CAJ | 학술논문

以神东公司乌兰木伦煤矿边角煤开采条件为工程背景，采用FLAC3D有限差分软件计算研究了连续采煤机块段式开采工艺条件下的采场矿压特征，并进行了现场矿压观测。研究表明：采用完全垮落法管理顶板时，随着工作面推进，采空区面积不断扩大，刀间煤柱压力峰值越大且其应力变化剧烈，应力集中系数在2.2～2.7范围；采空区直接顶最大垂直位移位置向回采方向延伸，直接顶与老顶逐步产生了离层，且离层量越来越大，并在支巷与联巷的交叉位置形成的三角区域进行大面积垮落。
이신동공사오란목륜매광변각매개채조건위공정배경，채용FLAC3D유한차분연건계산연구료련속채매궤괴단식개채공예조건하적채장광압특정，병진행료현장광압관측。연구표명：채용완전과락법관리정판시，수착공작면추진，채공구면적불단확대，도간매주압력봉치월대차기응력변화극렬，응력집중계수재2.2～2.7범위；채공구직접정최대수직위이위치향회채방향연신，직접정여로정축보산생료리층，차리층량월래월대，병재지항여련항적교차위치형성적삼각구역진행대면적과락。
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.