模拟分析初始场强对坑透反演结果的影响

发布时间：2018-05-30 12:11

本文选题：坑透 + 初始场强　；参考：《地球物理学进展》2016年06期

【摘要】：坑透技术是用于煤矿工作面内构造探查的一种快速有效方法.在实际数据采集时,由于发射天线面积、供电电源电压及周围环境中低阻物体的影响,导致发射场强各点相异,然而在反演过程中所采用的却是固定初始场强.为了详细研究迭代初始场强如何影响迭代反演结果,本文首先建立了含不同构造形态的工作面模型,并利用有限差分算法进行正演计算,然后给定不同初始场强,使用代数迭代反演算法(ART)得到工作面内异常分布图,最后分析了初始场强对反演结果的影响规律.研究显示:当反演初始场强较实际场强大时,则反演结果中出现假异常;当反演初始场强较实际场强小时,反演结果又会漏掉一些构造.通过南屯矿3602工作面坑透处理结果与实际揭露对比,验证了模拟分析结论.该研究成果表明了准确估算反演初始场强十分重要,并为下一步寻求解决方案提供理论基础.
[Abstract]:Pit penetration technique is a fast and effective method for the exploration of coal face structure. In the actual data acquisition, due to the effect of the area of the transmitting antenna, the voltage of the power supply and the low resistance object in the surrounding environment, the intensity of the transmitting site is different, but the initial field intensity is fixed in the inversion process. In order to study in detail how the initial field intensity affects the iterative inversion results, a working face model with different structural forms is established in this paper, and the forward calculation is carried out by using the finite difference algorithm, and then the different initial field intensities are given. An algebraic iterative inversion algorithm (ART) is used to obtain the anomaly distribution map in the working face. Finally, the influence of the initial field strength on the inversion results is analyzed. The results show that when the initial field intensity is stronger than the actual field, there are false anomalies in the inversion results, and some structures will be missed when the inversion initial field intensity is smaller than the actual field strength. The results of pit penetration treatment in No. 3602 face of Nantun Coal Mine are compared with actual exposure, and the conclusion of simulation analysis is verified. The research results show that it is very important to estimate the initial field strength accurately and provide a theoretical basis for finding a solution for the next step.
【作者单位】：中国矿业大学资源与地球科学学院;
【分类号】：P631.3

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