Dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining
The Yielding Flexi-bolt reinforcement system was introduced at one of the deep to ultradeep mechanised gold mine in the year 2011. Two types of the Yielding Flexi-bolts reinforcement system were implemented: un-grouted and grouted (cement grout) Yielding Flexi-bolts. Un-grouted Yielding Flexi-bolts...
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| Format: | Book chapter |
| Language: | English |
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CRC Press
2022
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| Online Access: | https://doi.org/10.1201/9781351181327 http://hdl.handle.net/11408/4884 |
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| author | Sengani, F. Zvarivadza, T. |
| author_facet | Sengani, F. Zvarivadza, T. |
| author_sort | Sengani, F. |
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| description | The Yielding Flexi-bolt reinforcement system was introduced at one of the deep to ultradeep mechanised gold mine in the year 2011. Two types of the Yielding Flexi-bolts reinforcement system were implemented: un-grouted and grouted (cement grout) Yielding Flexi-bolts. Un-grouted Yielding Flexi-bolts were then replaced by grouted Yielding Flexi-bolts. This paper aims to evaluate the effectiveness of the cement grouted Yielding Flexi-bolts. To achieve the objective of the research, both surface tests and Underground tests were conducted in order to understand the behavior and performance of Yielding Flexi-bolts. The results of the study showed that tensioning, grouting, angle of installation and corrosion were the common factors that influence the failure of Yielding Flexi-bolts. The dynamic drop test results were ranging from 50–80 kN and energy absorption ranging from 27.7–33.1 kJ. The surface pull test indicated a maximum load of 140 kN, while the underground pull test was found to range from 170–200 kN. |
| format | Book chapter |
| id | ir-11408-4884 |
| institution | My University |
| language | English |
| publishDate | 2022 |
| publisher | CRC Press |
| record_format | dspace |
| spelling | ir-11408-48842022-06-28T07:01:58Z Dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining Sengani, F. Zvarivadza, T. Yielding Flexi-bolt reinforcement system Un-grouted Yielding Flexi-bolts grouted Yielding Flexi-bolts hard rock underground mining The Yielding Flexi-bolt reinforcement system was introduced at one of the deep to ultradeep mechanised gold mine in the year 2011. Two types of the Yielding Flexi-bolts reinforcement system were implemented: un-grouted and grouted (cement grout) Yielding Flexi-bolts. Un-grouted Yielding Flexi-bolts were then replaced by grouted Yielding Flexi-bolts. This paper aims to evaluate the effectiveness of the cement grouted Yielding Flexi-bolts. To achieve the objective of the research, both surface tests and Underground tests were conducted in order to understand the behavior and performance of Yielding Flexi-bolts. The results of the study showed that tensioning, grouting, angle of installation and corrosion were the common factors that influence the failure of Yielding Flexi-bolts. The dynamic drop test results were ranging from 50–80 kN and energy absorption ranging from 27.7–33.1 kJ. The surface pull test indicated a maximum load of 140 kN, while the underground pull test was found to range from 170–200 kN. 2022-06-28T07:01:58Z 2022-06-28T07:01:58Z 2018 Book chapter 9781351181327 https://doi.org/10.1201/9781351181327 http://hdl.handle.net/11408/4884 en Rock Dynamics – Experiments, Theories and Applications: Proceedings of the 3rd International Confrence on Rock Dynamics and Applications (RocDyn-3), June 26-27, 2018, Trondheim, Norway, Edited ByCharlie C. Li, Xing Li, Zong-Xian Zhang; open CRC Press |
| spellingShingle | Yielding Flexi-bolt reinforcement system Un-grouted Yielding Flexi-bolts grouted Yielding Flexi-bolts hard rock underground mining Sengani, F. Zvarivadza, T. Dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining |
| title | Dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining |
| title_full | Dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining |
| title_fullStr | Dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining |
| title_full_unstemmed | Dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining |
| title_short | Dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining |
| title_sort | dynamic test of flexi-bolts reinforcement system and its performance in hard rock underground mining |
| topic | Yielding Flexi-bolt reinforcement system Un-grouted Yielding Flexi-bolts grouted Yielding Flexi-bolts hard rock underground mining |
| url | https://doi.org/10.1201/9781351181327 http://hdl.handle.net/11408/4884 |
| work_keys_str_mv | AT senganif dynamictestofflexiboltsreinforcementsystemanditsperformanceinhardrockundergroundmining AT zvarivadzat dynamictestofflexiboltsreinforcementsystemanditsperformanceinhardrockundergroundmining |