5Model and its application on the evaluation of degree of difficulty of top coal caving in steep seam134-138
12The experiment theory and the experiment study on eliminating gas accumulation in upper corner by pulse jet168-172
13Study on numerical simulation of gas eission regularity and boundary condition of the goaf in coal caving of the fully-mechanized173-178
19Selection of coal preparation flowsheet by multi-stage comprehensive fuzzy evaluation method201-205