矿山中不同含水砂岩破坏过程研究

Study on failure process of different water bearing sandstone in mine

通过对不同含水状态砂岩进行单轴加载声发射实验,主要仪器为TAW-3000伺服岩石试验机和PCI–2型声发射测试系统,分析水对砂岩失稳破裂过程中相位谱的影响。结果表明:砂岩破裂可以分为四个阶段,在整个声发射过程主要产生两种相位谱,A类相位(混合相位)与B类相位(完全非线性相位),并且B类相位谱在砂岩破裂的四个过程中出现的比例呈现增大趋势。在同一阶段中含水砂岩的B类相位谱比自然状态砂岩的B类相位谱高。

The sandstone with different hydrous degrees was studied for uniaxial compressive failure process, the main instrument was TAW-3000 computer controlled servo triaxial testing machine and PCI-2 acoustic emission detection analysis system, study on the effect of water on sandstone failure process of phase spectrum. The results show that the rupture of sandstone can be divided into four stages, In the whole acoustic emission process, two kinds of phase spectra are generated, the phase of class A（mixed phase） and class B phase（fully nonlinear phase）,and the proportion of B phase spectrum appeared in the four processes of sandstone fracture showed an increasing trend. At the same stage of type B phase spectra of sandstone full of water is higher than natural sandstone.