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煤矿事故中,顶板事故占总事故的绝大多数,其中顶板大面积冒落时在工作面和巷道中所引起的空气冲击波加大了冒顶事故的危害。根据流体力学理论对坚硬顶板大面积冒落所造成的巷道局部风速、风力进行了理论推导和实例计算,结果表明,冒顶时巷道内单位面积承受的压力较大,放顶时应充分预测巷道内风力可能造成的危害,以减少事故伤亡。
Coal mine accidents, roof accidents accounted for the vast majority of the total accidents, including roof collapse in the face and roadway caused by the air shock waves increased the risk of roof accidents. According to the theory of fluid mechanics, the local wind speed and wind force caused by the large area of hard roof falling off are theoretically deduced and the examples are calculated. The results show that the unit area of the roadway under roof pressure is large, Wind damage may be caused to reduce casualties.