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This report covers the second stage of research into coal-face deformation behaviour in the context of high output longwall faces. The use of two instrumentation systems in parallel enabled a large quantity of data to be obtained. A major refinement of the geotechnical survey work provided better information on coal seam discontinuities and better definition of potential roof failure zones. Trends were established between coalface strata deformation and geological and mining influences. The bulk of coalface investigations were conducted on new types of support within the shield or chock shield range. Investigations were carried out in seams ranging from 1m to 3m thickness and at 300m to almost 800m cover depth. Simulations using the Finite Element method of stress analysis have been developed. Initial models of coalface strata and powered support systems are based on two-dimensional, plane strain, linear elastic conditions. For greater realism, facilities for bed separation and jointing will be required.

Additional information

Authors: BRITISH COAL CORPORATION, British Coal Corporation, Headquarters Technical Department, Hobart House, Grosvenor Gardens, London SW1 7EA (GB)
Bibliographic Reference: EUR 12311 EN (1989) MF, 170 pp., ECU 8, blow-up copy ECU 21.25
Availability: (2)
Record Number: 198911185 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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