TY - JOUR
TI - Study on stress manifestation and overlying strata movement laws under different lithological combinations
AU - Li Li
JN - Thermal Science
PY - 2025
VL - 29
IS - 2
SP - 1107
EP - 1113
PT - Article
AB - To gain insights into the impact of lithological and geometric configurations  of Shendong strata on the propagation of damage within overlying rock  layers, a model simulating overlying rock movement and damage propagation  under varied lithological combinations was developed. The study involved  four physical and seventeen numerical simulations to assess geological  factors influencing strata be­havior post-mining. Key findings include:  Decreasing the thickness of the key stra­tum reduces the first weighting  interval, accelerates fracture initiation, enlarges the subsidence area, and  increases maximum subsidence; Raising the key stratum elevation diminishes  both subsidence and its range, while delaying fracture initi­ation; Reducing  mining thickness results in smaller pressure fluctuations, slightly extends  the first weighting interval, and decreases both subsidence and its range;  Enhancing key stratum hardness delays fracture occurrence, lowers the  fracture zone height, and decreases the plastic zone volume.