drainage hole

A new method of close drainage hole simulation in the seepage control analysis

渗流控制分析中密集排水孔模拟的新方法

Improved coupling method of analytical solution for drainage hole and FEM

改进的排水孔解析解和有限元耦合计算方法

The drainage hole in the analysis of using air element method to simulate seepage field

空气单元法模拟渗流场分析中的排水孔

Experimental Study on Extinguishing Fire in Gas Drainage Hole by Fine Spray

细水雾扑灭瓦斯抽放钻孔火灾的实验研究

The new measuring method for distance of the gas drainage hole and seam permeability

瓦斯抽采孔孔距及煤层透气性的测定方法

Separation Material Analyzing of Spillway Drainage Hole in Hydroelectric Power Station

水电站溢洪道排水孔析出物分析

The thermal dynamic analysis of tunnel drainage hole in the perennial frozen soil

多年冻土中隧道泄水洞热动态分析

Large Diameter Drainage Hole Drilling Technique in Huaibei Coal Mine

淮北煤矿大口径排水孔施工技术

Optimization Analysis on Three-dimensional Flow Field of Design Schemes for Drainage Hole of Underground Cavity Group

地下洞室群排水孔设计方案三维渗流场优化分析

Watch out ! You almost fell into the drainage hole .

小心！你差点掉到下水道里去了。

Pipe to represent hole & numerical method for simulating single drainage hole in rock masses

以管代孔&排水孔模拟方法探讨

Research and application of the technique of stopping the drainage hole quickly by chemical method in the structure fracture zone

应用化学法在构造裂隙带快速封堵抽放钻孔技术的研究与应用

Practice and Cognition of Gas Drainage Hole Construction Along Roof Trend in Fully Mechanized Caving Coal Face

综放工作面顶板走向瓦斯抽放孔施工的实践与认识

According to seepage theory , the gas seepage from drainage hole along coal seam is studied by means of electrical simulation experiment .

根据渗流理论，本文对沿层抽放钻孔周围的瓦斯渗流问题进行了电模拟实验研究。

Use a pin or a needle to pierce the bottom of the shell creating a drainage hole .

使用大头针将蛋壳底部穿孔，用来排水。

This paper briefly analyzes separation material in drainage hole and the related data , the primary discussion is made to the formation reason of separation material .

简要分析了排水廊道析出物及与之相关的基本资料，对析出物的成因进行了初步探讨。

Then using the superposition principle of well group , the analytic theory of single drainage hole is spread to multiple drainage holes in the element .

然后，应用井群的叠加原理，将单个排水孔的解析理论推广到单元内多个排水孔的情况。

Place pump inside pot with the electrical cord running outside of the drainage hole , then use a silicone sealant to seal the hole .

把水泵固定在缸里，电线通过排水口拖到缸外，用硅胶把洞封好。

Based on the point set base solutions , the approximate solution formula of single drainage hole in the finite element has been ascertained by the superposition principle .

应用叠加原理，在点汇基本解的基础上，推导出了有限元单元内单个排水孔的近似解表达式。

Use a 5 / 8-inch drill bit , then a coarse cylindrical rasp to enlarge the drainage hole .

转一个5/8英寸的洞，然后用锉刀把这个排水口搞大点。

The drainage hole is an important seepage control measure , so it is one of the key problems to simulate the effect of the drainage hole in the seepage analysis .

排水孔是重要的渗控措施，如何准确模拟排水孔的作用是渗流分析中的关键问题之一。

The tube body and the tube bottom of the round tube are fixed together , the tube body adopts a cylinder , and a water drainage hole is arranged at the tube bottom .

圆桶的桶体和桶底固定在一起，桶体形状为圆柱体，桶底上开有透水孔。

Then the author studies on the effect rule of structure internal force with different structure types of lining drainage hole or different water pressure , and carries out the comparative analysis of the results between the numerical simulation and model test .

研究泄水式管片衬砌泄水孔存在形态及水压变化对结构内力的影响规律，并对数值模拟和模型试验结果进行了对比分析。

The fault dealing main points and methods of the stilling pool , the filter protection design of the drainage hole , the concrete tuck design of the fault and the structure design of prestressed anchorage cable were introduced here .

介绍黄河小浪底工程泄水建筑物出口消力塘断层处理要点和方法，排水孔反滤保护设计，断层混凝土塞设计，预应力锚索结构设计。

The problem of solving the seepage field with complicated boundaries frequently involves rainfall infiltration boundary as well as densely-distributed drainage hole boundary . This is in general an unsaturated seepage problem , and therefore , the traditional steady saturated drainage substructure model is not applicable any more .

有复杂边界面的渗流场求解问题经常会同时涉及降雨入渗边界和密集排水孔边界，这一般是一个非饱和渗流问题，因此传统的稳定饱和排水子结构模型不能适用。

The results showed that the fire extinguishing system with fine water sprays is completely suitable for fire extinguishing of underground gas drainage hole . This technique not only possesses good fire-extinguishing performance , but also the advantage of dust suppression , no-pollution , fire prevention and so on .

结果表明：细水雾灭火系统完全适合于煤矿井下瓦斯抽放钻孔火灾的防治，不但其灭火效果优于传统的灭火方法，而且还有降尘、不污染环境、预防火灾发生等优点。

Sealing of the drainage drilling hole which will affect gas drainage efficiency is the key link during the gas drainage .

煤矿在进行瓦斯抽放时，抽放钻孔的密封是影响瓦斯抽放效率的关键环节。

The conclusion was close to the theoretical calculation conclusion , it had the certain reference value and made very good significance for coal mine gas drainage reasonable hole sealing .

该结果与理论计算结果之间的误差较小，具有一定的参考价值，这对煤矿瓦斯抽放合理封孔具有很好的指导意义。

The total leakage consists of two parts , drainage through leakage hole and leakage through seal faces .

将泄漏分为两部分，经过泄放孔的排放量和端面密封引起的泄漏量。

For the first part , regard leakage hole as convergent nozzle and drainage through leakage hole can be got according to equation of continuity .

对第一部分，把泄放孔等效为收缩喷嘴，根据连续性方程得到经过泄放孔的泄漏。