8Technology of Water Control and Prevention in Process of Construction of Outside Sump in Liudong Colliery21-24
13Application of Devices of Damping,Holding Tank and Vertical Shaft Hoisting in Liudong Colliery43-44
16Gas Control Practice in Fully Mechanized Mining Face by Using Lower Roadway for Transporting Support50-51
17Suggestions and Countermeasures of Self-Operation Railway Assets Management in Xuzhou Mining Group52-53