“…vertical displacements A NW-SE trending major fault marking the northern limit of the basin | A N –S trending bounding fault marking the eastern limit of the basin | Groundwater layer in the vicinity | No aquifer in the vicinity; safer distance (∼600 m ) from overlying Dupi Tila aquifer. | Active aquifer is unconformably overlying | Minor groundwater source in the vicinity; 2nd aquifer with lower hydraulic conductivity | Coal beds are overlain by Dupi Tila aquifer, major GW source | Regional aquifer Dupi Tila on top |
Overburden/Roof materials (preferably Impervious) | 150–200 m cover of hard, compacted, impervious Gondwana sandstone | 140 m thick Permian Gondwana sandstone (aquifer) in hydraulic continuity with the seam VI | 184 m Gy mudstone, sandstone and pebble interbeds of Surma group, lower permeability | >300 m of poorly consolidated water- bearing sandy layer forming Dupi Tila aquifer | unconformably overlain by loosely consolidated Upper Tertiary Dupi Tila sandy formation |
Hydraulic head | 108 bar | – | – | – | – |
Seam dipping | 5°–15° | 12° (seam VI) | – | 13.4° (seam-II) | – |
Reserve (Million Ton) | 1053 | 390 | 685 | 865 | 572 |
Cited | [ 1 , [83] , [84] , [85] ] | [ 73 , 86 ] | [ 72 , 87 ] | [ 75 , 88 ] | [ |
…”