通(tong)(tong)過(guo)(guo)鉆(zhan)(zhan)孔(kong)機(ji)(ji)的(de)電機(ji)(ji)驅動(dong)液壓(ya)(ya)(ya)電機(ji)(ji)工(gong)(gong)作(zuo)的(de)機(ji)(ji)器叫做反井(jing)鉆(zhan)(zhan)機(ji)(ji)。 液壓(ya)(ya)(ya)馬(ma)達驅動(dong)動(dong)力(li)(li)單(dan)元，扭矩通(tong)(tong)過(guo)(guo)液壓(ya)(ya)(ya)動(dong)力(li)(li)傳遞到(dao)鉆(zhan)(zhan)井(jing)工(gong)(gong)具系(xi)統，該動(dong)力(li)(li)驅動(dong)鉆(zhan)(zhan)桿(gan)和(he)鉆(zhan)(zhan)頭(tou)旋轉(zhuan)。 鉆(zhan)(zhan)頭(tou)上的(de)滾(gun)刀(dao)受鉆(zhan)(zhan)壓(ya)(ya)(ya)，沿井(jing)底巖石(shi)工(gong)(gong)作(zuo)面的(de)純滾(gun)動(dong)和(he)微滑動(dong)作(zuo)用(yong)。 同時，主缸產生的(de)軸向拉力(li)(li)和(he)壓(ya)(ya)(ya)力(li)(li)也通(tong)(tong)過(guo)(guo)動(dong)力(li)(li)頭(tou)，鉆(zhan)(zhan)桿(gan)作(zuo)用(yong)在鉆(zhan)(zhan)頭(tou)上，使(shi)鉆(zhan)(zhan)頭(tou)的(de)滾(gun)刀(dao)在鉆(zhan)(zhan)壓(ya)(ya)(ya)的(de)作(zuo)用(yong)下滾(gun)動(dong)，產生沖擊(ji)載荷，使(shi)滾(gun)刀(dao)齒(chi)撞(zhuang)擊(ji)并擠壓(ya)(ya)(ya)巖石(shi)；通(tong)(tong)過(guo)(guo)擠壓(ya)(ya)(ya)和(he)剪切，打破巖石(shi)。

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??在(zai)傳(chuan)統的(de)施(shi)(shi)工(gong)(gong)方法中(zhong)(zhong)，需(xu)要工(gong)(gong)作人員在(zai)井(jing)眼各(ge)段(duan)進(jin)(jin)行(xing)排(pai)渣，支(zhi)撐(cheng)(cheng)和(he)(he)其他操作。與傳(chuan)統施(shi)(shi)工(gong)(gong)方法相比，反井(jing)鉆機技術具(ju)有以下優點，可(ke)顯著提(ti)高(gao)施(shi)(shi)工(gong)(gong)進(jin)(jin)度：煤石的(de)排(pai)泄是(shi)由較低巷道的(de)運輸系統處理的(de)，特別是(shi)當井(jing)筒較深時(shi)，反井(jing)鉆機的(de)效率更高(gao)；由于在(zai)施(shi)(shi)工(gong)(gong)過程(cheng)中(zhong)(zhong)無需(xu)人員進(jin)(jin)入井(jing)筒，井(jing)筒穿過的(de)巖性(xing)為致密的(de)砂巖和(he)(he)石灰石，因此無需(xu)及時(shi)支(zhi)撐(cheng)(cheng)墻體(ti)以防止受(shou)傷。

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??傳(chuan)統(tong)的施工方法包括鉆孔，爆破，支撐等，勞(lao)動強度(du)大，勞(lao)動條件(jian)艱(jian)苦。以某(mou)礦為(wei)(wei)例，每(mei)班(ban)(ban)12人以上，每(mei)班(ban)(ban)前進速(su)度(du)2m。使(shi)(shi)用(yong)反井鉆機(ji)時，每(mei)班(ban)(ban)只需4-5人，前進速(su)度(du)為(wei)(wei)每(mei)小時100m，勞(lao)動強度(du)和施工條件(jian)得(de)到(dao)根(gen)本改善。因為(wei)(wei)施工人員不用(yong)進入(ru)井中，所以他們的安(an)全是有保證的。使(shi)(shi)用(yong)反井鉆機(ji)時可以使(shi)(shi)井洞(dong)變形率小于1%，大大減少了對(dui)圍(wei)巖的破壞(huai)，保證了安(an)全。