In conjunction with Marc Lamothe, formerly of Frazer and Jones Company frazerandjones.com, YieldPoint Powered by Epiroc 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.
We have supplied the solution to numerous global rock bolt suppliers, and 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 Pulltest software can be loaded on as many computers as required.
Displacement Sensor:
In-Line Pressure Sensor:
Donut Load Cells: