Experimental research on applying pressure build-up curves to determine the gas occurrence parameters of coal seam.

By using the theories and basic formula of pressure build-up curves in petroleum and gas exploitation, and combining the occurrence features of coal seams, the theories and methods of pressure build-up curves to determine the gas occurrence parameters of coal seams were constructed, which could determine the parameters quickly-such as gas pressure in coal seam and gas permeability coefficient, and guide gas drainage and coal and gas outburst prevention and efficient extraction of coalbed methane in coal mines. By comparing it with the test results of Hudi Coal Mine, the methods of pressure build-up curve were proved viable. [ABSTRACT FROM AUTHOR]