Abstract
Influence Mechanism of Main Roof Height on Surrounding Rock Stability of Gob-Side Entry Driving
Highlights
In recent years, numerous mining areas in China have encountered resource depletion and tension of the working faces with the increase in the intensity of coal resources
This study examines a core problem in the influence mechanism of main roof height on the surrounding rock stability of gob-side entry driving and aims to establish the foundation for further numerical analysis and engineering practice
The basic numerical simulation model was established based on the geological conditions of the 8105 working face of the Yanjiahe Coal Mine, which was used to conduct a quantitative analysis of the stress and displacement distribution characteristics of the surrounding rock of gob-side entry driving under different main roof heights by Universal Distinct Element Code (UDEC)
Summary
Numerous mining areas in China have encountered resource depletion and tension of the working faces with the increase in the intensity of coal resources. In the preceding studies mentioned, mechanical models are not established according to different geological conditions, and Fast Lagrangian Analysis of Continua (FLAC) [14, 15] and Universal Distinct Element Code (UDEC) [16,17,18] are used to quantitatively analyze the stress and strain distribution characteristics of surrounding rock. The effect of main roof height on the stress conditions of key rock block B was qualitatively analyzed by establishing a mechanical model of the surrounding rock of gob-side entry driving in a fully-mechanized topcoal caving working face. The basic numerical simulation model was established based on the geological conditions of the 8105 working face of the Yanjiahe Coal Mine, which was used to conduct a quantitative analysis of the stress and displacement distribution characteristics of the surrounding rock of gob-side entry driving under different main roof heights by UDEC.
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