The Effect Of Water On Creep Law Of Deep Soft Rock

With the development of coal mining's depth, the phenomenons of various creep happen according as time increase, the problems of tunnel tunneling, supporting and maintenance are more and more outstanding. Because water deteriorates the wall rock configuration and mechanics performance, make actual stress be bigger than apparent stress, the high ground stress makes the rock deform largely and it threats the safe work seriously. Meanwhile the repeated supporting for tunnels brings about a lot of economic losses. Aiming at the phenomenon that after tunnel is excavated, the water content of engineering wall rock will change because of the increase in paths of groundwater seepage, and the creep laws of engineering wall rocks will also changes, we studied the problem that the change of water content works on the creep deformation law of soft rock and its constitutive equation. And a mathematical modal of solid – fluid coupling of one – phrase fluid flowing in porous media of creep deformation (the medium is material Bu of uniformity, isotropy) was established based on it. The result shows that solid – fluid coupling is an important factor affecting non – linear property of soft rock creep. As a new way, scientific calculation is wildly used in various areas. The creeps of rocks in different water content are calculated by Matlab in this thesis. And the calculation results accord with the theory analysis.