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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.
Pit technology is a fast and effective method used to probe the tectonics in the coal mine face.In the actual data acquisition, due to the influence of the transmitting antenna area, the power supply voltage and the low resistance object in the surrounding environment, However, the initial initial field strength is used in the inversion process.In order to study in detail how the initial field strength of the iteration affects the iterative inversion results, a facet model with different tectonic forms was established and the finite difference method And then given different initial field strength, using the algebraic iterative inversion algorithm (ART) to get the anomaly distribution in the working face, finally analyzed the influence law of the initial field strength on the inversion results.Research shows that when the inversion When the initial field strength is larger than the actual field strength, the fake anomalies appear in the inversion results. When the initial field strength of the inversion is smaller than the actual field strength, the inversion results will omit some structures. The results verify the conclusion of the simulation analysis, which shows that it is very important to accurately estimate the initial field strength of the inversion and provide a theoretical basis for seeking solutions in the next step.