Fracture mechanics solution of confined water progressive intrusion height of mining fracture floor
In order to obtain the value of confined water progressive intrusion height of mining fracture floor, the analysis equation was deduced based on the fracture extension theory of the fracture mechanics. Furthermore, the influence of some parameters (e.g., advancing distance of working face, water pre...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2015-01-01
|
Series: | International Journal of Mining Science and Technology |
Online Access: | http://www.sciencedirect.com/science/article/pii/S2095268614001876 |
id |
doaj-633dfde68a0e488ba359695948f30ea9 |
---|---|
record_format |
Article |
spelling |
doaj-633dfde68a0e488ba359695948f30ea92020-11-24T22:11:52ZengElsevierInternational Journal of Mining Science and Technology2095-26862015-01-0125199106Fracture mechanics solution of confined water progressive intrusion height of mining fracture floorHaifeng Lu0Duoxi Yao1Dan Shen2Jiyang Cao3School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China; State Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Beijing 100083, China; Corresponding author. Tel.: +86 13625547128.School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, ChinaIn order to obtain the value of confined water progressive intrusion height of mining fracture floor, the analysis equation was deduced based on the fracture extension theory of the fracture mechanics. Furthermore, the influence of some parameters (e.g., advancing distance of working face, water pressure, initial fracture length and its angle) on confined water progressive intrusion height were analyzed. The results indicate that tension-shearing fracture of floor is extended more easily than compression-shearing fracture under the same conditions. When floor fracture dip angle is less than 90°, tension-shearing extension occurs more easily on the left edge of the goaf. If fracture dip angle is larger than 90°, it occurs more easily on the right edge of the goaf. The longer the advancing distance of working face is, the greater initial fracture length goes; or the larger water pressure is, the greater possibility of tension-shearing extension occurs. The confined water progressive intrusion height reaches the maximum on the edge of the goaf. Field in situ test is consistent with the theoretical analysis result. Keywords: Tension-shearing fracture, Compression-shearing fracture, Confined water progressive intrusion, Floor water invasionhttp://www.sciencedirect.com/science/article/pii/S2095268614001876 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Haifeng Lu Duoxi Yao Dan Shen Jiyang Cao |
spellingShingle |
Haifeng Lu Duoxi Yao Dan Shen Jiyang Cao Fracture mechanics solution of confined water progressive intrusion height of mining fracture floor International Journal of Mining Science and Technology |
author_facet |
Haifeng Lu Duoxi Yao Dan Shen Jiyang Cao |
author_sort |
Haifeng Lu |
title |
Fracture mechanics solution of confined water progressive intrusion height of mining fracture floor |
title_short |
Fracture mechanics solution of confined water progressive intrusion height of mining fracture floor |
title_full |
Fracture mechanics solution of confined water progressive intrusion height of mining fracture floor |
title_fullStr |
Fracture mechanics solution of confined water progressive intrusion height of mining fracture floor |
title_full_unstemmed |
Fracture mechanics solution of confined water progressive intrusion height of mining fracture floor |
title_sort |
fracture mechanics solution of confined water progressive intrusion height of mining fracture floor |
publisher |
Elsevier |
series |
International Journal of Mining Science and Technology |
issn |
2095-2686 |
publishDate |
2015-01-01 |
description |
In order to obtain the value of confined water progressive intrusion height of mining fracture floor, the analysis equation was deduced based on the fracture extension theory of the fracture mechanics. Furthermore, the influence of some parameters (e.g., advancing distance of working face, water pressure, initial fracture length and its angle) on confined water progressive intrusion height were analyzed. The results indicate that tension-shearing fracture of floor is extended more easily than compression-shearing fracture under the same conditions. When floor fracture dip angle is less than 90°, tension-shearing extension occurs more easily on the left edge of the goaf. If fracture dip angle is larger than 90°, it occurs more easily on the right edge of the goaf. The longer the advancing distance of working face is, the greater initial fracture length goes; or the larger water pressure is, the greater possibility of tension-shearing extension occurs. The confined water progressive intrusion height reaches the maximum on the edge of the goaf. Field in situ test is consistent with the theoretical analysis result. Keywords: Tension-shearing fracture, Compression-shearing fracture, Confined water progressive intrusion, Floor water invasion |
url |
http://www.sciencedirect.com/science/article/pii/S2095268614001876 |
work_keys_str_mv |
AT haifenglu fracturemechanicssolutionofconfinedwaterprogressiveintrusionheightofminingfracturefloor AT duoxiyao fracturemechanicssolutionofconfinedwaterprogressiveintrusionheightofminingfracturefloor AT danshen fracturemechanicssolutionofconfinedwaterprogressiveintrusionheightofminingfracturefloor AT jiyangcao fracturemechanicssolutionofconfinedwaterprogressiveintrusionheightofminingfracturefloor |
_version_ |
1725803900594814976 |