10Gas Drainage Method and Its Effectiveness in Luling Mine in Huaibei Coal Mining AreaNIE Zheng24-25,27
11Practice and Effectiveness of Extraction of No.5608-4 Upper Protective Layer in Xinzhuangzi MineXIA Shi-bai26-27
12Complex Control of Gas at Upper Corner Angle of Medium-thick Seam with Fully Mechanized Caving Mining28-29,32