煤矿井下的通讯系统是组织、指挥生产和保证安全的重要设备之一。随着矿井和采区的高度集中,采煤机械化程度和采煤工作面单产的大幅度提高,更需要研制新型的通讯系统,以适应现代化生产、高产、高速、高效等特点的需要。 近来,美国煤矿科技界十分注意通讯设备的更新换代。对旧有的扩音电话,载波电话等系统进行了不断地改进。目前正在研 The communication system in a coal mine is one of the important equipment for organizing and directing the production and ensuring safety. With the high concentration of mines and mining areas, the degree of mechanization of coal mining and the significant increase in the yield per unit area of ​​coal mining face, a new type of communication system needs to be developed to meet the needs of modern production, high output, high speed and high efficiency. Recently, the U.S. coal mining science and technology paid great attention to the upgrading of communications equipment. On the old public address phone, carrier phone system has been continuously improved. Currently researching