Underground Ground Control Major Hazard Standard - MIRMgate

Major Hazard StandardUnderground Ground Control** Uncontrolled copy. Use latest revision **4.9.4 Raise BoringNo work shall be conducted in or below the raisebore hole unless supported to the minimum standardor overhead protection is provided4.10 Use of ChecklistsThe Ground Control Co-ordinators and GroundControl Operators shall use appropriate checklistswhen assessing the quality of the ground support orreinforcement installation.4.11 Survey Mark-Up, Sampling Mark-Up andGeotechnical MappingSpecial consideration shall be given to surveyors,samplers, geologists and other infrequent visitorswho visit the faces on an irregular basis for tasksincluding set up from a survey control, face mark up,mapping the area, collecting samples, etc.Surveyors, geologists, samplers and other infrequentvisitors shall be familiar with the Shift Plan, and beprovided with relevant information on localconditions before entering a work location.5 Monitoring the Ground Control PlanThere shall be in place a system for auditing andchecking processes to ensure that the system isworking correctly.• A system for recording ground support andreinforcement failures and deviations fromexpectations, as well as a process for reviewing thefailure or deviation and taking appropriate action• Testing systems specifically designed for each typeof ground control (including wherever possiblephysical testing)As a minimum, 0.1% of newly installed groundsupport or reinforcement in each rock type shall betested against the performance criteria in theGround Control Plan. Testing shall be undertakenon a random basis and the interval between thetests shall not exceed three months• A process for reviewing any continuous andautomatic systems for monitoring of rockconditions to indicate hazardous changes notvisible (part of ground hazard identification andcontrol system), including SWPs for installationand use of continuous and automatic monitoringsystem• A regular inspection program of defined locationsand specific conditions to identify and controlproblems in supported areas where there is anincreased risk to personnel from rockfall hazards• A regular inspection and monitoring program ofdefined locations for areas where there is anidentified risk of uncontrolled ground failure whichcould result in surface subsidence and inrushes.5.1 Monitoring Compliance with the GroundControl PlanThe Mine Manager is responsible for ensuring that anauditing process is in place to:• Monitor on a regular basis as appropriate to themine the SWPs for ground control• Check the quality of ground control materials andground support or reinforcement installation atrandom locations throughout the mine at least oncea month. (This is to be done by a competentperson)• Record the locations throughout the mine whereexisting support or ground conditions are to bemonitored (refer to related documentSAF-MHS01-R01 Ground Control InspectionChecklist for guidelines).• Feed back to the Ground Control Operator via theGround Control Co-ordinator any results of groundsupport or reinforcement methods monitoring.5.2 Monitoring the Effectiveness of GroundControl PlanTo enable the effectiveness of the Ground ControlPlan to be monitored, the following shall be in place:SAF-MHS-01 Rev. 1 DOCS No. 55945 Issued: 19/06/00 Page 13 of 23