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“By chipping, crushing, and powdering hard rock formations, the Hughes two-cone drill bit could reach vast amounts of oil in reservoirs thousands of feet below the surface,” ASME said.

- Ore stacked decreased as the quantity of ore mined decreased with lower-grade stockpiles supplementing the stacked feed. Stacking at the heap leach operation ceased in mid-December.

Seismic surveys provide what is likened to a pictorial distribution of the subsurface structure and stratigraphy. The method involves the propagation and measure of artificial acoustic waves into the earth. This method works by differentiating rocks based on their “seismic impedance”. This is the product of velocity (v) and density (ρ) of each rock layer in the subsurface, implying that each rock has its own characteristic impedance. As waves progress through the layers beneath the earth, some of its energy are reflected or refracted at the interface or impedance boundary between different rock types. The remaining are transmitted through the underlying formation, and the whole process repeats itself as other rock layers are subsequently encountered.

The Tri-Five body was sourced in New Hampshire as the East Coast is not friendly to old steel with its Atlantic climate.

By Edd Dracott and Max McLean, Press Association Video shows the moment Norwegian Manchester United fans gathered near their local church to celebrate the managerial success of compatriot Ole Gunnar Solskjaer.

On the aspect of training, Booysen Bore transfers the theoretical and practical class-accredited training provided by qualified Epiroc MQA and MerSETA trainers to their operators.  “We are committed to stimulating development through collaboration with our local communities and we consequently source our operators from the local labour force.” Booysen Bore was instrumental in the development of a small local empowerment company by providing the business with a small part of its core drilling service.

Other desirable features of infant MC are the surgical ease of performing a circumcision on an immobile newborn, the speed of the operation, absence of any need to use sutures, quick healing, and good cosmetic outcome [97, 98]. Further information is provided in an extensive recent review of instrumentation and techniques for infant and later circumcision [99].

Watching only gauges can be self-defeating, because, by the time they register an anomaly, something significant already has happened in the ground. Hissem talks of the old days when drill operators were exposed to the heat and cold and dust and noise. “Then we got cabs and old-timers didn’t like it, even though they were more comfortable, because it cut them off from sensory information.” So-called “smart drills” are being developed with onboard intelligence and systems that will separate operators even more from the “feel” of operation. Until such machines dominate drill sites, operators should keep sensing the pulse of their machines. They should actively monitor such things as the flushing action, any pitch changes in the drill string, subtle movements that indicate a change in rock pressure, the size of cuttings, and groundwater. Hissem believes a master driller can fully develop this “sixth sense” in a couple of years.

- Sustaining costs are expected to increase from $13 million to circa $24 million mainly due to increased waste capitalization.

Non-sustaining capital spend was consistent with Q3-2018, with $8.3 million spent. The Q4-2018 costs were mainly related to pre-stripping at the Kao deposit, as well as the resettlement costs associated to its development.

Sustainability is important to making sure that we have and will continue to have, unpolluted water, materials, and resources to protect human health and our environment.