Hoe Creek II Revisited: Boundaries of the Gasification Zone

Structural changes in coal at elevated temperature pertinent to underground coal gasification: A review

“…Potential geomechanical and hydrogeological damages/risks to coal, strata, and ground water during and after a UCG process can be listed as follows (Aiman et al, 1980;Brandenburg et al, 1975;Burton et al, 2007;Cooke and Oliver, 1983;Couch, 2009;Kapusta et al, 2013;Northrop et al, 1977;Sury et al, 2004a,b;Youngberg et al, 1983):…”

“…Numerous UCG trials have been performed worldwide (Burton et al, 2007;Couch, 2009). Findings from some of them were reported and are publically available (Aiman et al, 1980;Bartel et al, 1976;Brandenburg et al, 1975;Cooke and Oliver, 1983;Kapusta et al, 2013;Luo et al, 2008;Northrop et al, 1977;Wang et al, 2009;Youngberg et al, 1983). The outcomes of these trails focused on syngas flow, syngas heating value and composition, temperature front movement with time, microseismic events, ground water contamination studies, and boundaries of the UCG cavities.…”

“…indicates that the boundary is conjectural.) (Aiman et al, 1980). that particular site for syngas production, also helped to understand the geomechanical and hydrogeological impacts of UCG (Aiman et al, 1980;Brandenburg et al, 1975;Cooke and Oliver, 1983;Northrop et al, 1977;Youngberg et al, 1983) which are reviewed and discussed in Sections 2.1 to 2.3 of this paper.…”

“…Post-gasification boring was done in the Hoe Creek II test site, 9 months after termination of the gasification as reported by Aiman et al (1980). As depicted in Fig.…”