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This report describes the practical assessment of three sites in the UK for multi-entry working: one at North Selby and two (West and North Parkgate) at Asfordby. The particular problems encountered at each site are considered, and the solutions discussed. The intensive use of rockbolting and pillar design methods to secure the entries is described in some detail, with particular attention to monitoring techniques and interpretation of data. At Asfordby, the use of sacrificial roadway techniques is described and a method of optimum pillar design is presented. At North Selby, it was demonstrated that rockbolt support of the strata was possible both in drivage and retreat, even at 1000 metres depth. In this important respect, the site was suitable for the purpose.

Additional information

Authors: BRITISH COAL CORPORATION, British Coal Corporation, Nottingham (GB)
Bibliographic Reference: EUR 14904 EN (1994) 210 pp., MF, ECU 12
Availability: (2)
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