Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam

Luying Shao; Bingxiang Huang; Xinglong Zhao

doi:doi:10.11648/j.ogce.20200805.11

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Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam

Luying Shao, Bingxiang Huang, Xinglong Zhao

Published in International Journal of Oil, Gas and Coal Engineering (Volume 8, Issue 5)

Received: 31 August 2020 Accepted: 14 September 2020 Published: 23 September 2020

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Abstract

In order to solve the problems of stress concentration and large deformation of surrounding rock of secondary gob-side entry retaining in thin coal seam caused by hard overhanging roof, the method of cutting off overhanging roof on both sides of roadway by manual pre-cutting seam is adopted. It can transfer high stress to goaf on both sides of roadway and reduce roadway deformation. The mechanism of roadway formation, the conditions of double side overhanging roof subsidence and the stress reduction of roadway side support of secondary gob-side entry retaining after double side roof cutting are given. This paper studies the pressure relief law of secondary gob side entry retaining after double side roof cutting in thin coal seam. After double side roof cutting, the stress of roadway side support is reduced by 76%, the maximum vertical displacement of roof is reduced by 84%, and high stress is transferred to goaf. The influence of different double side roof cutting thickness and angle on the pressure relief effect is analyzed. On the premise that the collapsed gangue can fill the goaf, the smaller the thickness of double side roof cutting is, the better the pressure relief effect is, and the greater the double side roof cutting angle is, the better the pressure relief effect is. It has been successfully applied in the left five roadway of No. 69 coal seam in Xinqiang coal mine, and the deformation of roof and floor is reduced by 47% and the deformation of two sides is reduced by 56% after double side roof cutting. It has important reference value for the future secondary gob-side entry retaining.

Published in	International Journal of Oil, Gas and Coal Engineering (Volume 8, Issue 5)
DOI	10.11648/j.ogce.20200805.11
Page(s)	91-102
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2020. Published by Science Publishing Group

Keywords

High Stress, Mining Influence, Double Side Roof Cutting, Secondary Gob-side Entry Retaining, Stress Transfer

References

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APA Style

Luying Shao, Bingxiang Huang, Xinglong Zhao. (2020). Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam. International Journal of Oil, Gas and Coal Engineering, 8(5), 91-102. https://doi.org/10.11648/j.ogce.20200805.11

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ACS Style

Luying Shao; Bingxiang Huang; Xinglong Zhao. Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam. Int. J. Oil Gas Coal Eng. 2020, 8(5), 91-102. doi: 10.11648/j.ogce.20200805.11

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AMA Style

Luying Shao, Bingxiang Huang, Xinglong Zhao. Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam. Int J Oil Gas Coal Eng. 2020;8(5):91-102. doi: 10.11648/j.ogce.20200805.11

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@article{10.11648/j.ogce.20200805.11,
  author = {Luying Shao and Bingxiang Huang and Xinglong Zhao},
  title = {Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam},
  journal = {International Journal of Oil, Gas and Coal Engineering},
  volume = {8},
  number = {5},
  pages = {91-102},
  doi = {10.11648/j.ogce.20200805.11},
  url = {https://doi.org/10.11648/j.ogce.20200805.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20200805.11},
  abstract = {In order to solve the problems of stress concentration and large deformation of surrounding rock of secondary gob-side entry retaining in thin coal seam caused by hard overhanging roof, the method of cutting off overhanging roof on both sides of roadway by manual pre-cutting seam is adopted. It can transfer high stress to goaf on both sides of roadway and reduce roadway deformation. The mechanism of roadway formation, the conditions of double side overhanging roof subsidence and the stress reduction of roadway side support of secondary gob-side entry retaining after double side roof cutting are given. This paper studies the pressure relief law of secondary gob side entry retaining after double side roof cutting in thin coal seam. After double side roof cutting, the stress of roadway side support is reduced by 76%, the maximum vertical displacement of roof is reduced by 84%, and high stress is transferred to goaf. The influence of different double side roof cutting thickness and angle on the pressure relief effect is analyzed. On the premise that the collapsed gangue can fill the goaf, the smaller the thickness of double side roof cutting is, the better the pressure relief effect is, and the greater the double side roof cutting angle is, the better the pressure relief effect is. It has been successfully applied in the left five roadway of No. 69 coal seam in Xinqiang coal mine, and the deformation of roof and floor is reduced by 47% and the deformation of two sides is reduced by 56% after double side roof cutting. It has important reference value for the future secondary gob-side entry retaining.},
 year = {2020}
}

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TY  - JOUR
T1  - Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam
AU  - Luying Shao
AU  - Bingxiang Huang
AU  - Xinglong Zhao
Y1  - 2020/09/23
PY  - 2020
N1  - https://doi.org/10.11648/j.ogce.20200805.11
DO  - 10.11648/j.ogce.20200805.11
T2  - International Journal of Oil, Gas and Coal Engineering
JF  - International Journal of Oil, Gas and Coal Engineering
JO  - International Journal of Oil, Gas and Coal Engineering
SP  - 91
EP  - 102
PB  - Science Publishing Group
SN  - 2376-7677
UR  - https://doi.org/10.11648/j.ogce.20200805.11
AB  - In order to solve the problems of stress concentration and large deformation of surrounding rock of secondary gob-side entry retaining in thin coal seam caused by hard overhanging roof, the method of cutting off overhanging roof on both sides of roadway by manual pre-cutting seam is adopted. It can transfer high stress to goaf on both sides of roadway and reduce roadway deformation. The mechanism of roadway formation, the conditions of double side overhanging roof subsidence and the stress reduction of roadway side support of secondary gob-side entry retaining after double side roof cutting are given. This paper studies the pressure relief law of secondary gob side entry retaining after double side roof cutting in thin coal seam. After double side roof cutting, the stress of roadway side support is reduced by 76%, the maximum vertical displacement of roof is reduced by 84%, and high stress is transferred to goaf. The influence of different double side roof cutting thickness and angle on the pressure relief effect is analyzed. On the premise that the collapsed gangue can fill the goaf, the smaller the thickness of double side roof cutting is, the better the pressure relief effect is, and the greater the double side roof cutting angle is, the better the pressure relief effect is. It has been successfully applied in the left five roadway of No. 69 coal seam in Xinqiang coal mine, and the deformation of roof and floor is reduced by 47% and the deformation of two sides is reduced by 56% after double side roof cutting. It has important reference value for the future secondary gob-side entry retaining.
VL  - 8
IS  - 5
ER  -

