美国威斯汀豪斯电气公司已为美国矿务局研究出一种煤矿通讯定位和救护系统。全部系统设计包括呼吸装置,一个活动避护所,一个大的固定避护所,一个通讯定位系统和一个救护系统。这种通讯定位和救护系统已于71年1月在模拟的事故状况下进行试验。通讯系统采用的是地震和电磁两种技术,其地面上的地震设备可以“听到”出事的单个矿工撞击井壁、 The Westin House Electrical Company in the United States has developed a coal mine communications positioning and rescue system for the U.S. Bureau of Mines. The complete system design includes breathing apparatus, an activity shelter, a large fixed shelter, a communication positioning system and an ambulance system. The communication positioning and rescue system was tested in January of the same year in a simulated accident situation. The communications system uses both seismic and electromagnetic technologies, and ground-based seismic equipment can “hear” an accident by a single miners hitting the wellbore wall,