CAJ | 학술논문

为了研究煤层开采对覆岩含水层的破坏机理，采用岩石破裂过程流固耦合分析系统UDEC-Flow，根据老三沟井田6煤工作面地质条件，对覆岩含水层（砂砾岩、细砾岩和粗砂岩含水层）的破坏过程进行数值模拟。模拟结果显示，随着工作面的推进，裂隙不断向上发育，直接顶、基本顶的相继破断和垮落导致了导水裂隙的形成；同时随着工作面的推进，先前生成的一些裂隙出现了闭合，而工作面附近又产生新的裂隙。以6煤为例，对上覆含水层的保水开采难度进行分级，并提出了相应的保水开采技术，如加快工作面推进速度、注浆加固、降低采高、充填开采及部分开采等，将指导6煤开采时覆岩含水层保护，对同类开采地质条件下的矿井有较好的指导借鉴意义。
위료연구매층개채대복암함수층적파배궤리，채용암석파렬과정류고우합분석계통UDEC-Flow，근거로삼구정전6매공작면지질조건，대복암함수층（사력암、세력암화조사암함수층）적파배과정진행수치모의。모의결과현시，수착공작면적추진，렬극불단향상발육，직접정、기본정적상계파단화과락도치료도수렬극적형성；동시수착공작면적추진，선전생성적일사렬극출현료폐합，이공작면부근우산생신적렬극。이6매위례，대상복함수층적보수개채난도진행분급，병제출료상응적보수개채기술，여가쾌공작면추진속도、주장가고、강저채고、충전개채급부분개채등，장지도6매개채시복암함수층보호，대동류개채지질조건하적광정유교호적지도차감의의。
In order to study the damage mechanism of overburden rock aquifer after coal mining ,utilized the fluid-solid coupling analysis system UDEC-Flow of the damage process with rock ,according to the geological conditions of working face of the No .6 coal seam in LaoSan-gou coalmine ,the damage process of the overburden rock aquifer (the aquifer of glutenite ,fine conglomerate and coarse sandstone ) was analyzed by numerical simulation method .The simulation results show that the crack keep continuously up growth with the working face advancing ,the successively breaking and caving of the immediate roof and basic roof led to the formation of water flowing fracture ;simultaneously with the face advancing , the previously generated cracks appeared closed ,and near the working face generated new cracks again .Taking the No .6 coal seam for instance , the difficulty of protecting aquifer was graded , and proposed the protection technology of overburden rock aquifer , Such as speed up the working face advancing , grouting reinforcement ,reducing the mining height , Filling mining and technical of partial mining and so on . Research resluts could provide references for the No .6 coal seam and coalmining with the same geological conditions .