1Research on the mechanism of intelligent sensing and adaptive control in drilling condition of drilling robotWANG Qingfeng, CHEN Hang, CHEN YutaoSpecial Column1-52Study on the synergistic inhibition of coal spontaneous combustion by MgCl2 and carbon/oxygen radical scavengersWANG Jie, LI Kun, ZHANG Yulong, WANG Junfeng, ZHOU ChunshanTest Research6-11,163Effect of weak acid and surfactant on coal pore and fractal characteristicsDU Haigang, SONG Jianwei, XIE Jun, YANG Junwei, FENG ShanTest Research12-164Study on gas distribution law in working face with Y-type ventilation of thin coal seamLI Liangwei, WU Wenbin, LIN FujinTest Research17-21,265Analysis of experiment pressurization method of coal and gas outburst and its influence on coal stressCHENG LiTest Research22-266Study on antireflection technology of multi-component acid fracturing in low permeability coal seamJIA NanTest Research27-327Comparison test of the proportion of coal seam group combined extraction gas mixed sourceDING Hong, WU Jiaokun, FENG Renjun, WEI LeTest Research33-388Study on the effect of heat pipe filling rate on the internal temperature field of high temperature coal pileWANG Jianguo, ZHOU Tongzhu, ZHENG ChenguangTest Research39-429Numerical simulation and actual measurement analysis of overburden failure height based on PFCSHI LeiTest Research43-49,5510Research on coal and gangue identification method based on improved YOLOv3LEI Shiwei, XIAO Xingmei, ZHANG MingTest Research50-5511Similar simulation study on the flow field structure and the law of dust settlement of heading roadwayWANG MianTest Research56-6112Research and application of grouting reinforcement technology for surrounding rock of deep roadway with large sectionMA Xinshi, GONG Peilin, LI ChaoApplication Techniques62-6713Analysis of surface subsidence in Shuixigou sealed fire area by using D-InSAR technologyYANG Jie, ZENG QiangApplication Techniques68-7314Study on the optimization simulation and application of technical parameters of CO2 injection for fire prevention in goaf in 8059 working face of Yaoqiao Coal MineJIANG Kui, WANG Yi, REN Guangyi, YAO Xiangdong, WU KuibinApplication Techniques74-78,8415Research and application on roadway protection technology of small coal pillar with pressure relief by roof cutting in pit with large mining heightLIANG Jie, ZHANG Lei, XU Qingyun, MAO HuajinApplication Techniques79-8416Exploration and application of determination method of sensitive index for prediction of coal and gas outburstQI Liming, LU Yunting, GUAN Lianhe, QI MingTechnical Experience85-8917The effect of unstable flow hydraulic fracturing on antireflection of deep low permeability coal seamHE MingchuanTechnical Experience90-93,9918Application of multi-parameter outburst warning technology based on gas geological characteristics in Xinjian Coal MineYAO YahuTechnical Experience94-9919The ground directional drilling and grouting technology applied to thin limestone in structural development areaSUN Xiaoyu, YANG Xue, TIAN LeTechnical Experience100-105,11120Study on risk assessment and adaptability evaluation of regional geological hazards in the northern part of goaf in Fushun west surface mineCHEN YuIssue Discussion106-111 