Determination of immediate roof at mines of the Kutahya-Omerler coal basin, Turkey

Konak G., ONARGAN T., AKSOY C. O., Kose H., Tatar C., Pamukcu C.

JOURNAL OF MINING SCIENCE, cilt.42, sa.2, ss.157-170, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42 Sayı: 2
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1007/s10913-006-0043-6
  • Dergi Adı: JOURNAL OF MINING SCIENCE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.157-170
  • Anahtar Kelimeler: numerical analysis, bulking factor, immediate roof, convergence of beds, load density on support
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

The estimation of the relations between excavation height, longwall advance rate, convergence around a longwall in the roof - soil direction, and load distribution on support is reported, that are of specific importance for selecting support type. The principal attention is focused on determination of the immediate roof height that depends on the mobility characteristics of overlying rocks and governs mainly the stoping convergence and load intensity on the support. Numerical modeling, laboratory and field experiments are undertaken in this study, which included evaluation of composition and physicomechanical properties of rocks, assessment of stress-strain state of rock mass and of the immediate roof height, measurements of disintegration and bulking factor of overlying rocks, convergence of stoping floor and roof, and loads on hydraulic legs of supports. The study parameters obtained by different methods for the Omerler Mine are presented.