1The practical observation research on loose medium flow field theory on the top-coal cavingWANG Jia-chen, YANG Jian-li, LIU Hao-hao, ZHAO Da-peng, ZHENG Li-yong353-3562Deformation characteristic of key stratum overburden by raw waste backfilling with fully-mechanized coal minning technologyZHANG Ji-xiong, LI Jian, AN Tai-long, HUANG Yan-li357-3623Quantitative discrimination of critical depth in deep exploitation in Fushun coalfieldLI Tie, CAI Mei-feng, JI Hong-guang363-3674Dynamic optimization for open pit mining limitYANG Biao, LUO Zhou-quan, LIAO Jiang-nan, WU Xiu-qiong, LIU Xiao-ming368-3725Mathematic model of air-lift in borehole hydraulic jet miningPEI Jiang-hong, LIAO Zhen-fang373-3766Exothermic reaction controlling technology and curing characteristics of polymer foam materialsDONG Jun, LIU Guo-zhong, LIU Zhao-wen377-3807Deterioration elasto-plastic analysis of cracked surrounding rocks based on unified strength theoryZHANG Qiang, WANG Hong-ying, WANG Shui-lin, GE Xiu-run, SHAO Gang381-3868The deformation properties of mudstone and numerical calculation based on unloading pathLI Dong-wei, WANG Ren-he, FAN Ju-hong387-3919In situ direct shear tests on the large-scale accumulation body and three-dimensional stability analysis of the slopeYANG Ji-hong, DONG Jin-yu, LIU Han-dong, HUANG Zhi-quan, JIANG Tong392-39610Viscoelastic analysis of heterogeneous frozen wall in deep alluviumZHONG Gui-rong, ZHOU Guo-qing, WANG Jian-zhou, SHANG Xiang-yu397-40111Controlling earth pressure of head chamber of earth pressure balance (EPB) shield machineSHANGGUAN Zi-chang, LI Shou-ju, SUN Wei, LUAN Mao-tian, LIU Bo402-40512The evolution of permeability and gas extraction technology in mining coal seamWANG You-gang, LI Hong-yan, QI Qing-xin, PENG Yong-wei, LI Chun-rui, DENG Zhi-gang406-41013The change and distribution law of outburst coal seam permeability induced by drilling an extra-thin protective coal seamLIU Hai-bo, CHENG Yuan-ping, SONG Jian-cheng, SHANG Zheng-jie411-41614Laws of floor breaking in coal mining face and gas extraction applicationXIAO Fu-kun, DUAN Li-qun, GE Zhi-hui417-41915Optical fiber methane gas sensor based on refractive index change of sensing filmYANG Jian-chun, XU Long-jun, CHEN Wei-min420-42316The structural optimization and numerical simulation of wet centrifugal precipitator at working face of diving airwayLIU Jian, YAO Hai-fei, WEI Chuan-guang, JIN Long-zhe, LI Jie-nan424-42817Independent & disjoin path method of diagonal branches in undirected graphSI Jun-hong, CHEN Kai-yan429-43318The infiltration equation of coal bed under the cooperation of stress field, temperature field and sound fieldJIANG Yong-dong, YANG Xing-yang, XIAN Xue-fu, XIONG Ling, YI Jun434-43819Laboratory studies on control coal bed methane formation damage by Fuzzy-Ball based drilling fluidsZHENG Li-hui, MENG Shang-zhi, CAO Yuan, LI Zhong-feng439-44220Disaster mechanism of karst water bursting in mineWANG Wei-jun, ZHAO Yan-Lin, LI Qing-feng, PENG Wen-qing443-448 