橡胶颗粒混凝土在深部软岩巷道中的数值模拟研究

    Numerical Simulation of Rubber Cement Concrete in Deep Soft Rock Roadway

    • 摘要: 为研究橡胶颗粒混凝土在高地应力软岩巷道底板支护的可行性,运用ABAQUS数值模拟软件,对橡胶颗粒混凝土在高地应力软岩巷道中的支护效果及其弹性模量和单轴抗压强度对卸压效果的影响进行模拟计算,并分析了橡胶颗粒混凝土的卸压机理。结果表明:在高地应力环境下,将橡胶颗粒混凝土应用于巷道底板与普通混凝土层之间效果较好;橡胶颗粒混凝土弹性模量在3~4 GPa,单轴抗压强度在3~5 MPa时得到最佳卸压效果;橡胶颗粒混凝土通过与底板围岩协同变形,释放围岩中的应力,从而减小支护结构所承受的荷载。

       

      Abstract: In order to explore the feasibility of rubber cement concrete supporting in soft rock roadway with high geo-stress, by using ABAQUS numerical simulation software, the supporting effect of rubber cement concrete in soft rock roadway with high geo-stress and the influence of elastic modulus and uniaxial compressive strength on the unloading effect are simulated and calculated. The results show that under the high geo-stress environment, the effect of applying rubber cement concrete between roadway floor and ordinary concrete layer is better. When the elastic modulus of rubber cement concrete is between 3 GPa and 4 GPa, and the uniaxial compressive strength is between 3 MPa and 5 MPa, the best pressure relief effect is obtained. Rubber cement concrete releases the stress in the surrounding rock by cooperating with the surrounding rock of the floor, thus reducing the load on the supporting structure.

       

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