CAJ | 학술논문

以美国Therma CAM SC3000红外热像仪为观测手段，选取含孔花岗岩进行不同水平应力下巷道岩爆模拟实验，并结合数值模拟，对岩爆过程中应力分布和红外辐射温度变化特征进行了实验研究。结果表明：1)轴向应力与水平应力比值随着水平应力的增大而减小，水平应力越高，岩爆发生的最大主应力值也相应提高。2)岩爆发生的红外前兆时空演化特征：主破裂前，孔洞左右两侧平均红外辐射温度表现为突然升温型或略降转升型，对应的破裂机制分别为压剪破裂和先张拉后压剪的复合破裂形式；主破裂沿孔洞左右两侧高温异常条带扩展。3)岩爆过程中，孔洞上、下区域增温幅度比左右两侧低，增温较为稳定，孔洞上边区域AIRT均比孔洞下边区域高。(4)水平应力越大，孔洞周围平均红外辐射温度越高。
이미국Therma CAM SC3000홍외열상의위관측수단，선취함공화강암진행불동수평응력하항도암폭모의실험，병결합수치모의，대암폭과정중응력분포화홍외복사온도변화특정진행료실험연구。결과표명：1)축향응력여수평응력비치수착수평응력적증대이감소，수평응력월고，암폭발생적최대주응력치야상응제고。2)암폭발생적홍외전조시공연화특정：주파렬전，공동좌우량측평균홍외복사온도표현위돌연승온형혹략강전승형，대응적파렬궤제분별위압전파렬화선장랍후압전적복합파렬형식；주파렬연공동좌우량측고온이상조대확전。3)암폭과정중，공동상、하구역증온폭도비좌우량측저，증온교위은정，공동상변구역AIRT균비공동하변구역고。(4)수평응력월대，공동주위평균홍외복사온도월고。
Selecting the infrared thermal imager CAM SC3000 produced by America as observation method, an experiment was carried out to simulate roadway rock burst under different horizontal stress by using the granites with hole. Combined with numerical simulation, the stress distribution and infrared radiation temperature characteristics were studied during the process of rock burst. The results show that the ratio of axial stress and horizontal stress decreases with the increase of horizontal stress, and the greater the horizontal stress is, the higher the maximum principal stress of rock burst is. The average in-frared thermal temperature (AIRT) in the left and right sides of the hole suddenly increase or slightly decrease and then transfer to increase, and the corresponding fracture mechanism is the compressive-ly-sheared fracture form and the composite form with early tensile fracture and late compressive-ly-sheared fracture. The main fracture zone extends along the high temperature abnormal stripe on the left and right sides of the hole. During the rock burst process, the increasing extent of temperature above and below the hole is lower than that in the left and right sides of the hole, that is, the temperature in-creasing extent above and below the hole is relatively stable. Meanwhile, the AIRT above the hole is higher than that below the hole. Moreover, the greater the horizontal stress is, the higher the average in-frared radiation temperature around the hole is.