Document Type

Conference Paper

Publication Date


Publication Details

Vidal Navarro Torres, Anthony Steven Atkins and Raghu Nath Singh, Assessment of an Environmental Sustainability Index for the Underground Coal Gasification Process by Using Numerical Analysis, 14th Coal Operators' Conference, University of Wollongong, The Australasian Institute of Mining and Metallurgy & Mine Managers Association of Australia, 2014, 309-323.


In this study, an innovative numerical model is developed to quantify the environmental sustainability situation of an in-situ underground coal gasification (UCG) process which is expressed in terms of an Environmental Sustainability Index (ESI). This approach is based on four environmental indicators, namely: (i) rock and soil subsidence, (ii) groundwater quality, (iii) surface water quality and (iv) atmospheric quality, respectively. Based on the ESI values, this paper proposes a methodology for classifying the environmental sustainability state of the underground coal gasification (UCG) process and also proposes the corresponding Threshold Limit Value. Finally, a mathematical model is developed which is applied to El Tremedal Spanish trial.