在一切需要凿岩放炮的土石工程中,凿岩机作业除尘一直是一个引人注目的问题。通常的钎杆中心孔注水的湿式凿岩方法是行之有效的。然而据我的调查,许多中、小型矿山却仍然“干打眼”。什么原因乃至如此? 1.矿山缺水源; 2.小矿缺资金和原材料,难以铺设井下供水系统; 3.高寒地区, In all the earth-rock projects that require rock-blast blasting, dust extraction from rock drilling operations has always been a conspicuous problem. The usual wet rock drilling method for water injection through the center hole of the drill rod is effective. However, according to my survey, many small and medium-sized mines are still “drowning.” What causes and even so? 1. Mines lack of water; 2. Small mines lack of capital and raw materials, it is difficult to laying underground water supply system; 3. Alpine regions,