新型煤矿巷道随掘超前探测方法研究

本文提出了新型煤矿巷道随掘超前探测方法，为实现巷道掘进和超前探测并行作业提供了可行思路。首先，提出随掘超前探测方案，将掘进机的截割头作为随掘场源，融合物探方法与掘进主体；然后，构建随掘超前探测理论模型并获取测点电位变化规律，与有限元计算结果比对，验证了测点电位数值计算方法的准确性与可行性；最后，确定随掘场源的分流规则，以正常地质体作为参照，对比研究随掘过程中低阻和高阻两类不同异常体的视电阻率演化规律，当场源越接近低阻含水带，视电阻率均值降幅从5.40%提高至29.80%,越接近高阻断层，视电阻率均值增幅从7.12%提高至35.53%,水箱模拟实验表明，所提煤矿巷道随掘超前探测方法可实时、连续探测掘进工作面前方地质状况。

Novel advanced detection method with excavation in coal mine roadway

This article proposes a novel advanced detection method with excavation in coal mine roadway, which provides a feasible idea for the parallel operation of roadway excavation and advance detection. First, the scheme of advance detection with excavation is proposed, which uses the cutting head of the roadheader as the field source with excavation to integrate the geophysical prospecting method with the main body of the roadheader. Then, the theoretical model of advance detection with excavation is formulated to obtain the change law of the potential of the measuring point and compare it with the finite element calculation results. The accuracy and feasibility of the numerical calculation method of the measured point potential are evaluated. Finally, the diversion rules of the field source are determined, and the normal geological body is taken as a reference. The evolution law of the apparent resistivity of two different types of abnormal bodies, low resistivity and high resistivity, are compared and studied. When the field source is close to the low resistance water-bearing zone, the reduction for the average value of apparent resistivity is from 5. 40% to 29. 80% . If it is close to the high resistance fault, the average value of apparent resistivity increases from 7. 12% to 35. 53% . The water tank simulation experiment is carried out, and the results show that the proposed advance detection method with excavation in coal mine roadway can detect the geological conditions in front of the excavation face in real time and continuously.