The forming law of sinking column in Huabei type coal field, especially at the Fengfeng coal mine is analyzed and the mechanism of groundwater innercycle in sinking columns is put forth.
分析了华北型煤田,特别是峰峰矿区陷落柱的发育规律,提出了陷落柱的地下水内部循环形成机理。
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You are all working on the completion of a cycle of lives that has been dominated by an inner struggle between light and dark, between self-awareness and the illusions of power, fear and ignorance.