This shift is due to both improved safety standards and technology as well a move away from underground mines towards surface mining and controversial mountaintop-removal mining.

这种数据上的提高在于安全标准的提升和技术的进步，同时，地表开采和富有争议性的削山开采也使得地下开采也逐渐走到地上。

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Successful predicting and controlling technology for safety mining coal on the aquifer with high-pressure are provided.

为深部煤层高承压含水层上安全开采提供了一套较成功的预报和控制技术。

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The mining and technology play an all-important role in the safety production, exertion of the equipments ability, production cost, economic benefit, and so on.

煤矿开采方法及技术对煤矿的安全生产、生产设备能力的发挥、生产成本、经济效益等具有十分重要的作用。

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