In this study, a new horizontal pre-drainage system is suggested.
在这项研究中，一个新的横向预排水系统被建议。
The field test indicated that the developed drilling rig is appropriate for underground pre-drainage of coal seams.
现场试验表明，这是一种适于井下工作面钻进瓦斯预抽放短钻孔的轻便高效钻机。
An effective pre-drainage system in a limited area that has a high water head and huge inflow is important to prevent flooding accidents during subsea tunnelling.
一个有效的预排水系统在一个有限的区域内，有一个高水头，巨大的流入，重要的是要防止水浸事故发生的海底隧道。
Numerical analysis and a drainage performance analysis both show that the suggested horizontal pre-drainage system provides a clear drainage and water head reducing effect.
数值分析及排水效果均表明，所提出的水平预排水系统能及时排水并减小水压力。
The outburst risk index and gas gush feature are analysed during roadway progress. The result proves that the effectiveness of zonal gas pre-drainage by cross-measure boreholes.
消突效果检验后进行煤巷掘进，掘进期间通过对突出危险性指标和瓦斯涌出参数的分析，验证穿层钻孔区域预抽瓦斯消突技术的有效性；
The measurement method is demonstrated valid in outburst elimination by the examination of remnant gas pressure, pre-drainage rate and the zonal verification during the coal roadway driving.
残余瓦斯压力和预抽率的检验以及煤巷掘进期间的区域验证，均证明按该方法布置的预抽钻孔，消突效果有效。
The result indicates that pre vibration during forming columns and the drainage action of columns is available for the earthquake resistance of foundation.
结果表明：在碎石桩成桩过程中，对土层的预振作用、桩体的排水作用，将有利于土层的抗震。
The use of pre buried in the structural layer of the drainage pipe hole as a deformation of the default seam to prevent the development of cracks.
行使预埋在结构层中的排水管孔作为变形预设缝，防止裂缝开展。
From the point of all drainage basin flood control, to reach the optimization schedule, it requires maximum of the total pre-kept ability.
从整个流域防洪角度，要求流域内水库群的总余留防洪能力最大，以满足调度最优化的要求。
The dwelling house and the slope are stabilized by construction of piles in pre-bored holes and improvement of dewatering & cut-off drainage measures.
通过在相应部位施工钻孔灌注桩，完善相关排水、隔水系统等措施，使住宅和边坡达到稳定。
The hole enlargement by high - pressure water jet provided a feasible technical way for raising gas drainage effect from coal seam in low permeability and improving the effect of outburst pre...
高压水射流扩孔为提高低透气性煤层的瓦斯抽放效果和扩大防突措施的效果提供了一个可行的技术途径。
The hole enlargement by high - pressure water jet provided a feasible technical way for raising gas drainage effect from coal seam in low permeability and improving the effect of outburst pre...
高压水射流扩孔为提高低透气性煤层的瓦斯抽放效果和扩大防突措施的效果提供了一个可行的技术途径。
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