1Study on Numerical Simulation on Influences of Dip Angle of Cross Boreholes on Gas DrainageJI Li-xiang, ZHU Chuan-jie, REN Jie1-52Study On Rule of Strata Behaviors on 31202 Fully-mechanized Caving Face in Cuncaota No. 2 Coal MineYANG Zhen, ZHANG Shi-ming5-103Study on Optimization of Roof Control Technology in Coal Mine Working FaceZHANG Jun10-124Study on Height of Water-conducting Fracture Zone in 28806 Fully-mechanized Face of Dongqu Coal MineTIAN Chao13-155Numerical Simulation Study on Surrounding Rock Control Technology of Thick Mudstone Direct Roof RoadwayGUO Hai-jiang16-18,266Calculation and Analysis of Parameters of Large Dual-Stage Grate-Free Bottom Hammer Crusher Used in MineLIAN Fang, ZHANG Xin-feng, SUN Xiao-guang19-217Study on Gas Emission Prediction and Gas Emission Composition of Fully-mechanized Caving Face in Deep MineSHEN Wei-peng21-238Study on Comprehensive Water Control Technology on Fully-mechanized Working FaceGAO Xiao-hua24-269Theoretical Analysis and Numerical Simulation Study of Reasonable Size of Section Coal PillarLUO Yu-en27-29,4610Blowout Analysis of 2011 ZX-CC-01 Well in Dongwupan area of Sihe MineLI Ye-lin30-3211Study on Tests of Wetting Performance of Coal Mine Dust and Its Influencing FactorsYE Chuan, XU Ning, ZHOU Jian-wei, LING Wei33-3612Error Analysis of Dip Angle Location of Water Exploration and Drainage Boreholes in Coal MineWANG Wei-nan37-3913Optimization of Limestone Roof Supporting Parameters in Dangtanggou Coal MineLIU Kun, YANG Chong-shan40-4314Rock Burst Simulation and Regularity Analysis of Deep Coal Winning FaceFAN Yin-hui44-4615Simulation Study on Similar Material for Development of Three Zones on 7602 Working Face in Yuwu Coal IndustryGONG Yue-bin, HUA Ming-guo, HUANG Xiao-sheng47-5116On the Optimization of Narrow and Small Pillar Supporting Technology for Coal Mines with High Gas Content and Soft Coal SeamsZHANG Zhong-ru, GUO Xin-shi, YUAN Bo, LI Guo-sheng52-54,8417Research on Way to Improve Recovery Rate of Resources in Fully-mechanized Caving Face and Its ApplicationYANG Kun55-5818Study on Measuring Effective Gas Drainage Radius of Ⅶ20 Coal Seam in Pingdingshan No.2 Coal Mine of Pingdingshan Tian'an Coal Industry Co., Ltd.XU Yan-wei59-6219Construction Technology of W3225 Working Face Crossing DF71 Reverse Fault in Qianyingzi Coal MineZHANG Lei63-6620Application of Rock Expansion and Fracturing Technology in Fully-mechanized Working Face Passing Through StructuresSU Li-wen67-69 