHENG X，ZHAO G M，LI Y M，et al. Key technologies and engineering practices for soft-rock protective seam mining[J]. International Journal of Mining Science and Technology，2020，30(6)：889–899.
[4]	李磊，文志杰. 软岩反底拱优化加固技术及应用—以上海庙矿区为例[J]. 煤炭学报，2021，46(4)：1 242–1 252.(LI Lei，WEN Zhijie. Optimized reinforcement technology and application of soft rock inverted arch--Taking Shanghai Miao mining area as an example[J]. Journal of China Coal Society，2021，46(4)：1 242–1 252.(in Chinese))
[6]	赵志强，马念杰，刘洪涛，等. 巷道蝶形破坏理论及其应用前景[J]. 中国矿业大学学报，2018，47(5)：969–978.(ZHAO Zhiqiang，MA Nianjie，LIU Hongtao，et al. The butterfly failure theory of roadway and its application prospect[J]. Journal of China University of Mining and Technology，2018，47(5)：969–978.(in Chinese))
[10]	何满潮，袁越，王晓雷，等. 新疆中生代复合型软岩大变形控制技术及其应用[J]. 岩石力学与工程学报，2013，32(3)：433–441. (HE Manchao，YUAN Yue，WANG Xiaolei，et al. Xinjiang Mesozoic composite soft rock large deformation control technology and its application[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(3)：433–441.(in Chinese))
[11]	王炯，张正俊，朱天赐，等. 恒阻大变形锚索支护巷道变形机制模型试验研究[J]. 岩石力学与工程学报，2020，39(5)：927–937. (WANG Jiong，ZHANG Zhengjun，ZHU Tianci，et al. Constant resistance large deformation anchor cable supporting roadway deformation mechanism model test research[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(5)：927–937.(in Chinese))
[13]	孟庆彬，钱唯，韩立军，等. 软弱矿体中巷道围岩稳定控制技术及应用[J]. 采矿与安全工程学报，2019，36(5)：906–915.(MENG Qingbin，QIAN Wei，HAN Lijun，et al. Stability control technology and application of roadway surrounding rock in weak orebody[J]. Journal of Mining and Safety Engineering，2019，36(5)：906–915.(in Chinese))
[15]	康红普，姜鹏飞，杨建威，等. 煤矿千米深井巷道松软煤体高压锚注–喷浆协同控制技术[J]. 煤炭学报，2021，46(3)：747–762.(KANG Hongpu，JIANG Pengfei，YANG Jianwei，et al. High-pressure bolting-grouting collaborative control technology for soft coal mass in deep roadway of coal mine[J]. Journal of China Coal Society，2021，46(3)：747–762.(in Chinese))
[17]	康红普. 我国煤矿巷道围岩控制技术发展70年及展望[J]. 岩石力学与工程学报，2021，40(1)：1–30.(KANG Hongpu. China coal mine roadway surrounding rock control technology development for 70 years and prospects[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(1)：1–30.(in Chinese))
[21]	李季，彭博，袁鹏. 深部沿空巷道顶板蝶叶塑性区“低阻微变”性形成机制研究[J]. 采矿与安全工程学报，2019，36(3)：465– 472.(LI Ji，PENG Bo，YUAN Peng. Study on the formation mechanism of low resistance slight change in the plastic zone of butterfly leaf in the roof of deep gob-side entry[J]. Journal of Mining and Safety Engineering，2019，36(3)：465–472.(in Chinese))
[22]	贾后省，潘坤，刘少伟，等. 采动巷道煤帮变形破坏规律与控制技术[J]. 采矿与安全工程学报，2020，37(4)：689–697.(JIA Housheng，PAN Kun，LIU Shaowei，et al. Deformation and failure law and control technology of coal side in mining roadway[J]. Journal of Mining and Safety Engineering，2020，37(4)：689–697.(in Chinese))
[24]	杨秀竹，王星华，雷金山. 宾汉体浆液扩散半径的研究及应用[J]. 水利学报，2004，35(6)：75–79.(YANG Xiuzhu，WANG Xinghua，LEI Jinshan. Research and application of grout diffusion radius of Bingham body[J]. Journal of Water Conservancy，2004，35(6)：75–79.(in Chinese))
[29]	JIA H S，WANG Y W，LIU S W，et al. Experimental study of stirring and resin-blocking devices for improving the performance of resin- anchored cable bolts[J]. Rock Mechanics and Rock Engineering，2021，54：3 995–4 008.
