CAJ | 학술논문

以某矿为工程背景，根据深部软岩巷道可能存在的地应力场类型和巷道轴向角度α(轴向与最大水平主应力的夹角)，设计出105组数值模拟方案，研究了深部软岩巷道围岩稳定性随轴向、径向侧压系数(λy，λx)及巷道轴向角度(α)变化的规律，研究了侧压系数因子Nλn和轴向角度因子Nα对巷道围岩稳定性的影响权重。研究结果表明：深部软岩巷道布置的合理轴向角度(α)并非只沿最大水平主应力方向布置时才最有利于巷道的稳定，而与巷道所处的具体地应力场有关；当巷道轴向与水平主应力方向不平行时，可将更靠近巷道轴向的水平主应力视为轴向应力，将另外一个水平主应力视为径向应力。
이모광위공정배경，근거심부연암항도가능존재적지응력장류형화항도축향각도α(축향여최대수평주응력적협각)，설계출105조수치모의방안，연구료심부연암항도위암은정성수축향、경향측압계수(λy，λx)급항도축향각도(α)변화적규률，연구료측압계수인자Nλn화축향각도인자Nα대항도위암은정성적영향권중。연구결과표명：심부연암항도포치적합리축향각도(α)병비지연최대수평주응력방향포치시재최유리우항도적은정，이여항도소처적구체지응력장유관；당항도축향여수평주응력방향불평행시，가장경고근항도축향적수평주응력시위축향응력，장령외일개수평주응력시위경향응력。
Taking some mine as the engineering background, the 105 groups of numerical simulation project have been designed according to the possible existence of ground stress type of deep soft rock roadway and to the angle alpha which represents the numerical value between roadway axis and the di-rection of maximum horizontal principal stress. The law of the stability of surrounding rock of deep soft rock tunnel excavation, changing along the coefficient of axial and radial lateral pressure coefficient (λy,λx) and the angle of the roadway axial (α), has been studied. Besides, both the weight of Nλn that stands for the factor of lateral pressure coefficient and Nαthat represents the factor of axial angle in complex stress field have been studied. The results have shown that the suitable axial angle for the layout of roadway is related to the type of stress field, and that not only laying along the maximum horizontal principal stress is the most conducive to the stability of roadway surrounding rock; When the axis of roadway in deep rock does not parallel with the direction of horizontal principal stress, the horizontal principal stress (be it the maximum or the minimum) that is closer to the axis of roadway could be re-garded as the axial stress, while the other horizontal principal stress could be taken as the radial stress.