CAJ | 학술논문

摘要为研究不同采出率开采条件下条带开采煤柱的稳定性及对地表的影响，采用了FLAC^3D和Tecplot数值模拟软件，对不同采留宽条带煤柱的竖直应力分布和地表最大下沉值进行研究。结果表明：随着采出率的增加，煤柱单位面积所支撑的压力成线性增大；在煤柱的边缘形成应力的集中区，其应力等值线的形状呈马鞍形-平台形-拱形的变化，平台形可以看成煤柱从稳定向失稳过度的标志和临界点；根据模拟计算结果，建立了地表最大下沉值与条带开采回采率之间的关系式及最大竖直应力与采出率之间的关系式，为今后相关计算提供了科学依据。
적요위연구불동채출솔개채조건하조대개채매주적은정성급대지표적영향，채용료FLAC^3D화Tecplot수치모의연건，대불동채류관조대매주적수직응력분포화지표최대하침치진행연구。결과표명：수착채출솔적증가，매주단위면적소지탱적압력성선성증대；재매주적변연형성응력적집중구，기응력등치선적형상정마안형-평태형-공형적변화，평태형가이간성매주종은정향실은과도적표지화림계점；근거모의계산결과，건립료지표최대하침치여조대개채회채솔지간적관계식급최대수직응력여채출솔지간적관계식，위금후상관계산제공료과학의거。
To study the stability of strip mining coal pillar and influence to surface under the condi- tion of different recovery coefficient, numerical simulation software FLAC^3D and Tecplot were adopted, vertical stress distribution of different mining and pillar width strip coal pillar and maximum surface sub- sidence were studied. The results indicated： sustentive pressure of coal pillar per unit area presented lin- ear increase with the increase of recovery coefficient ; shape of stress isoline of stress concentration area at edge of coal pillar presented changes from saddle to platform shaped than arched, platform shaped could be judged as the mark and critical point from stability to instability of coal pillar; formula between maxi- mum surface subsidence and strip mining stoping rate and formula between maximum vertical stress and recovery coefficient were established based on simulation calculation results, provided scientific basis for relative calculation in future.