The shape effect and rock mass structural control for mine pillar design

2013 ◽  
pp. 563-567
Author(s):  
L da Silva ◽  
A da Silva ◽  
E Sansone
Keyword(s):  
Rock Mass ◽  
Structural Control ◽  
Shape Effect ◽  
Pillar Design

Rock mass strength at depth and implications for pillar design

2011 ◽  
Vol 120 (3) ◽  
pp. 170-179 ◽  
Author(s):  
P K Kaiser ◽  
B Kim ◽  
R P Bewick ◽  
B Valley
Keyword(s):  
Rock Mass ◽  
Pillar Design ◽  
Rock Mass Strength

scholarly journals Rock Pillar Design Using a Masonry Equivalent Numerical Model

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 890
Author(s):  
Ricardo Moffat ◽  
Cristian Caceres ◽  
Eugenia Tapia
Keyword(s):  
Rock Mass ◽  
Failure Modes ◽  
Underground Mining ◽  
Numerical Models ◽  
Numerical Approach ◽  
Practical Experience ◽  
Engineering Problem ◽  
Pillar Design ◽  
Rock Pillar ◽  
Rock Pillars

In underground mining, the design of rock pillars is of crucial importance as these are structures that allow safe mining by maintaining the stability of the surrounding excavations. Pillar design is often a complex task, as it involves estimating the loads at depths and the strength of the rock mass fabric, which depend on the intact strength of the rock and the shape of the pillar in terms of the aspect ratio (width/height). The design also depends on the number, persistence, orientation, and strength of the discontinuities with respect to the orientation and magnitude of the stresses present. Solutions to this engineering problem are based on one or more of the following approaches: empirical design methods, practical experience, and/or numerical modeling. Based on the similarities between masonry structures and rock mass characteristics, an equivalent approach is proposed as the one commonly used in masonry but applied to rock pillar design. Numerical models using different geometric configurations and state of stresses are carried out using a finite difference numerical approach with an adapted masonry model applied to rocks. The results show the capability of the numerical approach to replicate common types of pillar failure modes and stability thresholds as those observed in practice.

Biomimetic materials: An introduction

1992 ◽  
Vol 50 (2) ◽  
pp. 1020-1021 ◽  
Author(s):  
M. Sarikaya ◽  
J. T. Staley ◽  
I. A. Aksay
Keyword(s):  
Self Assembly ◽  
Structural Control ◽  
Hierarchical Structures ◽  
Ceramic Composites ◽  
Advanced Materials ◽  
Length Scale ◽  
Spider Webs ◽  
Biomimetic Materials ◽  
Synthetic Materials ◽  
All Ceramic

Biomimetics is an area of research in which the analysis of structures and functions of natural materials provide a source of inspiration for design and processing concepts for novel synthetic materials. Through biomimetics, it may be possible to establish structural control on a continuous length scale, resulting in superior structures able to withstand the requirements placed upon advanced materials. It is well recognized that biological systems efficiently produce complex and hierarchical structures on the molecular, micrometer, and macro scales with unique properties, and with greater structural control than is possible with synthetic materials. The dynamism of these systems allows the collection and transport of constituents; the nucleation, configuration, and growth of new structures by self-assembly; and the repair and replacement of old and damaged components. These materials include all-organic components such as spider webs and insect cuticles (Fig. 1); inorganic-organic composites, such as seashells (Fig. 2) and bones; all-ceramic composites, such as sea urchin teeth, spines, and other skeletal units (Fig. 3); and inorganic ultrafine magnetic and semiconducting particles produced by bacteria and algae, respectively (Fig. 4).

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