10,050 m Single-Line Aramid Conveyor Belt for Long-Distance Coal Conveying

Lightweight Aramid Belt Technology Supporting Smoother, More Efficient Long-Distance Coal Transport

10,050 m Single-Line Aramid Conveyor Belt for Long-Distance Coal Conveying

Core Achievements

10,050 m single-line aramid belt delivery

BOTON delivered an ultra-long aramid conveyor belt with a single-line length of 10,050 m, supporting long-distance conveying on the 3-1 coal main roadway belt conveyor.

Improved protection of lump coal value

For Longhua Coal Mine’s non-caking coal, the aramid belt solution helped reduce conveying disturbance and secondary breakage, supporting a higher lump coal yield during long-distance transportation.

27 splices completed within 26 hours

During a limited shutdown window, BOTON’s service team completed 27 finger splices, including special pulling-head sections, within 26 hours.

Sunjiacha Longhua Coal Mine in Shaanxi, China, operates a 10-million-tonne-per-year coal production system requiring reliable, high-capacity transportation over extremely long distances. To upgrade the mine’s underground main roadway conveyor and surface coal washing system, BOTON supplied an integrated aramid conveyor belt solution covering belt design, manufacturing, delivery coordination, finger splicing and on-site technical support.

The core installation uses a 10,050 m single-line DPP2500 aramid conveyor belt, operating at a belt speed of 4.2 m/s. Compared with a conventional steel cord conveyor belt of equivalent strength, the lightweight aramid carcass reduces the energy required to move the belt itself, allowing more installed motor power to be used for transporting coal. Its stable running characteristics also help reduce vibration, impact and secondary breakage during long-distance conveying—an important consideration for protecting the lump coal yield and commercial value of Longhua Mine’s high-quality non-caking coal.

Key Facts

  • Industry: Coal Mining
  • Application: Long-Distance Coal Conveying
  • Site: Sunjiacha Longhua Coal Mine, Shaanxi, China
  • Customer: Shaanxi Coal and Chemical Industry Group Sunjiacha Longhua Mining Co., Ltd.
  • Main Line: 3-1 Coal Main Roadway No. 1 Belt Conveyor
  • Additional Scope: Surface Coal Washing System
  • Main Belt Specification: DPP2500, 1.6 m width, 8+8 mm cover rubber, 10,050 m length
  • Surface System Products: DPP2800, DP1600 and other belt specifications
  • Belt Speed: 4.2 m/s
  • Annual Output: 10 million tonnes
  • Splicing Method: Finger splice
  • Total Splices: 27, including special pulling-head sections
  • Delivery Scope: Belt design, product supply, production coordination, splicing and on-site technical service
Key Facts

Project Challenges

High belt weight on a long-distance conveyor

For a belt line exceeding 10 km, conventional steel cord belt weight can create significant non-productive power demand. A large share of motor power may be consumed by moving the belt itself rather than transporting coal.

Lump coal breakage during conveying

Longhua Coal Mine produces high-quality non-caking coal known for its lump coal value. Over a 5 km single-section conveying route, unstable running, vibration and impact can cause secondary breakage, reducing the proportion of lump coal and affecting product value.

Tight delivery and shutdown window

The customer required delivery of the ultra-long high-performance belt within 60 days, with the schedule overlapping the Spring Festival period. As a 10-million-tonne-class mine, Longhua Coal Mine also had a very limited shutdown window, requiring the splice work to be completed quickly while maintaining installation quality and splice reliability.

BOTON Solution

BOTON Solution

High-performance cover rubber system

BOTON developed a customized cover rubber system for the underground operating environment at Longhua Coal Mine. The rubber compound was designed for wear resistance, flame resistance and impact resistance, while maintaining strong adhesion with the aramid reinforcement layer.

Finger splice technology for high-speed operation

For the 4.2 m/s operating speed, BOTON applied finger splice technology instead of a conventional stepped splice structure. The finger splice design increases the effective bonding area and helps distribute load more evenly during high-speed operation, improving splice stability and reducing long-term maintenance risk.

Integrated structural design and site execution

BOTON applied an SW fabric structure to improve transverse rigidity and longitudinal modulus, helping reduce dynamic response and running disturbance during long-distance conveying. For installation, BOTON developed a special pulling-head structure combining aramid and steel cord reinforcement to improve pulling strength and stability. Digital production scheduling and a standardized 24-hour continuous splicing process further supported on-time delivery and reduced shutdown time.

Lightweight Aramid Conveyor Belt

BOTON supplied a high-strength DPP2500 aramid conveyor belt designed for ultra-long-distance coal conveying. Compared with a steel cord belt of equivalent strength, its lower belt weight reduces the power required to move the belt itself, helping improve conveying capacity while maintaining stable operation.

Project Gallery

Explore the production, installation and field performance of the Longhua Coal Mine aramid conveyor belt upgrade.

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