Install Water Control Devices ▪ The Jumbo operator then moves the boom with the Mineright packer into position and aligns this with the other boom stemming the hole, enabling an easier insertion of the plug and preventing damage to the Mineright packer assembly. ▪ The Jumbo operator retracts the boomwith the tapered plug from the hole and then moves the Mineright boom to the collar of the hole. Using the fine feed, the Jumbo operator carefully inserts the Mineright packer until it is seated on the smaller diameter hole. The insertion depth is dependent upon the length of the Mineright packer used. ▪ Once the required depth is reached, the Jumbo operator rotates the dolly to tension the packer until the drifter stalls. ▪ Retract the dolly slowly ▪ When satisfied with the Mineright packer anchoring, the Jumbo operator shuts down the Jumbo with the boom still in place behind the Mineright packer. The operator or offsider then installs a grout injection nozzle and a safety chain from the packer to a ground support anchor point to eliminate the risk of the Mineright packer ejecting. ▪ If a positive seal has not been achieved, re-engage the dolly with the Mineright packer and reverse rotate. This will undo the tension on the packer and release it from the hole. ▪ Reinstall the packer and forward rotate until the drifter stalls. Figure: Mineright Packer installed and hooked up for grout injection. 2.2.3. Packer Removal After Grouting Packers may only be removed when the grout inside the rock/hole has reached initial set and stiffened sufficiently to resist the back pressure within the rock; i.e. it does not begin to flow when the ball valve on the packer is opened. To monitor grout setting time, it is useful to take cup samples of the grout during production to assess the time for initial set. Valves should not be opened prematurely or too often, as this will disturb the grout setting process within the hole. NOTE:
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