It has been 1500 years old to mine coal in Datong area. Mining coal has caused irreparable damage to water environment.
大同地区煤炭开采有1500年的历史，因为煤炭开采，现已造成对水环境无法修复的破坏。
Through analysis of geological data of Anfu old mining area, the author has indicated the way of Coal prospecting.
通过对安福老矿区的地质资料分析，指出老矿区找煤方向。
The secondary mixed gas is not only one kind of noticeable catastrophe gas, but also is the unique and useful pure energy in old mining area of coal basin.
次生混合气既是一种不可忽视的灾害性气体，也是煤盆地老矿区特有的、可供开发利用的洁净能源。
The secondary mixed gas is not only one kind of noticeable catastrophe gas, but also is the unique and useful pure energy in old mining area of coal basin.
次生混合气既是一种不可忽视的灾害性气体，也是煤盆地老矿区特有的、可供开发利用的洁净能源。
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