- Отрасли: Energy
- Number of terms: 18450
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Underground mining methods. A technique that long sections of coal, up to about 700 feet, are removed and no pillars are left to support the mined-out areas. The working area is protected by a movable, powered roof support system. The caved area (gob) compacts and, after initial subsidence, supports the overlying strata. Longwall mining is used where the coalbed is thick and generally flat, where surface subsidence is acceptable.
Industry:Energy
Blanket insulation wrapped around the water heater to reduce loss of heat. To qualify under this definition, this wrapping must be in addition to any insulation provided by the manufacturer.
Industry:Energy
The number of mines, or mines collocated with preparation plants or tipples, located in a particular geographic area (state or region). If a mine is mining coal across two counties within a state, or across two states, then it is counted as two operations. This is done so that EIA can separate production by state and county.
Industry:Energy
The movement of electric power from generator to load by dividing along multiple parallel paths; it especially refers to power flow along an un intended path that loops away from the most direct geographic path or contract path.
Industry:Energy
A material that is a very poor conductor of electricity. The insulating material is usually a ceramicor fiberglass when used in the transmission line and is designed to support a conductor physically and to separate it electrically from other conductors and supporting material.
Industry:Energy
Any of the various naturally occurring in organic substances, such as metals, salt, sand, stone, sulfur, and water, usually obtained from the earth. Note For reporting on the Financial Reporting System the term also includes organic non-renewable substances that are extracted from the earth such as coal, crude oil, and natural gas.
Industry:Energy
Any loss in service for greater than 15 minutes by an electric utility of firm loads totaling more than 200 MW, or 50 percent of the total load being supplied immediately prior to the incident, whichever is less. However,utilities with a peak load in the prior year of more than 3000 MW areonly to report losses of service to firm loads totaling more than 300 MW for greater than 15 minutes. (The DOE shall be notified with service restoration and in any event, within three hours after the beginning of the interruption.)
Industry:Energy
Costs incurred in preparing well locations, drilling and deepening wells, and preparing wells for initial production up through the point of installing control valves. None of these functions, because of their nature, have salvage value. Such costs would include labor, transportation, consumable supplies, drilling tool rentals, site clearance, and similar costs.
Industry:Energy
An agreement wherein a mineral interest owner (lessor) conveys to another party (lessee) the rights to explore for, develop, and produce specified minerals. The lessee acquires a working interest and the less or retains a non-operating interest in the property, referred to as the royalty interest, each in proportions agreed upon.
Industry:Energy
