Field scale assessment of artificial topsoil: a Victorian coal mine experience

Anna Birjak, Alena Walmsley, Nicole Anderson, Jon Missen, Mohan Yellishetty

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The Latrobe Valley is host to several open-cut coal mines which pose an environmental risk if poorly managed. To reduce risks associated with acid mine drainage and fire, progressive rehabilitation of batters is recommended. A lack of topsoil in the Latrobe Valley has led an industrial symbiosis to generate artificial topsoil’s (ATS). Based on previous experiments, three ATS were created by combining overburden (OB), brown coal (BC), fly ash (FA) and one of the two waste products from a local paper mill – Effluent Sewage Recovery (ESR) or Enviroshield (ES). The ATS were compared to a local topsoil (TS). The study analyzed the physical and chemical properties of the topsoil’s, seed germination and grass establishment. It was found that all ATS had similar properties and were alkaline compared to an acidic TS. The ATS were enriched in salts and found to be sodic to highly sodic and highly saline while TS was non-saline but slightly sodic. The ATS were also low in nitrogen and, due to the high pH of the soil, nutrients such as phosphorus, iron and manganese were not bioavailable. For the duration of the study, germination and grass establishment on ATS was not significant, however, grass was beginning to establish on the TS. As such, it is recommended further investigation be undertaken to determine an appropriate seed mix for the ATS which is tolerant to alkaline and saline soils. Further research is being conducted to determine the source of the alkalinity and salinity in the ATS.

Original languageEnglish
Title of host publicationProceedings of the 28th International Symposium on Mine Planning and Equipment Selection - MPES 2019
EditorsErkan Topal
Place of PublicationCham Switzerland
PublisherSpringer
Pages376-389
Number of pages14
ISBN (Electronic)9783030339548
ISBN (Print)9783030339531
DOIs
Publication statusPublished - 2020
EventInternational Symposium on Mine Planning and Equipment Selection 2019 - Perth, Australia
Duration: 2 Dec 20194 Dec 2019
Conference number: 28th
https://www.springer.com/gp/book/9783030339531

Publication series

NameSpringer Series in Geomechanics and Geoengineering
PublisherSpringer
ISSN (Print)1866-8755
ISSN (Electronic)1866-8763

Conference

ConferenceInternational Symposium on Mine Planning and Equipment Selection 2019
Abbreviated titleMPES 2019
CountryAustralia
CityPerth
Period2/12/194/12/19
Internet address

Keywords

  • Artificial soil
  • Coal mining
  • Rehabilitation

Cite this