煤层厚度，coal-seam thickness，是指煤层顶板与煤层底板之间的垂直距离。
组合煤岩试样中煤层厚度越大，则其弹性能指数就越大。
Meanwhile the thicker the coal in the combined sample is, the greater the elastic energy index is.
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.
影响煤层气产量的主要因素是煤层渗透率、煤层厚度及含气量。
The main factors of influencing coal-bed gas production are permeability, thickness, and gas-bearing volume of the coal-bed.
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