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以２２０１采面为实例，介绍了在直接顶破碎、厚度小，而老项坚硬完整条件下的采面初放期间，通过“浅槽裂顶、煤垛缓顶”结合法新工艺，能将采空区悬项安全放下。
Taking the 2201 face as an example, this paper introduces the new method of combining the new technique with the method of “shallow groove crack roof and coal bunker gentle roof” during the initial setting of the mining face under the condition of direct roof crushing and small thickness, Goaf hangs down safely.