1Study on Damping Effect of CO2 on Gas ExplosionLU Weidong, JIA Baoshan, LI Shouguo, YIN BinTest·Research1-3,72Experiment on Effect of Porosity and Dynamic Loading on Permeability of Tectonic Coal Under Negative Pressure DrainageYANG XiaopengTest·Research4-73Research on Negative Pressure Distribution for Bedding Gas Extraction Borehole Under Creep ConditionBAI Yapeng, ZUO Weiqin, LIU MingjuTest·Research8-114Experimental Study on Gas Migration Laws of Coal and Rock FracturesSONG Shouyi, ZHANG Yinghua, YANG Fei, HUANG Zhi'an, GAO Yukun, WANG HuiTest·Research12-155Study on Characteristics of Transient Electromagnetic Signal for Coal Failure by Hammer ImpactXIE Beijing, LYU Pingyang, MA Hongxing, WANG ChuanTest·Research16-196Experiment on Distribution of Particle Size and Velocity in Spray Field Under Disturbance of AirflowQIU Han, ZHU Liang, FAN TaoTest·Research20-237Experimental Study on Influence of Particle Size on Mechanical Properties and Permeability of Briquette Coal Containing GasYUAN Mei, XU Jiang, LI Bobo, WANG Zhen, DU Yuqin, XU ShiqingTest·Research24-278Degradation Capability Experiment of Low Concentration Methane by Microorganism in Air FlowCUI Xuefeng, ZHANG RuilinTest·Research28-319Fluid-solid Coupling Experiment Research on Water Flowing Fracture Development Laws in Overburden Rocks of Shallow Buried Short-distance Coal SeamsJIN Zhiyuan, ZHAO Xiaoying, MA Liqiang, XU MengtangTest·Research32-34,3810Study on Gas Emission Law from Residual Coal in Goaf of Fully Mechanized Caving Face Under Single Coal SeamWANG Zhiliang, CHEN XuexiTest·Research35-3811Simulation Study on Seepage Failure of Sand Based on Fluid-solid Coupling TheoryNI Hongyang, PU Hai, LI YunTest·Research39-4112Evaluation Method of Safety Monitoring for Freezing Shaft LiningWANG Lei, WANG Jianping, HONG BoqianTest·Research42-4513Study on Gob-side Entry Retaining of Concrete Filling in Thin Coal Seam and Thick Limestone RoofZHANG JiuyuTest·Research46-4914Test Study on Fly Ash Concrete Mechanical PropertiesYAO Wenjie, PANG Jianyong, YAO WeijingTest·Research50-5215Cutting Seam Design and Study of Gob-side Entry Retaining by Roof Cutting and Pressure ReliefTANG Jianquan, SONG Wenjun, SONG Libing, GUO ZhibiaoTest·Research53-55,5916Research on Structure Transformation Characteristics for Immediate Roof Key Strata with Large Mining HeightCAI ZhijiongTest·Research56-5917Study on Floor Stress Distribution Under Interval Coal Pillar With Flat LandformZHANG Futao, WEI Luhai, GUO ZhiweiTest·Research60-6318Stability Controlling Technology of Supports in Large Dip Angle FaceLI Xiaomeng, CHENG Zhanbo, ZHAO QingboTechnology·Innovation64-66,7019Gas Extraction Technique of Fully Mechanized Caving Face in High Gas Inclined SeamLIU Dianfu, ZHAO Pengxiang, ZHANG Xuetao, AN Xuedong, YANG Junsheng, SUN Hongxing, YAO XiaoboTechnology·Innovation67-7020Permeability Increasing Technology of Drilling and Expanding Integration for Outburst Seam Through Beds HoleWANG Zhijian, GUI HongweiTechnology·Innovation71-74 