1Key technologies for intelligent transformation in complex coal seamsYANG Lin, LI Zhengjun, ZHANG JiangyunDesign Technology1-72Design of second level extension and production system optimization for Cuncaota Coal MineCU YongbinDesign Technology8-153Layout of mining roadways and surrounding rock control technology in the lower coal seam of contiguous coal seamsSUN Jianxin, ZHAO ZhengjunDesign Technology16-234Hazard risk analysis of natural gas wells in coal-gas overlapping area and the disposal technologyXIE Songyan, ZHAO Qiang, WEI Feifei, LI Chen, DONG Junliang, MA JunxiaDesign Technology24-305Prediction method for underflow concentration of coal slurry thickener based on settling rate modelRONG DongDesign Technology31-366Application effect of improved AAO process in coal mine domestic sewage treatmentLI Xuanlong, LIU Gangchao, CHENG JiningDesign Technology37-417Mechanism of gob-side roadway large deformation with gradient coal pillar in ascending mining and the sectional collaborative support technologyFANG Wanwei, HAO Qingwang, DONG Jinfa, CHEN Jiangang, LIU Tongshen, ZHANG Yong, LIU Qilu, ZHANG JixiangConstruction Technology42-488Research on the mechanism and process optimization of static fracture cutting in thick loose layer and thin bedrock minesGUO Jun, FAN Gangwei, WANG Mingtao, ZHANG Wenhui, ZHANG Dongsheng, REN Chuangnan, ZHANG Shizhong, FAN ZhangleiConstruction Technology49-569Dynamic directional drilling test for advance pressure relief in strong outburst soft coal seamsGUAN QiangshengConstruction Technology57-6310Effect examination of advance regional management of water hazards in ultra-thick loose layers of coal mine roofsYAN Xin, DING Xiang, PU Zhiguo, LI Zhe, FENG Jie, JI ZhuochenConstruction Technology64-7111Hydrogeological risk analysis of underground coal gasificationJIA Hongwei, WANG Danhua, FU JianzhuoConstruction Technology72-7812Coupledg mine pressure weakenin mechanism of roof cutting roadway retaining in co-mining of contiguous coal seamsZHU Konghao, YANG Yongkang, XU Xuecong, LI Shuai, HU GuoyouProduction Technology79-8713Fractal evolution of overburden fissures and mine pressure law in deep buried large mining length working faceLI HongbiaoProduction Technology88-9614Leakage detection of heating pipeline based on CUSUM and BP neural networkZHANG Weiguang, SUN Chuanzhu, FAN Dongqi, PENG Leixiang, XU GuangcaiProduction Technology97-10415Water level detection of underground mine water sump based on multi-sensor fusion and DeepLabv3+algorithmWANG Deji, WANG Yanfei, YANG Kaile, MA Ping, ZHAO Junda, LIU TaoProduction Technology105-11116Stability analysis of backfill body-roof synergistic bearing considering the age intensityZHAO Bingchao, WANG Ruifeng, WANG Jingbin, CHEN Haonan, YANG Zhonghao, TUO YongshengResearch and Discussion112-12117TBM boreability prediction and rock mass classification method based on fused intelligent optimization algorithmsSHENG Yuanwei, LIU Hongli, ZHU Hao, ZHANG ChaofanResearch and Discussion122-12918Research on the main controlling factors for the initiation of water and sand inrush in weakly cemented roofDU MingzeResearch and Discussion130-13719Surface subsidence law caused by fully mechanized top-coal caving in shallow-buried extra-thick coal seamGUO Wenyan, LI Jie, MENG Haixiang, LING ChunweiResearch and Discussion138-14520Mechanical properties and energy evolution law of variably-sized backfill bodiesZHAO Mengye, ZHU Lei, LIU Chengyong, GU Wenzhe, LIU Zhicheng, HE Zhiwei, DING Ziwei, QIU Huafu, LI YuhangResearch and Discussion146-152 