Cai Mei-feng

Seam dip angle based mining subsidence model and its application

The novel mining subsidence prediction model is developed with the dip angle of a bedded ore deposit as a variable. It is applicable for coal seams with a dip angle ranging from 0 to 90°. Application of the model for seams with varying dip angles well demonstrates its good adaptability.

Determination of Similarity of Explosives for a Model Experiment

By applying the matrix analysis method, the main similarity criteria of an explosive and a material simulating soil properties are deduced. Determination of similar explosives significantly depends on the choice of soil simulator. It is more reasonable to determine first the similar explosive and then the similar material rather than vice versa. Feasibility of the method was verified by comparing the results of model experiments for frozen soils and cement mortar.