[1]	ZHAN Q，ZHENG X，DU J，et al. Coupling instability mechanism and joint control technology of soft-rock roadway with a buried depth of 1 336 m[J]. Rock Mechanics and Rock Engineering，2020，53(7)：2 233–2 248.
[3]	YUAN Y，ZHU Y J，WANG W J，et al. Failure mechanism of Mesozoic soft rock roadway in Shajihai coal mine and its surrounding rock control[J]. International Journal of Mining Science and Technology，2014，24(6)：853–858.
[5]	马念杰，李季，赵志强. 圆形巷道围岩偏应力场及塑性区分布规律研究[J]. 中国矿业大学学报，2015，44(2)：206–213.(MA Nianjie，LI Ji，ZHAO Zhiqiang. Study on the distribution of deviatoric stress field and plastic zone of surrounding rock of circular roadway[J]. Journal of China University of Mining and Technology，2015，44(2)：206–213.(in Chinese))
[8]	王卫军，董恩远，袁超. 非等压圆形巷道围岩塑性区边界方程及应用[J]. 煤炭学报，2019，44(1)：105–114.(WANG Weijun，DONG Enyuan，YUAN Chao. The boundary equation of plastic zone in surrounding rock of non-isobaric circular roadway and its application[J]. Journal of China Coal Society，2019，44(1)：105–114.(in Chinese))
[9]	何满潮，陈新，梁国平，等. 深部软岩工程大变形力学分析设计系统[J]. 岩石力学与工程学报，2007，26(5)：934–943.(HE Manchao，CHEN Xin，LIANG Guoping，et al. Large deformation mechanical analysis and design system for deep soft rock engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(5)：934–943.(in Chinese))
[12]	孟庆彬，孙稳，韩立军，等. 深井软岩巷道群掘进扰动效应与控制技术研究[J]. 采矿与安全工程学报，2021，38(3)：496–506. (MENG Qingbin，SUN Wen，HAN Lijun，et al. Study on tunneling disturbance effect and control technology of deep soft rock roadway group[J]. Journal of Mining and Safety Engineering，2021，38(3)：496–506.(in Chinese))
[14]	孟庆彬，韩立军，张帆舸，等. 深部高应力软岩巷道耦合支护效应研究及应用[J]. 岩土力学，2017，38(5)：1 424–1 435.(MENG Qingbin，HAN Lijun，ZHANG Fange，et al. Research and application of coupling support effect of deep high stress soft rock roadway[J]. Geotechnical mechanics，2017，38(5)：1 424–1 435.(in Chinese))
[16]	HONGPU，KANG，JIANZHONG，et al. Investigation on the influence of abutment pressure on the stability of rock bolt reinforced roof strata through physical and numerical modeling[J]. Rock Mechanics and Rock Engineering，2016，50(2)：1–15.
[19]	马念杰，赵希栋，赵志强，等. 深部采动巷道顶板稳定性分析与控制[J]. 煤炭学报，2015，40(10)：2 287–2 295.(MA Ninjie，ZHAO Xidong，ZHAO Zhiqiang，et al. Analysis and control of roof stability of deep mining roadway[J]. Journal of China Coal Society，2015，40(10)：2 287–2 295.(in Chinese))
[20]	赵志强，马念杰，刘洪涛，等. 煤层巷道冒顶机制与预警方法[J]. 煤炭学报，2018，43(增2)：369–376.(ZHAO Zhiqiang，MA Nianjie，LIU Hongtao，et al. Mechanism and early warning method of coal seam roadway roof fall[J]. Journal of China Coal Society，2018，43(Supp.2)：369–376.(in Chinese))
[25]	阮文军. 基于浆液粘度时变性的岩体裂隙注浆扩散模型[J]. 岩石力学与工程学报，2005，24(15)：2 709–2 714.(RUAN Wenjun. Grouting diffusion model of rock fracture based on time-varying slurry viscosity[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(15)：2 709–2 714.(in Chinese))
[27]	凌贤长，蔡德所. 岩体力学[M]. 哈尔滨：哈尔滨工业大学出版社，2002：11–20.(LING Xianchang，CAI Desuo. Rock mechanics[M]. Harbin：Harbin Institute of Technology Press，2002：11–20.(in Chinese))