Analysis of borehole stratigraphy combined geomechanical model with field monitoring methods to determine displacement angles in Seam I (12) of the Mong Duong coal mine

Tóm tắt

This study determines displacement angles in Seam I (12) of the Mong Duong coal mine using an integrated approach combining borehole stratigraphy, mechanical modeling, and field monitoring. Key parameters, including geological conditions, compressive and tensile strength, and internal friction angle, were analyzed to estimate displacement angles using the similar region theory. A geomechanical model incorporating elastic modulus, geological strength indices, and cohesion force was developed to calculate displacement and deformation angles. Surface monitoring station provided real-time field data for validation. The results show that the displacement angles of β = 42° from field data, β = 47° from the geomechanical model, and β = 50° from borehole analysis. These findings offer valuable insights for improving mining safety and optimizing underground operations in similar geological conditions. The combination of methods shows the best effect for mines without monitoring stations, the borehole stratigraphic analysis method can be applied and then the same area method can be applied to determine the deformation displacement angle for safe and effective exploitation