查询词典 coal

The practice of bolt support in reserved coal drift in mining pressure area is introduced,helpful conclusion is obtained through observation and analyse.

介绍了煤巷锚杆支护在动压区留巷的实践，并通过观测及数据分析，得出了有借鉴意义的结论。

It could be used widely for exploration and prospecting of geology, metallurgy, coal, hydrological well, engineering and other industries drilling with diamond bit or tungsten-carbide tipped bit.

它可广泛应用于勘探和地质勘探，冶金，煤炭，水文，工程和其他行业的钻探与金刚石钻头或硬质合金打破位。

Coal seam methane well ; drilling technology ; non-linear contact analysis ; Downhole Hammer Drilling ; rotary drilling

吉林大学；张龙飞煤层气井；钻井工艺；非线性接触分析；潜孔锤钻进；回转钻进

Analyzing the calculating process of belt conveyor with high angle theoretically, starting from its theoretic calculate the cross sectional area of materials and peripheral force, shaft power of drum, power of motor, using point by point method to get the resultant strain of every drum and torsion of driving drum, calculating the maximum strain and the maximum reverse stopping torque, to give the support on theory for using belt conveyor with super-long distance, high angle under the coal mine.

本文针对长运距、大倾角、高强度带式输送机设计过程中存在的问题，从四个方面对大倾角带式输送机进行分析研究：从理论上解析大倾角带式输送机的计算过程，从大倾角带式输送机的理论入手，详细计算物料的横截面面积、圆周力、滚筒轴功率和电机功率，利用逐点计算法计算各个滚筒的合张力以及传动滚筒的扭距，计算出胶带的最大张力和最大逆止力矩，给长运距、大倾角皮带机在煤矿井下的使用给予理论上的支持。

For the characteristics of driving working face of chinese coal mine,designing three types of structural model of wet centrifugal precipitator.

针对中国煤矿综掘工作面的产尘特点，设计了湿式离心除尘器3种结构模型。

This article introduces the situation of using the longhole shock blasting technology to prevent gas and coal outburst in driving face ,analyzes the application result.

介绍了在掘进工作面应用深孔松动爆破技术预防煤与瓦斯突出的实施情况，并对应用效果进行了分析。

The paper intrtroduced some partial ventilation management methods at driving face in coal tunnel.

介绍了煤巷掘进工作面局部通风管理方法及管理经验。

By taking subinclined shaft construction in Gedian Coal Mine as an example,this paper introduces the pre-injection project and construction of the driving face with strong water-bearing bed .

通过葛店矿暗斜井工程施工实例，介绍了强含水层掘进工作面预注浆工程与施工情况。注浆后工作面涌水量满足了掘进技术要求，在经济、安全、施工速度等方面都显示出较大的优越性，具有推广的价值

When I first started driving a cab, Park Avenue was mostly a bunch of coal yards.

刚开始开出租的时候，有钱人待的派克大街几乎全是一片煤场，胡弗啤酒厂正靠近现在的沃尔多夫。

When I first started driving a cab, Park Avenue was mostly a bunch of coal yards.

刚开始开出租的时候，有钱人呆的派克大街几乎全是一片煤场，胡弗啤酒厂正靠近现在的沃尔多夫。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"