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一、确定浅孔凿岩钻头直径的依据以凿岩的角度来说有浅孔凿岩和深孔凿岩之分,一般所说的浅孔其炮孔深度在4米以内。我矿是一个井下开采多年的老矿山,一直是采用浅孔凿岩,采用硬质合金钻头,其直径为40～42毫米。这种钻头在我国浅孔凿岩的单位被广泛地使用,为什么采用这种直径的钻头呢?笔者认为在凿岩爆破中有的是由钻头直径来确定炸药简直径,有的是由使用的爆破器材来选择钻头直径的,浅孔凿岩是由当时的爆破
First, to determine the shallow hole rock drill bit diameter based on rock drilling point of view there is a shallow hole rock drilling and deep hole drilling points, the general said shallow hole blast hole depth of 4 meters. Mine is a mine mined for many years down the hole, has always been the use of shallow hole drilling, the use of carbide drill, the diameter of 40 to 42 mm. This kind of drill is widely used in the unit of shallow hole drilling in our country. Why do we use the drill of this diameter? The author thinks that in the rock blasting, some of them are determined by the drill diameter to determine the diameter of the explosive, and some are selected by the blasting equipment used Drill diameter, shallow hole drilling is the blasting then