Investigation of the effects of main roof loading on the breaking distance of the immediate roof in longwall mining Uzunayak madenciliǧinde ana tavan yüklemesinin yalanci tavan kirilma mesafesi üzerine etkilerinin incelenmesi

Köken E., Özarslan A.

Madencilik, vol.55, no.2, pp.3-22, 2016 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 2
  • Publication Date: 2016
  • Journal Name: Madencilik
  • Journal Indexes: Scopus
  • Page Numbers: pp.3-22
  • Keywords: Breaking distance of immediate roof, Longwall, Main roof loading, Strata control
  • Abdullah Gül University Affiliated: Yes


As known from the previous studies that the cavability of immediate roof is important to maintain an effective strata control. The other issue should be paid attention in breaking of immediate roof affected by geomechanical properties of roof strata, is the main roof loading. It is not accurately revealed how and to what extent main roof acts on the immediate roof. Important approximations aiming to estimate the breaking distance of immediate roof are summarized in this study. The effect of main roof acting upon the immediate roof with different thickness and triangular distributed loading conditions is investigated according to elastic beam theory. The results obtained from parametrical analysis using beam theory are compared to the breaking distance values of six longwalls located in Zonguldak Hard coal Basin. In conclusion, significant effects of main roof loading are seen for the breaking distance of immediate roof.