| 1. | Coal seams intermixed with iron ore .
煤层和铁矿混杂在一起。
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| 2. | The thicker coal seams are located in a 10-15 km wide belt along which the channel meanders .
较厚的煤层位于河道发生弯曲的、宽10-15公里的地带内。
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| 3. | Mining high gas coal seam with enclosed mining method
封闭式采煤法开采高瓦斯煤层
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| 4. | Features of steep coal seam and its mining technology
急倾斜煤层的特点及采煤工艺
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| 5. | Construction technique of deep - drill of outburst coal seam
突出煤层深钻孔施工技术
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| 6. | The host characteristics of zhujiajie well field coal seam
朱家街井田煤层赋存特征
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| 7. | Mining area tunnel arrangement in high gas coal seams
高瓦斯煤层采区巷道布置
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| 8. | Talking about the influence of the joins in thick coal seam
节理发育对厚煤层的影响
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| 9. | Measurement study of tensile strength of coal seam
煤层抗张强度原位测试研究
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| 10. | Application of magnetized water in coal seam water infusion
磁化水在煤层注水中的应用
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