Instability factors and control technology for roadway with extra-thick mudstone roof

doi:10.16265/j.cnki.issn1003-3033.2018.05.025

Abstract

Abstract: In order to study the instability factors and sensitivity of roadways with extra-thick mudstone roof,six instability factors were obtained by carrying out field investigation and theoretical analysis.Panel 15107 in Huangyanhui colliery was taken as engineering background,orthogonal experiments of six factors and three levels were carried out using finite difference software FLAC5.0,and significant instability factors were investigated by using variance analysis.Targeted control measures were put forward and field application was carried out.The results show that the significance sequence of instability factors affecting the deformation of extra-thick mudstone roof is as follows: immediate roof strength,roadway width,roof support strength,immediate roof thickness,rib support strength and coal seam strength,and the immediate roof strength,roof support strength and roadway width have a significant influence on the roof deformation,while the most significant factor affecting the roadway rib stability is coal seam strength and rib support strength.The support principle that intensifies the roof strength,and controls the surroundings rock and the roof together was proposed.The field application effect is good,and there is no supporting structure failure phenomenon.

Key words: extra-thick mudstone roof, orthogonal experiment, sensitivity, numerical simulation, variance analysis

CLC Number:

X936

MA Zhenqian, LIU Yong, LIU Qinzhi, HAN Sen, CHEN Chuan. Instability factors and control technology for roadway with extra-thick mudstone roof[J]. China Safety Science Journal, 2018, 28(5): 147-152.

References

[1] 贾明魁.岩层组合劣化型冒顶机制研究[J].岩土力学,2007,28(7):1343-1347.
JIA Mingkui.Research on roof falling mechanism of deteriorative strata combination supported by bolts[J].Rock and Soil Mechanics,2007,28(7):1343-1347.
[2] 苏学贵,宋选民,李浩春,等.特厚松软复合顶板巷道拱-梁耦合支护结构的构建及应用研究[J].岩石力学与工程学报,2014,33(9):1828-1836.
SU Xuegui,SONG Xuanmin,LI Haochun,et al.Study on coupled arch-beam support structure of roadway with extra-thick soft compound roof[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(9):1828-1836.
[3] 余伟健,王卫军,张农,等.深井煤巷厚层复合顶板整体变形机制及控制[J].中国矿业大学学报,2012,41(5):725-732.
YU Weijian,WANG Weijun,ZHANG Nong,et al.Study of global deformation and control of a thick,layered compound roof in a deep well[J].Journal of China University of Mining & Technology,2012,41(5):725-732.
[4] 郜进海,康天合,靳钟铭,等.巨厚薄层状顶板回采巷道围岩裂隙演化规律的相似模拟试验研究[J].岩石力学与工程学报,2004,23(19):3 292-3 297.
GAO Jinhai,KANG Tianhe,JIN Zhongming,et al.Similar simulation study on crack development law of surrounding rocks of roadway with great-thick thin-bedded top roof[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(19):3 292-3 297.
[5] 马振乾,姜耀东,吴桂义,等.厚层泥质顶板巷道支护难度分级研究与应用[J].中国安全科学学报,2017,27(11):121-125.
MA Zhenqian,JIANG Yaodong,WU Guiyi,et al.Research on support difficulty classification for roadways with thick mudstone roof and its application[J].China Safety Science Journal,2017,27(11):121-125.
[6] 杨永康,季春旭,康天合,等.大厚度泥岩顶板煤巷破坏机制及控制对策研究[J].岩石力学与工程学报,2011,30(1):58-67.
YANG Yongkang,JI Chunxu,KANG Tianhe,et al.Damage mechanisms of mudstone roof with great-thick in coal roadway and its controlling countermeasures[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(1):58-67.
[7] 李学华,梁顺,姚强岭,等.泥岩顶板巷道围岩裂隙演化规律与冒顶机理分析[J].煤炭学报,2011,36(6):903-908.
LI Xuehua,LIANG Shun,YAO Qiangling,et al.Analysis on fissure-evolving law and roof-falling mechanism in roadway with mudstone roof[J].Journal of China Coal Society,2011,36(6):903-908.
[8] 高明仕,郭春生,李江锋,等.厚层松软复合顶板煤巷梯次支护力学原理及应用[J].中国矿业大学学报,2011,40(3):333-338.
GAO Mingshi,GUO Chunsheng,LI Jiangfeng,et al.Mechanical principles and application of a multi-length support technology to a coal roadway with thick soft combined roof during deep mining[J].Journal of China University of Mining & Technology,2011,40(3):333-338.
[9] 高富强,王兴库.岩体力学参数敏感性正交数值模拟试验[J].采矿与安全工程学报,2008,25(1):95-98.
GAO Fuqiang,WANG Xingku.Orthogonal numerical simulation on sensitivity of rock mechanical parameters[J].Journal of Mining & Safety Engineering,2008,25(1):95-98.
[10] 马振乾.厚层软弱顶板巷道灾变机理及控制技术研究[D].北京:中国矿业大学(北京),2016.
MA Zhenqian.Deformation mechanism and its control in roadways with thick soft roof[D].Beijing:China University of Mining & Technology(Beijing),2016.
[11] 单仁亮,孔祥松,蔚振廷,等.煤巷强帮支护理论与应用[J].岩石力学与工程学报,2013,32(7):1304-1314.
SHAN Renliang,KONG Xiangsong,WEI Zhenting,et al.Theory and application of strong support for coal roadway sidewall[J].Chinese Journal of Rock Mechanics and Engineering,2013,32(7):1304-1314.

