CAJ | 학술논문

结合某矿井实际地质条件,运用数值模拟软件FLAC3D建立含断层的数值计算模型,分析研究了在不同宽度的断层保护煤柱和不同宽度的工作面相互组合条件下的围岩的塑性破坏情况。当煤柱宽度为60 m时,随着工作面宽度的增加,围岩塑性破坏区一直增大,在靠近断层一侧的顶板岩层塑性破坏较明显,这主要是由于断层周围的岩石比较破碎,围岩强度较低造成的。根据研究结果,确定断层保护煤柱的合理宽度为60 m,工作面的合理宽度为75 m,为断层周围煤层的安全回采提供了一定的科学依据。
결합모광정실제지질조건,운용수치모의연건FLAC3D건립함단층적수치계산모형,분석연구료재불동관도적단층보호매주화불동관도적공작면상호조합조건하적위암적소성파배정황。당매주관도위60 m시,수착공작면관도적증가,위암소성파배구일직증대,재고근단층일측적정판암층소성파배교명현,저주요시유우단층주위적암석비교파쇄,위암강도교저조성적。근거연구결과,학정단층보호매주적합리관도위60 m,공작면적합리관도위75 m,위단층주위매층적안전회채제공료일정적과학의거。
In this paper, a mathematical model containing faults was built according to the actual geologic condition of a mine and by using the numerical simulation software FLAC3D , and analysis was carried out on the plastic deformation failure of surrounding rocks under the combination conditions of both the fault protection coal pillars and working faces with different width. When the width of the coal pillar was 60 m, the plastic failure zone of the surrounding rock was increased with the increase of the width of the working face, the plastic failure of the roof rock strata near the fault became obvious, this was mainly caused by the broken surrounding rock and its low strength. On the basis of the research results, the rational width of the fault protection coal pillar was fixed as 60 m and that of the working face was fixed as 75 m, which thus provided a certain scientific basis for the safe mining of the coal seams around the faults.