Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle

Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle

Based on the research method of combining simulation analysis with field testing by distinct element process UDEC, we have analyzed the roof deformation and failure laws and roadway support technology of gob-side entry retaining in a thin seam with a large inclined angle. The results show that durin...

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Main Authors: Yongqin Zhang, Jianxin Tang, Daqiang Xiao, Lele Sun, Weizhong Zhang
Format: Article
Language:English
Published: Elsevier 2014-07-01
Series:International Journal of Mining Science and Technology
Online Access:http://www.sciencedirect.com/science/article/pii/S2095268614000779
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spelling doaj-3d68d73cd9854c1b9714e9f2216ae51b2020-11-24T20:57:13ZengElsevierInternational Journal of Mining Science and Technology2095-26862014-07-01244441445Spontaneous caving and gob-side entry retaining of thin seam with large inclined angleYongqin Zhang0Jianxin Tang1Daqiang Xiao2Lele Sun3Weizhong Zhang4State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China; Corresponding author. Tel.: +86 13368170503.State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, ChinaSichuan Dazhu Coal-Electricity Group Corporation, Dazhu 635000, ChinaZhangji Coal Mine Co. Ltd., Huainan Mining Group Co. Ltd., Huainan 232001, ChinaSchool of Environment and Civil Engineering, Wuhan Institute of Technology, Wuhan 430073, ChinaBased on the research method of combining simulation analysis with field testing by distinct element process UDEC, we have analyzed the roof deformation and failure laws and roadway support technology of gob-side entry retaining in a thin seam with a large inclined angle. The results show that during exploitation in seams with large inclined angle, rotational subsidence of the main roof under the gob area is small and can maintain balance, so there is no need to provide artificial permanent support resistance for the main roof near the upper side to control rotational subsidence. Obstructed by the dense scrap rail, waste rock from the immediate roof caving slides from the upper gob area to the lower area and fills it, which strikes a balance between the immediate roof under the goaf after it fractures into large pieces and filling waste rocks. Keywords: Large inclined angle, Gob-side entry retaining, Spontaneous caving, Thin seam, Field testhttp://www.sciencedirect.com/science/article/pii/S2095268614000779
collection DOAJ
language English
format Article
sources DOAJ
author Yongqin Zhang
Jianxin Tang
Daqiang Xiao
Lele Sun
Weizhong Zhang
spellingShingle Yongqin Zhang
Jianxin Tang
Daqiang Xiao
Lele Sun
Weizhong Zhang
Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle
International Journal of Mining Science and Technology
author_facet Yongqin Zhang
Jianxin Tang
Daqiang Xiao
Lele Sun
Weizhong Zhang
author_sort Yongqin Zhang
title Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle
title_short Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle
title_full Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle
title_fullStr Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle
title_full_unstemmed Spontaneous caving and gob-side entry retaining of thin seam with large inclined angle
title_sort spontaneous caving and gob-side entry retaining of thin seam with large inclined angle
publisher Elsevier
series International Journal of Mining Science and Technology
issn 2095-2686
publishDate 2014-07-01
description Based on the research method of combining simulation analysis with field testing by distinct element process UDEC, we have analyzed the roof deformation and failure laws and roadway support technology of gob-side entry retaining in a thin seam with a large inclined angle. The results show that during exploitation in seams with large inclined angle, rotational subsidence of the main roof under the gob area is small and can maintain balance, so there is no need to provide artificial permanent support resistance for the main roof near the upper side to control rotational subsidence. Obstructed by the dense scrap rail, waste rock from the immediate roof caving slides from the upper gob area to the lower area and fills it, which strikes a balance between the immediate roof under the goaf after it fractures into large pieces and filling waste rocks. Keywords: Large inclined angle, Gob-side entry retaining, Spontaneous caving, Thin seam, Field test
url http://www.sciencedirect.com/science/article/pii/S2095268614000779
work_keys_str_mv AT yongqinzhang spontaneouscavingandgobsideentryretainingofthinseamwithlargeinclinedangle
AT jianxintang spontaneouscavingandgobsideentryretainingofthinseamwithlargeinclinedangle
AT daqiangxiao spontaneouscavingandgobsideentryretainingofthinseamwithlargeinclinedangle
AT lelesun spontaneouscavingandgobsideentryretainingofthinseamwithlargeinclinedangle
AT weizhongzhang spontaneouscavingandgobsideentryretainingofthinseamwithlargeinclinedangle
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