https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 1-D consolidation of a single soil layer with depth-dependent stress by multi-stage loading https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:23190 Wed 24 Aug 2016 16:40:36 AEST ]]> A new mixed-mode fracture criterion of anisotropic rock https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:46704 KI(0) and KII(0), in order to calculate the SIFs on arbitrary crack plane, KI(θ) and KII(θ). Prediction results show that under the pure tension, pure shear and tension-shear loads applied onto the original plane, Mode I fracture can occur on the sedimentary plane or on the plane of KI(θ)max. Mode I or Mode II fracture can occur under compression-shear load. The semi-circular bend (SCB) test results of anisotropic shale specimens with different ψ (crack inclined angle) and β (sedimentary plane angle) are in good agreement with the predicted results and can verify the validity of the modified K-ratio criterion.]]> Tue 29 Nov 2022 10:10:38 AEDT ]]> Factors affecting the leaching behaviours of magnesium phosphate cement-stabilised/solidified Pb-contaminated soil, part 1: water-to-solid ratio and Pb concentration https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42873 Tue 06 Sep 2022 09:59:21 AEST ]]> Comparisons of evaluation factors and application effects of the new [BQ]GSI system with international rock mass classification systems https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:31146 V) are taken into account to access the basic BQ value. However, The KV was usually measured by an indirect acoustic wave approach which often cannot reflected the actual conditions. In this study, a direct measured parameter K GSI is recommended to obtain by means of the GSI system to replace the original KV, and a new method [BQ]GSI expressed by the new parameter KGSI is proposed. In particular, a graphic method is also presented to determine rapidly and rationally the rock mass classification by the X, Y coordinates of the UCS and the KGSI. In order to further compare the evaluation results and application effects between the [BQ]GSI and the international rock mass classification systems, a comprehensive solution is carried out. First, the evaluation factors of rock mass qualities from all these system are classified according to three groups: the rock mass inherent parameters, external parameters, and construction parameters. Second, the correlations among these evaluation factors in the new [BQ]GSI system and the common international systems (i.e. RMR, Q, and RMi) were compared. And the formulas or charts among the three groups are presented. Finally, five hydropower underground excavations are chosen to analysis the comparison results of the [BQ]GSI system and the international common RMR, Q, or RMi systems. The applicability scope of these international RMR, Q, or RMi systems is also discussed in the context of China’s rock characteristics and geological stress conditions.]]> Sat 24 Mar 2018 08:43:36 AEDT ]]> Numerical analysis of failure mechanism of two parallel rock pillars https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:8886 Sat 24 Mar 2018 08:40:44 AEDT ]]> The dynamic disturbance as a mechanism to rigger the rockburst around the underground opening https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:8805 Sat 24 Mar 2018 08:38:18 AEDT ]]> Experimental investigation on the strength, deformability, failure behavior and acoustic emission locations of red sandstone under triaxial compression https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:21515 (C′), the switch from compaction-dominated to dilatant-dominated behavior (D′) and the stress at zero volumetric strain all increased linearly with the confining pressure. In our conventional triaxial compression experiments, the failure mode changed from mixed tension and shear fracture (single shear fracture) to shear fracture with double slippage planes with increasing confining pressure. However, the failure mode in our “reducing confining pressure” experiments was more complicated and results mainly from the unstable failure characteristics of the rock during the reduction in confining pressure. Finally, based on our acoustic emission (AE) locations, at a confining pressure of 35 MPa, a detailed analysis of the evolutionary process of internal cracks is presented for the entire loading process.]]> Sat 24 Mar 2018 08:03:37 AEDT ]]> Time-dependent damage constitutive model for the marble in the Jinping II hydropower station in China https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:18802 Sat 24 Mar 2018 07:51:06 AEDT ]]> Dynamic triaxial compression tests on sandstone at high strain rates and low confining pressures with split Hopkinson pressure bar https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:47581 −1 to 160 s−1. The results show that the dynamic uniaxial and triaxial compressive strengths of the sandstone will linearly increase with the logarithm of the stain rate. Under approximately the same strain rate, the dynamic triaxial compressive strength will linearly increase with the confining pressure. Although the peak strain has no dependence on the confining pressure, it will generally increase with the strain rate. The secant modulus is independent of the strain rate and confining pressure. Three trend diagrams, which reflect the influences of strain rate or confining pressure on the dynamic mechanical properties of sandstone in the uniaxial and triaxial compression tests, are given, and the correlation between the failure modes of the sandstone specimens and the characteristics of the stress-strain curves is also analyzed.]]> Mon 23 Jan 2023 14:21:30 AEDT ]]> Investigation of the leaching behavior of lead in stabilized/solidified waste using a two-year semi-dynamic leaching test https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33284 Fri 28 Sep 2018 15:47:21 AEST ]]>