A study on mechanical principle of floor heave of roadway driving along next goaf in coal face with fully mechanized top-coal caving

摘要

This paper examines the mechanical principle of the roadway driving along next goaf in coal face with fully mechanized top-coal caving. On the basis of analyzing mechanical situation of the roadway, a mechanical model of roadway floor is established. Applying the elastic theory, the relative vertical displacement of floor strata of the roadway, the narrow pillar and the high abutment zone are calculated. The mechanical principle of floor heave of the roadway is revealed.