Engineering and Mining Journal - Whether the market is copper, gold, nickel, iron ore, lead/zinc, PGM, diamonds or other commodities, E&MJ takes the lead in projecting trends, following development and reporting on the most efficient operating pr
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SURFACE DRILLING MARCH 2017 • E&MJ 33 www.e-mj.com the onboard computer controls 'assisting' the driller to meet those targets." 3-D Grid Detects Obstacles Joy Global introduced the P&H 77XD blasthole drill at MINExpo. The rig, with a bit range diameter of 7.88 to 10.63 in. (200 to 270 mm), can be configured for rotary or hammer, diesel or electric power, and single-pass or multipass drilling, the company reported. The rig is equipped with features the company said can deliv- er an up to 10% maintenance and repair cost advantage, and an up to 5% avail- ability advantage. "This new machine of- fers tremendous versatility with the ability to vary in configuration from simple base functionality to highly equipped options with technological features that optimize cycle times, increase ease of use and low- er operational costs," said Matt Collins, product manager, drills. For example, it has a boxer style mast construction with a simple bolt-on rack and pinion pulldown design. It features automatic bit handling and pipe handling functions. Like the competition, the rig fea- tures automated functions, and can be remote-controlled and otherwise inte- grated to a digital or satellite system-en- renewed focus on the design and con- struction of these facilities. Mine owners and operators are assessing the stability of their existing impoundments. In ad- dition, owners are realizing some im- poundments contain tailings that, with current technology, can be reprocessed to produce valuable material. Sonic drilling can assist during the planning and design stages of TSFs. Rapid exploratory drilling can help the planners understand better the area in which the impoundment is planned. Part of this process might include the instal- lation of inclinometers so that it is clear how material will flow in the area. These rigs can also help with the installation of monitoring wells so that the area can be evaluated from a baseline to help ensure no hazardous wastes are seeping into sur- rounding groundwater tables. In-situ core samples can show geologists the differ- ent features of the substrate so that the tailings facility can be placed in an ideal, targeted area. Once the TSF has been constructed, sonic rigs can help with the installation of piezometers for additional monitoring. The ability of Sonic Drill Rigs to secure perfect, continuous core samples means that geologists and environmental experts can regularly implement soil and water sampling to make sure the structures are sound and all hazardous materials are be- ing secured properly. The crawler-mounted TSi 150C Sonic Drill Rig can drill up to 1,000 feet depending upon the lithology and casing design.