1Rationality and comprehensive unloading technology of deep high stress section coal pillarsQI Hegang, YU Jianhao3257-32642Post-peak progressive failure characteristics and nonlinear model of coal-rock combined bodyZUO Jianping, SONG Hongqiang, CHEN Yan, LI Yanhong3265-32723First fracturing of thin plate of main roof with elastic foundation boundary on both sides of the long side of goaf (coal pillars)CHEN Dongdong, XIE Shengrong, HE Fulian, ZENG Junchao, XIE Fuxing, CHENG Qiong3273-32854Analysis of fault separation generation and its increasing effect on mining zoneYU Qiuge, ZHANG Huaxing, DENG Weinan, ZOU Youping3286-32925Effect of strength criteria on surrounding rock of circular roadway considering strain softening and dilatancyPAN Jiliang, GAO Zhaoning, REN Fenhua3293-33016Rock-burst mechanism and prevention of clamping coal in mining near-vertical coal seam with horizontal slice methodLI Anning, DOU Linming, WANG Zhengyi, XIE Jiahao, WANG Yongzhong3302-33087Reasonable pre-tightening force of bolt based on the theory of stress gradientWEN Zhijie, ZHANG Ruixin, YANG Tao, CHEN Lianjun, JIANG Yujing, TAN Yunliang, CHEN Jie, CHEN Ai3309-33198Load and instability characteristics of support in large mining height fully-mechanized face in steeply dipping seamLUO Shenghu, WU Yongping, XIE Panshi, WANG Hongwei, LIU Baoheng, LI Ang3320-33289Elasto-analysis for a deep tunnel considering intermediate stress and strain-softening behaviorWANG Fengyun, QIAN Deling3329-333710Effect of fracture number and aperture on mechanical properties and failure modes of low-strength rock massWANG Yanlei, TANG Jianxin, DAI Zhangyin, YI Ting, LI Xinyi3338-334711Comparative experimental study on the measurement of type-Ⅰ dynamic stress intensity factor using different distance strain gagesLI Qing, YU Qiang, XU Wenlong, TIAN Qiushi, WANG Xiaodong3348-335512A new 3D roughness parameter system for rock jointBAN Liren, QI Chengzhi, SHAN Renliang, TAO Zhigang, JIANG Kuan, CHENG Yang3356-336313Energy evolution mechanism of shaft wall concrete under uniaxial loading and unloading compressionLIU Juanhong, ZHOU Yucheng, JI Hongguang3364-337014Strength and yield characteristics of cinder improved soil under freeze-thaw cyclesZHANG Xiangdong, REN Kun3371-337815Parameter calculation method for optimized segmented Knothe time functionZHANG Bing, CUI Ximin, ZHAO Yuling, LI Chunyi3379-338616Characteristics of wave velocity and power spectral density of hole-containing specimens under water conditionsZHANG Tianjun, ZHANG Lei, LI Shugang, LIU Jialei, JI Xiang, PAN Hongyu3387-339417Experimental study on evolutionary characteristics of pore-fissure structure in coal seam under temperature impactWANG Dengke, ZHANG Ping, LIU Shumin, WEI Jianping, YU Chong, SUN Liutao3395-340318Gas emission characteristics of tectonic coal and microscopic explanation of pore structureZHANG Huijie, ZHANG Lang, WANG Dong, HOU Jinling3404-341019Development and application of a three-dimensional measurement device for gas concentrationZHAO Hongbao, ZHANG Huan, WANG Hongbing, ZHANG Mian, LI Bingwei, WEI Ziqiang, ZOU Youping3411-341820Effect of plasma treatment sequence on performance of CuO/Al2O3 catalyst in combustion of methane in ventilation airZHU Lihua, BI Fangqiang, LI Fan, TIAN Yaoyao, XU Feng3419-3424 