Investigations on Nonlinear Theory of Coal and Rock Damage and Fracture

摘要：

Uniaxial and triaxial compression tests on coal and sandstone were conducted under different kinds of conditions, including axial strain control, steady hoop strain control and under different confining pressures. After analyzing the process of cyclic loading and unloading on coal and sandstone, the results of the loading or unloading process indicate that stress and the elastic strain are the quadratic polynomial function, and coal and rock express the nonlinear elasticity characters. Based on the principle of damage mechanics and thermodynamics, the paper analyzes the test data, derives and establishes the nonlinear damage evolution equation and the nonlinear damage evolution constitutive equation of coal and rock.

关键词： coal and rock damage constitutive equation nonlinearity

作者: WANG Li YANG Xiaobin QIN Yueping LIU Wei

作者单位: State Key Laboratory for GeoMechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing),Beijing 100083, China

会议类型: 国际会议

会议名称: The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)

会议地点: 杭州

会议语种:英文

页码: 1585-1590

在线出版日期: 2010-10-26（万方平台首次上网日期，不代表论文的发表时间）