1Application of Surface Pre-grouting Technology to Mine Shaft Construction of Yangliu MineHu Huanming2-42Construction of Temporary Shaft Collar for Liangbaosi Mine Ventilation Shaft Through Running SandsGao Mufu5,43Bolt and Grouting Combined Support Technology Applied to Repair of Mine Roadway Crossing PointZhu Zhanhu6-74Cause Analysis and Repair Measures for Deformation Failure in Air Return Way of No.21 Mining Block in Liangbei MineRan Songhe, Qi Mingsheng, Wang Jianshu8-105Cement and Sodium Silicate Two Fluid Grouting Technology Applied to Control and Repair Falling Section of Mine RoadwayLiu Yuxiang, Yu Haiying, Liu Huipeng11-136Application of New Structure Reinforced Technology to Reinforce Miner's Dining RoomChen Jingli, Li Ze'nong14-167Prevention and Control for Water Inrush from K3 Sandstone in Mine Main Shaft of Wolonghu MineCao Lizhou17-18,168Technology of Pre-grouting at Working Face of Mine Main Shaft in Zhengjiazhuang MineXu Jin'gen, Lu Yun, Wang Junyi19-20,79Preliminary Experiences on Gas Control in Mine West Wing Roadway of Sihe MineWang Sufang21-22,2910Repair and Reinforcement of -850m General Air Return Way in Qujiang MineXue Kuicai, Liu Guangming, Meng Bing23-2411Performance and Fast Setting Mechanism of Non Alkali Liquid Cement Fast Setting AgentPan Zhihua, Lu Wen, Cheng Jiankun25-2912Hydrogeological Features of Base Rock in Huaibei Coal Field and Surface Pre-grouting Water Sealing Technology for Mine Shaft SinkingChen Yuankun30-3213Discussion on Shaft Sinking Method for 800m Thick Alluvium of Wanfu Mine ShaftChen Changzhen33-3514Optimized Arrangement and Rebuilding of Mechanical and Electrical Equipment During Transfer Period from First Phase to Second of Yangcheng MineZhen Yangqing, Ma Jinping36-37,3215Raise Boring Construction Technology for Vertical Shaft of Langyashan Water Pumping Energy Storage Power StationXu Guanglong, Liu Zhiqiang38-39,2416Application of Horizontal Ground Freezing to Entry Construction for Soil Pressures Balanced ShieldWang Lingmin, Yang Xiesheng40-41 