Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone
Due to obvious differences in the properties of the filling body and surrounding rock, deformation always develops near the contact zone. Thus, determining the damage and failure characteristics of the contact zone between the backfill and surrounding rock is a precondition for safe production in mi...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-09-01
|
| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/15/19/6810 |
| _version_ | 1797478325586755584 |
|---|---|
| author | Guang Li Yang Wan Jie Guo Fengshan Ma Haijun Zhao Yanfang Wu |
| author_facet | Guang Li Yang Wan Jie Guo Fengshan Ma Haijun Zhao Yanfang Wu |
| author_sort | Guang Li |
| collection | DOAJ |
| description | Due to obvious differences in the properties of the filling body and surrounding rock, deformation always develops near the contact zone. Thus, determining the damage and failure characteristics of the contact zone between the backfill and surrounding rock is a precondition for safe production in mines. Taking Jinchuan mine as study area, the backfill-surrounding rock contact zones are divided into three models according to their different geometric shapes, namely, a linear model, embedded model, and multiple broken line model. A combined numerical simulation and physical model test method was adopted in this study. The research results show that the damage in the linear model begins at the seam, the failure is mainly concentrated in the filling body, and shear failure is dominant. The damage in the embedded model initially occurs around the inflection points, while the damage in the multiple broken line model initially occurs at the seams, and cracks always appear on the vertical contact surface first. Among the three contact models, the stability increases as follows: embedded > multiple broken line > linear. Moreover, the filling body enclosed by surrounding rock is the most stable, and the surrounding rock located in the footwall is more stable than the filling body located in the footwall. The conclusions of this study provide a theoretical basis for designing a mining scheme for Jinchuan mine and other mines with similar geological conditions and mining methods, and they provide a reference for studying the mechanical properties and stability of composite materials. |
| first_indexed | 2024-03-09T21:30:23Z |
| format | Article |
| id | doaj.art-550c168d26134bcbb92e87be76345a1f |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T21:30:23Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-550c168d26134bcbb92e87be76345a1f2023-11-23T20:57:10ZengMDPI AGMaterials1996-19442022-09-011519681010.3390/ma15196810Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact ZoneGuang Li0Yang Wan1Jie Guo2Fengshan Ma3Haijun Zhao4Yanfang Wu5Key Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Shale Gas and Geoengineering, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, ChinaDue to obvious differences in the properties of the filling body and surrounding rock, deformation always develops near the contact zone. Thus, determining the damage and failure characteristics of the contact zone between the backfill and surrounding rock is a precondition for safe production in mines. Taking Jinchuan mine as study area, the backfill-surrounding rock contact zones are divided into three models according to their different geometric shapes, namely, a linear model, embedded model, and multiple broken line model. A combined numerical simulation and physical model test method was adopted in this study. The research results show that the damage in the linear model begins at the seam, the failure is mainly concentrated in the filling body, and shear failure is dominant. The damage in the embedded model initially occurs around the inflection points, while the damage in the multiple broken line model initially occurs at the seams, and cracks always appear on the vertical contact surface first. Among the three contact models, the stability increases as follows: embedded > multiple broken line > linear. Moreover, the filling body enclosed by surrounding rock is the most stable, and the surrounding rock located in the footwall is more stable than the filling body located in the footwall. The conclusions of this study provide a theoretical basis for designing a mining scheme for Jinchuan mine and other mines with similar geological conditions and mining methods, and they provide a reference for studying the mechanical properties and stability of composite materials.https://www.mdpi.com/1996-1944/15/19/6810backfill miningcontact zoneJinchuan minedamagefailuremodel test |
| spellingShingle | Guang Li Yang Wan Jie Guo Fengshan Ma Haijun Zhao Yanfang Wu Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone Materials backfill mining contact zone Jinchuan mine damage failure model test |
| title | Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone |
| title_full | Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone |
| title_fullStr | Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone |
| title_full_unstemmed | Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone |
| title_short | Experimental Study of the Damage and Failure Characteristics of the Backfill-Surrounding Rock Contact Zone |
| title_sort | experimental study of the damage and failure characteristics of the backfill surrounding rock contact zone |
| topic | backfill mining contact zone Jinchuan mine damage failure model test |
| url | https://www.mdpi.com/1996-1944/15/19/6810 |
| work_keys_str_mv | AT guangli experimentalstudyofthedamageandfailurecharacteristicsofthebackfillsurroundingrockcontactzone AT yangwan experimentalstudyofthedamageandfailurecharacteristicsofthebackfillsurroundingrockcontactzone AT jieguo experimentalstudyofthedamageandfailurecharacteristicsofthebackfillsurroundingrockcontactzone AT fengshanma experimentalstudyofthedamageandfailurecharacteristicsofthebackfillsurroundingrockcontactzone AT haijunzhao experimentalstudyofthedamageandfailurecharacteristicsofthebackfillsurroundingrockcontactzone AT yanfangwu experimentalstudyofthedamageandfailurecharacteristicsofthebackfillsurroundingrockcontactzone |