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我队于一九七五年六月在某含铜砂岩坑道内,使用了东方红-23型凿岩机。这种内燃凿岩机是适用于地表凿岩的。为了适应坑内作业,必须解决通风,废气净化和温式凿岩等
Our team used a Dongfanghong-23 rock drill in a copper-bearing sandstone tunnel in June 1975. This internal combustion rock drill is suitable for surface rock drilling. In order to adapt to pit operation, must solve the ventilation, exhaust gas purification and temperature rock drilling