地巷联合瞬变电磁法可行性研究
发布时间：2018-09-19 13:19
【摘要】：地巷联合瞬变电磁法采用地面回线源发射、煤矿井下巷道中接收的工作方式,对提高分辨率具有理论优势。为论证该方法在煤矿巷道中实际应用的可行性,从理论计算和现场试验两方面对感应二次场的信号特征、有效长度、异常响应进行研究。理论计算表明,井下信号曲线为低高低的特征,早期信号相对弱但晚期信号强于地面。现场试验证明,虽然电磁干扰源较多,但仍采集到长度超过20 ms的光滑信号,且曲线特征与理论结果一致。实测测道曲线上隆起的异常段与已知积水采空区位置基本一致,证明地巷联合瞬变电磁法具有实际应用的可行性。
[Abstract]:The ground roadway combined with transient electromagnetic method uses the ground return line source to emit and the working mode to receive in the underground roadway of coal mine, which has the theoretical advantage to improve the resolution. In order to prove the feasibility of the practical application of this method in coal mine roadway, the signal characteristics, effective length and abnormal response of the induction secondary field are studied from two aspects of theoretical calculation and field test. The theoretical calculation shows that the downhole signal curve is low and the early signal is weak but the late signal is stronger than the ground signal. The field tests show that although there are many electromagnetic interference sources, the smooth signals over 20 ms in length are still collected, and the characteristics of the curves are in agreement with the theoretical results. The abnormal section of the uplift on the measured track curve is basically consistent with the position of the known goaf, which proves that the combined transient electromagnetic method of roadway is feasible in practical application.
【作者单位】： 中国地质大学(武汉)地球物理与空间信息学院;中煤科工集团西安研究院有限公司;
【分类号】：TD82;P631.325
[Abstract]:The ground roadway combined with transient electromagnetic method uses the ground return line source to emit and the working mode to receive in the underground roadway of coal mine, which has the theoretical advantage to improve the resolution. In order to prove the feasibility of the practical application of this method in coal mine roadway, the signal characteristics, effective length and abnormal response of the induction secondary field are studied from two aspects of theoretical calculation and field test. The theoretical calculation shows that the downhole signal curve is low and the early signal is weak but the late signal is stronger than the ground signal. The field tests show that although there are many electromagnetic interference sources, the smooth signals over 20 ms in length are still collected, and the characteristics of the curves are in agreement with the theoretical results. The abnormal section of the uplift on the measured track curve is basically consistent with the position of the known goaf, which proves that the combined transient electromagnetic method of roadway is feasible in practical application.
【作者单位】： 中国地质大学(武汉)地球物理与空间信息学院;中煤科工集团西安研究院有限公司;
【分类号】：TD82;P631.325
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