Numerical analysis of breaking depth of coal floor caused by mining pressure;

Forecast of water inrush from coal floor based on least square support vector machine;

Combined ANN forecast of water-inrush from coal floor;

Application of similar material simulation in research of coal seam floor failure regularity;

Research of No.9 coal seam floor's fracture regularityin Xiandewang Coal Mine;

Study of hydrochemical characteristics in Karst water of coal seam floor in the Mining District of North Anhui;

Environment isotope determination mode for Karst water under seam floor of Wanbei Mining Area;

Numerical simulation of water inrush law in coal seam floor with cracks and its application to engineering practice;

Research on mining failure features of seam floor;

In situ measurement of floor strata displacements in slice mining;

Study on fractal feature in the process of deformation failure for floor strata;

It is pointed out in theory that the relative displacement of two walls of the fault is maximum, when the fault surface,which inclines to the workings and is parallel to the edge of the workings, is in coincidence with the maximum swell line in the floor strata.