The average coal seam here is three feet thick.
这里的煤层平均为3英尺厚。
They were giant, sometimes 8 feet long , and many of them lived in the swampy pools in which our coal seam, or layer, or formed.
它们体型巨大，有时有8英尺长，其中许多生活在沼泽地里，我们的煤层就是在这里形成的。
The permeability of coal seam is the crucial problem.
煤层气储层的渗透性是煤层气开发的关键。
The influence of aquifer upon the mining coal seam is estimated.
预测了侏罗系含水层对煤层开采的影响。
The spontaneous combustion of coal seam endangers the safe production.
井下煤层自燃严重危害着安全生产。
Factors affected coal seam permeability change and its law is analyzed.
分析了煤层透气性变化的影响因素及变化规律。
Rockburst is catastrophic failure phenomena of rock mass and coal seam.
冲击地压是一种煤岩体的突然破坏现象。
The gas distributed rule of coal seam is the base of preventing gas hazard.
煤层瓦斯赋存规律研究是瓦斯灾害防治的基础。
Coal seam faults refer to those parallel to or intersected with seam at small angles.
顺煤断层是指断面沿煤层或与煤层呈小角度相交的断层。
The phenomenon of water vaporization during infusing water into coal seam was studied.
对煤层注水的水分蒸发现象进行了研究；
This paper goes further into the blast-winning technology of the composite coal seam face.
深入探讨了复合煤层回采工作面“松动放炮”落煤的工艺问题。
Exploration evaluation coal seam gas is a base of coal seam gas exploration and developing.
煤层气的勘探评价，是开展煤层气勘探与开发工作的基础。
The gauge can simultaneously measure quantity and pressure of water infused into coal seam.
该水表能同时测定注入煤层中的水量和注水压力。
The mathematical model of complex coal seam is established by mathematical statistics method.
利用数理统计的方法建立复杂煤层的数学模型。
The spontaneous combustion of coal seam is one of the major problems in safe production of coal mine.
煤层自燃问题一直困扰着我国煤矿的安全生产。
The study on coal lithostructures is of great significance for predicting the permeability of coal seam.
煤岩结构的研究在预测煤层的渗透性方面有重要意义。
Research on coal bedding structure is the theory foundation and precondition of coal seam gas exploitation.
煤体层理结构的研究是煤层气开发开采的理论基础和前提条件。
When the protective coal seam is mined, the gas management on the protected coal seam is a very important job.
保护层开采时，对被保护层的瓦斯治理是一项非常重要的工作。
The concrete construction methods and effects of mining technology in the middle thick coal seam are introduced.
介绍了中厚煤层回采工艺的具体施工方法和效果，同时介绍了工作面支护参数的计算。
Due to the coal seam particularity in Shendong Coal Mine, cracks appear at the radial seat of Eickoff SL500 shearer.
由于神东矿区煤层的特殊性，在使用艾柯夫公司SL500型采煤机时，摇臂座出现了裂缝。
So it is feasible used the logging data to forecast coal seam gas content, and the applied value is enhance further.
证明用测井资料预测煤层瓦斯含量是可行的，从而进一步加强了测井资料的实际应用价值。
The way and principle of Gaussian curvature method for forecasting natural fracture zones in coal seam are discussed.
论述了高斯曲率法预测煤层天然裂隙发育区的基本原理和方法。
Essential way of solving the gas drainage problem of low permeability coal seam is to increase coal seam permeability.
解决低透气性煤层瓦斯抽放问题的根本途径是增加煤层的透气性。
The organization of construction and application result of metal net support in thick coal seam mining are introduced.
介绍了厚煤层回采巷道中锚网(索)支护的施工组织及应用效果分析。
Grave protrusion coal seam tunnelling hydraulic cutting protrusion-dispelling measures is a new technology in the world.
严重突出煤层掘进水力掏槽防突措施在国际上是一种防突新技术。
The structure and work theory of a new type of hydraulic lock of the thinnest coal seam shearer is described in this paper.
介绍了一种新研制的极薄煤层采煤机液压锁的结构特点及工作原理，并对其进行了性能实验。
The unit forecast method is applied to forecast quantitatively the complicated degree of small structure in main coal seam.
用单元预测法对研究区主采煤层小构造的复杂程度进行了定量预测。
From Hales method, reversed refracted wave method shows accuracy and efficiency in detecting the thickness of remained coal seam.
以哈尔·斯法为例，将相遇折射波法用于剩余煤厚探测中，具有精确、高效、快速的特点。
The structural deformation is the principal geological factor that affects the thickness variation of coal seam on a mine field scale.
构造作用是控制井田范围内煤层厚度变化的主要地质因素。
The structural deformation is the principal geological factor that affects the thickness variation of coal seam on a mine field scale.
构造作用是控制井田范围内煤层厚度变化的主要地质因素。
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