1Study on gas seepage-diffusion law and numerical simulation in goafCui Chongbin, Yuan Jiguang, Qu Hu, Chen Qiaojun, Wang Zhaoqian, Cao MingliangQuestion Discussion1-82Research on efficient mining technology of fully-mechanized mining face in Huayuan Coal IndustryLi Junxing, Li Jianguang, Liu HaoranQuestion Discussion9-143Research and practice on environmental protection and energy conservation in coal mining under low carbon backgroundChen LeiQuestion Discussion15-19,244Research on environmental benefit evaluation and development trend of coal mine dust control technologyJia PenghuiQuestion Discussion20-245Design and research on a new cooling system with joint arrangement of ground and undergroundWang Zhenpeng, Li Chong, Liu Peng, Wang MengQuestion Discussion25-28,346Research and application of reinforcement learning driven density optimization control in dense-medium sortingSong Wanjun, Bai LongQuestion Discussion29-347Research and application of"110 Method"retaining roadway parameters in thick coal seam of Xinyan Coal MineMa Chi, He Ling, Gao JingweiQuestion Discussion35-408Analysis of hydrogeological characteristics and water enrichment rules of floor 4-limestone in west wing mining area of Zhangshuanglou Coal MineLiang GuodongQuestion Discussion41-539Research and application of high efficiency wetting agent for coal seam water injection in Xindeng Mining fully-mechanized mining faceLiu ZhiqiangQuestion Discussion54-5810Comparative research on advantages and disadvantages of downhole penetration detection and acquisition methodsRen ChaoQuestion Discussion59-6111Research on floor heave mechanism and control technology in soft rock roadwayDing ChenExperimental Study62-6812Research on supporting technology for narrow coal pillar gob-side entry diving in isolated working facesXin Jian, Cao FeiyangExperimental Study69-79,8513Research on inclined impact characteristics of circular nozzle water jetZhang YongbinExperimental Study80-8514Observation and numerical simulation study on development height of"two zones"on the roof of coal seam in Ke'erjian Coal MineZhang Wu, Feng Jianli, Wu Qing, Qian Hongtao, Ding Huanhuan, Li XinExperimental Study86-91,9615Simulation study on identification of coal gangue under multi-factor conditionsRan Guofeng, Lu Rui, Yu JituExperimental Study92-9616Optimization study on treatment technology of accumulated water at bottom of inclined basin in Zhanihe Open-pit Coal MineLiang Chengjiang, Li Ying, Liu Yuxi, Wan Fei, Wang Jiming, Wang Jiao, Han Dongjian, Hu JiannanCoal Safety97-10517Research on influence and control effect of Jinsha Hydropower Station water storage on Taiping Coal MineLiu Di, Wei XinCoal Safety106-11118Research and application of"three soft"outburst coal seam gas control technology in Liangbei Coal MineGe Lingxun, Zhang Tao, Deng ShishiCoal Safety112-116,12019Optimization control of air quantity supply during the switching process of mine ventilatorsZhang ShengliangCoal Safety117-12020Experimental research on gas leakage alarm device and servo constant pressure sealing system for coal seam extraction boreholesDu Jianbin, Dong Zexing, Wang YangCoal Safety121-125,129 