浅埋大断面辅助运输巷掘进及支护设计

Excavation and support design of shallow large section auxiliary haulage roadway

本文以增子坊煤矿8303大断面运输巷为研究对象,探讨了影响巷道掘进的影响因素,根据实际地质情况和矿井生产,提出了对8303巷道的掘进施工方案和工艺流程。同时,针对其围岩特征,采用了“锚网+锚索+W钢带+喷砼”的联合支护方式。实践证明,有效的掘进工艺和合理的支护方式有助于巷道的安全快速掘进,以便煤矿的正常安全生产。

In this paper,the 8303 large section haulage lane of Zengzifang coal mine is taken as the research object,the influencing factors of roadway driving are discussed,according to the actual geological conditions and mine production,the construction scheme and technological process of 8303 tunnel driving are put forward.At the same time,according to the characteristics of surrounding rock,the combined support mode of“anchor net+anchor cable+W steel belt+shotcrete”is adopted.It has been proved that the effective excavation technology and reasonable support method are helpful to the safe and rapid excavation of the tunnel,so as to ensure the normal and safe production of coal mines.