1Overburden structure evolution and pressure law of second mining in close-range coal seam groupYANG Guoshu, WANG Jianshu353-3582Mechanism and control of strata pressure behavior anomaly in fully mechanized top-coal caving face of extra-thick coal seamMA Zimin, WU Shiliang, MU Yubing, SONG Peng, WANG Qiong359-3683Mechanism and early-warning methods of roadway roof fall in coal seamZHAO Zhiqiang, MA Nianjie, LIU Hongtao, FENG Jicheng369-3764Investigation on the characteristics of excavation damaged zone and numerical simulation of contributing facotrsWANG Hongwei, ZHANG Dengqiang, JIANG Yaodong, DENG Daixin, YANG Guozhen377-3845Theoretical model of the double constant-resistance-large-deformation bolts under impact loadHAO Liangjun, GONG Weili, HE Manchao, SONG Yanqi385-3926Analysis of spatial distribution of cracks caused by hydraulic fracturing based on zero-thickness cohesive elementsLIU Quansheng, GAN Liang, WU Zhijun, ZHOU Yuan393-4027Triaxial load test study on the perturbation effect of rock rheologyWANG Bo, GAO Changyan, CHEN Xuexi, LIU Chongyang403-4118Experimental study on damage characteristics of siltstone under water actionFANG Jie, YAO Qiangling, WANG Weinan, TANG Chuanjin, WANG Guang412-4199Inversion of velocity model for complex irregular geologyJIANG Yuanjian, WANG Liguan, PENG Pingan420-42510Testing method on the effect of blasting releasing pressure based on in-seam wave velocity tomographyCONG Sen, CHENG Jianyuan, WANG Baoli, WANG Yunhong, FAN Xin426-43311Modified RHT model for numerical simulation of dynamic response of rock mass under blasting loadLING Tianlong, WANG Yutao, LIU Dianshu, LI Shenglin, LIANG Shufeng, WANG Meng434-44212Development of temperature field of multi circle freezing wall in deep alluviumJIAO Huazhe, SUN Guandong, CHEN Xinming, LI Zhenhua, REM Ansheng443-44913Mining subsidence variables and their time-space relationship descriptionDAI Huayang450-45914Development and application of coal and gas outburst test system based on gas drivenCHEN Jie, PAN Xiaokang, JIANG Deyi, YUAN Xi, JIANG Xiang, FAN Jinyang460-46815Numerical simulation of multi-hole and same delay time of cumulative blasting in coal seam and its applicationSONG Yanqi, LI Xiangshang, GUO Deyong469-47416Disturbance effects of oxidative zone induced by roof roadway drainage in gobCHU Tingxiang, CHEN Yuexia, SI Junhong475-48217Research and application of the technology of forced ventilation diversion to control and reduce dust in fully mechanized excavation faceCHEN Fang, ZHANG Sheji, MA Wei, YUAN Dijing, ZHANG Xiaotao483-48918Interpretation method of gas content in logging of Linxing block in Ordos BasinLI Zechen, DU Wenfeng, HU Jinkui, LI Dong490-49819Quantitative control technology for deep coalbed methane horizontal wells in Linfen BlockYU Lizhu, SHI Wei, YAO Xiaoli, WANG Haitao499-50420Geochemistry characteristics of rare earth elements in the Keluke Formation coal from Shihuihou Area, QinghaiXIAO Lin, ZHANG Jiawei, ZHOU Jianfei, LIU Kuo505-512 