1Optimum location for roadway in lower seam of contiguous coal seams with variable spacing in Meihuajing Coal MineLIU Xiaoming, LI Tiezheng, LEI Xuetao, HUANG Haipeng, LI Yang, REN Yuqi, WANG WendiDesign Technology1-62Design of inverted trapezoidal supporting scheme for soft rock roadway using high pretension long anchor cableHAN Jinbo, HUANG Xiaoping, WANG Zhanghui, LI Chao, ZHANG Jie, GAO ShoushiDesign Technology7-153Optimization of mining well location and high efficiency gas extraction in fully mechanized working face of slicing miningXU JiangtaoDesign Technology16-214Research and application of intelligent control technology for main transportation in coal mineZHANG Yaoming, LI BiaoDesign Technology22-275Layout and relocation optimization of double crushing station in inclined coal seam open-pit coal mineXU Quanyao, CAI Mingxiang, GAO Jinlong, CAO Bo, LIU Shichen, WEN YuDesign Technology28-336Foundation scheme of large-span cylindrical reticulated shell coal storage yardYAN ZhengkeDesign Technology34-387Rapid construction technology of large section and hard rock roadway blastingZHOU Qinghong, XIAO DiancaiConstruction Technology39-448Roadway surrounding rock control technology for stress-concentration area of boundary pillar in coal seams group staggered working faceLIU Run, YANG Ruigang, WANG PengfeiConstruction Technology45-509Research and application of pier column support technology for reused roadway with strong mining impactLI Bo, WANG Tao, LI MingConstruction Technology51-5710Roadway grouting reinforcement technology during fully mechanized mining face crossing fault in Taoyuan Coal MinePAN Weipeng, HUA Xinzhu, LIU Bin, LI Chen, YING Long, FENG GuohaiConstruction Technology58-6511Application of 3D elastic wave full-waveform inversion in Xiaobaodang Coal Mine explorationLIU Chao, LIU Peng, ZHANG Huifeng, Bai Kun, LI Zhiyong, PAN WenyongConstruction Technology66-7112Gas extraction technology with long borehole segmented hydraulic fracturing in medium-hard coal seam of Binchang mining areaCHEN DongdongProduction Technology72-7713Optimization of drilling hole layout mode for high gas thick coal seamYU Liya, ZHANG ZongliangProduction Technology78-8314Application of combined ground-underground microseismic monitoring technology in near-horizontal coal seamWEI Huanwei, CHEN Yang, HAN Fei, ZHANG KunProduction Technology84-8815Energy accumulation and dispersion of double low level inferior key strataBA Yulong, CAO Minyuan, LIU Ming, XU YuanshanProduction Technology89-9316Joint decision of maintenance and spare parts inventory for boom-type roadheader pick systemQIN Yankai, ZHANG Xiaohong, ZENG Jianchao, LI Xiangyu, LIANG HaoProduction Technology94-10117Noise processing method of acoustic emission monitoring signal in coal roadway drivingHU JieResearch and Discussion110-11418Analysis and evaluation of safety influencing factors for excavation of main roadway in thick coal seam re-mining areaLI DaResearch and Discussion115-11919Characteristics of surface movement and deformation of super-long working face in eolian sand region in northern ShaanxiFENG Zewei, FU Yaokun, HU Zhenqi, BAI Mingbo, SHI Guomou, YU Qiuge, LI Pengyu, WANG JianwenResearch and Discussion120-12520Mechanical characteristic analysis and parameter optimization design of anchoring unit in drilling rigGONG Yongchun, SUN Xiaohu, LI Weidong, WANG Yilong, MA Xiaoqiang, XIE Miao, ZHANG Hongyu, LIU Zhixiang, LI YuqiResearch and Discussion126-132 