This article gives a detailed analysis of the characteristics of conventional surface mining equipment and techniques as well as problems arising from mining in coal seams with difficult conditions.
针对露天煤矿复杂煤层的地质条件，全面分析了传统的露天采矿设备、工艺形式的特点和在复杂煤层开采中存在的问题。
Relationship between the surface hydrophobicity contact angle and proximate, ultimate analysis of coal was studied by using relative atomicity concept.
笔者引用相对原子数概念 ，对表征煤表面疏水性的接触角与煤的工业分析、元素分析结果之间的关系进行了分析探讨。
Taking the dump of No. 2 surface coal mine in Shenglidong mining area in Inner Mongolia as a case. The research method is the combination of on-site investigation and data analysis.
以内蒙古胜利东二号露天矿排土场为例，通过实地调研与资料分析，对矿区采取的复垦技术进行了分析和总结。
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