A key factor enabling the achievement of the required capacity by longwall mining systems is to obtain a satisfactory service life for individual components of such systems. Such components include right-angle planetary gearboxes for armoured face conveyors. An increase in the service life of such equipment can be achieved by ensuring adequacy in terms of design, materials and organization. As ...

In coal mining, longwall mining is a preferred method to maximize production by extracting large blocks of coal that have been outlined with a set of development entries. In U.S. mines, longwall panels are typically 305 m (1,000ft) wide (with a continual trend towards even wider panels), and usually over 3,050 m (10,000ft) in length. The increasing size of longwall panels, while helping to incr...

The article proposes a constructive technical solution to increase the contact adaptivity of mechanical roof support. developed mechanized support section is able adapt changing mining and geological conditions in process excavation pillar, which increases efficiency safety coal longwall.

Coal is still the major resource to meet expanding energy demand and widely used in coal-fired thermal power plants taking advantage of rich reserves cost-effective production. Longwall mining a method that Türkiye, line with trend world, enables economical sustainable production underground coal resources mechanized equipment. Estimation stress distribution concentration zones excavation face ...

In the 3 years to June 30, 2008, 4,633 injuries occurring underground at NSW (Australia) coal mines were reported to the insurer. Equipment was involved in 2149 of these injuries (46%). The narrative field accompanying these reports was examined to determine opportunities for controlling injury risks. The most common equipment types involved were: Continuous miner (12% of all underground injuri...

Mining-induced subsidence is critical for ecological environment reconstruction and damage prevention in coal mining areas. Understanding the characteristics of surface with multi-seam first step. Surface different panel layout configurations was investigated by means UDEC numerical simulation. Based on simulation results, it indicated that configuration had a significant impact subsidence, inc...