room and pillar वाक्य
उदाहरण वाक्य
मोबाइल
- This is the tool to have for room and pillar mining.
- Room and pillar layouts, similar to underground mine design, provide an economical construction arrangement.
- Another method, known as room and pillar, is used for thinner, flatter ore bodies.
- Mining was done by underground room and pillar methods.
- It was a room and pillar operation with an estimated recovery of about 35 %.
- Underground mining began, using a room and pillar approach.
- Longwall mining has been extensively used as the final stage in mining old room and pillar mines.
- The key to successful room and pillar mining is in the selection of the optimum pillar size.
- Nuttallburg was closely associated with the Nuttallburg underground mine, a room and pillar mine that was sealed in 1958.
- The Peerless Mine was an underground room and pillar operation that mined coal near the outcrop of the Wyodak seam.
- Coal was extracted by room and pillar working in the Black and White mine and longwall mining in the Trencherbone.
- Mine voids in the inclined slope resulted from the practice of room and pillar mining during the early 20th century.
- The mines are located in Lea and Eddy counties, New Mexico, and are operated by the room and pillar method.
- It was constructed using the room and pillar technique, where pillars of dolostone have been left to support the overlying rock.
- Pink areas were a room and pillar mine at the time of the disaster, while retreat mining had been completed in the brown areas.
- Stone was extracted by the " room and pillar " method, by which chambers were mined, leaving pillars of stone to support the roof.
- Room and pillar mines are developed on a grid basis except where geological features such as faults require the regular pattern to be modified.
- Much of the city, particularly the northern portion, has been undermined by room and pillar extraction of coal that took place in the 1800s.
- It has a grid of high, wide tunnels separated by square limestone pillars created by the room and pillar method of hard rock mining.
- Quarrying is done using the room and pillar method, mining only half of the salt and leaving the remaining half to support what is above.
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