- 期刊
Mechanical Behavior of Rock Developed of Stratified in Rock Fissure
摘要
Water‐rock interaction has a great influence on the mechanical properties of rock and the degree of fracture development, among which the key problems are the difference of the influence of different types of water‐chemical solutions and the damage degree of the stability of thin layered mudstone. The acidity and alkalinity of rock fissure water will affect the development degree of fissure, the strength of water‐rock chemical reaction and the weakening of rock mechanical properties.In this paper, the thin‐layered mudstone collected from the roof of the 1901 working face of Xintian Coal Mine in Qianxi City, Guizhou Province is taken as the research object. The mineral composition was analyzed by diffraction analysis,the dynamic immersion experiments of pH=5, pH=7 and pH=9 solutions were carried out, and the change characteristics of mineral particles and rock fissure development were observed under a microscope of 500 times, and the principle of water‐rock chemical interaction and the reason of fissure change were analyzed. After soaking, the circular arc tensile test was carried out to measure the strain rate and tensile strength, observe the deflection Angle of the tensile crack, compare the difference of experimental data and analyze the reasons.