Journal ArticleDOI
Stability, instability and design of pillar workings
TLDR
In this article, the stability of pillar workings is discussed by generalizing the simple mechanism of the laboratory test to the mining situation, and it is proved that the workings will remain stable, regardless of the magnitude of the convergence experienced by the pillars, if the minimum slope of the load-convergence relations is greater than the smallest eigenvalue of K taken with a negative sign.About:
This article is published in International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts.The article was published on 1970-11-01. It has received 227 citations till now. The article focuses on the topics: Stiffness matrix & Rock mass classification.read more
Citations
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Predicting pillar burst by an explicit modelling of kinetic energy
TL;DR: In this paper, an explicit numerical modeling method was used to calculate and locate the damping of this kinetic energy during pillar failure, considering simple 2D geometries, and arguments in favour of the validation of the numerical results are provided by comparison to analytical calculations and to an empirical classification of rockbursts proposed by Ortlepp.
Journal ArticleDOI
Field and simulation study of the rational coal pillar width in extra‐thick coal seams
Journal ArticleDOI
Numerical modelling of rock preconditioning by destress blasting
B. Tang,Hani S. Mitri +1 more
TL;DR: In this paper, a three-dimensional numerical modeling technique for the simulation of rock preconditioning by destress blasting in hard rock mining operations at depth is described, based on incremental analysis.
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Influence of strain energy released from a test machine on rock failure process
Yuhang Xu,Ming Cai,Ming Cai +2 more
TL;DR: In this article, the theoretical analysis on the energy transfer in the process of rock failure revealed that the rock failur is unstable if the energy supplied to the rock failure process is excessive.
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Seismological and energy balance constraints on the mechanism of a catastrophic bump in the Book Cliffs coal mining district, Utah, U.S.A.
TL;DR: The authors in this paper suggest that this catastrophic coal bump was precipitated by a subsidence-related fault slip, with normal slip on a fault in close proximity to the mine workings.
References
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Journal Article
A study of the strength of coal pillars
A.H. Salamon,M.D.G. Munro +1 more
TL;DR: In this paper, the strength of coal pillars in South African collieries is derived based on data obtained from a survey of actual mining dimensions, which include information concerning both stable and collapsed areas of mining.
Journal ArticleDOI
The failure of rock
TL;DR: In this paper, an analysis of the energy changes associated with the extension of Griffith cracks in tension and compression is made, which shows that the non-elastic behaviour can be described by a curved Griffith locus in the strain-stress plane.