Investigation on the Ground Pressure Induced by Hard Roof Fracturing at Different Layers during Extra Thick Coal Seam Mining
The fracturing of hard roofs in different layers would result in complex ground pressure on the working face, such as supports collapsed and severe roadway deformation. However, the mechanism of the ground pressure induced by hard roof fracturing in different layers is still unclear. In the paper, a...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/8834235 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832558442460479488 |
|---|---|
| author | Rui Gao Jingxuan Yang Tiejun Kuang Hongjie Liu |
| author_facet | Rui Gao Jingxuan Yang Tiejun Kuang Hongjie Liu |
| author_sort | Rui Gao |
| collection | DOAJ |
| description | The fracturing of hard roofs in different layers would result in complex ground pressure on the working face, such as supports collapsed and severe roadway deformation. However, the mechanism of the ground pressure induced by hard roof fracturing in different layers is still unclear. In the paper, a physical model of a 20 m extrathick coal seam mined with hard roofs existing was established based on the physical simulation similarity criterion. The overburden fracturing structure, abutment stress distribution, and failure characteristics of the coal body were monitored by a noncontact strain measurement system and resistance strain gauges, to reveal the mechanism of ground pressure induced by hard roof fracturing. Furthermore, on-site measurement was used to monitor and analyze the ground pressure affected by hard roofs in different levels. The results provide a theoretical basis for the control of ground pressure in extrathick coal seam mining with hard roofs. |
| format | Article |
| id | doaj-art-397859457c874dd0a8fbd7d8f275076d |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-397859457c874dd0a8fbd7d8f275076d2025-02-03T01:32:24ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/88342358834235Investigation on the Ground Pressure Induced by Hard Roof Fracturing at Different Layers during Extra Thick Coal Seam MiningRui Gao0Jingxuan Yang1Tiejun Kuang2Hongjie Liu3College of Mining Engineering, Taiyuan University of Technology, Shanxi 030024, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining & Technology, Xuzhou 221116, ChinaDatong Coal Mine Group Co. Ltd., Datong 037000, ChinaDatong Coal Mine Group Co. Ltd., Datong 037000, ChinaThe fracturing of hard roofs in different layers would result in complex ground pressure on the working face, such as supports collapsed and severe roadway deformation. However, the mechanism of the ground pressure induced by hard roof fracturing in different layers is still unclear. In the paper, a physical model of a 20 m extrathick coal seam mined with hard roofs existing was established based on the physical simulation similarity criterion. The overburden fracturing structure, abutment stress distribution, and failure characteristics of the coal body were monitored by a noncontact strain measurement system and resistance strain gauges, to reveal the mechanism of ground pressure induced by hard roof fracturing. Furthermore, on-site measurement was used to monitor and analyze the ground pressure affected by hard roofs in different levels. The results provide a theoretical basis for the control of ground pressure in extrathick coal seam mining with hard roofs.http://dx.doi.org/10.1155/2020/8834235 |
| spellingShingle | Rui Gao Jingxuan Yang Tiejun Kuang Hongjie Liu Investigation on the Ground Pressure Induced by Hard Roof Fracturing at Different Layers during Extra Thick Coal Seam Mining Geofluids |
| title | Investigation on the Ground Pressure Induced by Hard Roof Fracturing at Different Layers during Extra Thick Coal Seam Mining |
| title_full | Investigation on the Ground Pressure Induced by Hard Roof Fracturing at Different Layers during Extra Thick Coal Seam Mining |
| title_fullStr | Investigation on the Ground Pressure Induced by Hard Roof Fracturing at Different Layers during Extra Thick Coal Seam Mining |
| title_full_unstemmed | Investigation on the Ground Pressure Induced by Hard Roof Fracturing at Different Layers during Extra Thick Coal Seam Mining |
| title_short | Investigation on the Ground Pressure Induced by Hard Roof Fracturing at Different Layers during Extra Thick Coal Seam Mining |
| title_sort | investigation on the ground pressure induced by hard roof fracturing at different layers during extra thick coal seam mining |
| url | http://dx.doi.org/10.1155/2020/8834235 |
| work_keys_str_mv | AT ruigao investigationonthegroundpressureinducedbyhardrooffracturingatdifferentlayersduringextrathickcoalseammining AT jingxuanyang investigationonthegroundpressureinducedbyhardrooffracturingatdifferentlayersduringextrathickcoalseammining AT tiejunkuang investigationonthegroundpressureinducedbyhardrooffracturingatdifferentlayersduringextrathickcoalseammining AT hongjieliu investigationonthegroundpressureinducedbyhardrooffracturingatdifferentlayersduringextrathickcoalseammining |