Kinematics and discreet modelling for ramp intersections
Geotechnical work was conducted in order to identify the required support length and other important parameters in ramp intersections at a deep level gold mine. The investigation included detailed scanline and joint mapping. Discreet models were constructed and eight different excavation orientation...
Saved in:
| Main Authors: | , |
|---|---|
| Format: | Book chapter |
| Language: | English |
| Published: |
CRC Press
2022
|
| Subjects: | |
| Online Access: | https://doi.org/10.1201/9780429462078 http://hdl.handle.net/11408/4899 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1779905191911358464 |
|---|---|
| author | Zvarivadza, T. Sengani, F. |
| author_facet | Zvarivadza, T. Sengani, F. |
| author_sort | Zvarivadza, T. |
| collection | DSpace |
| description | Geotechnical work was conducted in order to identify the required support length and other important parameters in ramp intersections at a deep level gold mine. The investigation included detailed scanline and joint mapping. Discreet models were constructed and eight different excavation orientations were analyzed in order to obtain a worst case scenario of mining direction. A sensitivity analysis was conducted and the effect of clamping stresses on the hanging wall was quantified. The probabilistic modeling program, JBlock, was utilized to quantify the probable maximum apex height of blocks forming in the ramp intersections. A geo-domain was constructed making use of all the data acquired and was analyzed. Eight excavations were constructed ranging in mining directions from 0 to 315 degrees. The excavations were assumed to have a dip of 8 degrees to ensure the largest blocks are created, subsequently catering for the worst case scenario. The output data created by the software was scrutinized for failed blocks, and cumulative distribution graphs created. In order to understand the effect of clamping stresses in the hanging wall, the worst case mining direction (180 degrees) was utilized and clamping stresses in the hanging wall were varied from 0 kPa to 30 kPa. A 32% reduction in the 50 percentile apex height was attained when the clamping stress increased to 5 kPa, a 43% reduction was attained when a clamping stress of 10 kPa was applied, and a 48% reduction in apex height was attained when the clamping stress was set to 30 kPa. |
| format | Book chapter |
| id | ir-11408-4899 |
| institution | My University |
| language | English |
| publishDate | 2022 |
| publisher | CRC Press |
| record_format | dspace |
| spelling | ir-11408-48992022-06-28T08:36:23Z Kinematics and discreet modelling for ramp intersections Zvarivadza, T. Sengani, F. Ramp intersections Gold mine Kinematics discreet modelling Geotechnical work was conducted in order to identify the required support length and other important parameters in ramp intersections at a deep level gold mine. The investigation included detailed scanline and joint mapping. Discreet models were constructed and eight different excavation orientations were analyzed in order to obtain a worst case scenario of mining direction. A sensitivity analysis was conducted and the effect of clamping stresses on the hanging wall was quantified. The probabilistic modeling program, JBlock, was utilized to quantify the probable maximum apex height of blocks forming in the ramp intersections. A geo-domain was constructed making use of all the data acquired and was analyzed. Eight excavations were constructed ranging in mining directions from 0 to 315 degrees. The excavations were assumed to have a dip of 8 degrees to ensure the largest blocks are created, subsequently catering for the worst case scenario. The output data created by the software was scrutinized for failed blocks, and cumulative distribution graphs created. In order to understand the effect of clamping stresses in the hanging wall, the worst case mining direction (180 degrees) was utilized and clamping stresses in the hanging wall were varied from 0 kPa to 30 kPa. A 32% reduction in the 50 percentile apex height was attained when the clamping stress increased to 5 kPa, a 43% reduction was attained when a clamping stress of 10 kPa was applied, and a 48% reduction in apex height was attained when the clamping stress was set to 30 kPa. 2022-06-28T08:36:23Z 2022-06-28T08:36:23Z 2018 Book chapter 9780429462078 https://doi.org/10.1201/9780429462078 http://hdl.handle.net/11408/4899 en EUROCK2018: Geomechanics and Geodynamics of Rock Masses: Proceedings of the 2018 European Rock Mechanics Symposium Edited By Vladimir Litvinenko;Chapter 133 open CRC Press |
| spellingShingle | Ramp intersections Gold mine Kinematics discreet modelling Zvarivadza, T. Sengani, F. Kinematics and discreet modelling for ramp intersections |
| title | Kinematics and discreet modelling for ramp intersections |
| title_full | Kinematics and discreet modelling for ramp intersections |
| title_fullStr | Kinematics and discreet modelling for ramp intersections |
| title_full_unstemmed | Kinematics and discreet modelling for ramp intersections |
| title_short | Kinematics and discreet modelling for ramp intersections |
| title_sort | kinematics and discreet modelling for ramp intersections |
| topic | Ramp intersections Gold mine Kinematics discreet modelling |
| url | https://doi.org/10.1201/9780429462078 http://hdl.handle.net/11408/4899 |
| work_keys_str_mv | AT zvarivadzat kinematicsanddiscreetmodellingforrampintersections AT senganif kinematicsanddiscreetmodellingforrampintersections |