Y型通风条件下综放沿空留巷巷道稳定性控制

Stability Control of Gob-side Entry Retaining in Fully Mechanized Top-coal Caving with Y-type Ventilation

本文将东峰煤矿3G02工作面轨道巷沿空留巷出现的大变形破坏问题作为研究对象,分析了轨道顺槽变形破坏特征,得出巷内支护强度较低、原支护结构刚度与强度不耦合是导致出现大变形破坏的主要原因。结合该矿实际情况,设计了“巷内‘锚网索梁联合支护’+巷旁‘锚杆+矸石袋’支护”方式,从现场应用情况来看,较好的对轨道顺槽稳定性实现了控制。

In this paper,the large deformation and failure of gob-side retaining roadway in the 3G02 working face of Dongfeng Coal Mine is taken as the research object,and the deformation and failure characteristics of track crossheading are analyzed.It is concluded that the main causes of large deformation and failure are lower support strength in roadway as well as uncoupled stiffness and strength of original support structure.According to the actual situation of Dongfeng Coal Mine,the way of"bolt-mesh-cable-beam combined support in roadway"and"boltgangue bag support beside roadway"is designed.From the field application,the stability of track crossheading is well controlled.