Numerical Modeling Analysis of Nanocomposite Jute Geotextile as a Reinforcement Material for Enhancing Stability of Open-Cast Coal Mine Overburden Dump Slopes

The escalating energy demand in India has led to increased coal extraction through open-cast mining, resulting in the generation of substantial amounts of overburden material. However, the dumping of this material presents challenges, such as slope instability and ground space coverage due to the high stripping ratio prevalent in Indian coal mines. To address these issues, this study evaluates the effectiveness of nanocomposite jute-geotextile (JGT) as a reinforcement material for enhancing the slope angle of overburden dumps. Physicochemical properties of both JGT and overburden material were determined through a comprehensive series of tests. Subsequently, numerical modeling using PLAXIS 3D software was performed to evaluate the safety factor of slopes with heights ranging from 60 to 75 m and slope angles between 38° and 40°. The results demonstrate that the utilization of nanocomposite JGT significantly increases the safety factor from 1.39 to 1.55, enabling enhanced overburden dumping within a limited space. Furthermore, strength biodegradation tests reveal the material’s durability even under low pH and water-submerged conditions, emphasizing its sustainability. This study highlights the potential of nanocomposite JGT as a viable reinforcement material for improving slope stability in open-cast coal mines, thereby mitigating hazards and facilitating safe and sustainable overburden dumping. Through numerical modeling analysis, it provides valuable insights into the practical application of JGT, contributing to the advancement of slope engineering in the mining industry.