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Highwall mining

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Highwall mining

  1. 1. PRESENTATION ON Highwall Mining I. Satyanarayana, M.Tech,MBA,MCADy. Manager, Project Planning, SCCL, isnindian@gmail.com, visit at www.slideshare.com/isnindian
  2. 2. High Wall Mining Technology• Highwall Mining is a remotely controlled mining method, which extracts coal from the face of a coal seam under a highwall in a surface mine, which has reached the final highwall position due to uneconomic stripping ratios Or due to local constraints which limit further surface mining.• The coal left in the High wall can be extracted by this technology which otherwise would be lost for ever• SCCL is the 1st company implementing this technology in India• The following mines are identified for extraction of coal from the Highwall by using this technology • RG OC II Extension (already extracted) • RG OC I Expansion • Medapalli OC Expansion • Koyagudem OC II
  3. 3. Highwall Mining Technology:• This method relies upon the self supporting capacity of the strata above the series of parallel entries driven mechanically to a considerable depth without artificial roof support and ventilation in the seam horizon.• This technology provides an economical way to extract coal reserves locked up in the highwall.• The extent of an opencast project is limited by the financial viability, though coal seam continues to exist beyond the quarry limits.• Non-replenishable coal is getting lost forever within the highwalls of the opencast projects.• This technology is being practiced in USA, Australia and Indonesia• Limiting gradient – 1 in 3.5 and maximum penetrating depth (in level gradient) is around 500 m
  4. 4. HIGH WALL MINING
  5. 5. Highwall Mining system
  6. 6. Highwall Mining system Video
  7. 7. High wall Mining Technology
  8. 8. High wall Mining Technology – Auger Type• Consisting of single or dual cutting heads with coal being cleared by spiraled flights, creating circular entries
  9. 9. High wall Mining Technology – Auger TypeDUAL HEAD AUGER
  10. 10. Highwall Mining Methods - Continuous Highwall Miner (CHM)Consisting of a remotely operated continuous miner followed by a seriesof material transfer cars, creating rectangular entries
  11. 11. PUNCH LONGWALL

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