Development of multi-channel observation and inversion for IP electrical sounding method

In order to improve the exploration effect of deep non-ferrous mineral resources, multi-channel observation methods for induced polarization （IP） electrical sounding data and their inversion imaging technology are studied. First of all, four multi-channel observation methods are developed based on conventional IP electrical method, namely three-electrode and four-electrode arrays of unilateral and bilateral current transmitting. Then the maximum smoothness constrained inversion method of the least squares sense for IP electrical sounding data is proposed, and the inversion software is programmed. Finally, the simulation and inversion results of geo-electrical model for the proposed observation methods are analyzed. And the comparison results show that three-electrode array of bilateral current transmitting gives the best result, but the intensity in field work is larger than others; unilateral three-electrode and four-electrode arrays give the better results. Taking detection results and convenience of field exploration work into consideration, these two methods are more suitable for practical application; bilateral observation method of four-electrode array is not suitable for the detection of the steep ore bodies.

航空电磁探测设备隔振系统动力学研究

采用电磁探测技术进行深部勘测时需要收集微弱的低频信号,而隔振系统的动力学特性对信号采集至关重要。基于气压传动原理设计了一种双气室的气缸式空气弹簧隔振系统,对其刚度、频率等力学参数对隔振性能的影响进行理论分析,并基于热力学和流体力学理论建立了隔振系统的非线性动力学特性模型,并对不同横截面积的气缸隔振性能进行了分析,得到了系统在最佳隔振性能时的气缸相关参数。

可控源音频大地电磁测深法在金属矿中的应用探讨

可控源音频大地电磁测深法是极具优势的地球物理深部勘测方法,在金属矿查找中具有查找速度快、探测深度广、穿透性强、信号稳定、抗干扰等诸多特点。文章分析了可控音频大地电磁测探法的工作原理和优势,并以铁锌矿为例,探析了可控源音频大地电磁测深法在金属矿查找中的应用,以供参考。