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通过对仰角钻孔抽放有效段的观测,总结出不同煤层采后裂隙带的高度,为以后同一煤层回采的顶板高抽巷、仰角钻孔高度确定提供可靠依据。
The elevation of post-mining fractured zone of different coal seams is summed up through the observation of the effective section of elevation drilling, which can provide a reliable basis for the future determination of the elevation of high elevation roadway and elevation elevation of the same coal seam.