1Experimental Study on Relationship Between Firmness Coefficient and Porosity of CoalZHANG Ruilin, WANG HaileTest·Research1-32Distribution Laws of Crossing Boreholes Plastic Zone in Coal Seam Gas DrainageSUN Yingfeng, SUN Xiaoyuan, CAO Jialin, SHAO Shengyang, RONG TaoTest·Research4-63Effect of DC Pulse Electric Field on Methane Adsorption Characteristics of CoalLIU Chao, CHENG Yongqiang, HE XiaogangTest·Research7-9,134Experimental Study on Triaxial Compression of Coal Containing Methane Under Different Confining PressureDU Yuqin, YUAN Mei, MENG Qinghao, XU ShiqingTest·Research10-135Research on Coal Sudden Extrusion MechanismQI Liming, GE Xubin, ZHAO RongTest·Research14-16,196Experimental Study on Zhaozhuang Coal Slime Separation by Flotation ColumnZHANG Zhao, ZHANG Hongge, ZHANG WeiTest·Research17-197Tectonic Characteristics of Jinhuangzhuang Coal Mine and Its Control on Mine Water and GasSHI Yanru, XU Jinpeng, LIU Jiegang, LI YanhuiTest·Research20-23,278Underground Recharge Runoff Discharge Characteristics and Aquifuge Characteristics at Ordovician Limestone Top of Chengzhuang Mine FieldJIAO YangTest·Research24-279Interaction Between Soft Rock and Water in Deep Lower Coal Seam FloorCONG Qianqian, ZHU Shuyun, MENG Hui, WANG Chengtian, XI XiujunTest·Research28-3010Bearing Mechanism of Surrounding Rock in Loose and Broken Coal Seam and Its ApplicationSHANGGUAN Shumin, ZHANG Qingshan, GAO Mingshi, YAN ZhenchaoTest·Research31-3411Roof Movement Law and Support Supporting Strength Calculation in Shallow Depth Close Distance Room Mining GobGUO Weibin, LIU Changyou, KANG Qingtao, ZHAO Zhanquan, DO Anhson, CHANG LongTest·Research35-3812Relationship Between Deep Tunnel's Asymmetric Deformation and Surrounding Rock's Strength and Spatial StructureHUANG Wanpeng, WANG Longjiao, ZHANG Yangyang, FENG Fan, HAN ChunTest·Research39-4213Working Face Unsealing Technology of High Gas and Fault Repeated Spontaneous Combustion Coal SeamYAO Haifei, LI Zhiwei, CHEN Guohua, FAN Shaowu, LI Min, ZHANG QunTechnology·Innovation43-4614Anti-fire Bomb Control Technology in Coal Storage Pile (Gangue Hill) Spontaneous CombustionJIN Yongfei, LI Haitao, LI Bei, MENG Qinghua, GAO ShuangshuangTechnology·Innovation47-5015Fire Detection Technology of Gob Hidden Source Based on Forward and Inverse Two-way SimulationDUAN XikaiTechnology·Innovation51-5416Surrounding Rock Controlling Technology for Soft Rock Roadway in Floor Influenced by Short Distance Overhead MiningSONG Zhaoqian, WANG Zhenwei, CHE MingTechnology·Innovation55-57,6117Water Prevention and Control Technology of Ascending Mining Based on Numerical SimulationZHAO Baofeng, MA LianjingTechnology·Innovation58-6118Stability Technology for Fully Mechanized Mining Equipments in Steeply Inclined Working Face Under Condition of Broken FloorWANG Wei, ZHANG Yangyang, ZHANG Lei, ZHANG Bingbing, HUANG Wanpeng, GAO LinTechnology·Innovation62-6419Grouting Reinforcement for Broken Roof in Return Air Roadway With Large Inclination Mining FaceZHANG ChunleiTechnology·Innovation65-67,7020Grouting Reinforcement Technology for Crushed Surrounding Rock RoadwayXIONG Zuqiang, GONG Yanhua, LIU ChengweiTechnology·Innovation68-70 