A raise borer is a machine used in underground mining, to excavate a circular hole between two levels of a mine without the use of explosives.
The raise borer is set up on the upper level of the two levels to be connected, on an evenly laid platform (typically a concrete pad). A small-diameter hole (pilot hole) is drilled to the level required; the diameter of this hole is typically 230mm - 445mm (9" - 17.5"), large enough to accommodate the drill string. Once the drill has broken into the opening on the target level, the bit is removed and a reamer head, of the required diameter of the excavation, is attached to the drill string and raised back towards the machine. The drill cuttings from the reamer head fall to the floor of the lower level. The finished raise has smooth walls and may not require rock bolting or other forms of ground support. The one of impressive use of raise boring is a 7.1 m diameter shafts for Sasol's Middelbult and Bosjesspruit Mines in South Africa. Masterdrilling is currently the world's biggest raise boring firm with operations throughout all 7 continents.
No puedes ponerle un final A lo que nunca empezó Cuando buscas una razón El viento no marcha a tu favor Sabe lo que sientes Sabe cuánto la quieres Cuánto la odias más Cuando de la nada se va La respuesta a lo que son Una contradicción Su misterio es tu adicción Que te hace andar anclado a su pasión Si dice quererte porque siempre se va Dejando un rastro más La huella que quiebra tu paz Coro Por qué insistes en llegar A un sitio que no tiene dueño No busques más en su silencio No temas salir de este encierro
English teacherNatalie Borer described him as a caring person who devoted his time to Corning youth wrestling and football ... Natalie Borer ... Borer said sponsors, registrants and raffle donations helped this year’s event raise $5,000.
This native species of predatory stink bug is already treasured for using its thick proboscis to stab and slurp up the insides of corn earworms, potato beetles, corn borers, spongy moths, and cabbage loopers.
It also helped raise caution as the emerald ash borer, an invasive insect that infects and eventually kills ash trees — also a beloved native tree, used for millennia by Wabanaki and other Indigenous...
Questions about long-term dangers both to the population and the environment have been raised. Second is the Bt eggplant/talong, which was modified to be resistant to fruit and shoot borer pests ...There are, however, dangers to the local ecosystem ... ....
They're a big, physical team — they hit me hard a couple times, probably the hardest I've been hit all season," Borer said ... Borer rushed for 127 yards and two scores on 25 carries, raising his season total to 2,002 yards and 25 touchdowns.
They're a big, physical team — they hit me hard a couple times, probably the hardest I've been hit all season," Borer said ... Borer rushed for 127 yards and two scores on 25 carries, raising his season total to 2,002 yards and 25 touchdowns.
They're a big, physical team — they hit me hard a couple times; probably the hardest I've been hit all season," Borer said ... Borer rushed for 127 yards and two scores on 25 carries, raising his season total to 2,002 yards and 25 touchdowns.
The miners’ ordeal began on August 5, 2010, when the main ramp into the mine collapsed, leaving them stranded ... Israel-Hamas War ... WATCH ... Plan A employed a Raise Borer Strata 950, typically used for drilling ventilation shafts in mines ... ET ... .
That raises Holly’s 2023 season rushing total to 1,101 yards, making him a Two-Time thousand yard rusher (1000 even in 2022) ... That raises Borer’s season ground total to 1,348 yards with 16 TDs.
That raises Holly’s 2023 season rushing total to 1,101 yards, making him a Two-Time thousand yard rusher (1000 even in 2022) ... That raises Borer’s season ground total to 1,348 yards with 16 TDs.
The emerald ash borer was detected in June in a small area in northeast Littleton, raising concerns as the beetle continues to spread ... In an undated photo provided by the Minnesota Department of Natural Resources, an adult emerald ash borer is shown.
Alarms over a borer infestation have been raised after a Northland mother found holes and sawdust in her recently purchased wooden serving tray ... LISTEN ABOVE. .
The coffee berry borer is considered the most destructive insect pest plaguing the coffee industry worldwide ... “Everybody has problems with the coffee borer,” said Mark Petersen, president of the KonaCoffee Farmers Association.
Capital Press
06 Sep 2024
Capital Press
06 Sep 2024