A schematic overview of the machinery used irony a raised boring.
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.[1] One impressive use of raise boring is the 7.1 m diameter shafts for Sasol's Middelbult and Bosjesspruit Mines in South Africa.[2]
The boxhole borer (or machine roger) is a variant of a raise borer that is used when there is not enough space on the higher of the two levels to be connected. The boxhole borer is set up on the lower level, drills a pilot hole as a guide, then drives the reamer bit along the pilot hole from the lower level to the upper. Precautions have to be taken to redirect falling drill cuttings away from the machine, and to reinforce the drill string.
^Puhakka, Tulla (1997). Underground Drilling and Loading Handbook. Finland: Tamrock Corporation. pp. 186–187.
A raiseborer 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...
common furniture borer Woodboring beetles Cork borer, a tool of the chemistry laboratory Raiseborer, a mining machine Instep borer, an instrument of...
The wharf borer, Nacerdes melanura, belongs to the insect order Coleoptera, the beetles. They belong to the family Oedemeridae, known as false blister...
way for permanent piping. With the advancements made in raise boring technology, raiseborers have been used to create a pilot hole for shaft sinking...
hole for the raiseborer commenced. Using the normal procedure for this machinery, a pilot hole was drilled, for the larger diameter borer to follow. This...
and is considered a pest and known by the common name coffee white stem borer. Because the larvae damage the plant while being hidden inside the woody...
the opening systems for chimneys (raises) were complex and dangerous. With the acquisition in 1974 of a raiseborer, the spacing between levels (level...
emerald ash borer is found in Oregon for first time". Oregon Department of Forestry. July 11, 2022. Retrieved July 21, 2022. "Emerald Ash Borer Readiness...
as the diaprepes root weevil, citrus root weevil and sugarcane rootstock borer weevil, is a species of weevil that is native to the Caribbean, where in...
Xyleborinus saxesenii, commonly known as the fruit-tree pinhole borer, is a species of ambrosia beetle in the family Curculionidae. It is native to the...
Ostrinia scapulalis, the adzuki bean borer or adzuki bean worm, is a species of moth in the family Crambidae. It was described by Francis Walker in 1859...
has become increasingly unattractive due to pests and diseases. The pod borer Maruca vitrata is the most severe among those, with some farmers losing...
House of Representatives, representing District 115. Born and raised in West Haven, Borer received her B.S. in Business Administration and Management at...
in the 1780 drawing, when the mainspring was fully wound a lever K was raised that entered a hole N in the weight to prevent it from moving until the...
glossy iridescent colors. Larvae of this family are known as flatheaded borers. The family is among the largest of the beetles, with some 15,500 species...
Oemona hirta, the lemon tree borer, also known as the whistling beetle or the singing beetle, is a longhorn beetle endemic to New Zealand. Its larvae...
the field of zoomusicology, with her work on soft song in the Asian corn borer moth (Ostrinia furnacalis) and its relationship to the initiation of mating...
gardening, although GM corn is not considered organic. The European corn borer causes about a billion dollars in damage to corn crops each year. In recent...
Africa have fallen victim to a species of noctuid moth, the Agapanthus borer, Neuranethes spodopterodes. The larvae of the moth bore into the budding...
Stromatium barbatum (common names: teak trunk borer and Kulsi teak borer) is a species of beetle in the family Cerambycidae. This species is native to...
particularly those made of teak, a dense wood that seems to have resisted the borers. The first-class reception area off the ship's Grand Staircase is still...
production of cowpea, sometimes causing over 90% loss in yield. The legume pod borer Maruca vitrata is the main preharvest pest of the cowpea and the cowpea...
decelerator Enema Gag Garrote Head crusher Heretic's fork (Use disputed) Instep borer Iron Apega Iron chair Iron maiden (Use disputed) Jiagun / Zanzhi Judas cradle...
restored and improved since. The jetty has survived Cyclone Alby in 1978, borers, weathering, several fires, and the threat of demolition, to have become...
Works Garcia, Evan (7 April 2016). "More Pileated Woodpeckers: Emerald Ash Borer or Healthier Habitat?". Chicago Tonight. Retrieved 28 August 2018. "Pileated...
due to decreased populations of their pest host European corn borer; European corn borer is a target of Lepidoptera active Bt maize. Biogeochemical parameters...
unusable (dead) detector. However in 1997, Vittorio Giulio Palmieri, Kurt Borer, Stefan Janos, Cinzia Da Viá and Luca Casagrande at the University of Bern...
Global Information