The Numerical Simulation Research Based On FLAC3D For Mining Subsidence

There is a growing demand for energy with the rapid development of Chinese economy, especially coal resources. The original rock stress of mining area will happen very big change after coal is digged out, the surface appear movement and deformation When the change of the stress beyond a certain range, This will bring huge to social and environmental problems. Consequently the research of mining subsidence is particularly important and master the surface subsidence rule can the quantitative appropriate measures to prevent the harmful effects.This paper introduce the basic situation and geological data of working face of gubei mining. Based on geological data of gubei mining and the program will be imported into FLAC3D numerical simulation experiment was carried out in the simulation software. To obtain the regular of mine surface movement deformation under the influence of different mining progress, different mining thickness and different angle, regulars are as follows:1. The influence of mining progress:As the working face advancing, the maximum subsidence value and horizontal movement value of the surface increase, mined-out area is continuously expanding, the point of the maximum subsidence value is located above mined-out area and centering on the maximum subsidence value symmetry of toward the direction. Maximum subsidence value present symmetry of mined-out area of inclination direction2. The influence of mining thickness:Along with the mining thickness increasing, the maximum subsidence value of straight direction increasing and the horizontal displacement value is also increasing. The influence of subsidence on the surface remain unchanged basically.3. The influence of mining angle:Along with the mining angle increasing, the maximum subsidence value of inclination direction are decreasing and the point of maximum subsidence value is not located in the central of mined-out area. The horizontal displacement values are decreasing of the direction of up and the horizontal displacement values are increasing of the direction of down...