Scale model test of highway tunnel construction underlying mined-out thin coal seam

Study on the movement characteristics of the overlying stratum and surrounding rock control in ultraclose coal seams: A case study

“…With the increasing intensity of coal mining, coal seams with favorable geological structure and shallow depths are diminishing continuously. In recent years, miners have had to overcome the challenge of coal extraction from close‐distance coal seams at many mining regions . A number of studies have already been performed to resolve the issues encountered during the mining of close‐distance coal seams.…”

“…In recent years, miners have had to overcome the challenge of coal extraction from close-distance coal seams at many mining regions. [8][9][10][11][12][13][14] A number of studies have already been performed to resolve the issues encountered during the mining of close-distance coal seams. In these studies, the thickness of strata between close-distance coal seams is over 8 m. The numerical calculation is a commonly used method to study the stress distribution law and rock movement in close-distance coal seams (Table 1).…”

A cavity expansion–based solution for interpretation of CPTu data in soils under partially drained conditions

“…As reported by Yu, cavity expansion methods in Geomaterials have been developed since 1950s, and their wide implications lead to the cavity expansion theory as a useful and simple tool for modelling many complex geotechnical problems, including in situ soil testing (eg, Ahmadi and Dariani; Mo et al; Vali et al) and tunnelling (eg, Yang et al; Fang; et al Mo and Yu; Wang et al). Numerous analytical and numerical solutions have been proposed using increasingly sophisticated constitutive soil models by applying the principles of continuum mechanics .…”

“…Dislocation-based methods initially proposed by Elsworth 31 provided an alternative approximate method to accommodate the fluid pressure dissipation under partially drained conditions, while a pseudo-elastic material was assumed together with an incompressible flow field and a stress-decouple solution was employed to note the influence of soil rigidity to the penetration rate responses. 32 As reported by Yu, 33 cavity expansion methods in Geomaterials have been developed since 1950s, 34,35 and their wide implications lead to the cavity expansion theory as a useful and simple tool for modelling many complex geotechnical problems, including in situ soil testing (eg, Ahmadi and Dariani; 36 Mo et al; 37 Vali et al 38 ) and tunnelling (eg, Yang et al; 39 Fang; et al 40 Mo and Yu; 41 Wang et al 42 ). Numerous analytical and numerical solutions have been proposed using increasingly sophisticated constitutive soil models by applying the principles of continuum mechanics.…”

Influence Analysis of Underground Excavation on the Adjacent Buildings and Surrounding Soil Based on Scale Model Test

“…In the previous research, Sawwaf and Nazir [10] have analyzed the results of laboratory model tests on the influence of deep excavation-induced lateral soil movements on the behavior of a model strip footing adjacent to the excavation and discussed the variation of the footing measured vertical settlements with different parameters. Fang et al [11] conducted physical model tests of highway tunnel construction and examined the stability of the surrounding rocks regarding different caved zone-tunnel distance and dip angles of the coal seam. Yang et al [12] have investigated the mechanical behavior of a typical jointed rock block located adjacent to an underground excavation by comparing the failure modes of the numerical simulations with the corresponding experimental physical jointed block test results.…”