Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face
The movement and destruction of the hard roof in a stope is an important reason for the occurrence of strong ground pressure disasters at the working face. Considering Tongxin Coal Mine as the engineering background, the stress distribution law of the surrounding rock and the overburden rock damage...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/8846624 |
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| _version_ | 1832567978167631872 |
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| author | Hongfei Duan Lijuan Zhao |
| author_facet | Hongfei Duan Lijuan Zhao |
| author_sort | Hongfei Duan |
| collection | DOAJ |
| description | The movement and destruction of the hard roof in a stope is an important reason for the occurrence of strong ground pressure disasters at the working face. Considering Tongxin Coal Mine as the engineering background, the stress distribution law of the surrounding rock and the overburden rock damage characteristics of a large-mining-height working face under the hard roof were investigated. To solve the problem whereby the stope’s hard roof is difficult to collapse, the hard rock key stratum of the roof was hydraulically fractured to weaken the mechanical properties of the roof rock stratum. Additionally, microseismic monitoring technology was used to monitor the cracking effect of the rock stratum. The theoretical calculation and numerical simulation results reveal that, after hydraulic fracturing, a crack with a more consistent trend formed inside the hard rock stratum and a large area of the rock stratum was damaged. According to the monitoring results of the stope stress after hydraulic fracturing, the law governing the occurrence of the leading bearing pressure was in effect. In contrast, the influence range and peak strength of the leading bearing pressure were considerably reduced at the working face after hydraulic fracturing. After performing hydraulic fracturing on the roof of the working face, the bearing pressure of the working face can satisfy the production requirements better. Finally, the results obtained through this study can be used as a reference for determining the width of coal pillars under similar mining conditions. |
| format | Article |
| id | doaj-art-f16a8b3d6ac747a7b997e8ca71bcc21d |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-f16a8b3d6ac747a7b997e8ca71bcc21d2025-02-03T01:00:12ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/88466248846624Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working FaceHongfei Duan0Lijuan Zhao1School of Coal Engineering, Datong University, Datong 037003, Shanxi, ChinaSchool of Coal Engineering, Datong University, Datong 037003, Shanxi, ChinaThe movement and destruction of the hard roof in a stope is an important reason for the occurrence of strong ground pressure disasters at the working face. Considering Tongxin Coal Mine as the engineering background, the stress distribution law of the surrounding rock and the overburden rock damage characteristics of a large-mining-height working face under the hard roof were investigated. To solve the problem whereby the stope’s hard roof is difficult to collapse, the hard rock key stratum of the roof was hydraulically fractured to weaken the mechanical properties of the roof rock stratum. Additionally, microseismic monitoring technology was used to monitor the cracking effect of the rock stratum. The theoretical calculation and numerical simulation results reveal that, after hydraulic fracturing, a crack with a more consistent trend formed inside the hard rock stratum and a large area of the rock stratum was damaged. According to the monitoring results of the stope stress after hydraulic fracturing, the law governing the occurrence of the leading bearing pressure was in effect. In contrast, the influence range and peak strength of the leading bearing pressure were considerably reduced at the working face after hydraulic fracturing. After performing hydraulic fracturing on the roof of the working face, the bearing pressure of the working face can satisfy the production requirements better. Finally, the results obtained through this study can be used as a reference for determining the width of coal pillars under similar mining conditions.http://dx.doi.org/10.1155/2020/8846624 |
| spellingShingle | Hongfei Duan Lijuan Zhao Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face Shock and Vibration |
| title | Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face |
| title_full | Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face |
| title_fullStr | Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face |
| title_full_unstemmed | Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face |
| title_short | Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face |
| title_sort | prevention technology for strong mine pressure disaster in the hard roof large mining height working face |
| url | http://dx.doi.org/10.1155/2020/8846624 |
| work_keys_str_mv | AT hongfeiduan preventiontechnologyforstrongminepressuredisasterinthehardrooflargeminingheightworkingface AT lijuanzhao preventiontechnologyforstrongminepressuredisasterinthehardrooflargeminingheightworkingface |