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利用微机伺服岩石三轴试验机对取自西鞍山铁矿的花岗岩进行5组不同围压下的常规三轴压缩实验,绘制了不同围压下花岗岩的全应力-应变曲线,并系统地分析了花岗岩的屈服强度、抗压强度与围压的关系。从能量角度研究了岩石的变形破坏过程,讨论了峰前极限应变能密度和峰前弹性应变能密度的比例关系,分析了花岗岩峰前极限应变能密度、峰前弹性应变能密度、峰前耗散能密度的围压效应,发现花岗岩的峰前极限应变能密度和峰前弹性应变能密度均与试验围压呈良好的正线性关系;通过线弹性能判据方法对储备大量弹性应变能的硬质脆性花岗岩岩体进行岩爆预测,得出该花岗岩所处矿体有强烈岩爆倾向的结论。
The three-axis compression tests of granite from the West Iron Mine in West Anshan deposit under different confining pressure were performed by computerized servo-rock triaxial testing machine. The full stress-strain curves of granite under different confining pressures were plotted and analyzed systematically Relationship between yield strength, compressive strength and confining pressure of granite. From the energy point of view, the deformation and failure process of rock are studied. The relationship between the pre-peak strain energy density and the pre-peak elastic strain energy density is discussed. The pre-peak ultimate strain energy density, pre-peak elastic strain energy density, Confining pressure effect of scattered energy density. It is found that both the pre-peak strain energy density and the pre-peak elastic strain energy density of granite have a good positive linear relationship with the test confining pressure. By means of the linear elastic criterion, a large amount of elastic strain energy The rock brittle granite is subjected to rockburst prediction, and the conclusion is drawn that there is a strong rock burst tendency in the granite.