水岩耦合巷道掌子面破裂的红外时空演化特征

发布时间：2018-05-29 03:28

本文选题：巷道掌子面 + 破裂　；参考：《矿业研究与开发》2016年02期

【摘要】：利用红外热像仪进行无水、无压水、承压水作用下石灰岩双轴加载破裂失稳观测实验,研究巷道掘进时掌子面破裂过程中的红外辐射时空演化规律,以此识别掘进方向的水体情况。实验结果表明:掘进前方不含水体时,掌子面破裂在时序上表现为温度线性升高,破裂前升温加速,在空间上表现为前期均匀升温,临近破裂前出现温度场分异,形成局部高温区,升温加速;掘进前方存在无压水时,温度曲线呈"一级台阶"状上升,热像表现为高温场包围低温场;掘进前方存在承压水时,温度曲线呈"波浪"状上升,热像交替升降温,最终大幅度降温。研究结果可为巷道开挖的遥感观测及巷道渗漏水预测提供理论指导。
[Abstract]:The infrared thermal imager is used to observe the instability of limestone under biaxial loading under the action of anhydrous, pressureless water and pressurized water. The temporal and spatial evolution of infrared radiation during tunneling is studied. This is used to identify the direction of the heading of the water situation. The experimental results show that when there is no water in front of tunneling, the fracture of palm surface shows linear rise of temperature in time series, acceleration of temperature before rupture, uniform temperature rise of early stage in space, and difference of temperature field near rupture. Forming a local high temperature area and accelerating the temperature rise; when there is no pressure water in front of the excavation, the temperature curve rises in the form of "first step", the thermal image shows that the high temperature field surrounds the low temperature field, and when there is confined water in the front of the excavation, the temperature curve rises in the form of "wave". Thermal images alternately rise and cool down, and eventually a large amount of cooling. The results can provide theoretical guidance for remote sensing observation of tunnel excavation and prediction of tunnel leakage.
【作者单位】：华北理工大学矿业工程学院;河北省矿业开发与安全技术重点实验室;
【基金】：国家自然科学基金资助项目(51374088,51174071,51574102) 河北省自然科学基金资助项目(E2012209047)
【分类号】：TD322;TD745

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