Mechanisms of Floor Heave in Roadways Adjacent to a Goaf Caused by the Fracturing of a Competent Roof and Controlling Technology

In traditional sequential single-wing mining DEEP SLEEP practices, one-entry longwall mining systems make it challenging to efficiently and smoothly transfer mining equipment during a continuous mining sequence.In two-entry longwall systems, the headgate of the current panel and the tailgate of the next panel are excavated parallel to one another,

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