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通过对无水、无压水、承压水作用下花岗岩加载破裂失稳实验进行红外监测,研究花岗岩破裂及突水过程中红外辐射时空演化特征,以此实现对巷道掌子面破裂及突水灾害的监测和预报。实验结果表明:掌子面前方不含水体时,时序特征表现为前期线性升温,破裂前升温加速;空间上表现为破裂前高温区包围低温区。含无压水体时,时序上表现为温度曲线呈锯齿状;空间上表现为高、中、低温度区域划分,高温场破裂。含承压水体时,时序上表现为红外曲线呈升、降温交替变化,空间上表现为温度大幅度降低,呈现破裂低温场。利用红外监测技术,从时空特征角度综合分析,提取花岗岩巷道破裂及突水的前兆信息,可以降低实际工程中巷道突水事故的发生。
Through the infrared monitoring of granite loading rupture instability experiment under the condition of no water, no pressure water and pressure water, the temporal and spatial evolution characteristics of granite rupture and infrared radiation in the process of water inrush were researched, and the fractures and water inrush Disaster monitoring and forecasting. The experimental results show that when the water is not in front of the face, the time series features linear warming in the early stage and accelerated warming up before the rupture. The spatial characteristics are that the high temperature zone before rupture surrounds the low temperature zone. In the case of non-pressurized water body, the temperature curve appears jagged in time sequence. The spatial distribution is divided into high, medium and low temperature regions, and the high temperature field ruptures. When the confined water body is covered, the infrared curve appears ascending on the time sequence, and the temperature changes alternately. The temperature shows a sharp decrease in temperature and shows a ruptured low temperature field. Using infrared monitoring technology, comprehensive analysis from the perspective of spatio-temporal features, extraction of granite tunnel rupture and water intrusion precursory information, can reduce the actual project of roadway water inrush accidents.