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Mesabi structural drilling
| Diamond Glossary (алмазы и бриллианты - глоссарий терминологии) |
A method of mineral exploration drilling, developed on the western mesabi range and utilizing reverse-circulation wash boring and/or churn drilling to drill through and obtain samples of the soft (wash ore) or fractured bodies of iron ore.
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Exploration, английский
- Поисково-разведочные работы, прр. комплекс региональных буровых и геофизических работ поискового и разведочного бурения
- Поисковое исследование
- The general activity undertaken to identify and classify the elements of which a soil mass is constituted. explosion-proof said of an enclosure that is capable of withstanding an explosion of a specified gas or vapor that may occur within it, and of preventing the ignition of the gas or vapor surrounding it.
- A procedure or surgical operation where the aim is to discover the cause of symptoms or the nature and extent of an illness
- The work involved in looking for mineral deposits and determining their extent by drilling boreholes or by excavations.
- Поисково-разведочные работы (прр). комплекс региональных бу- ровых и геофизических работ поискового и разведочного бурения.
- The search for reservoirs of oil and gas, including aerial and geophysical surveys, geological studies, core testing and drilling of wildcats.
Circulation, английский
- Циркуляция
- Circulation (of the blood) movement of blood around the body from the heart through the arteries to the capillaries and back to the heart through the veins she has poor circulation in her legs. rub your hands to get the circulation going. comment: blood circulates around the body, carrying oxygen from the lungs and nutrients from the liver through the arteries and capillaries to the tissues. the capillaries exchange the oxygen for waste matter such as carbon dioxide which is taken back to the lungs to be expelled. at the same time the blood obtains more oxygen in the lungs to be taken to the tissues. the circulation pattern is as follows: blood returns through the veins to the right atrium of the heart. from there it is pumped through the right ventricle into the pulmonary artery, and then into the lungs. from the lungs it returns through the pulmonary veins to the left atrium of the heart and is pumped from there through the left ventricle into the aorta and from the aorta into the other arteries.
- The passing of any liquid or gas to the end of the drill string and back to the surface in the process of drilling a borehole.
- The movement of air currents through mine openings.
- An item that is communicated to team members on a group work site, and that supports confirmation and tracking of which team members have viewed it. cisc (n)
- Caused by quick changes in pressure, cavitation is the creation of vapor cavities within a low-pressure liquid. cavitation can cause severe wear through cyclic stress on metal surfaces as they implode.
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Fusion piercing, английский
A method of producing vertical blast-holes by virtually burning holes in rock. the burning device is essentially a long blowpipe consisting of three tubes equipped with jets at the bottom end. two of the tubes carry kerosine and oxygen, which, when jetted together and ignited, generate a flame having a temperature of about 4,000° f. this flame is directed downward against the rock, superheating a circular area. a following jet of water cools the heated rock, causing it to contract and spall, or, if partially molten, to granulate. the resulting steam evacuates the spall from the hole and also keeps the burner from melting. also commonly, although incorrectly, called jet piercing. see linde drill.
Hydraulic feed, английский
A method of imparting longitudinal movement to the drill rods on a diamond or other rotary-type drill by a hydraulic mechanism instead of mechanically by gearing. see feed cylinder.
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