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- Abstract: In this paper,technology for water injection by long bore hole in fully mechanized mining face was studied,relevant experience and some parameter were acquired,which provide a reference for using this method in similar faces. 文摘:以郑州矿区典型的“三软”煤层综放工作面为对象，试验研究了长钻孔注水防尘技术，取得了“三软”煤层长钻孔注水经验和参数，为郑州矿区类似条件的工作面推广该方法提供了参考。
- In this paper,technology for water injection by long bore hole in fully mechanized mining face was studied,relevant experience and some parameter were acquired,which provide a reference for using this method in similar faces. 以郑州矿区典型的“三软”煤层综放工作面为对象，试验研究了长钻孔注水防尘技术，取得了“三软”煤层长钻孔注水经验和参数，为郑州矿区类似条件的工作面推广该方法提供了参考。
- Test and research on blasting with long bore hole in gateway top coal caving 长孔爆破在巷道放顶煤中的试验研究
- Pressure releasing and gas drainage with long bore hole in roof overburden of fully mechanized caving face 综放面顶板覆岩走向长钻孔卸压抽放瓦斯研究
- long bore hole 长钻孔
- During long bear markets, that optimism is unwound. 而在长期熊市之时，这种乐观情绪不复存在。
- Influenced by effect of bore hole afterflow,a long closes time is needed for pressure build up test in low permeability reservoir. 受井筒续流效应的影响,低渗透油藏的压力恢复试井需要较长的关井时间。
- Stamp-tax, press the flower, engraving and bore hole the series ceiling. 印花、压花、浮雕、穿孔系列天花板。
- Bears hole up for the winter to go by. 熊蛰伏在穴中过冬。
- Bears hole up for the winter to go by . 熊蛰伏在穴中过冬。
- The function of an auger is to bore holes. 麻花钻的功用是钻孔。
- And that is a torment I can no longer bear. 持续下去的还有我再也无法忍受的折磨。
- Above the inversion point the temperature in the bore hole decreases as the depth decreases. 在反向点以上，井孔内的温度将随着深度的变浅而下降。
- The contact between drillstring and bore hole wall in the process of horizontal drilling is of large area and geometrically nonlinear. 长中半径水平井钻柱与井壁的接触问题是大面积接触的几何非线性问题。
- Pumps can bring water from mains water storage tanks or bore holes. 水泵可以从主蓄水池或钻孔中抽水。
- HRS88-1, borehole is another Quaternary borehole drilled after Shun-5 bore hole in the north of the Beijing Plain. HR88－1孔是北京平原区北部继顺5孔之后，又一重要的第四系钻孔。
- This tech has feature of measuring full data, saving operation time and losing cost which avoids bore hole disturbance and killing fluid influence. 该技术测取资料齐全,节约作业时间,降低作业成本,避免了井筒干扰和压井液的影响。
- Graham added a more startling note: Investors would be 'enviably fortunate' to benefit from the 'advantages' of a long bear market. 格拉汉姆还提出了一个更令人吃惊的说法：投资者可以把握长期熊市的“大好时机”获利，这样的运气好得令人 慕。
- A series of new formulae for bore hole projection analysis and their applicability for various bore structures and models are suggested. 本文针对现行钻孔投影解析法存在的问题,提出钻孔投影计算公式与投影计算孔段的结构有关,即孔口位置(是否在勘探线上)、岩层走向及勘探线三者间的相互位置不同,其计算公式也不同。 据此,提出了196种孔段平面结构和18种模式的钻孔走向投影水平增量计算系列新公式。
- As a typical example, the contact-impact problem between the drillstring and the bore hole wall in oil field has been calculated and analysed. 文中针对石油工程中钻柱这类典型的细长杆与圆形井壁的接触碰撞问题进行了求解。
