Propagation of the discharge wave in the face zone of a coal seam and its relation to rock bursts

Afferents present in the distal hypoglossal nerve of the rhesus monkey include fibers derived from lingual muscle spindles. Using the evoked-potential technique in rhesus monkeys, the objective of this study was to determine whether the medial lemniscus (ML) represents the rostral projection path for hypoglossal afferent information. Responses evoked by low-intensity stimulation of the XIIth nerve were recorded with bipolar macroelectrodes at medullary, pontine, and midbrain levels in pentobarbital or urethane anesthestized animals. Results indicate that fibers related to XIIth nerve afferents ascend in association with the contralateral ML. This projection mediates the contralateral thalamic and cerebrocortical potentials shown in previous studies to be evoked bv XIIth nerve stimuli. The role this projection may play in tongue sensorimotor function is discussed. Results also demonstrate the presence of contralateral responses in the medial portion of the pontine reticulotegmental nucleus. These medially located potentials were isolated from responses evoked from the ML bv intervening unresponsive electrode tracks suggesting that a component of the lemniscal projection may terminate in the "face zone" of this precerebellar relay nucleus.

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Gas movement in the near-face zone of a coal seam during sudden squeeze

Soviet Mining Science ◽

10.1007/bf02499454 ◽

1990 ◽

Vol 26 (6) ◽

pp. 548-552 ◽

Cited By ~ 2

Author(s):

S. V. Kuznetsov ◽

V. A. Trofimov

Keyword(s):

Coal Seam ◽

Face Zone

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MANAGEMENT OF THE ROOF COAL BY ITS DISINTEGRATION DURING THE DEVELOPMENT OF THE COAL SEAM BY DRAWING IT ONTO THE FACE CONVEYOR

Vestnik of Kuzbass State Technical University ◽

10.26730/1999-4125-2021-4-77-85 ◽

2021 ◽

pp. 77-85

Author(s):

Boris A. Anfyorov ◽

Lyudmila V. Kuznetsova

Keyword(s):

Coal Seam ◽

The Face

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Roadway Stagger Layout for Effective Control of Gob-Side Rock Bursts in the Longwall Mining of a Thick Coal Seam

Rock Mechanics and Rock Engineering ◽

10.1007/s00603-015-0746-6 ◽

2015 ◽

Vol 49 (2) ◽

pp. 621-629 ◽

Cited By ~ 35

Author(s):

Zhen-lei Li ◽

Lin-ming Dou ◽

Wu Cai ◽

Gui-feng Wang ◽

Yan-lu Ding ◽

...

Keyword(s):

Coal Seam ◽

Longwall Mining ◽

Effective Control ◽

Thick Coal Seam ◽

Rock Bursts ◽

Side Rock

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Estimate of the length of the plastic zone at the face of a coal seam being worked

Soviet Mining Science ◽

10.1007/bf02509464 ◽

1974 ◽

Vol 10 (3) ◽

pp. 272-276 ◽

Cited By ~ 1

Author(s):

N. S. Khapilova

Keyword(s):

Plastic Zone ◽

Coal Seam ◽

The Face

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Study on the Relationship between Hydraulic Support on the Working Face with Large Mining Height and Surrounding Rock

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.328-330.1671 ◽

2011 ◽

Vol 328-330 ◽

pp. 1671-1674

Author(s):

Ying Ma ◽

Sheng Zhong

Keyword(s):

Coal Seam ◽

Surrounding Rock ◽

Hydraulic Support ◽

Working Face ◽

Safety Work ◽

Immediate Roof ◽

The Face ◽

Large Mining Height ◽

The Relationship ◽

Mining Height

Using unified model and theory of rock pressure, the problems, such as caving of stope roof with large mining height and destruction of support, strata movement and surface subsidence, are unified analyzed and researched. The results show that: pressure shell is dynamic shell, which moves forward with the propulsion of working face; with the increase of mining height on the face, the height of fracture zone in coal seam increases, not continuously, but jumpily; with the increase of mining height, support load rises, but the degree of this rise decreases gradually, increased degree of immediate roof weight should be greater than that of given deformation pressure. The results provide necessary basis for reliability of hydraulic support on the working face with large mining height and safety work in the underground.

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