Coal Mine Emergency Converged Dispatch Communication System Solution

1. System Overview

Coal mine safety production and emergency rescue operations place extremely high demands on the reliability, real-time performance and convergence capability of communication systems. Traditional coal mine communication construction is usually planned independently by business: the production wired telephone, emergency broadcast, wireless communication and alarm linkage systems each operate in isolation, resulting in prominent information silos. In the event of a sudden accident, it is difficult to achieve unified command and coordinated dispatch.

By building an Emergency Converged Dispatch Communication System, the production wired telephone dispatch system, emergency broadcast system, 5G wireless communication system and coal mine alarm system can be converged and linked together, enabling voice, video, SMS and conference services among the access terminals of each communication system, forming a "one network, one platform, one dispatch" coal mine emergency communication system that comprehensively enhances the mine's emergency response and command dispatch capability.

2. System Composition

The system takes the emergency converged dispatch platform as its core and converges multiple existing communication subsystems at the lower layer. Each subsystem maintains independent operation while achieving business collaboration at the unified dispatch layer:

• Production Wired Telephone Dispatch System: Based on mine digital program-controlled dispatch switching equipment, it covers telephone terminals at every production link both underground and on the surface, providing dispatch services such as emergency call, barge-in, forced release, monitor, call pickup, conference call and recording. It serves as the basic voice channel for daily production dispatch and emergency command.
• Emergency Broadcast System: Covers broadcast terminals in the pithead, pit-bottom yard, main haulage roadways, mining faces and other areas, supporting zone broadcast, whole-mine broadcast, intercom paging and emergency alarm announcement for accident warning, evacuation command and information release.
• 5G Wireless Communication System: Based on underground 5G private network base stations and wireless terminals, it provides high-bandwidth, low-latency mobile communication supporting voice calls, HD video return, data collection and positioning services, compensating for the coverage limitations of fixed telephones in mobile scenarios.
• Coal Mine Alarm System: Connects safety monitoring alarm information such as gas, carbon monoxide, temperature, water level and feeder status. When an alarm is triggered, the platform automatically activates audible/visual alarms, broadcast notifications and dispatch console pop-ups, achieving a closed loop of hazard early warning and emergency response.

3. Multi-system Convergence and Linkage

The emergency converged dispatch platform connects the above subsystems through protocol adaptation and signaling interworking:

• Unified Directory and Unified Numbering Plan: The terminals of all subsystems are incorporated into a unified numbering and directory system, allowing dispatchers to call any type of terminal from a single dispatch console without memorizing multiple dialing rules.
• Business Linkage: When the coal mine alarm system detects an abnormality and the alarm is confirmed, the platform can automatically link the emergency broadcast system to issue evacuation commands, link the 5G wireless system to push SMS and notifications to relevant personnel terminals, and simultaneously call the duty telephones in the production telephone dispatch system, achieving one-click linkage and multi-party collaboration.
• Cross-system Calling and Transfer: Call transfer, call pickup and multi-party conference can be realized among production telephones, 5G wireless terminals and broadcast terminals, breaking system boundaries and ensuring that personnel on any network can be quickly located and reached.

4. Core Business Functions

• Voice Services: Unified addressed calling, emergency call, barge-in, forced release, monitor, call pickup, recording and other dispatch voice functions among all system terminals; the entire calling process is manageable and traceable.
• Video Services: Converges video sources such as 5G wireless terminals and fixed video surveillance, supporting on-site video return, video viewing on the dispatch console and multi-party video conference, enabling commanders to direct underground operations with full visibility.
• SMS Services: The platform pushes early-warning SMS, dispatch commands and notification messages to wireless terminals and managers' mobile phones, providing a guaranteed communication fallback of "SMS delivery even if calls fail".
• Conference Services: Supports multi-party teleconference and audio/video conference, enabling the duty dispatchers, mine leaders, rescue teams and expert groups to conduct emergency consultation at any time for rapid disaster assessment and rescue deployment.

5. System Features

• Multi-network Convergence, Unified Dispatch: Integrates fixed-line telephony, broadcast, 5G and alarm systems into a unified platform, eliminating information silos so that the full emergency communication organization can be completed on one platform.
• High-reliability Design: The core platform supports dual-machine hot standby and redundant networking; key links have primary/backup protection; underground equipment meets mine explosion-proof and protection requirements, ensuring uninterrupted communication under extreme conditions.
• Rapid Emergency Response: One-click linkage, automatic alarms, broadcast evacuation and SMS fallback mechanisms shorten emergency response time and enhance the mine's capability to handle sudden incidents.
• Open and Scalable: The platform is designed with standard protocols and open interfaces, allowing smooth integration of future communication subsystems and business applications while protecting existing investment.
• Easy Operation: The dispatch console has a simple interface with graphical presentation of the status of each system, low training cost, and quick onboarding for duty personnel.

6. Application Scenarios

• Daily Production Dispatch: Unified dispatch of underground and surface production telephones and wireless terminals for rapid task assignment and coordination.
• Accident Emergency Rescue: Alarm-triggered linkage of broadcast evacuation, SMS notification and multi-party conference; the command center organizes rescue operations in a unified manner and monitors the underground situation in real time.
• Maintenance and Inspection Operations: Maintenance personnel maintain voice and video contact with the dispatch center through 5G wireless terminals, making the operation process visible and controllable to ensure personnel safety.
• Emergency Drills: The system is used to organize whole-mine emergency drills with full recording of the process for post-drill review and evaluation, continuously improving the emergency plan.

7. Conclusion

The Coal Mine Emergency Converged Dispatch Communication System uses the converged dispatch platform as the hub to deeply integrate the production wired telephone dispatch system, emergency broadcast system, 5G wireless communication system and coal mine alarm system, achieving cross-system collaboration of voice, video, SMS and conference services. It establishes an integrated communication guarantee system of "production dispatch in peacetime, emergency command in wartime", and is an important infrastructure for improving coal mine safety production levels and emergency rescue capabilities.