【摘要】 针对陷落柱与周围煤体之间存在明显波阻抗差异的特点,建立巷道内地震波超前探测陷落柱数值模型。采用波场正演模拟方法,分析巷道前方存在陷落柱时的地震波场特征,总结出基于绕射偏移的陷落柱边界探测方法。在新元矿南二正巷实际超前探测中,该方法准确圈定了巷道前方陷落柱的范围。探测结果和实际揭露情况对比表明:地震波超前探测技术可以对巷道前方120m范围内的陷落柱构造进行有效预测。更多还原

【Abstract】 In allusion to the obvious wave impedance difference existed between subsided column and peripheral coal mass,the numerical model of subsided column roadway seismic wave advanced prospecting has been modeled.The analysis using wave field forward simulation has found roadway front subsidence seismic wave field features existed,and then a subsided column boundary detection method based on diffracted migration summed up.During the advanced prospecting in the S2 main roadway of the Xinyuan coalmine,using of the method has cycled out subsided column extent ahead of roadway with accuracy.The contrast of prospecting and practical revealed results demonstrated that: the seismic wave advanced prospecting technology can effectively predict roadway front subsided column within 120m extent.更多还原