Difference between revisions of "Ground support"

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==== '''Uses of Ground Support''' ====
 
==== '''Uses of Ground Support''' ====
   
Historically, the installation of ground support was confined to temporary or permanent excavations. Temporary excavations such as small and narrow shrinkage mining stopes, ''see article on'' [[Mining Methods would have been supported with long timber members to prevent ground failures in these workings. These workings would typically have remained opened for short periods of time (1-2 weeks). As for permanent excavations such as shaft stations which can remain opened for years, permanent support and reinforcement was installed. Often times, the temporary support previously put in place was removed and replaced with more permanent forms. This is contrary to modern practice where the rock-support interactions are an important design consideration. [[File:http://www.miningusa.com/old_photo/cutting%20timber.jpg]]
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Historically, the installation of ground support was confined to temporary or permanent excavations. Temporary excavations such as small and narrow shrinkage mining stopes, ''see article on'' [[Mining Methods would have been supported with long timber members to prevent ground failures in these workings. These workings would typically have remained opened for short periods of time (1-2 weeks). [[Image:Timber_Supports.jpg|thumb|right|Miner Cutting Timber Supports in Lynch, Kentucky in the 1950's for U.S. Steel]] As for permanent excavations such as shaft stations which can remain opened for years, permanent support and reinforcement was installed. Often times, the temporary support previously put in place was removed and replaced with more permanent forms. This is contrary to modern practice where the rock-support interactions are an important design consideration. 
 
 
 
Active vs. Passive
 
   
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<br> Active vs. Passive
   
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<br>
   
 
Primary vs. Secondary
 
Primary vs. Secondary

Revision as of 21:26, 7 February 2011

From Queen's University Mine Design Wiki

This article is about the application of ground support strategies and techniques to "underground mining projects". For the article on general geotechnical design see Geotechnical Design.

Ground support is a set of techniques, elements and methods that enable the conservation or mobilization of a rockmass' initial strength. The rockmass is given the ability to self-support throughout the course of mining. The ultimate goal of this practice is to allow for mining to occur safely while maintaining the stability of created underground excavations.These techniques can be divided into two main categories [1].

Support techniques refer to the action of applying an external reactive force to a rock surface in the process of deformation, i.e. submitted to strain causing changes in the shape, size and volume of the rock [2]. Reinforcement techniques refer to the action of adding internal support, e.g. rockbolts, to maintain or improve the rockmass' properties prior to deformation. 


See Main Article: The information required for the mine design

Significant Properties of Support Elements

Uses of Ground Support

Historically, the installation of ground support was confined to temporary or permanent excavations. Temporary excavations such as small and narrow shrinkage mining stopes, see article on [[Mining Methods would have been supported with long timber members to prevent ground failures in these workings. These workings would typically have remained opened for short periods of time (1-2 weeks).
Miner Cutting Timber Supports in Lynch, Kentucky in the 1950's for U.S. Steel
As for permanent excavations such as shaft stations which can remain opened for years, permanent support and reinforcement was installed. Often times, the temporary support previously put in place was removed and replaced with more permanent forms. This is contrary to modern practice where the rock-support interactions are an important design consideration. 


Active vs. Passive


Primary vs. Secondary

Types of Support

Empirical Support Design

The appropriate ground support strategies are selected through various engineering design techniques. In Ontario, this design selection is governed by legal requirements defined in the Ontario Occupational Health and Safety Act.

Historical Methods of Support

Design Parameters

Installation Methods

Equipment

References

  1. Brady, B. H.G. and E. T. Brown. "Rock Support and Reinforcement." Brady, B. H.G. and E. T. Brown. Rock Mechanics. Springer Science, 2005. p. 312 - 346.
  2. Nelson, Stephen A. "Physical Geology - EENS 111." 2007. Tulane University. http://www.tulane.edu/~sanelson/geol111/deform.htm

Further Reading

External Sources

http://en.wikipedia.org/wiki/Wikipedia:Citing_sources