1) distribution of boreholes
钻孔分布
1.
This study, which is useful for evaluating coal bed methane resources, analyzes the methane content in coal bed and the features of distribution of boreholes, points out the inappropriateness of reflecting general feature of methane content through mean value of methane content, and proposes a new method of regression analysis.
分析煤层甲烷含量和钻孔分布特征,指出用甲烷含量平均值来反映甲烷含量总体特征是不合适的。
2) drill lixiviant distribution
钻孔布液
1.
A new type of irrigator multi-hole outflow pipe is developed which is suitable for drill lixiviant distribution for stope leaching, and a calculation method is put forward for pipe network's resistance and flow distribution.
为解决原地爆破浸出钻孔布液中存在的溶液分配不均匀问题 ,引用了微灌技术。
3) layout of drill hole
钻孔布置
1.
The layout of drill hole and the determination of parameter in advanced water injection to prevent rockburst from occurring;
预防冲击地压煤层掘进注水钻孔布置与参数的确定
4) boreholeanalysis
钻孔分析
5) boulder blasting
分块钻孔
6) directional branch hole
分支钻孔
1.
The construction of directional branch hole in steep orebody can not only save drilling workload,reduce drilling rig relocation and road repairing,but also is helpful for environmental protection and improving geological prospecting effect.
在陡斜矿体上施工分支钻孔,不但节约钻探工作量,减少钻机搬迁、修路次数,对环境保护和提高地质找矿效果也有重要意义。
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