Computer modelling is being used to simulate rock fracture, caving and stress redistribution
about longwall panels with increasing confidence. The models are being assessed against …

… and caving ratio, coal caving sequence, caving step, and caving rounds, we … caving ratio
of 1:2–3 has a good caving effect. When two-round sequential caving is adopted and the caving …

… Intraspecific variation is a common feature among intractable weeds (Cavers. 1985).
Such variation poses problems for all weed control programmes whether they are based on …

… caving about longwall panels. The aim of the work was to provide a greater understanding
of the ground caving process and the implications to longwall support operation and design. …

… Vastly different caving styles have been defined in this project. Two examples are presented
to demonstrate the variability in caving as a result of rock strength properties and stressfi~ld. …

… an extra-thick seam; the fine caving technology is also put forward, that is, single-opening
caving method at the end and double-opening caving method in the middle, which provides a …

This article documents the addition of 396 microsatellite marker loci to the Molecular
Ecology Resources Database. Loci were developed for the following species: Anthocidaris …

… powellii Wats.), the same species that Frost (1971) and Cavers (unpubl.) have shown to …
(1982) and unpublished data by PB Cavers with Amaranthus spp. indicate that such variation …

II. Habitat.(a) Climatic and topographical limitations. There does not appear to be any climatic
limitation of the species in Britain.. As a'follower of man'its absence from high altitude areas …

(1) THE compiler of this introduction to plant J_ geography appears to be somewhat out of
touch with the modern development of the subject from the ecological point of view. The work …