Mining in the 21st century using information technology

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Sommaire: A theory for cutter roof failure in coal mines has been developed. It is shown that the key parameters influencing the likelihood of cutter roof failure are the rock strength, the vertical stress (depth) and the horizontal to vertical stress ratio. The support force necessary to prevent the development of this mode of failure is, in most cases, so high as to make it impractical to apply a force of such magnitude. It is, therefore, better to allow the failure to occur and to design a bolting...
Publication: CIM Bulletin
Auteur(s): K. Barron, A. Baydusa
Numéro: 1032
Volume: 92
Année: 1999
Texte
Sommaire: One of the major unsolved problems of safe, economical roof support in the evaporite industry has been that of obtaining and maintaining anchorages in relatively soft rock. This is due to the viscoelastic and viscoplastic behaviour of salt rock and associated deposits.
This paper introduces a low-cost, yieldable support mechanism, consisting of a system of buckling disks, which provides viable solutions to dynamic support. The yieldable support system offers a number of advantages in...
Publication: CIM Bulletin
Auteur(s): E. De Souza, P. Mottahed
Numéro: 1032
Volume: 92
Année: 1999
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