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利用数值计算方法模拟了动压巷道遇水作用后围岩位移场和渗流场演化的阶段性规律和变形失稳过程,分析了巷道初期支护稳定但随动压反复作用与水逐渐渗入围岩呈现“泥化-变形-再泥化-失稳”的规律,指出软弱夹层遇水泥化是导致动压巷道失稳的主要诱因.利用层次分析法和计算机VB程序建立了针对该类巷道安全性的评判方法和判定程序,提出了水作用下动压巷道的强化控制技术.工程实例表明,必须加强对水的治理才能保持动压巷道稳定性.
The stage law of deformation and instability of the displacement field and seepage field of surrounding rock after water-bearing interaction are simulated by numerical calculation method. The initial support of the roadway is stable but with the repeated action of dynamic pressure and water infiltration into the surrounding rock The results show that the cementing of the soft interlayer is the main cause of the instability of dynamic pressure roadway.Based on the analytic hierarchy process and the computer VB program, Safety evaluation method and judgment procedure, put forward the strengthening control technology of dynamic pressure roadway under the action of water.Examples of engineering show that it is necessary to strengthen the water treatment in order to maintain the stability of dynamic pressure roadway.