The layout of high level tunnel for drawing out gas in the fracture zone to excavate tunnel rapidly
Abstract：Using the probability integral method to calculate a point in the six strain components,εx,εy,εz,γxy,γxz,γyz,at the working surface of the overlying rock obtained the three main strain ε1,ε2,ε3;substituting three principal strain into the criterion of the D-P,Calculated the stress difference.If the result is less than zero,the point does not destroy;if the result equal to zero,the point in a critical state;if the result is greater than zero,the point of destruction.Accordingly we can judge on the scope of the development of the overburden fracture.With field observing the scope of the fracture overburden and determination of gas content,we can determine the location of the high level tunnel for drawing out gas(HLTDG),and achieve the rapid excavation of the high level tunnel for drawing out gas.In HLTDG we can draw out gas with the scope of the delineation,and then achieve rapidly to excavate up and down the tunnel.
Keywords：probability integral methodhigh level tunnel for drawing out gasD-P criterion
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 512-517 )