However, the resource-bearing regions distribute uneven. The conditions of complex coal mining technology and biological environments limit the coal resource development of energy bases.

但是，我国煤炭资源地域分布不均衡，复杂的煤矿开采技术条件和生态环境制约着我国能源基地煤炭资源的开发。

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The authors hold that the geological conditions, mining technology and equipment as well as the demand of the national economy for coal are the main factors for determining the size of a mine.

作者认为煤层开采条件、采矿技术装备和国民经济对煤炭的需要是确定井型的主要因素。

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The co-extraction technology of coal and CMM under the complicated and difficult geological conditions in Huainan Coal Mining Area is presented.

根据淮南矿区实际，提出并研究了复杂特困条件下煤与煤层气共采技术。

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