光面爆破、锚喷支护作为一项新的井巷支护施工技术,在我国煤炭战线上已经得到愈来愈广泛的应用和推广。理论上的探讨、工艺上的提高、机具上的改进使这项井巷支护施工技术逐步得到完善。但是,采用钻爆法施工的井巷,在“破岩”完成之后,“护岩”进行之前均有一个顶板悬露威胁施工安 As a new construction technology of mine shaft support, smooth blasting and bolt-shot blasting support have been more and more widely applied and popularized in China’s coal front. Theoretical discussion, improvement of technology and improvement of equipment have gradually improved the construction technology of this roadway support. However, the use of drilling and blasting of the construction of the roadway, in the “rock breaking” is completed, “rock protection” before the roof there is a threat to the construction safety