COLLIERY SPOIL HEAP MATERIALS-TIME DEPENDENT CHANGES

Colliery spoil heap materials, with careful selection, quality control and sound engineering practice, can be used in construction and in land reclamation. From studies of the composition, physical distintegration and chemical weathering of unburnt spoil heaps, it is found that the spoil heap environment provides a definable quantity of material for utilization, and also a chance to establish which are the best and worst materials. Data from tests conducted on spoil heap materials from different areas in Britain are presented in support of the following conclusions: (1) The major variations within and between unburnt spoil heaps usually reflect original differences in the parental roof and floor rocks which comprise the discard. Generally, the most common discards contain mudstone/shale, seatearth, siltstone and minor sandstone fractions. (2) Breakdown tests suggest that an incipient "Shale rank" might exist. (3) Shear strength often varies considerably from one spoil heap to another in the same area, increasing with coal content. (4) Distintegration processes which are a function of mineralogy, sedimentary structures and slaking (air breakage) are part of a complex sequence of time-dependent changes. (5) Chemical weathering processes are very restricted once the discard is deeply buried within a tip, and there is little evidence to suggest that weathering processes are of any import.

  • Availability:
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Authors:
    • TAYLOR, R K
  • Publication Date: 1974-7

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 24-27
  • Serial:
    • GROUND ENGINEERING
    • Volume: 7
    • Issue Number: 4
    • Publisher: EMAP CONSTRUCT LIMITED
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00263538
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 19 1974 12:00AM