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SAE technical paper series, Volume 901229.
...) to support an underground habitat. The purpose of this effort was to demonstrate/validate the feasibility of building an operational habitat to support survivable and enduring operations of a deeply based ICBM weapon system... 
Water treatment | Heating, ventilation, and air conditioning systems (HVAC)
eJournal
Nature, ISSN 0028-0836, 12/2017, Volume 552, Issue 7685, pp. 339 - 340
... was sequestered underground. Erupted lava had the chance to interact with surface water to form hydrated crust on both Earth and ancient watery Mars. Wade et al. examine... 
Water | Mars | Extraterrestrial Environment | Observations | Mars (Planet)
Journal Article
Progress in energy and combustion science, ISSN 0360-1285, 2018, Volume 67, pp. 158 - 187
Underground coal gasification can convert deep coal resources into synthesis gas for use in the production of electricity, fuels and chemicals... 
Field demonstrations | Chemical reaction | Underground coal gasification | Fluid flow | COMBUSTION | ENERGY | ENERGY & FUELS | BANGLADESH | MODEL | LIGNITE | ENGINEERING, MECHANICAL | ENGINEERING, CHEMICAL | CAVITY GROWTH | SUBSIDENCE | THERMODYNAMICS | UCG | INDIA | WATER
Journal Article
2017, ISBN 9781498748308, xvi, 522 pages
Book
Renewable energy, ISSN 0960-1481, 2019, Volume 134, pp. 1381 - 1391
During the last decades, the Asturian Central Coal Basin (ACCB) has been a highly exploited coal mining area by means of underground mining and its network of tunnels extend among more than 30 mines... 
Hydropower | Coal mining | Underground water reservoir | Pumped storage | Energy storage | GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY | PUMPED-STORAGE | ENERGY & FUELS | POWER | Coal industry | Alternative energy sources | Energy management systems | Analysis
Journal Article
Journal of natural gas science and engineering, ISSN 1875-5100, 2015, Volume 26, pp. 960 - 973
Coal bed Methane (CBM), a primary component of natural gas, is a relatively clean source of energy. Nevertheless, the impact of considerable coal mine methane... 
Coal-water-gas separation | Sealing material | Permeability enhancement | Enhanced coal bed methane recovery | Dual-power drilling | ENERGY | PERMEABILITY | CO2 INJECTION | EMISSIONS | ENERGY & FUELS | CONFINING PRESSURE | DRAINAGE ECMM | ENGINEERING, CHEMICAL | GAS | SEAM | STRESS CHANGES | OUTBURST
Journal Article
Renewable & sustainable energy reviews, ISSN 1364-0321, 2019, Volume 108, pp. 498 - 512
Journal Article