1) large diameter bend borehole
大直径拐弯钻孔
1.
Drilling techniques of large diameter bend borehole which was the replacement of slant tunnel for gas discharge were researched in Yangquan.
在阳泉矿区进行了替代倾斜高抽巷的大直径拐弯钻孔施工工艺的研究,共完成6个试验孔,试验孔造斜段平均弯曲强度达到1·2°/m,钻孔总进尺378·55m。
2) bended borehole
拐弯钻孔
1.
Six large diameter bended boreholes were drilled in Yangquan Coal Mine.
对于通过上邻近层抽放瓦斯的煤矿,如果使用受控定向钻进技术施工大直径拐弯钻孔,和常规钻孔相比较,就可以在保证钻孔轨迹远离垮落带的同时,延长钻孔在卸压带的长度,实现高效安全抽放瓦斯。
3) great diameter perforate
大直径钻孔
1.
According to Yangquan coal miningpractice, launches the application study that the great diameter perforate substituted with the trough to traverse into technology in opening, and popularizes and applies to gas drainage from adjacent layer.
针对阳泉煤业集团某矿实际,开展大直径钻孔替代顺槽横贯成孔工艺的应用研究,推广应用于邻近地层瓦斯抽放孔的施工工程中,为高瓦斯矿的瓦斯抽放寻找一种新的技术途径。
4) large diameter regular borehole
大直径常规钻孔
5) long drilled pile with large diameter
大直径长钻孔桩
6) big diameter pre-borehole
大直径预钻孔
补充资料：拐弯
（～儿）①行路转方向：拐了三道弯儿丨车辆～要慢行。②（思路、语言等）转变方向：话说得离题太远，不容易拐过弯儿来。③拐角
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条