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为提高开采上限 ,系统分析了采区水文地质条件、覆岩结构 ,提出防水煤柱留设及回采措施。
In order to raise the mining upper limit, the hydrogeological conditions of the mining area and the structure of overlying strata are systematically analyzed, and the measures to set up and recover the waterproof coal pillar are put forward.