pre-drainage

pre-drainage

美 　英

• 網絡預疏放水

例句

In this study, a new horizontal pre-drainage system is suggested.

據此，提出了新水平預排水系統。

Among various ways of coal-bed gas drainage, pre-drainage from surface boreholes has the highest utilization value in industry.

煤層氣抽排方式中，地面鉆孔預抽排最有工業利用價值。

Investigation and Application of Gas Pre- drainage Technique along Regional Bedding Strip in Coal Seams with Low Gas Permeability

區域順層條帶預抽瓦斯防突技術在低透氣煤層中的考察應用

Controlled blasting technique to improve gas pre-drainage effect in a coal mine

提高煤礦瓦斯抽放效果的控制爆破技術

Using Gas Desorption Index to Determining Gas Pre-drainage Rate of Outburst Seam

利用瓦斯解吸指標確定突出煤層瓦斯預抽有效抽放率

Mine gas pre- drainage through underground horizontal boreholes

利用多邊橫向鉆孔進行礦井瓦斯抽放研究

Test of Improving Gas Pre- drainage Effect from Cross- seam Holes by Hole Enlargement with Water Jet

高壓水射流擴孔提高穿層鉆孔預抽效果的試驗

Preliminary Application of Gas Pre-drainage from Coal Seam by Long Holes in Heading Face to Prevent Coal and Gas Outburst

掘進工作面應用長鉆孔預抽煤層瓦斯防止煤與瓦斯突出的效果

Probing into Regional Gas Pre-drainage by Long Holes along Coal Seam

利用順煤層長鉆孔工藝實行區域性預抽瓦斯的探索

Teat on Rational Bore-hole Parameters of Gas Pre-drainage by Holes along Seam in Chengzhuang Mine

成莊礦順層鉆孔預抽煤層瓦斯的合理鉆孔參數試驗

Study and analysis on gas pre-drainage results of coal mining face

工作面瓦斯預抽效果考察與分析