挖改潛孔(kong)(kong)(kong)鉆(zhan)(zhan)機(ji)壓縮空氣為動力的(de)中(zhong)深(shen)孔(kong)(kong)(kong)鑿(zao)(zao)巖(yan)設備(bei)主要用(yong)(yong)于井下(xia)采(cai)(cai)礦場接桿鉆(zhan)(zhan)鑿(zao)(zao)上(shang)向扇型或環型中(zhong)深(shen)孔(kong)(kong)(kong)的(de)石方(fang)工程。適(shi)用(yong)(yong)于巷道斷(duan)面(mian)為2.5*2.5m到3m*3m鉆(zhan)(zhan)孔(kong)(kong)(kong)直徑50－80cm，有效孔(kong)(kong)(kong)深(shen)30m。采(cai)(cai)用(yong)(yong)直徑65mm的(de)十(shi)字(zi)型合金釬頭(tou)在F12-14級礦巖(yan)中(zhong)，平均純鑿(zao)(zao)巖(yan)速度(du)可達680mm/分。鉆(zhan)(zhan)架結(jie)構(gou)簡單。鑿(zao)(zao)巖(yan)機(ji)拆(chai)運方(fang)便(bian)，工作安全可靠，效率高。用(yong)(yong)于冶(ye)金礦。