井下无线电通讯不仅对于日常生产中的一般联络,而且对于发生事故时井下各地点的联络及情报收集、避难指示等都起着极其重要的作用。目前日本井下采用的无线电通讯方式,一般都是频率为180～250千赫的感应无线电方式。随着井下开采向边远和深部发展,通讯范围不断扩大,使用这种方式通讯将会产生音质和噪声比降低、跳动、杂音等问题。同时,这种方式不能与井下携带式 Underground radiocommunication plays an extremely important role not only in the general contact in daily production, but also in liaison and collection of information and instructions for sheltering downhole when accidents occur. At present, the underground radios used in Japan are generally induction radios with a frequency of 180 to 250 kHz. With the underground mining to the remote and deep development, the scope of communication has been expanding, using this method of communication will have to reduce the sound quality and noise ratio, beating, noise and other issues. At the same time, this method can not be carried downhole