Oct 07, 2020 Phase2 is a powerful 2D elasto-plastic finite element stress analysis program for underground or surface excavations in rock or soil. Download geotechnical engineering software RS2 11.0 developed by Rocscience. RocScience 2020 Full Suite (RS2+RS3+Slide3+Slide2+CPilar+Dips+EX3+Examine2D+RocData+RocFall+Roctopple ETC) EmbCads September 5, 2020 3:21 pm Rocscience is an industry-leading developer of geotechnical software. RS2 (Formerly RS 2 or Phase 2) is a powerful 2D finite element program for soil and rock applications. RS2 can be used for a wide range of engineering projects including excavation design, slope stability, groundwater seepage, probabilistic analysis, consolidation, and dynamic analysis capabilities.
Rocscience Phase2 v9.015
RS2 (Phase2 9.0) is a powerful 2D finite element program for soil and rock applications (RS2 = Rock and Soil 2-dimensional analysis program). RS2 can be used for a wide range of engineering projects and includes excavation design, slope stability, groundwater seepage, probabilistic analysis, consolidation, and dynamic analysis capabilities.
Complex, multi-stage models can be easily created and quickly analyzed – tunnels in weak or jointed rock, underground powerhouse caverns, open pit mines and slopes, embankments, MSE stabilized earth structures, and much more. Progressive failure, support interaction and a variety of other problems can be addressed.
RS2 offers a wide range of support modeling options. Liner elements can be applied in the modeling of shotcrete, concrete, steel set systems, retaining walls, piles, multi-layer composite liners, geotextiles, and more. Liner design tools include support capacity plots, which allow you to determine the safety factor of reinforced liners. Bolt types include end anchored, fully bonded, cable bolts, split sets, and grouted tiebacks.
One of the major features of RS2 is finite element slope stability analysis using the shear strength reduction method. This option is fully automated and can be used with either Mohr-Coulomb or Hoek-Brown strength parameters. Slope models can be imported or exported between Slide and RS2 allowing easy comparison of limit equilibrium and finite element results.
RS2 includes steady-state, finite element groundwater seepage analysis built right into the program. There is no need to use a separate groundwater program. Pore pressure is determined as well as flow and gradient, based on user defined hydraulic boundary conditions and material conductivity. Pore pressure results are automatically incorporated into the stress analysis.
Material models for rock and soil include Mohr-Coulomb, Generalized Hoek-Brown and Cam-Clay. Powerful new analysis features for modeling jointed rock allow you to automatically generate discrete joint or fracture networks according to a variety of statistical models. With new 64-bit and multi-core parallel processing options RS2 can solve larger and more complex models in shorter times.
Product:Rocscience Phase2 v9.015
Lanaguage:english
Platform:Win7/WIN8
Size:1CD
It would be a perfect world if slope failure didn’t need to be on an engineer’s mind. However, even with advanced technology like radar monitoring and software for predictive modelling, slope failure can occur.
This case study details the failure of a highwall at an open-pit coal mine in Alberta, Canada in which two failures occurred, one on July 9th, 2017 followed by a larger failure August 5th, 2017. Mining at this site was suspended until a safe re-entry plan was developed and implemented.
In an industry where time is money, powerful geotechnical tools enable you to get results efficiently so that projects are completed on schedule or in this case mining could resume as soon as possible. RS2, Rocscience's 2D finite element analysis program, was used to conduct back-analysis to first determine the cause of the two slope failures. Then, forward-analysis was used to model two scenarios for safe re-entry to resume mining.
Open Pit Mine South Highwall
The south highwall of this mine was about 60m high and consisted of interbedded sediments including sandstone, siltstone, shale, mudstone, limestone and conglomerate. These sediments dipped into the highwall between 50 and 65 degrees. There were also two parallel faults that ran obliquely into the wall at the toe of the failed slope.
Radar monitoring of the south wall was established only three days prior to the initial failure so there was not enough information to predict the failure from occurring. However, the second failure was identified prior to the event by radar.
After these two failures occurred, the eastern part of the highwall was seen to have potential rockfall hazards and the western part of the wall as having a large toppling rock mass that had not fully failed.
RS2 Analysis
Rocscience Rs2 Free Download
The methodology includes an elastic-plastic material, disturbance factor D= 0.7, and an in-plane horizontal to vertical stress ratio k= 1.5. Shear stiffness was estimated based on nearby direct shear testing and normal stiffness was estimated to be 3 times the value of shear stiffness.
Back-analysis of the south highwall was conducted using RS2 to fully understand what caused the slope to fail. The results show the initial failure to be caused from over-digging at the toe of the slope. This caused a circular failure within the material.
Re-entry Plan
Shear Strength Reduction (SSR) was used to calculate the strength reduction factors (SRF). The design acceptable criteria (DAC) of 1.3 was the target for designing the re-entry plan. Forward analysis was used to model two different re-entry scenarios.
Scenario one included rockfall deflection or containment berm at the bottom of the failed slope with no crest unloading above. Benching would be implemented below the toe of the slope.
Scenario two suggested unloading the crest by benching through the failed material with two benches, 10m high and 20-25m wide. This would result in stabilization of the slope and partial mitigation of the west toppling hazard. A loaded Komatsu 830 truck was used as a worst-case truck load at the top of the crest, modelled using 2MN/m line loads spaced 7m apart.
The results of the SSR analysis are shown in the table below. Scenario 1 had the potential for failure to occur again with strength reduction factor below 1. Scenario 1 also doesn’t address the potential for the west part of the wall from toppling. Scenario 2 does address the toppling hazard and fulfills the target 1.3 SRF for mining to 1805m and 1.1 for the final sub-out.
Based on these results of SSR analysis, Scenario 2 was selected as the method for implementation.
Rocscience Rs2 Download
Whether it is predictive modelling, or back-analysis of slope failures, RS2 has once again proven it is an effective tool for analyzing problems in open-pit mines. For even more detailed analysis, RS3, our 3D Finite Element Analysis program can handle the projects that require a more in-depth look into your model. The latest version of RS3 has arrived, packed with new features to ensure you are using one of the best 3D FEM programs on the market.
Rocscience Rs2 Download
RS2 & RS3 are comprehensive finite element analysis programs that can handle a wide variety of applications. Start a free two-week trial and see how these tools can benefit you.
Note: The above case study is based on the full-paper by Bidwell A., et. al presented at Slope Stability 2020. Read the full paper here.