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.
研究顶板-煤体-底板所构成的组合煤岩体试样变形破裂规律及冲击倾向性对于预测冲击矿压具有非常重要的实践意义。
It is necessary to research into the burst failure and rock burst tendency of combined sample which is made up of roof, coal and floor.
滇东晚二叠世含煤岩系良好的岩性组合，贮藏了丰富的煤层气资源。
The excellent rock assemblage of Late Permian coal -bearing rock series in East Yunnan contains abundant seam gas resources.
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