煤层自燃电导成像动态监测技术的应用研究

STUDY AND APPLICATION OF CONDUCTIVITY IMAGING METHOD FOR DYNAMIC MONITORING OF SPONTANEOUS COMBUSTION OF COAL SEAM

为寻求快速而有效的矿田煤层自燃三维动态监测方法，选择宁夏汝淇沟矿田进行高分辨率电导成像系统的研究与应用．在传统的张量阻抗分析基础上，提出适于煤层自燃条件的电导率计算公式，有效地显示了煤层自燃的热传导空间图像和煤层自燃过程中导电和介电性的空间分布规律．据此建立了火区的监测模型，为煤层自燃的三维动态监测和灭火工程的实施提供了又一种有效的途径．

In search of a rapid and effective method for 3D dynamic monitoring of selfignition of coal seam, Ruqigou mine field of Ningxia was chosen for study and application of high resolution conductivity imaging system. Based on the traditional analysis of tensor impedance a conductivity calculation formula suitable for the conditions of spontaneous combustion of seam was proposed, which can show effectively the spatial images of thermal conduction and distribution of conductive and dielectric space in the process of spontaneous combustion. Based on which, a model for monitoring the fire area was set up. It provides an effective approach for 3D dynamic monitoring of spontaneous combustion of coal seam and also for firefighting.