Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal Mining
It is an important problem for the alternated strong and weak roof weighting to threat the safety of working face during shallow coal mining and the total thickness breaking of the thin bedrock to cause the serious ground subsidence. To reveal the mechanism of the abnormal mining damage, the pressur...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
2018-01-01
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| Series: | Tehnički Vjesnik |
| Subjects: | |
| Online Access: | https://hrcak.srce.hr/file/304788 |
| _version_ | 1797207581392896000 |
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| author | Yanhai Zhao Shuren Wang Youfeng Zou Xuchun Wang Bingqiang Huang Xingui Zhang |
| author_facet | Yanhai Zhao Shuren Wang Youfeng Zou Xuchun Wang Bingqiang Huang Xingui Zhang |
| author_sort | Yanhai Zhao |
| collection | DOAJ |
| description | It is an important problem for the alternated strong and weak roof weighting to threat the safety of working face during shallow coal mining and the total thickness breaking of the thin bedrock to cause the serious ground subsidence. To reveal the mechanism of the abnormal mining damage, the pressure-arching rule in overlying strata was studied. Based on the monitoring data of the typical shallow coal working face, the mechanical models of the symmetrical stress arch, the squeezed arch and the hinged structure of the fractured strata were established, and the difference of the load bearing capacity between the structures and the influencing factors was analysed by the deduced formula calculation. Then the evolution characteristics of the pressure-arch in the fractured strata were revealed by the numerical simulation analysis. The results show that the global pressure-arch of multilayer strata always exits in the surrounding rock and moves forward with continuous mining. The single pressure-arch and hinged structure are formed in each stratum under the global pressure-arch. The pressure-arch enables the fractured strata to carry load efficiently, and the instability of the pressure-arch can cause strong roof weighting and ground subsidence. These conclusions provide a theoretical reference for the stability control of the overlying strata structure under shallow coal mining. |
| first_indexed | 2024-04-24T09:25:11Z |
| format | Article |
| id | doaj.art-eb9cf507be834f93aca712ebe33a5fe0 |
| institution | Directory Open Access Journal |
| issn | 1330-3651 1848-6339 |
| language | English |
| last_indexed | 2024-04-24T09:25:11Z |
| publishDate | 2018-01-01 |
| publisher | Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek |
| record_format | Article |
| series | Tehnički Vjesnik |
| spelling | doaj.art-eb9cf507be834f93aca712ebe33a5fe02024-04-15T15:06:09ZengFaculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in OsijekTehnički Vjesnik1330-36511848-63392018-01-012551457146610.17559/TV-20180925164754Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal MiningYanhai Zhao0Shuren Wang1Youfeng Zou2Xuchun Wang3Bingqiang Huang4Xingui Zhang5School of Civil Engineering, Henan Polytechnic University, 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China1) International Joint Research Laboratory of Henan Province for Underground Space Development and Disaster Prevention, Henan Polytechnic University, 2001 Century Avenue, Jiaozuo, Henan Province, 454003, China / 2) School of Mining Engineering, UniversitySchool of Surveying and Land Information Engineering, Henan Polytechnic University, 2001 Century Avenue, Jiaozuo, Henan Province, 454003, ChinaSchool of Civil Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao, Shandong Province, 266033, ChinaNanning Exploration & Survey Institute, 31-1 Chahuayuan Road, Nanning, Guangxi Province, 530022, ChinaCollege of Civil Engineering & Architecture, Guangxi University, 100 Daxue Road, Nanning, Guangxi Province, 530004, ChinaIt is an important problem for the alternated strong and weak roof weighting to threat the safety of working face during shallow coal mining and the total thickness breaking of the thin bedrock to cause the serious ground subsidence. To reveal the mechanism of the abnormal mining damage, the pressure-arching rule in overlying strata was studied. Based on the monitoring data of the typical shallow coal working face, the mechanical models of the symmetrical stress arch, the squeezed arch and the hinged structure of the fractured strata were established, and the difference of the load bearing capacity between the structures and the influencing factors was analysed by the deduced formula calculation. Then the evolution characteristics of the pressure-arch in the fractured strata were revealed by the numerical simulation analysis. The results show that the global pressure-arch of multilayer strata always exits in the surrounding rock and moves forward with continuous mining. The single pressure-arch and hinged structure are formed in each stratum under the global pressure-arch. The pressure-arch enables the fractured strata to carry load efficiently, and the instability of the pressure-arch can cause strong roof weighting and ground subsidence. These conclusions provide a theoretical reference for the stability control of the overlying strata structure under shallow coal mining.https://hrcak.srce.hr/file/304788horizontal stresspressure-archshallow coal miningstrata structure |
| spellingShingle | Yanhai Zhao Shuren Wang Youfeng Zou Xuchun Wang Bingqiang Huang Xingui Zhang Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal Mining Tehnički Vjesnik horizontal stress pressure-arch shallow coal mining strata structure |
| title | Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal Mining |
| title_full | Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal Mining |
| title_fullStr | Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal Mining |
| title_full_unstemmed | Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal Mining |
| title_short | Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal Mining |
| title_sort | pressure arching characteristics of fractured strata structure during shallow horizontal coal mining |
| topic | horizontal stress pressure-arch shallow coal mining strata structure |
| url | https://hrcak.srce.hr/file/304788 |
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