摘要
优化实芯高效组合钻头、螺旋钻杆,增加通水变节,将干式螺旋排渣转变为高压水冲排渣,使用ZQSJ-140/4.3手持式气动钻机配合改进后的钻具,采用高压水冲排渣施工底煤卸压钻孔,提高了钻进效率。
The solid core efficient combination drill and the spiral drill pipe are optimized , and the water may be increased to change the dry deslagging into spiral high-pressure water deslagging . ZQSJ-140/4.3 hand-held pneumatic drilling machine combined with improved drilling tool and the relief boreholes for construction bottom coal by using high-pressure water deslagging are used to improve drilling efficiency.
出处
《煤炭科技》
2017年第1期62-63,共2页
Coal Science & Technology Magazine
关键词
干式排渣
水冲排渣
中空通水
Dry deslagging
Water deslagging
Hollow water
