现阶段，我国煤矿井下通信网络多为工业以太环网，而该通信网络只可应用于日常通信中，这是由于当工业环网的骨干网和通信设备遭到瓦斯、顶板以及机电等煤矿事故破坏后，网络基本瘫痪，无法使其快速恢复，从而导致地面救援中心不能及时获取事故区域信息。且现有的通信设备体积较大，不方便携带和移动，增大了救援难度，因此研究一种平战结合式矿用新型网络以及开发便携通信设备具有重要意义。

论文针对矿下平战结合式的应用需求，在通信网络方面，通过对比总线形、环形及网状形等传统拓扑结构后，选择平时与战时可相结合的树形网络作为骨干网，并且进一步研究了井下应用模型以及“截枝”方案，相比于传统的通信网络，本文采用的树形网络在功能性、可靠性以及扩展性方面均有提高。

在通信设备方面，开发了一款支持树形组网的技术装备，用于井上与井下信息交互。其硬件按照本质安全技术原理设计，满足矿用电气设备的防爆要求，且装备的硬件分单元进行设计，由核心处理单元、以太网传输接口单元、复位单元及供电单元等构成硬件系统。其中，核心处理单元采用“微控制器LPC1788+网络芯片BCM53101”方案，提高了硬件系统的集成度，减小了装备体积和功耗；供电单元采用双重保护电路和两级降压电路为各单元进行供电，提高了硬件系统可靠性；复位单元采用专用芯片使微控制器和网络芯片同时复位，提高了系统上电的稳定性。装备软件采用分层设计方法，系统层采用稳定性高和实时性强的嵌入式操作系统µC/OS-II，并在协议栈LwIP的基础上实现网络设备驱动，应用层实现了DHCP客户端、SNMP Agent、VLAN及LLDP功能。

完成开发的装备体积为162mm×121mm×33mm，对其进行功能、性能以及组网测试，测试结果表明，吞吐率为100%，帧丢失率为0%，时延小于15us，装备满负载功耗小于3W，存储转发速率为100%，光纤传输距离大于10km。装备应用层功能均能正常工作，并支持树形组网和网络拓扑发现，符合论文的预期指标。

At this stage, most of the underground communication network in coal mines in my country is an industrial Ethernet ring network, and this communication network can only be used in daily communications. This is because the backbone network and communication equipment of the industrial ring network suffer from coal mine accidents such as gas, roof, and electromechanical After the destruction, the network was basically paralyzed and unable to recover quickly, which caused the ground rescue center to be unable to obtain information about the accident area in time. In addition, the existing communication equipment is large in size and inconvenient to carry and move, which increases the difficulty of rescue. Therefore, it is of great significance to study a new type of mine-use network combined with peacetime and warfare and to develop portable communication equipment.

Aiming at the application requirements of combined peace and war in the mine, in terms of communication network, after comparing traditional topological structures such as bus, ring and mesh, the thesis adopts a tree network that can be combined in peacetime and wartime as the backbone network, and further study the downhole application model and the "pruning" scheme. Compared with the traditional communication network, the tree network used in this thesis has improved functionality, reliability and scalability.

In terms of communication equipment, a technical equipment supporting tree-shaped networking was developed for information interaction between uphole and downhole. The hardware is designed in accordance with the principle of intrinsic safety technology to meet the explosion-proof requirements of mining electrical equipment, and the hardware sub-units of the equipment are designed. The core processing unit, Ethernet transmission interface unit, reset unit and power supply unit constitute the overall hardware system. Among them, the core processing unit adopts the "microcontroller LPC1788 + network chip BCM53101" solution, which improves the integration of the hardware system and reduces the volume and power consumption of the equipment; the power supply unit uses a dual protection circuit and a two-stage step-down circuit to supply power to each unit to ensure the reliability of the hardware circuit; the reset unit uses a dedicated chip to reset the microcontroller and the network chip at the same time, which improves the stability of the system when it is powered on. The equipment software adopts a layered design method, and the system layer adopts the embedded operating system µC/OS-II with high stability and strong real-time performance, and realizes network device driver based on the protocol stack LwIP. The application layer implements the functions of DHCP client, SNMP Agent, VLAN and LLDP.

The finished equipment has a volume of 162mm×121mm×33mm. test its function, performance and networking, the test results show that the throughput rate is 100%, the frame loss rate is 0, the delay is less than 15us, and the power consumption of the equipment is less than full load. 3W, the storage and forwarding rate is 100%, and the optical fiber transmission distance is greater than 10km. The equipment application layer functions can work normally, and support tree networking and network topology discovery, which meets the expected indicators of the thesis.

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