Influence of temperature on physical and mechanical properties of a sedimentary rock: Coal measure mudstone

Determining the physical and mechanical behavior of sedimentary rocks is one most common challenges in deep rock mass engineering. Experiments were con-ducted to study properties coal measure mudstone with SEM, XRD, uniaxial compression testing. The results show that temperature has a significant effect on mudstone. presence clay minerals evaluated contributes unique characteristics seen at high temperature. experiences obvious color changes surface as rises. This mostly attributed iron-bearing minerals. Internal change caused by thermal de-composition kerogen associated As major mineral mudstone, kaolinite undergoes phase temperatures, which leads properties. From 25?C 200?C, due evaporation absorbed water from minerals, strength increases significantly. continues rise beyond this, gradually 200?C 400?C. When reaches 400?C, this was strengthened result decomposition expansion crystalline Above 600?C, dehydration ends while cracking initiates gradually, decreasing