Engineering & Mining Journal

AUG 2017

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MINE DEVELOPMENT AUGUST 2017 • E&MJ 35 www.e-mj.com The primary deliverable of the mod- ule is real-time access to critical data, Peugh said. This empowers miners to follow material as it is moved, identify material re-handling, prevent the dump- ing of waste into ore stockpiles, reduce the frequency of manual surveys, and track dynamic material quantities and qualities of stockpiles and ore passes. "For block caving mines, the module facilitates tracking of tonnes moved at ore passes to prevent over- or under-ex- traction," he said. "Mines also gain the ability to track additional material prop- erties, including the presence of penal- ty minerals, to better assist the mineral processing team." So far, Peugh said, Modular has re- ceived positive feedback from an under- ground miner in Australia who used the module to manage ore pass inventory and to track volumes and grade parameters at intermediate muck piles. The Draw Cards module assists in block cave mining by automating some of the oversight tasks for LHDs. The module presents LHD operators with in- dividual draw tasks corresponding to the draw point extraction plan for the current shift. The FMS imports .csv files from third-party mine-planning tools, and then automatically creates the draw cards. The cards include information on extraction location, number of draw points, planned start date, shift, assigned equipment, ex- traction status, and numbers of planned and completed draws. Some of this information appears on the Mobile Application Draw Cards screen, which displays on the in-cab mobile field computer. "Draw Cards are transmitted to each assigned LHD via the mine's communication network," Peugh said. "The user interface presents only information that is pertinent to the task, enabling the operator to obtain instruc- tions at a glance." That information includes the ex- traction location and the real-time ex- traction counts. Those counts are a deliv- erable of the Material Inventory module. That same data is accessible to the supervisor. "The Draw Cards perspective in the FMS' Desktop Application utilizes color-coding and simple icons to commu- nicate draw status," Peugh said. "The supervisor can see actual-verses-planned deviations and variances." The operators can use the Mobile Application to communicate a change of plan. "That initiates a corresponding, corrective workflow to remedy the issue," Peugh said. "The operator can also send a text message to the dispatcher or super- visor via the mobile field computer." The module enables a smooth tran- sition between shifts, at least when it comes to transferring forward unfinished work. "When a Draw Card has unfinished work at the end of the shift, the FMS cre- ates a new Draw Card for the following shift," Peugh said. "The new Draw Card includes only the planned draws that the outgoing operator failed to complete." By enabling real-time updates to ex- traction plans, rework is reduced. Also reduced is the number of misreported loads. Ultimately, reducing both leads to cost savings, Peugh said. For example, if a draw point is underdrawn, the excess of material can seize, requiring explosives to loosen the material or rendering materi- al extraction impossible. Conversely, if a draw point is overdrawn, mine planning must accommodate for this overdraw by creating a plan to balance the extraction. Either will result in a lower rate of pro- duction and lost revenue, Peugh said. "The Draw Cards module provides truth- ful validation of operator and equipment performance," he said. "This allows for accurate extraction tracking to prevent these circumstances." The Modular DISPATCH Underground 2015 Draw Cards module enables exact draw point extraction plans to be created and distributed to operators, Modular reports. The module is also an unbiased extraction management tool, reducing misreported loads and other human errors. Above, a WIFI zone where in-cab mobile computers can talk to the DISPATCH server. (Photo: Modular)

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