1Study on sandstone roof caving character in gob-side entry retaining by roof cut and pressure reliefHE Man-chao, GUO Peng-fei, WANG Jiong1-72Discussion on critical supporting strength of underground engineeringWANG Ming-yuan, LI Shu-cai, WANG Qi, WANG Lei, WANG Xin-wen, ZHANG Hao-jie, XU Ying-dong8-123Division and evaluation of floor water inrush hazard in 13 mining area of lower coal group in Nantun, MineWANG Bing-du13-15,274Study on molecular simulation of Illite on hydration mechanism and water absorption behaviorWANG Guan, LI Guichen, SUN Yuan-tian, GAO Kai, DU Lele16-225Influence of bolt reinforcement method on slope stabilityKONG Wei-feng, WANG Yu-kai, SUN Yu-gui23-276Construction of management system for water control and prevention of coal mine geologyWANG Jian-ming28-297Deformation prediction and risk assessment of coal mining under railwayKUAI Yang, LIU Hui, ZHENG Liu-gen, ZHU Xiao-jun, ZHOU Yi-zhao30-33,368Analysis of angle error finding in underground traverse measurement using analytic methodLIU Da-wen34-369To explore the use of two visibility control point measurement line methodXUE Si-yuan37-3810Analysis of comprehensive exploration drainage technology in construction of mining area tunnelCHENG Deng-qiang39-4111Study on simulation of thermal environment in deep coal miningZHOU Mengying, FENG Lipin, MA Chi41-4412Study on water conductivity characteristics of 11-2 coal roof sandstone water in Zhujidong MineCUI Kun-sheng, WU Rong-xing45-47,5413Application study on application system of mining technique without pillar in roof cutting and pressure relief of gob side entry formingJIN Yin-cai, YU Xue-ping, HUANG Zheng-gu48-5114Research on drilling directional drilling technologyLIU Ying-wu52-5415Study on influence of mining on landslide and its controlXU Ming55-5716Study on mining technology of collapse column around mining faceWANG Chao58-6017Study on gas drainage technology of coal mineLI Xu61-62,7018Study on control technology of surrounding rock of roadways in No.2 coal seamWANG Bao63-6519Research on application technology of flexible formwork concrete in gob-side entry retainingAN Jian-guo66-7020Numerical analysis of flow field and dust in quick driving face of fully-mechanized driving faceWANG Kai-de, NING Hong-jin, LIU Mao-xi71-74 