关键词: 连续采煤机块段式开采, 完全垮落法, 数值模拟, 履带行走式液压支架

Abstract: With the corner coal mining conditions in Wulanmulun Coalmine of Shendong Company as the engineering background, mining pressure characteristics under technological conditions of blocking mining by the continuous miner is researched numerically through the software of FLAC3D finite difference combined with on-the-spot pressure observation. The research finds that the use of complete management of roof caving method will, as the working face advances, make the gob area expand unceasingly, and thus the peak stress and stress of coal pillar between knife caving change drastically, with the stress concentration factor ranging from 2.2~2.7, and that the maximum vertical displacement position of the direct roof in the mined-out area will extend towards mining, which causes abscission layer of the direct roof off the main roof. The abscission layer becomes larger and larger and will collapse extensively in the triangular area formed by the headway and the roadway.

Key words: block section of continuous miner, the fully caving method of roof, numerical simulation, crawler walking type hydraulic support