关键词: 沿空留巷, 等效荷载, 支承压力, 相对垂直位移

Abstract: On basis of analysis of abutment pressure on coal floor of gob-side roadway and concept of equivalent load, the simplified mechanical model of roadway floor is established. Based on this new mechanical model, the calculation formulas of relative vertical displacement is deduced by the displacement solution in elasticity for semi-infinite body under strip load in the planar strain problem. The vertical displacement change law of floor is analyzed in Xin Zhuangzi mine, which proves that the torsion of coal floor is one of important reasons for the destruction of the roadway, and the corresponding reinforced measures are approached. The vertical displacement change law is consistent with the real monitoring data.

Key words: gob-side roadway, equivalent load, abutment pressure, relative vertical displacement