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自从煤炭部确定推广锚喷支护以来,全国重点煤矿锚喷支护的使用范围不断扩大,从稳定的岩石巷道到松软破碎不稳定岩层的巷道都有较普遍的应用,这主要是由于锚喷支护具有快速、安全、高效、节约等优点。但是还存在一些实际问题,最突出的是粉尘和口弹问题,如果不尽快解决,就会影响喷射混凝土施工技术的发展,而降低粉尘浓度、降低回弹(即通称的“双降”)是当务之急。部西安会议以后,我们采取了如下做法,获得了显著的效果。1.改转子-Ⅱ型干式喷射机为潮料喷射机为使锚喷机具适应锚喷技术的迅速发
Since the Ministry of Coal has decided to promote the bolting and shotcrete support, the use of anchor and shotcrete support in key coal mines in the country has been expanding. The applications from stable rock tunnels to loose and unstable rock formations are more common due to the application of anchor spray Support with fast, safe, efficient, economical and other advantages. However, there are still some practical problems. The most prominent ones are dust and bombs. If they are not resolved as soon as possible, the development of shotcrete construction technology will be affected. Reducing the concentration of dust and reducing the rebound (the so-called “double drop”) Top priority. After the Xi’an Conference, we have taken the following approach and achieved remarkable results. 1. Rotor-Ⅱ-type dry jet for the influx of jet machines for the anchor spray gun to adapt to the rapid spraying technology