大断面软岩巷道掘进煤帮片帮防治探究

Study on Prevention and Control of Coal Band Slab in Large Section Soft Rock Roadway Driving

本文依托霍尔辛赫3308运输顺槽掘进工作面临时支护失效导致多次煤帮片帮的事故发生的工程实际,采用现场调研的方法,确定运输顺槽围岩均为3#煤层,采用实验室岩石力学与SEM的方法确定顺槽围岩为软岩。结合现场实际,确定了顺槽临时支护失效的原因。提出"巷道顶帮联合控制"的掘进工作面临时支护原理,并进行了设计与应用。

In this paper, based on the engineering practice that the failure of support during the excavation of Halsinkh 3308 transport trench leads to the occurrence of many accidents of coal side and side, the method of field investigation is adopted to determine that the surrounding rock of transport trench is 3 # coal seam, and the surrounding rock of transport trench is determined to be soft rock by the method of laboratory rock mechanics and SEM. Combining with the field practice, the reasons for the failure of temporary support along the groove are determined.This paper puts forward the principle of"joint control of roof and side of roadway"in face of time support, and designs and applies it.