试件尺寸效应对岩板破坏形态影响的实验研究

Experimental Reasearch on the Size Effect on the Failure Mode of Rock Plant

板块理论在地层构造中已经成为公认的事实,国内外大量研究证明尺寸效应对岩石的力学性质存在明显的影响。目前在研究岩石的物理力学性质时多采用圆柱形或棱柱形试件,基于地层的实际构造,本研究采用板状岩石试件进行研究。实验结果表明,试件尺寸是影响试件破坏形态的关键因素;试件尺寸不同,破坏过程中的能量释放方式不同,最终导致试件破坏形态不同。本研究为进一步研究岩体力学性质及地层运动规律提供新思路。

Plate theory has become a recognized fact in the stratigraphic structure. A large number of studies have demonstrated that the size effect has significant effect on the mechanical properties of the rock. In？the present？studies, cylindrical or prismatic specimens are always used to study the physico-mechanieal properties of the rock. Based on the practical structure of the formation, platy rock specimens are used in this study. The test result showed that the size of the specimen was the key factor in the failure mode of the specimen. When the specimen size was different, the energy resleased in different ways during the failure of the specimen, and the specimen damaged in different ways. This study provides new idea for the furture study of the mechanical properties of the rock mass and the motion laws of the strata movement.