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结合某矿1026孤岛工作面底板条件,采用瑞利波探测方法对孤岛工作面风巷底板进行探测。沿1026工作面风巷进行布置测线,从工作面煤壁前方5 m开始每隔5 m布置1个测点,测线总长60 m,共布置12个测点,探测方向为垂直于巷道底板向下。通过瑞利波探测剖面处理得出:巷道在超前支承压力范围内煤层底板的最大破坏深度为26.3 m,而孤岛工作面部分地段隔水层厚度只有30 m,因此在超前支承压力范围内其突水的可能性大大增加。
Combined with the condition of floor of 1026 island working face in a mine, Rayleigh wave detection method was used to detect the wind tunnel floor of island work face. 1026 face along the wind lane layout line measurement, 5 m from the front of the coal wall in front of every 5 m to arrange a measuring point, measuring line length 60 m, a total of 12 measuring points arranged in the detection direction perpendicular to the roadway floor down. The results of Rayleigh wave profile detection show that the maximum failure depth of coal seam floor is 26.3 m in the advance support pressure range and the thickness of aquitard is only 30 m in part of the island face, The possibility of water is greatly increased.