CAJ | 학술논문

为了研究综采工作面推进速度对顶板岩层活动的影响规律，以神东矿区上湾煤矿煤层赋存条件及开采参数为研究背景，运用FLAC3D模拟软件，对工作面不同推进速度条件下顶板岩层的应力场、塑性破坏区以及位移场进行了数值模拟；并提取了监测单元的应力值，分析了不同推进速度时顶板岩层的活动情况。结果表明，当推进速度由12 m／d减小为3 m／d时，煤壁处工作面中部顶板岩层的垂直应力由8.85 M Pa 增加到9.63 M Pa ，煤壁前10 m 处由17.27 M Pa 增加到20.02 M Pa ；顶板岩层的最大破坏高度由7.53 m 增大到12.61 m ；顶板岩层的最大下沉量也增加19％；推进速度的减小导致顶板岩层活动频繁，煤层顶板稳定性降低。此研究结果为采场顶板的科学控制和管理提供了理论依据。
위료연구종채공작면추진속도대정판암층활동적영향규률，이신동광구상만매광매층부존조건급개채삼수위연구배경，운용FLAC3D모의연건，대공작면불동추진속도조건하정판암층적응력장、소성파배구이급위이장진행료수치모의；병제취료감측단원적응력치，분석료불동추진속도시정판암층적활동정황。결과표명，당추진속도유12 m／d감소위3 m／d시，매벽처공작면중부정판암층적수직응력유8.85 M Pa 증가도9.63 M Pa ，매벽전10 m 처유17.27 M Pa 증가도20.02 M Pa ；정판암층적최대파배고도유7.53 m 증대도12.61 m ；정판암층적최대하침량야증가19％；추진속도적감소도치정판암층활동빈번，매층정판은정성강저。차연구결과위채장정판적과학공제화관리제공료이론의거。
In order to investigate the influence law of mining velocity on the roof strata at a fully mechanized mining face , taking the occurrence conditions and mining parameters of coal seam of Shendong mining area Shangwan Coal Mine as research background ,the numerical simu‐lation calculation of coal face at different mining velocity was conducted on stress field ,plastic failure zone and displacement field of roof strata by FLAC 3D simulation software ,the stress value of monitoring unit was extracted and the activity condition of roof strata at different velocity was analyzed .The results show that when the mining velocity reduced from 12 m/d to 3 m/d ,the ver‐tical stress of roof strata on coal wall in the middle of working face increased from 8.85 MPa to 9.63 MPa ,the value at pre‐wall 10 m increased from 17.27 MPa to 20.02 MPa;the maximum damage height of roof strata increased from 7.53 m to 12.61 m ;the maximum squat increased by 19% .T he decreases of mining velocity make the roof strata move frequently and the stability of coal seam roof reduce .These results provide theory basis for scientific control and safe mining of stope roof .