Weakening top coal by using water pre-infusion is one effective method to solve this problem.

提高顶煤放出率是综放开采的一个重大课题，预注水弱化顶煤是解决这一问题的有效方法之一。

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Weakening top coal by using water pre-infusion is one effective method to solve this problem.

提高顶煤放出率是综放开采的一个重大课题，预注水弱化顶煤是解决这一问题的有效方法之一。

youdao