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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Journal ArticleDOI
Performance of pillar design in underground stone mines that include discontinuities
TL;DR: In this paper, the authors describe a pillar design methodology that was developed from a study of pillar performance in operating stone mines and a numerical model (FLAC3D) for the entire rock mass has been developed in order to analyze the stability of the entire underground opening.
Journal ArticleDOI
Load Sensor Instability and Optimization of MEMS-based Tensile Testing Devices
Maria F. Pantano,Benedetta Calusi,Benedetta Calusi,Barbara Mazzolai,Horacio D. Espinosa,Nicola M. Pugno,Nicola M. Pugno +6 more
TL;DR: In this article, the authors quantitatively discussed the relationship between the rise of instability and the sensor stiffness, which is the key parameter to be optimized in a tensile testing platform.
Dissertation
La rupture brutale des piliers conditionne-t-elle les effondrements miniers ? : approches énergétiques par modélisation numérique
TL;DR: A differents endroits du monde, on observe that the methode d’exploitation miniere par chambres et piliers est associee a deux aleas de grande ampleur se manifestant en surface : les affaissements progressifs et les effondrements brutaux.
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Load Transfer Behavior During Cascading Pillar Failure: An Experimental Study
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One‐dimensional, semi‐analytical solution for time‐dependent behaviour of a seam
TL;DR: In this paper, a one-dimensional semi-analytical study of face advance in a coal seam assuming a Bingham type of material model is presented, and the changes in vertical stress and deformation in the seam due to change in the geometric configuration of the excavation are analyzed.
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.