… gasifier. In this study, an application of a coaxial UCG system with a horizontal hole is
discussed by means of the model UCG experiments with a large-scale simulated coal …

… underground coal gasification: shaft gasification and shaftless gasification. … hole but was
supplemented by the nos. 3, 2, and 1 holes, and it gradually drew the fire source from the S hole …

… of the horizontal slot was taken as the injection hole and the other as the production hole. A
… ] for injecting the oxidant directly through a horizontal bore hole. The blocks were sealed with …

… back to the coal surface. The gasification reaction zone propagates horizontally in the
coal … direction between the parallel horizontal holes drilled approximately in the coal butt-cleat …

… In a chosen panel of coal, a set of two horizontal holes were bored. The pipes were attached
… the coal in one of the holes, oxygen was injected into the coal through this hole. The second …

… coal gasification (UCG), an artificial coal seam was constructed to use as a simulated
underground gasifier, which comprised coal … -hole, and (c) a linking-hole model using a horizontal …

… We compare the design for horizontal and steeply dipping coal seams with pertinent … surface
so that the drilled holes remain in the coal seam. However, for horizontal beds, the drilling is …

… The conventional way for building a gasifier is to drill an injection hole and an exhaust hole
… horizontal channel and the inclined channels in the bottom of gasifier, the coal to be gasified …

… In the controlled retraction injection point (CRIP) configuration, the UCG panel has a large
dimension and two or three in-seam holes (horizontal wells) are drilled in parallel to the coal …

… Phase-II starts thereafter, in which the cavity grows in the horizontal direction toward the …
Two vertical holes were drilled and connected at the bottom of the coal block. The inlet …