1) surface vertical borehole
地面垂直钻孔
2) borehole perpendicularity
钻孔垂直度
3) surface borehole
地面钻孔
1.
Such measures like reducing air-leak in goaf,disposing hole near to return airway,controlling extracting pressure to range from 40 to 60 kPa and space between holes 200 to 300 m and so on are useful to promote the efficiency of surface borehole.
通过对比研究淮南矿业集团各矿区试验钻孔抽采数据,在明确地面钻孔抽采瓦斯机理的基础上,运用理论分析及数值模拟的手段,分析总结了地面钻孔抽采采空区瓦斯效率的影响因素,并针对具体影响因素提出了提高钻孔抽采效率的相关建议。
4) ground vertical deformation
地面垂直地形变
1.
In this paper, an attempt has been made to separate the tectonic active deformation from the total of Xi an ground fissure and ground vertical deformation with digital filter theory after analysing their time series characteristics.
运用数字滤波理论来区分西安地裂缝、地面垂直地形变活动量中构造活动变形量和释水固结压密变形量。
5) borehole of high verticality
高垂直度要求钻孔
6) vertical drilling
垂直钻井
1.
Theoretical and technical investigation of automatic vertical drilling tools;
自动垂直钻井工具的理论与技术研究
2.
During the drilling of 406mm section, the vertical drilling technique(VertiTrak)pro.
为防斜打快,在Φ406井段使用了贝克休斯垂直钻井技术。
3.
Commonly used taper drills, pendulum drills, full-hole drills, bias-axis drills, rigid drill collar, hinge-connecting drills, and rotary-pounding drills all are part of passive angle-preventing techniques which can not meet demands for vertical drilling in deep, ultra-deep, and complex wells.
垂直钻井是当今世界性钻井难题之一,它具有减少套管层次和套管尺寸、提高机械钻速、减少钻柱事故的优点。
补充资料：地表钻孔抽水
地表钻孔抽水
dewatering through well
d{bjoo之uankong ehoushu}地表钻孔抽水(dewatering through well)为了解除矿区地下水害威胁，在地表矿区边界之外的来水方向上围绕矿体开凿若干个大直径钻孔，在钻孔内安放深井泵或潜水泵排水，使矿区开采地段处于疏干降落漏斗水面之上的疏干方法。钻孔布置见矿山深井降水孔平面图。钻孔直径D可按公式D一d十50+2 了尸·、’· 户。’\。。/ 望‘，卜’。 户)’力价 /{/。一、\ 匕一办’\ 矿山深井降水孔的平面图 l一来水方向;2一抽水钻孔; 3矿区;4一隔水层(a十b)计算。其中d为水泵的最大外径，mm;。为过滤管的厚度，mm;b为充填料的厚度，mm。地表钻孔抽水疏干在地表进行，施工简单、方便，劳动条件好、施工管理容易，钻孔的布置及疏水设备的迁移都比较灵活。因此，在条件允许的情况下，应该尽量采用地表钻孔抽水，疏干矿床。 (张福有)
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