Brief Analysis of Functional Requirements for Underground Broadcast Communication Systems in Coal Mines

To better ensure safety in coal mine production, it is essential for coal mines to strengthen the implementation of broadcast communication systems. This effectively reduces the likelihood of safety accidents and enhances rescue capabilities in the event of such incidents, thereby minimizing their impact.

The implementation and application of mine broadcast communication systems can significantly aid coal mining enterprises in implementing scientific work management and safety monitoring, improving emergency response and rescue capabilities, and ensuring the effective implementation of safety production.

An underground broadcast communication system is one of the essential systems for coal mine production safety. For the system to truly function effectively, it must meet industry standards and fulfill functional requirements, which are also stringent requirements for coal mine safety management.

In summary, the functional requirements that an underground broadcast communication system in a coal mine must meet include the following points:

1. Compliance with Industry Standards: The system and its constituent equipment must comply with industry-specified standards, including MT209, MT/T1004, GB3836.1, etc., and obtain coal mine safety certification (coal safety certification) in accordance with these standards. The hardware must possess explosion-proof qualifications.

2. Safety, Reliability, and Long-Term Stability of System and Equipment Performance: In underground and other flammable and explosive environments, intrinsically safe equipment should be selected. The equipment circuitry should be of an intrinsically safe type, and the input/output signals between devices should preferably be intrinsically safe signals.

3. 24-Hour Continuous and Stable Operation: The system must be capable of operating continuously and stably for 24 hours.

4. System Composition: The system should include a broadcast host, uninterruptible power supply, underground broadcast substations, explosion-proof and intrinsically safe power boxes, system broadcast software, etc.

5. Underground Broadcast Substations: Substations are used to play music, announcements, and other audio files. They receive voice signals from the broadcast center and play them clearly in real-time. Substations should enable voice intercom communication with the broadcast host and other substations within the region.

6. Broadcast Host: The host is used to monitor and control the underground broadcast communication system, send voice broadcast signals or instructions to broadcast substations and speakers, and engage in intercom communication with substations and speakers.

7. System Functions:

   - Broadcast Function: The system should have the capability to broadcast and play to underground broadcast substations and speakers; directional and zonal broadcasting, with pre-set broadcast content and automatic playback functions.

   - Emergency Rescue Command Function: Emergency broadcasts should have the highest priority, capable of forcibly cutting off all other broadcasts to play emergency content. It should also record, store, and replay broadcast voices from emergency calls and commands.

   - Communication Function: Underground broadcast substations and speakers should have intercom communication capabilities with the ground broadcast host. They should also have a one-touch call function to the broadcast center and enable intercom communication among broadcast substations within a local or selected area.

8. Management Functions:

   - Self-Diagnosis and Real-Time Fault Indication: The system should have the capability for self-diagnosis and real-time fault indication.

   - Graphical Display of Equipment Position and Status: The broadcast system software should have a graphical display function showing the positions and statuses of broadcast substations, speakers, and other equipment for easy management.

   - Isolated Fault Impact: A fault in a single broadcast substation or speaker should not affect the normal operation of other devices.

   - Individual Substation Management: The system should preferably have management capabilities for individual underground broadcast substations.

In addition to meeting the above requirements, the underground broadcast communication system in coal mines must also fulfill technical specifications such as fault-free operation time, system capacity, signal transmission distance, volume intensity of broadcast substations/speakers, and backup power supply operation time.

Only when these requirements are met can the broadcast system be considered qualified. The Guonuo Xinke Underground Broadcast Communication System for Coal Mines is designed and manufactured in strict accordance with industry standards, with complete qualifications, ensuring safety, reliability, and long-term fault-free stable operation.