Physical modeling of an underground roadway excavation in vertically stratified rock using infrared thermography

An overview of the thermography-based experimental studies on roadway excavation in stratified rock masses at CUMTB

“…The fact that infrared radiation energy varies with the change of stress field of the loaded rocks was further verified by the subsequent studies: uniaxial and biaxial loading of sedimentary rocks and igneous rocks; the structural stress fields of rock and gas burst disasters resulting in local abnormal high temperature in mine; projectile impact on rock; the roadway tunnel under plane loading and its excavation process in a physical analog model consisting of alternating layers of sandstone, mudstone and coal, inclined at 0°a nd 90°dip angles [26][27][28][42][43][44][45].…”

“…Step 6: easy to accumulate the elastic energy than the vertical strata model [27,28]. (2) The IRT profiles for the 45°inclined strata and 60°inclined strata increase piecewise with jump points [29,30]; the 45°strata model has two jump points of E 2 and E 4 , and the 60°inclined strata model has one jump point E 3 (the latter is easier to slid than the former); it is due to the sliding damage between the rock strata for the highly dipped rock layers, because the excavation status of E 2 and E 4 or E 3 are very early phase during the development of the roadway tunnel and no noticeable strains or displace were observed, the sliding between rock strata is at micro-scale inspected by the IR thermography.…”

“…This paper provides an overview of the excavation experiments and studies conducted at the CUMTB' state key laboratory since 2006, which involve excavation of an roadway tunnel in the physical analog model with layered rocks dipping at 0°, 45°, 60°, and 90°. The paper highlights the use of infrared (IR) thermography and the image processing techniques for characterization of the space-time evolution of the excavation-induced damage in horizontal strata, vertical strata, 45°inclined strata, and 60°inclined strata [27][28][29][30]. The information in this paper is supplemented with additional information in other papers in this issue.…”

Similar Physical Simulation on the Deformation of Surrounding Rocks of Floor Roadway Caused by Coal Mining Under Tectonic Stress

“…Despite people having known the existence of crustal stress for nearly a century, they still fail to master the essence of the problems and rules regarding the spatial stress field induced by underground mining. Moreover, the design of underground mining projects is usually lacking of adequate scientific bases, and numerous control and support methods of rock strata are lacking of effective means, which ultimately results in underground disasters, such as rib fall of coal walls, roadway roof fall, deformation and damage of support, coal-gas outburst, and casualty among workers [2][3][4]. The deformation and failure of the surrounding rocks of roadways are mainly the result of the strength of surrounding rocks and stress application, the strength of surrounding rocks depends on the lithological characteristics of the rocks, and the stress depends on roadway depth and geological tectonism.…”

Roadway Support Technology with Sliding Cracking Surrounding Rock under Tectonic Stress

“…Meng and Han et al, (2016) studied the dynamic pressure effect on soft rock roadway. In the aspect of inclined roadway support, He and Jia et al (2010) and He (2011) conducted physical modeling of different inclined rock roadway. Song and Lei et al (2012) studied the parameters of the surrounding gently inclined roadway.…”