I. Project Background

Underground coal mining operations face harsh environments and high risks. Traditional communication methods often fail to transmit information effectively during emergencies, leading to significant economic losses and safety hazards. China’s "13th Five-Year Plan" emphasizes the need for innovation in mining areas, enhancing disaster prevention and control capabilities, ensuring personnel safety, and improving production efficiency. Emergency communication support is a core priority.

II. Project Requirements

Modern mining communication systems must address the following challenges:

1. Open-pit Mining Scenarios

• Difficulty in achieving full wireless signal coverage.
• Unstable signals for mobile equipment (e.g., mining trucks).
• Dynamic coverage areas due to ongoing excavation.

2. Underground Mining Scenarios (Non-coal & Coal)

• Equipment must comply with KS certification standards.
• Complex network deployment in blasting zones.
• Diverse existing network types, increasing maintenance complexity.
• Environmental challenges: low lighting, high humidity, and dust.

III. Solution

CroSkylink Emergency Rescue Wireless Transmission Solution utilizes multi-hop self-organizing network (SON) technology to establish stable communication networks for both emergency response and daily operations.

1. System Architecture

• On-site Frontline:Handheld/backpack smart terminals connect to portable nodes via Mesh links, enabling mobile communication.Automatic inter-node networking supports real-time audio, video, and data transmission.
• Frontline Command Post:Emergency command vehicles equipped with SON command hubs build wireless Mesh networks with on-site devices.
• Rear Command Center:Connects to ground dispatch centers via 4G/5G or satellite links for remote command.

2. Technical Advantages

Multi-hop SON System:Features automatic networking, self-healing, and decentralized topology, ideal for harsh underground environments.

Supports 300+ concurrent terminals and full tunnel coverage (relay base stations deployed at intervals).

Device Features:

• Multiple form factors: handheld, backpack, vehicle-mounted, and airborne.
• Industrial-grade design: multi-bandwidth anti-interference, suitable for high-temperature and high-humidity conditions.
• Cost & Maintenance:No cabling required, flexible deployment, and low post-deployment maintenance costs.

IV. Summary

The multi-hop self-organizing network system ensures rapid network recovery through self-healing capabilities and decentralized architecture, guaranteeing uninterrupted communication. This solution significantly enhances mining productivity and safety, reduces disaster-related losses, and provides robust technical support for coal mine safety and operations.