Failure mechanism and stability control of a large section of very soft roadway surrounding rock shear slip

Computational method of large deformation and its application in deep mining tunnel

“…The ground stress of the deep rock mass has a significant impact on the underground projects of weak surrounding rock (e.g., deep mining roadway, railway and highway tunnels, etc.) (Paterson and Olgaard, 2000;Meng et al, 2013;Yang et al, 2013;Zhou et al, 2014). For example, the Austria's Tauern tunnel is at a depth of 600-1000 m. The in situ ground stress is 16-27 MPa, the lateral pressure coefficient is around 1.0, and the tension-compression ratio of the surrounding rock is 0.05-0.06.…”

Bolt-grouting combined support technology in deep soft rock roadway

“…Therefore, the boltgrouting combined support effectively maintains the long-term stability and safety of roadways [6][7][8][9][10][11][12][13]. Based on on-site practices, the failure mechanism in deep soft rock roadways is studied by analyzing the mineral composition in surrounding rock, testing of rock mechanical properties and ground stress.…”

Effect of bolting on roadway support in extremely weak rock

“…In most control measures, bolting in surrounding rock was used to better effect (Guo et al 2012; Wang et al 2012; Meng et al 2013; Kang et al 2015; Sun and Wang 2011; Wang et al 2015; Yuan et al 2014; Yu et al 2015; Zhao et al 2015). Since the surrounding rock was treated as a whole structure, bolts in the floor not only played a role in controlling floor heave, but also played a role in reinforcing roof and two sides.…”