NASA NTRS · 19840000090
Coal-Face Fracture With A Two-Phase Liquid
Abstract
In new method for mining coal without explosive, two-phase liquid such as CO2 and water, injected at high pressure into deeper ends of holes drilled in coal face. Liquid permeates coal seam through existing microfractures; as liquid seeps back toward face, pressure eventually drops below critical value at which dissolved gas flashvaporizes, breaking up coal.
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Collins, E. R., Jr.. 1985-01-01. Coal-Face Fracture With A Two-Phase Liquid. https://ntrs.nasa.gov/citations/19840000090
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