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One‐dimensional, semi‐analytical solution for time‐dependent behaviour of a seam
Author(s) -
Nawrocki Pawel A.
Publication year - 1995
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1610190104
Subject(s) - viscoplasticity , deformation (meteorology) , geotechnical engineering , stress (linguistics) , mechanics , coal mining , geology , stability (learning theory) , excavation , coal , structural engineering , engineering , computer science , finite element method , physics , constitutive equation , oceanography , linguistics , philosophy , machine learning , waste management
The paper provides a one‐dimensional, semi‐analytical study of face advance in a coal seam assuming a Bingham type of material model. The changes in vertical stress and deformation in the seam due to change in the geometric configuration of the excavation are analysed. The general analytical formulae defining stresses and strains for an arbitrary time instant i Δ t ( i = 1,2,…) are derived, and the size of the viscoplastic zone near the opening and its evolution with time are determined. The influence of the seam extraction rate on the stability of the seam and rock burst occurrence is discussed in the light of the developments presented in this paper.