今年我队在手掘坑道普遍采用了湿式凿岩，主要是根据我队具体情况，自力更生，自制加工了旁侧供水器，借中空钢钎向炮眼内送水。在生产实践中深受工人同志的欢迎。并在提高穿孔速度，根除斫岩尘源等方面；取得了良好效果。同时配合使用喷雾洒水和机械通风，使坑内矽尘控制在国家标准2毫克/立方米以下。 This year my team in the hand excavation tunnel commonly used wet rock drilling, mainly based on our team specific circumstances, self-reliance, self-processing side of the water supply by hollow steel brazing water to the hole. In the production practice by the workers comrades welcome. And in improving perforating speed, eradication of rock dust source and so on; achieved good results. At the same time with the use of spray watering and mechanical ventilation, the pit of silica dust control in the national standard 2 mg / cubic meters below.