An Experimental Study on the Mechanical Characteristics of Sandstone-like Material with Preset Filling Joints
This paper investigates the strength and deformation characteristics of the sandstone-like material contai ning the preset filling joints.The test specimens are designed with different height-diameter ratio.The uniax ial compression and shear tests were performed during the experimental studies.The results show that: (1) the failure models of the 3 kinds specimens including ones without joints, ones with cruciform joints and ones with intersecting parallels joints are similar to the general trend, e.g.X-shaped conjugated single slope shear failure and single-slope shear failure under compression and shear tests; (2) under uniaxial compression, the performance of intact specimen is clearly affected by its size, and the strength of jointed one is significantly affected by the weakening of the structure.This impact depends on the joints conditions,e.g.joint density, with filling material or without filling material ; (3) Deformation modulus E and Cohesion c have no significant change for the 2 kinds jointed specimens, but the internal friction angle is obviously af fected by joints and their fillings.The internal friction angle decreases rapidly with the increase of joints number.
Xinyu Liu Aihua Liu Bangbiao Wu
School of Resources and Safety Engineering, Central South University, Changsha , China; School of Ar School of Resources and Safety Engineering, Central South University, Changsha , China
国际会议
哈尔滨
英文
219-226
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）