3The Science and Technology Management Work Made by China Coal Research Institute Tangshan Branch11-15
6Study of the Approach for Extending the Service Life of Large Size Heavy-medium CycloneWANG Zhao-shen23-26
14Present Status of the Hydraulic Coal Mining Technology in China and Major Problems Calling for Tackling in the Future54-56
18Study on the Technique for Guarding against the Deformation of A New Air Shaft Protected with A Small-sized Pillar66-69
19Study of the Mining-induced Dynamic Expansion of Fractured Rock Mass through Physical SimulationZHNAG Junying69-72