挖改潛(qian)孔(kong)鉆(zhan)(zhan)機壓縮空氣為動力(li)的(de)中(zhong)深(shen)孔(kong)鑿(zao)(zao)巖(yan)設備主要用(yong)于(yu)井下采(cai)礦場接桿鉆(zhan)(zhan)鑿(zao)(zao)上向扇型(xing)或環型(xing)中(zhong)深(shen)孔(kong)的(de)石(shi)方(fang)工程。適用(yong)于(yu)巷道斷(duan)面為2.5*2.5m到3m*3m鉆(zhan)(zhan)孔(kong)直徑(jing)50－80cm，有效孔(kong)深(shen)30m。采(cai)用(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(chun)鑿(zao)(zao)巖(yan)速(su)度可(ke)(ke)達680mm/分。鉆(zhan)(zhan)架結(jie)構簡(jian)單(dan)。鑿(zao)(zao)巖(yan)機拆運方(fang)便，工作安全可(ke)(ke)靠，效率(lv)高。用(yong)于(yu)冶金礦。