1Research on mining pressure manifestation and control technology of lower coal seams in thin coal seam groupsHui Zhaohui, Lu Huixing, Zhong Deyu, Ren QinhuaQuestion Discussion1-72Analysis and optimization of coal seam drilling pressure relief efficiency in impact hazardous areasCao Yuanwei, Li Gelin, Qi Zhengbing, Deng YiQuestion Discussion8-14,203Research on deformation mechanism and modification-supporting technology of deep high stress repair roadwayYao YanbinQuestion Discussion15-204Research on development law of water conducted zones in weakly cemented soft rock roof of coal seamsWang Xiurui, Ma JieQuestion Discussion21-265Study on gas flow characteristics of coal seam and gas emission law of coal wall under mining disturbanceLi Chunren, Yuan Jiguang, Cao Mingliang, Wang ZhaoqianQuestion Discussion27-336Stress variation law of surrounding rock and its influence analysis of working face mining around irregular coal pillarsWu Zhigang, Qian Wanxue, Hou Ting, Zhang QiQuestion Discussion34-41,467Discussion on the treatment methods of roof management problems in coal mining faceMa ZhouQuestion Discussion42-468Study on evolution law of permeability of small coal pillars under multiple mining damage conditionsJin Jingjue, Zuo Cong, Meng FanluQuestion Discussion47-559Study on reasonable size of protective coal pillars in roadway of rock burst coal seamHe Qi, Zhou Yu, Zhong Taoping, Li ZhenleiExperimental Study56-6010Study on gangue filling material beside roadway in ultra-high water filling working faceLiang Xu, Xue Xiaoqiang, Gao LinshengExperimental Study61-64,6911Experimental study on influence of water content on secondary oxidation and spontaneous combustion characteristics of residual coal in goafZuo Qiuling, Chen Xinkun, Yang Pengfei, Li Jingshan, Li Minrui, Li Yake, Tian Yifan, Li HongchaoExperimental Study65-6912Research on performance optimization of carbon dioxide blasting device:comprehensive analysis of process parameters and fracturing device characteristicsLi Shiqi, Zhang YinqiuExperimental Study70-7413Stability analysis of coal seam floor and coal seam uphill under coal pillar recovery conditionsTian XiaoleiExperimental Study75-7914Risk assessment of water hazard in multi-layered aquifers of Cretaceous system and study on layered drainageSun Jianxi, Gong Fenggang, Chen Guodong, Han Gang, Feng Peichao, Cui Mengke, Qiao WeiCoal Safety80-8815Chemical analysis of main water filling sources and identification of sudden(gushing)water sources in Yaoqiao Coal MineGao Zhikuan, Sun Yanchen, Li Yonghua, Yuan Huiqing, Yi HaizheCoal Safety89-9616Study on distribution characteristics of"three zones"of spontaneous combustion in goaf of a kilometer deep well high gas working faceJia Weipeng, Xu Yongji, Ma YajunCoal Safety97-10117Application research on fast switching of power supply and compatibility of variable frequency speed regulation device for coal mine main ventilation fanZhang Zhifei, Wei ZongkangCoal Safety102-105,11318Gas emission law of multi-field coupling pressure relief in gangue filling mining siteGuo ShumingCoal Safety106-11319Research on automation transformation of electronic control system for coal mine auxiliary shaft liftingTian XugangCoal Safety114-116,12020Common electromechanical fault diagnosis and troubleshooting methods for coal mine driving equipmentShi Feng, Li Lin, Wang Hailong, Wang Yanyun, Ma YanxiaoCoal Safety117-120 