近年来,四十九工程处矿建二队在工程施工中采用喷射混凝土支护,同时针对该支护方法亟待解决的粉尘及回弹问题做了一些工作,取得了较好的成效。一、基本情况矿建二队近年施工工程多为断面15～20平方米的岩石大巷,永久支护形式为锚杆喷射混凝土,混凝土厚150毫米。爆破作业基本达到光面爆破要求。 In recent years, the 49th Mines Construction Second Team of the Agency has used shotcrete support in the construction of the project. At the same time, it has done some work on the dust and rebound problems that need to be solved in the support method, and has achieved good results. First, the basic situation Mine construction team in recent years, most of the construction works for the section of 15 to 20 square meters of rock lanes, permanent support in the form of bolt shotcrete, concrete thickness of 150 mm. Blasting operations basically meet the requirements of smooth blasting.