Study on floor heave mechanical principle of underground roadways with the action of abutment pressure

摘要

The generation and development course of the floor heave of the roadways with dynamic pressure is studied in this paper. It is presented that the mechanical characteristic of the floor strata is one of the factors leading to heave. However, the abutment pressure is the main factor. The mechanical principle of the floor strata and coal sides' deformation and failure leading to heave of the roadway is discussed. The conclusion shows that the floor heave of roadways with dynamic pressure is the result of the synthetic effect of these factors.