基于多参数优选及三维模拟的槽波精细探测研究(增刊)

近年来,地震槽波常用于探测煤层内的隐伏构造,但是适宜的激发参数对探测精度和效果有较大影响。以六家煤矿E1N4段6-7工作面运输顺槽为研究对象,通过多参数激发试验及接收效果试验优选区域最优采集参数,在此基础上建立了含断层的三维模型,开展三维正演模拟,检测优选参数的适宜性,并进行了实际应用。结果表明：3m孔深和300g的激发药量可获得较好的反射槽波；基于锚杆检波器接收是槽波数据接收的最优选择；正演模拟结果与模型断层位置吻合,证明了优选参数的适宜性；依据优选后的参数开展了探测实践,查明了2处断层异常存在,修正了早期断层信息,并发现了新的断层CF2,为后期安全生产提供了可靠地质保障,并为槽波探测提供了参数依据。

Research on in-seam wave detection based on multi-parameter optimization experiment and three-dimensional simulation

In recent years, in-seam wave technology was often used to detect hidden structures in coal seams. However, suitable excitation parameters have a great influence on the detection accuracy and effect. Taking the transportation along the 6-7 working face of the E1N4 section of Liujia coal mine as the research object, the optimal collection parameters of the area were selected through the multi-parameter excitation test and the reception effect test. Then, on this basis, a 3D model with faults was established, and 3D forward modeling was carried out to check the suitability of theoptimal parameters. Finally, the detection application was carried out on the 6-7 working face of E1N4 section. The results shown that: for a hole depth of 3m and an excitation dose of 300g in the study area, a better reflection trough wave could be obtained. The receiving method based on the anchor geophone was the best choice for receiving trough wave data. The forward modeling results were in good agreement with the model fault locations, which demonstrates the suitability of the optimal parameters. According to the optimized parameters, the detection practice was carried out, the existence of 2 faults was identified, the early fault information was corrected, and a new fault CF2 was discovered, which provided a reliable geological guarantee for safe production in the later stage, and provided a parameter basis for the through wave detection.