CHARACTERISTICS AND CONTROL METHOD OF FLOOR HEAVE IN GOB-SIDE ENTRY RETAINING
XU Ying1，ZHOU Hui2，BAI Jianbiao1，CHEN Jin1
(1. School of Mines，China University of Mining and Technology，Xuzhou，Jiangsu 221116，China； 2. Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China)
Abstract：The observation results of floor heave in the engineering practices of gob-side entry retaining show that floor heave mainly occurs between the first mining period and the second mining period. The floor heave amount is several hundred millimeters，account for 70% of convergence between roof and floor. The cause of floor heave is discussed. Concretely，the floor rockmass is broken after the first mining and then undergo post-peak creep under the action of the first and second mine-induced stress. The floor heave amount is affected by the lithology and stress environment of floor rockmass. Generally，it increases rapidly as the increase of broken degree and principle stress difference. Based on the characteristics of floor heave，the bolt method and steel pile method are proposed to control floor heave. The bolt method can reduce the floor heave amount by its anchoring force，while the steel pile method by its high deformation resistivity and stress arch. The control effect of latter is more significant. The technology of gob-side entry retaining can be further improved to increase the value of its engineering application by the research results.
陆士良．无煤柱护巷的矿压显现[M]. 北京：煤炭工业出版社，1982：117-120.(LUShiliang. Strata behaviors of roadway without coal pillar[M].Beijing：China Coal Industry Publishing House，1982：117-120.(in Chinese))
[2]
孙恒虎，赵炳利. 沿空留巷的理论与实践[M]. 北京：煤炭工业出版社，1993：133-137.(SUNHenghu，ZHAO Bingli. The theory and practice of gob-side entry retaining[M]. Beijing：China Coal Industry Publishing House，1993：133-137.(in Chinese))
[3]
康红普，牛多龙，张 镇，等. 深部沿空留巷围岩变形特征与支护技术[J]. 岩石力学与工程学报，2010，29(10)：1 977-1 987.(KANGHongpu，NIUDuolong，ZHANGZhen，et al. Deformation characteristics of surrounding rock and supporting technology of gob-side entry retaining in deep coal mine[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(10)：1977-1987.(in Chinese))
姜耀东，赵毅鑫，刘文岗，等. 深部开采中巷道底臌问题的研究[J]. 岩石力学与工程学报，2004，23(7)：2 396-2 401.(JIANG Yaodong，ZHAO Yixin，LIU Wengang，et al.Research on floor heave of roadway in deep mining[J].Chinese Journal of Rock Mechanics and Engineering，2004，23(7)：2 396-2 401.(in Chinese))
[6]
初明祥，王清标，夏均民. 采空侧巷道底鼓形成机制与防治技术研究[J]. 岩土力学，2011，32(增2)：413-417.(CHU Mingxiang，WANG Qingbiao，XIA Junmin. Study of formation mechanism of floor heave at goaf side of roadway and prevention technology[J]. Rock and Soil Mechanics，2011，32(Supp.2)：413-417.(in Chinese))
[7]
柏建彪，李文峰，王襄禹，等. 采动巷道底鼓机制与控制技术[J]. 采矿与安全工程学报，2011，28(1)：1-5.(BAI Jianbiao，LI Wenfeng，WANG Xiangyu，et al. Mechanism of floor heave and control technology of roadway induced by mining[J]. Journal of Mining and Safety Engineering，2011，28(1)：1-5.(in Chinese))
[8]
华心祝，卢小雨，李迎富. 深井大断面沿空留巷底鼓防控技术[J]. 煤炭科学技术，2013，41(9)：100-104.(HUA Xinzhu，LU Xiaoyu，LI Yingfu. Prevention and control technology of floor heave in gob-side entry retaining with large section of deep mine[J]. Coal Science and Technology，2013，41(9)：100-104.(in Chinese))
[9]
林东才，魏夕合，许春兆，等. 深井膨胀型软岩底板沿空留巷底鼓类型及变形机制研究[J]. 矿业研究与开发，2013，33(1)：23-26.(LIN Dongcai，WEI Xihe，XU Chunzhao，et al. Research on the type and deformation mechanism of floor heave of swellingsoft rock roadway along goaf in deep mine[J]. MingResearch and Development，2013，33(1)：23-26.(in Chinese))
[10]
魏夕合，林东才，许春兆. 深部沿空留巷底板受力及变形特征分析[J]. 工业安全与环保，2013，3(1)：4-6.(WEI Xihe，LIN Dongcai，XU Chunzhao. The floor stress and deformation characteristics of deep roadway along goaf[J]. Industrial Safety and Environmental Protection，2013，3(1)：4-6.(in Chinese))
[11]
贾 民，柏建彪，田 涛，等. 墩柱式沿空留巷技术研究[J]. 煤炭科学技术，2014，42(1)：18-22.(JIA Min，BAI Jianbiao，TIAN Tao，et al. Research on pier column gob-side entry retaining technology[J]. Coal Science and Technology，2014，42(1)：18-22.(in Chinese))
[12]
钱鸣高，石平五. 矿山压力与岩层控制[M]. 徐州：中国矿业大学出版社，2003：185-187.(QIANG Minggao，SHI Pingwu. Miningpressure and strata control[M]. Xuzhou：China University of Mining and Technology Press，2003：185-187.(in Chinese))
[13]
段宏飞. 底板破坏深度六因素线性预测模型[J]. 岩土力学，2014，35(11)：3 323-3 330.(DUAN Hongfei. Six factors linear prediction model on depth of damage floor[J]. Rock and Soil Mechanics，2014，35(11)：3 323-3 330.(in Chinese))
[14]
李兴高，高延法. 采场底板岩层破坏与损伤分析[J]. 岩石力学与工程学报，2003，22(1)：35-39.(LI Xinggao，GAO Yanfa. Damage analysis of floorstrata[J]. Chinese Journal of Rock Mechanics andEngineering，2003，22(1)：35-39.(in Chinese))
[15]
程久龙，于师建，宋 扬，等. 煤层底板破坏深度的声波CT探测试验研究[J]. 煤炭学报，1999，24(6)：576-580.(CHENG Jiulong，YU Shijian，SONG Yang，et al.Detection of the failure depth of coal seam floor byacoustic wave computer topography[J]. Journal of ChinaCoal Society，1999，24(6)：576-580.(in Chinese))
[16]
刘传孝，黄东辰，张秀丽，等. 深井泥岩峰前/峰后单轴蠕变特征实验研究[J]. 实验力学，2011，26(3)：267-273.(LIU Chuanxiao，HUANG Dongchen，ZHANG Xiuli，et al. Experimental study of uniaxial creep properties of mudstone in deep site front and rear the ultimate strength[J].Journal of Experimental Mechanics，2011，26(3)：267-273.(in Chinese))
[17]
平 洋，李树忱，汪 雷. 贯通节理砂岩峰后变形试验研究及其在隧道支护中的应用[J]. 煤炭学报，2014，39(4)：644-650.(PING Yang，LI Shuchen，WANGLei．Experimental study of post-peak deformation of sandstone with pre-existing transfixion joint and its application in tunnel support[J]. Journal of China Coal Society，2014， 39(4)：644-650.(in Chinese))
[18]
侯朝炯，郭励生，勾攀峰，等. 煤巷锚杆支护[M]. 徐州：中国矿业大学出版社，1999：10-17.(HOU Chaojiong，GUO Lisheng，GOU Panfeng，et al. Bolt supporting in coal roadway[M]. Xuzhou：China University of Mining and Technology Press，1999：10-17.(in Chinese))
2015, Vol. 34 
