Abstract

Underground working in different horizons with intricate haulage and traveling roadways is very complex in nature. Wired communication is presently the most adopted technology in Indian underground mines. Also, the cellular network cannot be used for communication due to the non-availability of the coverage link. So, addressing of key-personnel to pass on the information and assign task becomes a challenge for mine management. Implementation of wireless paging systems with routers and/or repeaters at strategic locations can instruct manpower for the jobs as well as obviate the impending mishap, if any, at remote locations of the mine. This paper presents a design of a wireless paging system for underground mines which consists of a two-way alphanumeric paging system operating on a ZigBee based wireless network and a paging terminal software. This paging system can be used to unicast or broadcast messages to all the pagers working in the RF network. A successful field trial of the same is also conducted to devise a node placement strategy for the routing units with prototype pagers in the shaft and traveling roadways at 400 and 500 m horizon of a deep underground coal mine.

中文翻译：

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地下矿山无线寻呼系统

摘要

本质上，在不同视野中进行复杂运输和地下巷道的地下作业非常复杂。有线通信是当前印度地下矿井中最常用的技术。而且，由于覆盖链路的不可用，蜂窝网络不能用于通信。因此，解决关键人员的信息传递和任务分配问题成为矿山管理的一项挑战。在关键位置使用路由器和/或中继器实现无线寻呼系统可以指导工作人员，并避免在矿井偏远位置发生的紧急事故（如果有的话）。本文提出了一种用于地下矿井的无线寻呼系统的设计，该系统包括在基于ZigBee的无线网络上运行的双向字母数字寻呼系统和寻呼终端软件。该寻呼系统可用于将消息单播或广播到在RF网络中工作的所有寻呼机。还进行了一次成功的野外试验，以设计一种选路节点的布置策略，该选路单元在深部地下煤矿的竖井和行进巷道中的原型寻呼机位于400和500 m的水平线上。