... Estimates of in situ gas permeability in the waste rock were obtained from two types of tests using the borehole gas pressure monitoring system. ...
... within the dump is reduced because of water filling the pore spaces at high irrigation rates; this leads to a marked reduction in gas permeability and with it ...
...gas flow through in si-tu coal seam using tracer gases,it became clear that solid coal itself is hardly gas permeable or has extremely low gas permeability. ...
... ABSTRACT TO measure high temperature properties of blast furnace burdens ( the change of gas permeability accompanied by contraction, soft- ening and melting ...