Study on Large Mining Width Strip Mining Method for Extra Thick Coal Seam in Cedi Town

Abstract

To realize reasonable and safe mining of coal resources under Cedi Town, taking the under-construction mining of Cedi Coal Mine as the research background, the distribution, quantity, structure and type of surface buildings of under-construction mining are defined by field investigation and theoretical calculation of strip mining parameters, and the design scheme of large-width strip mining with leaving 70 m and mining with of 50 m is determined. Through probability integral method and FLAC3D numerical simulation calculation, the mining design of the strip is verified. The results show that the maximum surface subsidence value is 210 mm, the surface horizontal deformation value is -1.0 mm/m to 1.5 mm/m, and the damage of the surface buildings is less than the first level damage, which meets the requirements of protecting the surface buildings, and can realize continuous advancing for working faces 02, 04 to promote safe mining.

Keywords

• coal mining under buildings
• large mining width
• strip mining
• mathematical simulation
• probability integration