4Mining and Exploration of Roof-coal Caving Faces in the "Three-softs"and Unstable Thick Coal-bed with Great Dip Angle23-25
8Superficial View on the Sustainable Development Strategy of Coal Mining Areas in the Light of the Total Planning of Yushen Coal Mine Area32-34
11Test and Study of Determination of the Relation between Coal Water Content Rate and Dust-laying RateZhang Yinghua44-46