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| Determination of floor damage depth range in deep mine |
| Lv Yunlong |
| Yuzhou Mining Company of Kailuan Group, Zhangjiakou 075700, China |
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Abstract According to the situation of floor failure in the west wing face of No.1 coal in the first mining area, based on the mine geological conditions, the floor failure law under the action of floor supporting pressure was analyzed, the floor maximum depth expression was established, and the floor maximum failure depth was determined as 30.68m. Through on-the-spot verification by underground down-hole water pressure test method, the actual floor maximum failure depth of 31.7 m was determined. The relevant conclusions provided guidance for the surrounding rock control of the floor of the working face.
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