APPLICATION OF THE YIELD PILLAR TECHNIQUE FOR SUCCESSFUL DEPILLARING UNDER STIFF STRATA

Authors
SHEOREY PR BARAT D MUKHERJEE KP PRASAD RK DAS MN BANERJEE G DAS KK
Citation
Pr. Sheorey et al., APPLICATION OF THE YIELD PILLAR TECHNIQUE FOR SUCCESSFUL DEPILLARING UNDER STIFF STRATA, International journal of rock mechanics and mining sciences & geomechanics abstracts, 32(7), 1995, pp. 699-708
Citations number
10
Categorie Soggetti
Geosciences, Interdisciplinary","Mining & Mineral Processing
Journal title
International journal of rock mechanics and mining sciences & geomechanics abstracts → ACNP
ISSN journal
01489062
Volume
32
Issue
7
Year of publication
1995
Pages
699 - 708
Database
ISI
SICI code
Abstract
Related in this paper is a case study of double-section contiguous dep illaring of a 12.6m thick coal seam under massive and uncaveable sands tones. Drilling results indicate the sandstones to be 20-55m thick wit h high RQD values. Depillaring has been so far completed in five extra ction panels, leaving properly designed yield pillars in the goaf for prevention of air blasts. The paper gives the design procedure adopted for yield pillars and the results of long-term pillar displacement mo nitoring.