切顶留巷下挡矸支护研究

Research on Blocking Gangue Supporting in Roof-cutting Roadway

针对切顶留巷下采空区侧帮碎落矸石压力导致采空侧帮变形量增大、矸石涌入巷道等问题,提出了具有一定抗弯强度的曲线挡矸柱对采空侧帮挡矸支护方法。基于力学分析,研究了采空侧巷旁受力特点,建立了采空侧支撑结构简化力学模型,推导了巷旁顶、底板压力和矸石侧压的计算方法,并对垂直和曲线挡矸柱进行了结构分析。

Aiming at the cut the top left lane under the goal side side shattered gangue pressure leads to gob gob side roadway deformation increases, the influx of gangue and other issues, put forward by certain bending strength curve of gob gangue blocking column for block rock support. Based on the mechanics, the characteristics of the mining side of the roadway are studied, and the simplified mechanics model of the empty side support structure is established. The calculation method of the pressure of the floor and the lateral pressure of the side wall is deduced, column for structural analysis.