Longwall Coal Clearance System

Longwall Coal Clearance System

NEPEAN Longwall’s foundation product and a core focus of the business is longwall AFC equipment. NEPEAN Longwall has supplied equipment to over 18 longwall faces with more than 1,500 AFC pans placed into the market over a 20-year period. Our standard 1,000mm raceway AFC is based on our proven product (delivered to more than ten longwall mines) with outstanding life, ease of overhaul and few structural issues. Our latest design is lower in height with great attention to detail to simplify the face side cast section for improved loading and horizon control. The new pan has superior wear characteristics with 50 mm top deck plate thickness and 30 mm bottom plate thickness.

NEPEAN Longwall’s AFC pans are fabricated using cast steel side sections (sigmas) with either Bisalloy 450 or Hardox 450 deck plates, which have proven to be a long-lasting combination in terms of both wear resistance and crack-resistant fatigue performance. Our AFC pans are operating successfully over a broad range of low and thick seam applications, carrying shearers up to 120-tonne with 2 x 900 kW cutter motors.

The standard NEPEAN Longwall AFC drive arrangement uses our Class 45 size drive-frames designed to accept 855 kW powertrains and 42 mm Solid Profile (forged vertical link) AFC chain. The Maingate cross-frame and integrated non-driven return end (NDRE) are sized for 38 mm Solid Profile Chain BSL chain while achieving a minimum overall height equivalent to 34 mm DIN chain. Similarly, the tensional tailgate drive with 1,000 mm stroke caters for an 855 kW power train.

Significant investment has been made in ensuring that designs are checked and verified prior to manufacture. This combines with NEPEAN Longwall’s proven ISO 9001 quality management system which is applied to China-based manufacturing locations – the system includes detailed Inspection and Test Plans (ITP) along with Fabrication Record Sheets (FRS) that ensure all products are delivered in accordance with relevant specifications.