Mining Communication Systems

In mining operations, due to complex environments and numerous safety hazards, ensuring smooth communication is crucial for responding to emergencies, safeguarding personnel lives, and maintaining normal mine operations. The J&R Technology emergency telephone system solution aims to build an efficient, reliable, and flexible communication network that integrates various communication devices to achieve comprehensive emergency communication coverage throughout the mine.

Project Background

Requirements Analysis

Instant Communication Needs

Mining operations cover wide areas, requiring personnel in various zones to quickly contact the dispatch center in emergencies to report situations, while the dispatch center can promptly issue instructions.

Wired and Wireless Integration

Some underground areas are suitable for wired communication, while mobile workers need wireless support. The system must seamlessly integrate wired and wireless communications.

Explosion-Proof Safety Requirements

Given the presence of flammable and explosive gases in the mining environment, communication equipment must have explosion-proof features to ensure safe use in hazardous conditions.

Audio-Visual Alarm Needs

In emergencies, audio-visual alarms must quickly alert nearby personnel to enable timely response.

System Reliability Requirements

Mining operations run continuously; the emergency telephone system must be highly reliable to minimize downtime and ensure stable, uninterrupted communication.

Design basis

This solution strictly complies with current national standards and the actual requirements of mining projects on-site,
ensuring full-process regulatory compliance. The main references and standards include:

Regulations and Safety Standards

Production Safety Law: Defines enterprises’ responsibilities for emergency rescue systems and communication facility configurations.
Mine Safety Law and Implementing Regulations: Requires the setup of independent, disaster-resistant emergency communication systems to ensure communication during accidents.
Safety Code for Metal and Non-metal Mines (GB 16423-2020), Clause 6.6.3: Underground areas must be equipped with a two-way emergency communication system directly connected to the surface dispatch center.
Coal Mine Safety Regulations (2022 Edition), Clause 483: Requires underground emergency broadcast and communication systems capable of direct connection to the surface dispatch center during disasters.

National Standards

GB 3836.1-2021 General Requirements for Equipment in Explosive Atmospheres: Underground equipment must have explosion-proof certification (Ex mark), meeting Class I (coal mines) or Class II (non-coal mines) explosion-proof levels.
MT/T 1124-2011 Safety Technical Requirements for Mining Communication Cables: Underground cables must be flame retardant, with tensile strength ≥ 200 MPa and voltage resistance ≥ 1 kV.
GB/T 30094-2013 Industrial Communication Network – General Technical Requirements for Mining Communication Systems: Communication systems must have redundant designs and meet interference resistance indicators (EMC ≥ 20dB)./
GB 51024-2014 Design Specification for Intelligent Monitoring Systems in Coal Mine Safety Production: Emergency phones must seamlessly integrate with gas monitoring, personnel positioning, and other control systems.

Industry Standards

AQ 2033-2011 Construction Specifications for Coal Mine Underground Emergency Refuge Systems: Emergency communication devices should be installed in refuge chambers and key roadway nodes, supporting voice broadcast and alarms.

Technical Standards

IEC 62305-5 Protection against Lightning and Electromagnetic Pulses: Underground communication equipment must have lightning protection and surge resistance capabilities (e.g., equipped with SPD protectors).
IEEE 802.3 Ethernet Standard: Supports industrial ring networks (such as gigabit fiber redundant rings), with communication self-healing time ≤ 50 ms.

Solution Design and System Architecture

The J&R Technology solution builds a mining emergency telephone system through hierarchical device collaboration. The core layer consists of servers and dispatch software managing voice communications; the transmission layer uses switches to ensure data transport; and the access layer employs multiple devices to cover all scenarios. The system integrates wired and wireless communications to ensure rapid transmission of emergency information.

System features

Emergency Call Function

Support explosion-proof telephones, wireless intercoms, and other terminals to directly dial the dispatch console through preset numbers (such as "999").
The dispatch console uses special ringtones and prominent signage to ensure timely response.
Wireless walkie talkie supports one click alarm and automatic transmission of location information (location function required)

Two way communication function

Realize full duplex voice communication between the dispatch console and the terminal, supporting multi area collaborative communication.
Real time communication covering all scenarios such as underground work surfaces and office areas above the well

Broadcast function

Support zone broadcasting (work face/underground/above well), including emergency notifications and safety tips.
The sound and light alarm telephone can automatically switch to receive broadcasts and stop the current alarm state

Recording function

Automatic recording of all calls (dispatch console) ↔ Terminal, between terminals).
Recording file server storage, supports custom storage period.
Accident tracing: supports timeline retrieval and voice playback analysis

Video linkage function (optional)

Emergency call triggers monitoring screen to automatically pop up (requires pre-set camera association).
Support remote pan tilt control (rotation/zoom) to obtain panoramic information

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Mining Communication Systems

Project Background