Community Research and Development Information Service - CORDIS

Abstract

Anthracite mining takes place at increasingly deep levels and, consequently, under ever-increasing rock-pressures, which means that larger elements of the excavated areas are not naturally stable. The necessary corrective measures are very expensive. Numerical procedures have been used to simulate the various conditions which can arise in such deep-level excavation operations. These employed finite-difference procedures for 2-dimensional calculations and a finite-element procedure for a limited amount of work on 3-dimensional situations. Different models involving continuous and discontinuous excavation were studied in detail and reliable rock structure parameters were determined for different layer formations. These results were used to produce further extensive calculations applying to the convergence-development of coal-faces using different excavation techniques, the influence of visco-elastic creep and of pressure-redistribution procedures. Restricted computer capacity confined 3-dimensional investigations to elasticity considerations but even this was helpful in the context of complicated excavations and face-extension conditions - problems that cannot be addressed by the use of 2-dimensional calculations.

Additional information

Authors: DMT, DMT (DE)
Bibliographic Reference: EUR 17414 DE (1998) 68pp.
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4545-1
Record Number: 199910854 / Last updated on: 1999-06-18
Category: PUBLICATION
Original language: de
Available languages: de
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