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Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining

In mining process, the height of water flowing fractured zone is important significance to prevent mine of water and gas, in order to further research the failure characteristic of the overlying strata. Taking certain coal mine with 5.82 m mining height as the experimental face, by using the equipme...

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Main Authors: Wang, Xiaolei, Qin, Qirong, Fan, Cunhui
Format: Article
Language:English
Published: Penerbit Universiti Kebangsaan Malaysia 2017
Online Access:http://journalarticle.ukm.my/11670/1/04%20SM46%2011.pdf
http://journalarticle.ukm.my/11670/
http://www.ukm.my/jsm/english_journals/vol46num11_2017/contentsVol46num11_2017.htm
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spelling my-ukm.journal.116702018-05-28T00:43:16Z http://journalarticle.ukm.my/11670/ Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining Wang, Xiaolei Qin, Qirong Fan, Cunhui In mining process, the height of water flowing fractured zone is important significance to prevent mine of water and gas, in order to further research the failure characteristic of the overlying strata. Taking certain coal mine with 5.82 m mining height as the experimental face, by using the equipment which is sealed two ends by capsules in borehole, affused measurable water between the two capsules and borehole televiewer system, ground penetrating radar, microseismic monitoring system in underground coal mine, the height of water flowing fractured zone of fully-mechanized top caving are monitored, a numerical simulation experiment on the failure process was conducted, a similarity simulation experiment on the cracks evolution was conducted, at the same time, empirical formula of traditional was modified, The results showed that the height of caving and fractured zones were respectively 43.1 and 86.7 m in fully mechanized sub-level caving mining. The data difference of each test method of caving, fractured and water flowing fractured zones were respectively less than 4.5%, 7.1% and 9.0%. The degree of fracture development was low before mining, the number of fissures was obviously increased after mining, the degree of fracture development increased. The fractures cluster region mainly focuses near the coal wall. The fractures density distribution curves of overlying strata like sanke-shapes. The new and adapt to certain coal mine geological conditions empirical formula of water flowing fractured zone height is proposed. Penerbit Universiti Kebangsaan Malaysia 2017-11 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/11670/1/04%20SM46%2011.pdf Wang, Xiaolei and Qin, Qirong and Fan, Cunhui (2017) Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining. Sains Malaysiana, 46 (11). pp. 2041-2048. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol46num11_2017/contentsVol46num11_2017.htm
institution Universiti Kebangsaan Malaysia
building Perpustakaan Tun Sri Lanang Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Kebangsaan Malaysia
content_source UKM Journal Article Repository
url_provider http://journalarticle.ukm.my/
language English
description In mining process, the height of water flowing fractured zone is important significance to prevent mine of water and gas, in order to further research the failure characteristic of the overlying strata. Taking certain coal mine with 5.82 m mining height as the experimental face, by using the equipment which is sealed two ends by capsules in borehole, affused measurable water between the two capsules and borehole televiewer system, ground penetrating radar, microseismic monitoring system in underground coal mine, the height of water flowing fractured zone of fully-mechanized top caving are monitored, a numerical simulation experiment on the failure process was conducted, a similarity simulation experiment on the cracks evolution was conducted, at the same time, empirical formula of traditional was modified, The results showed that the height of caving and fractured zones were respectively 43.1 and 86.7 m in fully mechanized sub-level caving mining. The data difference of each test method of caving, fractured and water flowing fractured zones were respectively less than 4.5%, 7.1% and 9.0%. The degree of fracture development was low before mining, the number of fissures was obviously increased after mining, the degree of fracture development increased. The fractures cluster region mainly focuses near the coal wall. The fractures density distribution curves of overlying strata like sanke-shapes. The new and adapt to certain coal mine geological conditions empirical formula of water flowing fractured zone height is proposed.
format Article
author Wang, Xiaolei
Qin, Qirong
Fan, Cunhui
spellingShingle Wang, Xiaolei
Qin, Qirong
Fan, Cunhui
Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining
author_facet Wang, Xiaolei
Qin, Qirong
Fan, Cunhui
author_sort Wang, Xiaolei
title Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining
title_short Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining
title_full Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining
title_fullStr Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining
title_full_unstemmed Failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining
title_sort failure characteristic and fracture evolution law of overburden of thick coal in fully mechanized sub-level caving mining
publisher Penerbit Universiti Kebangsaan Malaysia
publishDate 2017
url http://journalarticle.ukm.my/11670/1/04%20SM46%2011.pdf
http://journalarticle.ukm.my/11670/
http://www.ukm.my/jsm/english_journals/vol46num11_2017/contentsVol46num11_2017.htm
_version_ 1643738567104528384
score 13.211869

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