挖改潛孔(kong)鉆(zhan)機壓縮空氣(qi)為(wei)動力的(de)中(zhong)(zhong)深孔(kong)鑿(zao)(zao)巖(yan)(yan)設備主要用(yong)于井下采礦場接桿鉆(zhan)鑿(zao)(zao)上(shang)向扇型或(huo)環型中(zhong)(zhong)深孔(kong)的(de)石方(fang)工程。適用(yong)于巷(xiang)道斷面為(wei)2.5*2.5m到3m*3m鉆(zhan)孔(kong)直徑50－80cm，有(you)效孔(kong)深30m。采用(yong)直徑65mm的(de)十字型合金釬頭(tou)在(zai)F12-14級礦巖(yan)(yan)中(zhong)(zhong)，平均純鑿(zao)(zao)巖(yan)(yan)速度(du)可達680mm/分(fen)。鉆(zhan)架結構簡單。鑿(zao)(zao)巖(yan)(yan)機拆運方(fang)便，工作安全可靠，效率高(gao)。用(yong)于冶金礦。