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Author Information

Luying Shao

State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, China
Bingxiang Huang

State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, China
Xinglong Zhao

State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, China

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Plain Text BibTeX RIS

APA Style

Luying Shao, Bingxiang Huang, Xinglong Zhao. (2020). Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam. International Journal of Oil, Gas and Coal Engineering, 8(5), 91-102. https://doi.org/10.11648/j.ogce.20200805.11

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ACS Style

Luying Shao; Bingxiang Huang; Xinglong Zhao. Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam. Int. J. Oil Gas Coal Eng. 2020, 8(5), 91-102. doi: 10.11648/j.ogce.20200805.11

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AMA Style

Luying Shao, Bingxiang Huang, Xinglong Zhao. Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam. Int J Oil Gas Coal Eng. 2020;8(5):91-102. doi: 10.11648/j.ogce.20200805.11

Copy | Download

@article{10.11648/j.ogce.20200805.11,
  author = {Luying Shao and Bingxiang Huang and Xinglong Zhao},
  title = {Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam},
  journal = {International Journal of Oil, Gas and Coal Engineering},
  volume = {8},
  number = {5},
  pages = {91-102},
  doi = {10.11648/j.ogce.20200805.11},
  url = {https://doi.org/10.11648/j.ogce.20200805.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ogce.20200805.11},
  abstract = {In order to solve the problems of stress concentration and large deformation of surrounding rock of secondary gob-side entry retaining in thin coal seam caused by hard overhanging roof, the method of cutting off overhanging roof on both sides of roadway by manual pre-cutting seam is adopted. It can transfer high stress to goaf on both sides of roadway and reduce roadway deformation. The mechanism of roadway formation, the conditions of double side overhanging roof subsidence and the stress reduction of roadway side support of secondary gob-side entry retaining after double side roof cutting are given. This paper studies the pressure relief law of secondary gob side entry retaining after double side roof cutting in thin coal seam. After double side roof cutting, the stress of roadway side support is reduced by 76%, the maximum vertical displacement of roof is reduced by 84%, and high stress is transferred to goaf. The influence of different double side roof cutting thickness and angle on the pressure relief effect is analyzed. On the premise that the collapsed gangue can fill the goaf, the smaller the thickness of double side roof cutting is, the better the pressure relief effect is, and the greater the double side roof cutting angle is, the better the pressure relief effect is. It has been successfully applied in the left five roadway of No. 69 coal seam in Xinqiang coal mine, and the deformation of roof and floor is reduced by 47% and the deformation of two sides is reduced by 56% after double side roof cutting. It has important reference value for the future secondary gob-side entry retaining.},
 year = {2020}
}

Copy | Download

TY  - JOUR
T1  - Secondary Gob-side Entry Retaining Technology with Double Side Roof Cutting and Pressure Relief in Thin Coal Seam
AU  - Luying Shao
AU  - Bingxiang Huang
AU  - Xinglong Zhao
Y1  - 2020/09/23
PY  - 2020
N1  - https://doi.org/10.11648/j.ogce.20200805.11
DO  - 10.11648/j.ogce.20200805.11
T2  - International Journal of Oil, Gas and Coal Engineering
JF  - International Journal of Oil, Gas and Coal Engineering
JO  - International Journal of Oil, Gas and Coal Engineering
SP  - 91
EP  - 102
PB  - Science Publishing Group
SN  - 2376-7677
UR  - https://doi.org/10.11648/j.ogce.20200805.11
AB  - In order to solve the problems of stress concentration and large deformation of surrounding rock of secondary gob-side entry retaining in thin coal seam caused by hard overhanging roof, the method of cutting off overhanging roof on both sides of roadway by manual pre-cutting seam is adopted. It can transfer high stress to goaf on both sides of roadway and reduce roadway deformation. The mechanism of roadway formation, the conditions of double side overhanging roof subsidence and the stress reduction of roadway side support of secondary gob-side entry retaining after double side roof cutting are given. This paper studies the pressure relief law of secondary gob side entry retaining after double side roof cutting in thin coal seam. After double side roof cutting, the stress of roadway side support is reduced by 76%, the maximum vertical displacement of roof is reduced by 84%, and high stress is transferred to goaf. The influence of different double side roof cutting thickness and angle on the pressure relief effect is analyzed. On the premise that the collapsed gangue can fill the goaf, the smaller the thickness of double side roof cutting is, the better the pressure relief effect is, and the greater the double side roof cutting angle is, the better the pressure relief effect is. It has been successfully applied in the left five roadway of No. 69 coal seam in Xinqiang coal mine, and the deformation of roof and floor is reduced by 47% and the deformation of two sides is reduced by 56% after double side roof cutting. It has important reference value for the future secondary gob-side entry retaining.
VL  - 8
IS  - 5
ER  -

Copy | Download