电场激励法超前探测原理及仪器发射部分研制

摘要

为了丰富和提高煤矿巷道电法超前探测的手段和效率，利用煤岩激发极化和电场同性相斥的基本性质，分析在双频激电电流作用下的约束电场的百分频率效应，得出前方围岩特性来间接判断地质异常。所研制的超前探测仪发射部分采用整流隔离稳压和模块化设计，示波器得到的发射电流波形为双频波，强度可方便调节，达到了设计要求。%In order to enrich detection means and improve the efficiency of electrical method in advanced de -tection.We can obtain the characteristics of front -surrounding rock and to indirectly determine the geolog-ical anomaly by analyzing the percent frequency effect of dual -frequency induced polarization current limiting electric field based on the basic properties of excitation polarization and isotropic electric field repel in rock . The advance detection instrument ’ s emission part adopts isolation rectification regulator and modular design . The transmitted current waveform is obtained by the oscilloscope .The current intensity can be easily adjusted without pole .The design requirements are reached .