一、课题的提出近年来,矿井控制中心及集中控制站虽已高度自动化,井下电话网也已由人工操作改进为直接拨号,但仍然没有根本解决通讯上出现的困难。这是由于传统使用的传声通讯装置的电话已不能适应。目前要与井下负责正常生产和安全运行的人员保持密切的联系,变得愈来愈困难和复杂。因作业点距离 I. Project Proposition In recent years, the mine control center and centralized control station have been highly automated. The underground telephone network has also been improved from manual operation to direct dialing. However, there are still no fundamental solutions to the difficulties in communications. This is due to the traditional use of voice communications device phone has been unable to adapt. At present, it is more and more difficult and complicated to maintain close contact with those responsible for normal production and safe operation in the mine. Due to the operating point distance