探矿工程-岩土钻掘工程
探礦工程-巖土鑽掘工程
탐광공정-암토찬굴공정
EXPLORATION ENGINEERING (DRILLING & TUNNELING)
2014年
11期
24-27
,共4页
王新%杨卫东%战启帅%刘伟%王天放
王新%楊衛東%戰啟帥%劉偉%王天放
왕신%양위동%전계수%류위%왕천방
瓦斯抽排孔%多工艺钻进%气动潜孔锤%气举反循环%双壁钻杆%组合牙轮钻头%多级扩孔
瓦斯抽排孔%多工藝鑽進%氣動潛孔錘%氣舉反循環%雙壁鑽桿%組閤牙輪鑽頭%多級擴孔
와사추배공%다공예찬진%기동잠공추%기거반순배%쌍벽찬간%조합아륜찬두%다급확공
gas drainage hole%multi-process drilling%pneumatic DTH hammer%air lift reverse circulation%double-wall drill pipe%combined cone bit%multilevel reaming
大同煤矿集团公司塔山煤矿4号瓦斯抽排孔终孔口径为1200 mm，孔深423畅66 m，孔底位移≯2 m。孔径大、钻孔深、精度高是本工程的主要难点。钻进施工中采用了气动潜孔锤、双壁钻杆气举反循环及组合牙轮多级扩孔等多种工艺，提高了钻进效率，保证了孔身质量，取得了良好的经济效益和社会效益。
大同煤礦集糰公司塔山煤礦4號瓦斯抽排孔終孔口徑為1200 mm，孔深423暢66 m，孔底位移≯2 m。孔徑大、鑽孔深、精度高是本工程的主要難點。鑽進施工中採用瞭氣動潛孔錘、雙壁鑽桿氣舉反循環及組閤牙輪多級擴孔等多種工藝，提高瞭鑽進效率，保證瞭孔身質量，取得瞭良好的經濟效益和社會效益。
대동매광집단공사탑산매광4호와사추배공종공구경위1200 mm，공심423창66 m，공저위이≯2 m。공경대、찬공심、정도고시본공정적주요난점。찬진시공중채용료기동잠공추、쌍벽찬간기거반순배급조합아륜다급확공등다충공예，제고료찬진효솔，보증료공신질량，취득료량호적경제효익화사회효익。
The terminal diameter and depth are 1200mm and 423.66m respectively in 4#gas drainage borehole of Tashan coal mine of Datong Coalmine Group Company with displacement less than 2m.The main difficult points in this project are large borehole diameter, deep drilling and high precisiom.Multi-process of pneumatic DTH hammer, double-wall drill pipe air lift reverse circulation and combined cone multilevel reaming were adopted to improve drilling efficiency, ensure well-bore quality, and achieve good economic and social benefits.
