Study on Numerical Simulation of Optimization of the Width of Coal Pillar in Caving Roadway at Fully-Mechanized Caving Face of Deep Mine

This paper, with some full-mechanized caving mining face of Xin Julong Coal Mine as the research object, has conducted simulation research on caving roadways with different sizes of coal pillars under the action of mining-induced stress, obtained the deformation and fracture characteristics of surrounding rock of various roadways, and determined the reasonable coal pillar width of caving roadway to be 4m. The width 4m ensures to reduce the damage of mine pressure to roadway in the stope lateral internal stress, improves the stability of surrounding rock of roadway, and is of great significance to ensuring efficient, safe production of mine, and provides a reference for mines with other similar geological conditions.