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The problems included a coal storage shaft known as a "glory hole," which the miners said was not properly sealed and had leaked methane gas.
An Upper Big Branch miner who appeared before a federal grand jury within the past two weeks said investigators seemed especially interested in the mine's ventilation system, specifically whether certain air-lock doors and a storage shaft known as the glory hole were properly sealed to control the flow of clean and contaminated air.
Digging a shaft or drift inside a rock mass is a common practice in civil engineering when a transportation way, such as a motorway, railway tunnel or storage shaft is to be built.
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This paper introduces dynamic waves and their influence on the underground structures; controlling methods of dynamic waves induced by blasting in the base of peak particle velocity and finally design of surge tank storage shafts excavation in Gotvand dam neighbor of concrete structures in these storages.
From an opening in the floor of the storage room, a shaft descended about thirty-five feetoto a small chamber, where grapefruit-size rocks were embedded in the soil.
This paper analyzes the effect of fuzzy logic-controlled superconductive magnetic energy storage (SMES) on minimizing shaft torsional oscillations of synchronous generators in a multi-machine power system.
Consequently, in week 46 the burns theatre was closed and underwent deep cleaning (that is, decluttering of the operating theatre, followed by cleaning of all patient-associated equipment, non-fixed items, horizontal surfaces, walls, ceilings, ventilation shafts and storage areas with a chlorine-based disinfectant).
Other buildings are finding gold in unused storage rooms and even elevator shafts.
The other smokers took their breaks inside, huddled beneath the grille of a ventilation shaft in an old storage room.
If you're an Autobot then you get the shaft with only 1GB of storage while those dastardly Decepticons get 2GB.
Nevertheless, significant storage levels in the MWh range are available in shaft type systems exhibiting depths approaching 1 km, or in basin configurations of sizeable area (six or more Olympic scale swimming pools).
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com