挖改潛孔(kong)(kong)鉆(zhan)機(ji)(ji)壓縮空氣為動力的中(zhong)深(shen)孔(kong)(kong)鑿巖設(she)備(bei)主要(yao)用(yong)(yong)于井下(xia)采礦(kuang)場接桿鉆(zhan)鑿上向扇型或環型中(zhong)深(shen)孔(kong)(kong)的石方工(gong)(gong)程。適用(yong)(yong)于巷道斷面為2.5*2.5m到3m*3m鉆(zhan)孔(kong)(kong)直(zhi)徑50－80cm，有效(xiao)孔(kong)(kong)深(shen)30m。采用(yong)(yong)直(zhi)徑65mm的十字型合金釬頭(tou)在F12-14級礦(kuang)巖中(zhong)，平均(jun)純(chun)鑿巖速度可達680mm/分。鉆(zhan)架結(jie)構簡(jian)單(dan)。鑿巖機(ji)(ji)拆運(yun)方便，工(gong)(gong)作安(an)全可靠，效(xiao)率高。用(yong)(yong)于冶(ye)金礦(kuang)。