Rock bolts have been widely used as rock reinforcing members in underground coal mine
roadways and tunnels. Failures of rock bolts occur as a result of overloading, corrosion …

Rock bolts are one of the most effective and conventional support techniques widely used in
underground mining and tunneling operations to stabilize excavations and jointed rock …

Cracking and crushing were observed in the first tunnel lining of the Kaidagu double-arch
tunnel (China), excavated in weathered surrounding rock. This concrete damage occurred …

Brillouin optical time domain reflectometry (BOTDR), a fully-distributed optical fiber sensing
technology, was applied to monitoring the deformation behavior of overlying strata during …

Rock bolts are the devices that used to reinforce the rock masses in mining tunnels and
underground excavation structures. The loading level of the rock bolt indicates the …

Brillouin Optical Frequency Domain Analysis (BOFDA) is a distributed fiber optic sensing
(DFOS) technique that has unique advantages for performance monitoring of piles …

Large-scale mining fractures resulting from repeated mining are a major cause of surface
water loss in the northern Shaanxi mining area, China. Accurately detecting the evolution of …

The piezoelectric active sensing method has been proven to be an effective, nondestructive
approach for bolt looseness monitoring. The conventional damage index relies on the …

Due to the loss of preload, structural failure caused by bolt loosening is common in
engineering structures. Effective monitoring of bolted connections is of great importance in …

原生地质体在煤岩层采掘条件下将发生变形破坏, 相关物理属性(应变场, 渗流场, 化学场, 温度场,
地球物理场) 随之改变, 为了对变形破坏机理进行精细化分析需对场源特征进行重构反演, 因此 …