In situ testing the integrity of rock bolts is essential to ensure the safety of underground excavations.
YieldPoint in conjunction with Marc Lamothe, formerly of Frazer and Jones Company frazerandjones.com, has developed a unit to accurately measure the in situ performance of rock bolts. The aim was to digitize underground pull tests so that graphs of load versus displacement could be developed during the testing process. This allows the test results to be aggregated before the testing team leaves a site, and reduces the potential for operator error associated with handwritten reporting. YieldPoint has sold the unit throughout the world and it is currently been adopted as the industry standard by many rock bolt suppliers such as Mansour Mining, DSI,
Jennmar Inc., and Atlas Copco amongst others. Individual mines have purchased a system as part of their rock bolt Quality Assurance(QA) testing.
YieldPoint can provide both the electronics and hydraulics for the system. The electronics consists of displacement sensor, pressure cell and load cells which can monitor the displacement and load during the pull test. These are recorded by a DAQ (Data Acquisition unit). Data is transmitted from the DAQ to a Windows TM Tablet or laptop PC. The Puilltest software can be loaded on as many computers as required.