1Virial theorem and its symmetryWANG Huaiyu1-102Simulation and analysis of dust transport law in open pit mine under different wind speed and directionTIAN Dongmei, LIU Haozhen, JIA Changchang, MA Xinyue11-183Study on roadway layout and surrounding rock deformation mechanism of layered simultaneous mining in upper and lower coal seamsLV Renjie, ZHANG Kexue, KANG Lei, ZHU Junao, WANG Xiaoling, YANG Haijiang19-244Space-temporal evolution and hydrochemistry analysis of Qingfeng river in Tin mineLIU Min, HAO Chunming, JIA Yanli, ZHANG Wei25-315Research on low oxygen prevention and control technology of return air corner in shallow coal seamZHU Yinsheng, WANG Yuhuai, GAO Song, LI Gengchuan, NIU Ruihua, YANG Hao32-356Experimental study on symbolic gas and the shortest spontaneous combustion period in coal seamWEI Chao, SHAN Wenxuan, CHEN Jianglong, SUN Jihong36-40,667Design and practice of water circulation in directional drillWANG Jiachuan, TIAN Xing, XIE Yunfei, BAI Fugan41-458Comparative analysis of neural network and weak learning mechanism algorithm in single-phase grounding fault judgmentSU Yurong, GU Tao46-539Research and simulation of navigation system of mobile robot based on ROSWANG Di, LI Guan, YU Teng, LI Renshi54-6010Application of social media data mining in urban emergency managementLI Yiman, CHENG Genyin, WANG Yongjian61-6611Study on emergency evacuation of subway platform fireZHANG Runqi67-7312Analysis of the influence of deep foundation pit excavation on adjacent subway safety based on Midas/GTSLIU Yang, ZHANG Lihua74-7913Research on building fire early warning algorithm based on fuzzy Bayesian networkYAN Juan80-8514Fuzzy evaluation of metro shield construction safety management based on combination weighting of game theoryJIANG Tingting, YAO Chuanqin, TONG Zhangjun86-9215Efficiency evaluation of coal mine safety management based on data envelopment analysisLI Ziyun, YANG Li93-10016Visual analysis of Chinese emergency equipment literature based on CiteSpaceHU Wei, SI Junhong, WANG Yiqiao, LI Tan101-10817Construction of evaluation index system of public sector social risk prevention abilityLIU Wei, LING Huihao109-11818Emergency management education and training system based on the supply-demand matching perspectiveLI Xuebing119-124 