1Development and utilization planning of closed mines in western BeijingLI Xuebin, ZHOU Yuying, ZHANG Jun, ZHU Renjing, CUI YongguoDesign Technology1-72Design and application of continuous mining and paste filling process systemWU Jianhua, LI Yuzeng, WANG ZhuangDesign Technology8-133Research and application of key technology for intelligent high-cutting fully mechanized working face in thick coal seamSUN Yanbin, CHEN Baodong, WU Tao, WANG BaixiaoDesign Technology14-204Design of a new-type intrinsically safe power supply protection circuit for miningDENG Jianan, GUO Qingrui, YU Bo, LI XiaobinDesign Technology21-255Research on integrated management and control platform for coal mine groupWANG Jie, LI Xiaohua, WAN Yifan, XIANG Jianping, WANG JiannanDesign Technology26-316Ecological status evaluation of coal mine area in Shanxi ProvinceHUO Haiying, REN Shuyang, PENG Keping, HOU WeiDesign Technology32-407Roof structural analysis and surrounding rock control technology in gob-side entry retaining by roadside fillingJIA Jing, LU Zhimin, REN Wei, YANG HongzengConstruction Technology41-488Mechanism of non-uniform failure surrounding rock along the strike in gob-side entry retaining of Daliuta 52606 working faceCHI Guoming, ZHOU Haifeng, LI Gang, SHI Zhanshan, WANG WeiConstruction Technology49-569Comprehensive exploration management and development characteristics of decline-death type collapse columnAN Fengcun, DU Haipeng, FENG Hui, ZHANG Haozhe, WU Wenqiang, CHAI Jirui, LIU YuminConstruction Technology57-6210Intelligent evaluation method of directional drilling grouting effect in limestone aquiferLI Wenxin, JIA Dongxiu, CHEN Jiangang, FU Ziqun, CHEN Juntao, GUO Hongyun, LIU LeiConstruction Technology63-6911Plugging technology optimization of coalbed methane infill well in mature blockLI Shutao, ZHU Hanyou, YIN Zhongshan, QIAN Cheng, ZHANG Xiujun, ZHOU Ruiqi, MOU Bixin, HUANG Fushan, DING FeifeiConstruction Technology70-7712Development characteristics of water flowing fracture and stability of aquiclude in longwall top-coal caving of shallow coal seamZHANG Jinjin, DU Hang, ZHANG Jiachen, ZI LongProduction Technology78-8513Classification and comprehensive management technology of coal spontaneous combustion hazardous areas in the remining faceWANG Chongjing, YANG Feng, LI Keke, LIU ShuoProduction Technology86-9214Mine pressure behavior in main haulage roadway of fully mechanized working face in Buertai Coal MineFAN Donglin, CHEN Sushe, WANG Qingxiong, WANG Wei, CAO Jun, CUI Lijun, WANG YanlongProduction Technology93-9715Optimization of gas extraction parameters in roof directional long drilling of Licun Coal MineSHEN Haisheng, ZOU Hu, LIU Lei, ZHAO Chunzhou, WANG Yanmin, CAO Liangwei, TIAN Jinxiu, TIAN LongProduction Technology98-10416Optimization of cross-section shape of gently inclined semi-coal rock roadway with high geostressWANG Zhiqiang, YIN Anran, LI Jingkai, CHAI Huhu, WANG YanfeiResearch and Discussion105-11217Development law of fractures in overlying strata of lower seam of contiguous seams in upward miningZHANG Zhiyong, LIU Yuanyuan, LI YanfengResearch and Discussion113-11818Roof cutting height determination and surrounding rock control technology of gob-side entry retaining based on mechanical modellingXIN Yajun, WU Chunhao, YANG Junpeng, TIAN Menghan, ZHU RenrenResearch and Discussion119-12619Optimized design of detachable mine anchorage based on sub-field analysisLUO Wen, MAO Aiju, YANG Juncai, FAN Runxi, PENG PengResearch and Discussion127-13320Influence of ultra-thick hard stratum migration on advance abutment pressure of working faceXU Bin, ZHANG Yan, XU WeizhengResearch and Discussion134-140 