Rockburst mechanism in soft coal seam within deep coal mines

Rockburst mechanism in soft coal seam within deep coal mines

A number of rockburst accidents occurring in soft coal seams have shown that the rockburst mechanism involved in soft coal seams is significantly different from that involved in hard coal seams. Therefore, the method used to evaluate rockburst in hard coal seams is not applicable to soft coal seams....

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Main Authors: Junfei Zhang, Fuxing Jiang, Jianbo Yang, Wushuai Bai, Lei Zhang
Format: Article
Language:English
Published: Elsevier 2017-05-01
Series:International Journal of Mining Science and Technology
Online Access:http://www.sciencedirect.com/science/article/pii/S2095268617302355
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spelling doaj-8c790cd93daf4a86a0ce03582d6730f52020-11-24T20:56:59ZengElsevierInternational Journal of Mining Science and Technology2095-26862017-05-01273551556Rockburst mechanism in soft coal seam within deep coal minesJunfei Zhang0Fuxing Jiang1Jianbo Yang2Wushuai Bai3Lei Zhang4Corresponding author.; School of Civil and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, ChinaSchool of Civil and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, ChinaSchool of Civil and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, ChinaSchool of Civil and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, ChinaSchool of Civil and Environmental Engineering, University of Science & Technology Beijing, Beijing 100083, ChinaA number of rockburst accidents occurring in soft coal seams have shown that the rockburst mechanism involved in soft coal seams is significantly different from that involved in hard coal seams. Therefore, the method used to evaluate rockburst in hard coal seams is not applicable to soft coal seams. This paper established an energy integral model for the rockburst-inducing area and a friction work calculation model for the plastic area. If the remaining energy after the coal seam is broken in the rockburst-inducing area is greater than the friction work required for the coal to burst out, then a rockburst accident will occur. Mechanisms of “quaking without bursting” and “quaking and bursting” are clarified for soft coal seams and corresponding control measures are proposed as the optimization of roadway layouts and use of “three strong systems” (strong de-stressing, strong supporting, and strong monitoring). Keywords: Soft coal seam, Rockburst, Plastic zone, Elastic strain energy, Friction workhttp://www.sciencedirect.com/science/article/pii/S2095268617302355
collection DOAJ
language English
format Article
sources DOAJ
author Junfei Zhang
Fuxing Jiang
Jianbo Yang
Wushuai Bai
Lei Zhang
spellingShingle Junfei Zhang
Fuxing Jiang
Jianbo Yang
Wushuai Bai
Lei Zhang
Rockburst mechanism in soft coal seam within deep coal mines
International Journal of Mining Science and Technology
author_facet Junfei Zhang
Fuxing Jiang
Jianbo Yang
Wushuai Bai
Lei Zhang
author_sort Junfei Zhang
title Rockburst mechanism in soft coal seam within deep coal mines
title_short Rockburst mechanism in soft coal seam within deep coal mines
title_full Rockburst mechanism in soft coal seam within deep coal mines
title_fullStr Rockburst mechanism in soft coal seam within deep coal mines
title_full_unstemmed Rockburst mechanism in soft coal seam within deep coal mines
title_sort rockburst mechanism in soft coal seam within deep coal mines
publisher Elsevier
series International Journal of Mining Science and Technology
issn 2095-2686
publishDate 2017-05-01
description A number of rockburst accidents occurring in soft coal seams have shown that the rockburst mechanism involved in soft coal seams is significantly different from that involved in hard coal seams. Therefore, the method used to evaluate rockburst in hard coal seams is not applicable to soft coal seams. This paper established an energy integral model for the rockburst-inducing area and a friction work calculation model for the plastic area. If the remaining energy after the coal seam is broken in the rockburst-inducing area is greater than the friction work required for the coal to burst out, then a rockburst accident will occur. Mechanisms of “quaking without bursting” and “quaking and bursting” are clarified for soft coal seams and corresponding control measures are proposed as the optimization of roadway layouts and use of “three strong systems” (strong de-stressing, strong supporting, and strong monitoring). Keywords: Soft coal seam, Rockburst, Plastic zone, Elastic strain energy, Friction work
url http://www.sciencedirect.com/science/article/pii/S2095268617302355
work_keys_str_mv AT junfeizhang rockburstmechanisminsoftcoalseamwithindeepcoalmines
AT fuxingjiang rockburstmechanisminsoftcoalseamwithindeepcoalmines
AT jianboyang rockburstmechanisminsoftcoalseamwithindeepcoalmines
AT wushuaibai rockburstmechanisminsoftcoalseamwithindeepcoalmines
AT leizhang rockburstmechanisminsoftcoalseamwithindeepcoalmines
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