Study on Abnormal Mine Strata Pressure Behavior During Deep Mining

In order to study the abnormal phenomenon of the mine strata pressure behavior occurred from the mining process of No.6304 coal mining face in Jisan Mine, based on the observation of the mine pressures, with the theoretical analysis and the study method, the mine pressure abnormal behavior features of the coal mi ning face was understood.The paper pointed out that the mine abnormal behavior areas of the coal mining face, the main roof caving step distance, seam thickness, gat eway retained along goaf for the auxiliary transportation gateway, fault, watery roof and mining depth would be the main factors of the mine pressure abnormal behavior s occurred in the coal mining face.The fast advancing speed of the coal mining face and the initial support force of the powered support not less than 3 389 kN could be effective to ensure the safety production in the mine pressure abnormal area of deep mine.