Research On Rock Structure Evolution Caused By Mining Of Protecting Strata And Relieved Methane Drainage

Under the protective layer theory, and the occurrence of Methane flow theory and masonry beams, Theory and the key layer of coal and Methane outburst theory under the protective layer of overburden rock mining spatial structure evolution and mechanical properties, Meanwhile, numerical simulation and physical simulation technologies for the resumption of space rock mining structure nature of the stress and strain analysis; the protective layer of Methane migration relieving mining laws;Huainan coal mining under the protective layer of concrete practice, the establishment of Methane drainage systems, optimizing Methane drainage parameters, reduce the protective layer of Methane content, reduced Methane pressure and improve Methane drainage rate eliminating the protection layer Methane outburst purposes;Experience show that: exploited by the protective layer(coal seam B10), Perforate and Depressurizing Methane drainage from the floor of the B11b and excavating the tunnel of the Methane to drainage Methane is successful. It has canceled the blowout dangerous of The Coal and Methane, the content of Methane has reduced, and reduced the Methane pour form the workface so that the seam of B11b could be exploited by machine, it Realized fast stoping and tunneling by safety and highlyIt will be under the protective layer of overburden rock mining space structure and evolution of Methane drainage relieving comprehensive study, To achieve protection layer mining pumping reference Integration and good for green exploring .