[1]	LI Gang, LIU Haizhen, YANG Qinghe, NIU Weifeng. Analysis on failure characteristics of coal seam floors and water inrush risks in mining under pressure [J]. China Safety Science Journal, 2022, 32(5): 68-76.
[2]	HE Xin, MA Yilong. Study on wake safety intervals of PA based on CFD [J]. China Safety Science Journal, 2022, 32(5): 77-83.
[3]	ZHENG Aichen, XIANG Jinyang, HUANG Feng, JIN Chenghao, LIU Xingchen. Test and simulation of influence of voids on tunnel structure safety [J]. China Safety Science Journal, 2022, 32(5): 119-126.
[4]	YOU Bo, MAO Cong, SHI Shiliang, LIU Heqing, LU Yi, LI Min. Research on change characteristics of environment in micro space of mine ventilation suits [J]. China Safety Science Journal, 2022, 32(5): 185-193.
[5]	FENG Gong, XIA Yuanyou, WANG Zhide, YAN Minjia. Dynamic early warning method of open-pit mine slopes based on integrated displacement information [J]. China Safety Science Journal, 2022, 32(3): 116-122.
[6]	LU Yi, YANG Fan, LIU Huan, CHEN Jian, WANG Jinpeng, LI Wenhui. Thermal resistance calculation of aerogel fire-fighting clothing lining [J]. China Safety Science Journal, 2022, 32(1): 201-207.
[7]	ZHONG Kaiqi, XIAO Yang, LU Xing,DENG Jun. Orthogonal experiment design and range analysis of TPCT extracting thermal energy from coal fire [J]. China Safety Science Journal, 2021, 31(9): 135-141.
[8]	ZHANG Junxiang, LIU Yanwei, REN Peiliang, HAN Hongkai, ZUO Weiqin. Optimization and experimental study of sealing parameters of crossing boreholes based on creep effect [J]. China Safety Science Journal, 2021, 31(7): 97-104.
[9]	DING Houcheng, LIAN Zhixu, DENG Quanlong, JIANG Zhongan, YANG Liwei, GE Mengyuan. Research on dust removal characteristics under synergistic action of vibrating wire grid and high-pressure spray [J]. China Safety Science Journal, 2021, 31(6): 106-112.
[10]	JING Deji, JIA Xin, ZHANG Tian, MENG Xiangxi, MA Mingxing, WANG Zhiheng. Numerical simulation and experimental study on vortex blowing and suction dedusting technology during coal falling [J]. China Safety Science Journal, 2021, 31(6): 121-127.
[11]	JIANG Xin, LI Xuelian, WU Jinghan, LI Wei, LUO Dongli, FEI Fan. SD model of social stability risk evolution for sensitive water conservancy projects [J]. China Safety Science Journal, 2021, 31(4): 18-26.
[12]	ZHU Haohao, GUO Hailin, ZHUMAKELDI A. Research on crack propagation of pipeline inner surface defect under external force [J]. China Safety Science Journal, 2021, 31(3): 66-72.
[13]	JIANG Xuepeng, CHEN Xin'ge, GUO Kun. Study on critical velocity of lateral point smoke extraction tunnel fire [J]. China Safety Science Journal, 2021, 31(3): 105-111.
[14]	WANG Liang, SUN Yimin, CHU Peng, ZHAO Wei, ZOU Shuangying. Study on accuracy of coal seam gas pressure measurement based on its spatial and temporal distribution characteristics [J]. China Safety Science Journal, 2021, 31(2): 40-47.
[15]	ZHANG Meng, LIU Honglei, QIAO Wenguang, GAO Xun. Significant research on influencing factors of dump stability [J]. China Safety Science Journal, 2021, 31(2): 69-75.