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为研究水对岩爆发生的影响,采用自然与饱水花岗岩进行岩爆模拟实验,以美国Therma CAM SC3000红外热像仪为观测手段,研究了水对花岗岩巷道岩爆红外辐射特征的影响.结果表明:饱和花岗岩AIRT初始阶段温度上升速度快;岩爆发生前饱和岩样最高、最低温度均有微小突变,饱和岩样的岩爆前兆特征更易捕捉.岩爆瞬间,自然岩样孔洞左右两侧AIRT突然升高,岩样表面最低温度曲线呈线性上升,而饱和岩样AIRT和最低温度曲线均下降;饱和花岗岩AIRT平均值比自然花岗岩高,并且单位载荷下AIRT增量更大;趋近岩爆发生,花岗岩红外辐射温度表现出临界慢化特征,系统内在变化速率降低,与前一时刻状态越来越相似,其自相关系数转向增大的趋势,这可以作为岩爆发生的前兆特征.
In order to study the effect of water on rock burst, the natural rock experiment with saturated granite was used to study the effect of water on the infrared radiation characteristics of rock blast in granite roadway with Therma CAM SC3000 infrared camera as the observation method. The results show that the initial temperature of the saturated granite AIRT increases rapidly, the saturation rock samples have the highest and lowest temperature before the rockburst, and the rock burst precursory characteristics of the saturated rock samples are more easily captured.At the moment of rockburst, the left and right airlocks of natural rock samples Suddenly increased, the minimum temperature curve of rock samples increased linearly, while the saturated rock samples showed a decrease in both AIRT and minimum temperature curves. The average values of AIRT in saturated granite were higher than that of natural granite and the increment of AIRT was greater under unit load. Occurred, the granite infrared radiation temperature showed a critical slowing characteristics, the system of intrinsic rate of change decreases, and more and more similar to the previous state, the autocorrelation coefficient tends to increase, which can be used as a precursor to rock burst characteristics.