CAJ | 학술논문

采用FLAC模拟分析的方法,对某矿红土层中巷道采用底拱和反底拱2种不同支护方式下围岩力学行为进行了研究,系统分析了不同支护方式下围岩应力、位移及塑性区的变化情况。研究结果表明：采用反底拱进行硐室支护后,硐室底鼓量为50 mm,顶板监测点下沉量为50 mm,均为采用底拱支护技术的1/9左右；底板的垂直流变速度为8.64 mm/d,为采用底拱支护技术的1/3；最大应力明显降低。反底拱支护显著提高了围岩的强度和承载能力,有效地控制了软岩巷道的底板变形膨胀。
채용FLAC모의분석적방법,대모광홍토층중항도채용저공화반저공2충불동지호방식하위암역학행위진행료연구,계통분석료불동지호방식하위암응력、위이급소성구적변화정황。연구결과표명：채용반저공진행동실지호후,동실저고량위50 mm,정판감측점하침량위50 mm,균위채용저공지호기술적1/9좌우；저판적수직류변속도위8.64 mm/d,위채용저공지호기술적1/3；최대응력명현강저。반저공지호현저제고료위암적강도화승재능력,유효지공제료연암항도적저판변형팽창。
In this paper, study was made on the mechanical behavior of surrounding rock of the roadway in red soil with two different support patterns of floor arch and inverted arch in a mine by using FLAC simulation analysis method, and the systematic analysis was carried out on the change of the stress, displacement and plastic zone of surrounding rock in different support patterns. The research results showed that the deformation of floor heave was 50mm after the inverted arch support pattern was adopted for the roadway and the roof convergence at the monitoring point was 50mm, which were all about one-ninth of that with floor arch support pattern;the vertical rheological rate of floor was 8. 64mm/d, which was one-third of that with floor arch support pattern;and the maximum stress decreased significantly. The application of inverted arch support technology greatly improved the strength and load-carrying ability of the surrounding rock and made the floor deformation and expansion of the roadway in soft rock under effective control.