Rib geomechanics: Its impacts in coal pillar extraction
Singh Satyendra K, H. Agrawal, A.P. Singh
Singh Satyendra K
Available Online November 2016.
- https://doi.org/10.2991/rare-16.2016.8How to use a DOI?
- Underground coal mining; Rib stability; Numerical stress determination; Numerical modelling; Rib mechanics
- In Bord & Pillar (B&P) depillaring, there are redistributions of mining-induced stresses on acontinual basis, primarily with apronounced effect on the natural supports - ribs and stooks. A rib need to be stable on temporary time-frame such that (a) it should provide adequate safety to men and machines during depillaring and (b) it should offer no resistance to caving, even in the worst situation when it is not 'judiciously' reduced during theretreat. The stability of ribs can be estimated through a well-known aspect ratio called factor of safety (FOS), which is thestrength of ribs (S) divided by stress (P) coming over it. The strength of ribs plays a pivotal role in estimating thestability of ribs, depending on geo-mining details, sequences of extraction and related technical/managerial issues in a depillaring panel. This paper suggests a modified rib strength formulation in addition to discussing related issues.Estimation of stress on ribs using numerical modeling with rational engineering judgements and pragmatic simulations have also been briefed in this paper.Case-study of depillaring panels in eight mines, having no pronounced geotechnical problems due to rib stability, have been analysed with the formula presented in this paper
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
TY - CONF AU - Singh Satyendra K AU - H. Agrawal AU - A.P. Singh PY - 2016/11 DA - 2016/11 TI - Rib geomechanics: Its impacts in coal pillar extraction BT - Recent Advances in Rock Engineering (RARE 2016) PB - Atlantis Press SN - 2352-5401 UR - https://doi.org/10.2991/rare-16.2016.8 DO - https://doi.org/10.2991/rare-16.2016.8 ID - SatyendraK2016/11 ER -