Development and application in ultra-thick plate production of unidirectional solidification technology;

Underground pressure behavior rules were obtained by observation of working resistance of supports,stress of surrounding rock and movement of top coal in full-mechanized caving mining face in Anjialing 1st Mine,which provided foundation of safe and high-effect mining for full-mechanized caving mining face in shallow buried and extremely thick coal seam.

Research on strata behavior law of fully mechanized longwall caving mining face in extra thick seam in Datong Mine Area;

Study on observations on underground pressure of special thick seam at full seam gateway in high stress area;

Fu Gas thick coal seam,the short duration of spontaneous combustion technology Face rapid retracement;