挖改潛孔(kong)(kong)(kong)鉆機壓(ya)縮(suo)空氣為(wei)(wei)動力(li)的(de)中(zhong)深(shen)(shen)孔(kong)(kong)(kong)鑿巖(yan)設備主(zhu)要用(yong)(yong)于井下采礦場接桿鉆鑿上向扇型(xing)或環型(xing)中(zhong)深(shen)(shen)孔(kong)(kong)(kong)的(de)石方工(gong)程。適(shi)用(yong)(yong)于巷道斷面為(wei)(wei)2.5*2.5m到(dao)3m*3m鉆孔(kong)(kong)(kong)直徑(jing)50－80cm，有效孔(kong)(kong)(kong)深(shen)(shen)30m。采用(yong)(yong)直徑(jing)65mm的(de)十字型(xing)合金釬頭在F12-14級礦巖(yan)中(zhong)，平(ping)均純鑿巖(yan)速度可(ke)達680mm/分。鉆架(jia)結(jie)構簡單。鑿巖(yan)機拆運方便，工(gong)作安全可(ke)靠，效率高。用(yong)(yong)于冶金礦。