Investigation of Seepage Law in Broken Coal and Rock Mass under Different Loading and Unloading Cycles
In order to study the seepage law of broken coal seams affected by multiple mining operations, a cyclic loading and unloading seepage experiment was carried out. For this purpose, the seepage law of broken samples with different coal and rock ratios was analyzed. The results of our study demonstrate...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
|
| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/8127250 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850167497321349120 |
|---|---|
| author | Zihao Kan Lei Zhang Mingxue Li Xiaochuan Yuan Mengqian Huang |
| author_facet | Zihao Kan Lei Zhang Mingxue Li Xiaochuan Yuan Mengqian Huang |
| author_sort | Zihao Kan |
| collection | DOAJ |
| description | In order to study the seepage law of broken coal seams affected by multiple mining operations, a cyclic loading and unloading seepage experiment was carried out. For this purpose, the seepage law of broken samples with different coal and rock ratios was analyzed. The results of our study demonstrated that the permeability of the broken samples showed a decreasing trend. After a loading and unloading cycle, the permeability was significantly reduced. The impact of the loading stage on the broken sample was higher than that of the unloading phase. When the proportion of coal particles in the mixed samples of broken coal and rock was 50%, the irreversible permeability loss rate and permeability loss rate of the samples showed the highest values. The irreversible permeability loss rate and permeability loss rate of the broken rock mass were greater than those displayed by the broken coal mass. The stress sensitivity coefficient curves of the 5 types of broken coal and rock masses presented the same changes. The stress sensitivity coefficient curve and the effective stress displayed an exponential relationship. |
| format | Article |
| id | doaj-art-d98f8f7fc4e9445ab1a870b552ec6f19 |
| institution | OA Journals |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-d98f8f7fc4e9445ab1a870b552ec6f192025-08-20T02:21:12ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/81272508127250Investigation of Seepage Law in Broken Coal and Rock Mass under Different Loading and Unloading CyclesZihao Kan0Lei Zhang1Mingxue Li2Xiaochuan Yuan3Mengqian Huang4School of Mines, State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Materials Science and Physics, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaShaanxi Yubei Coal Industry Xiaobaodang Mining Co. Ltd., Yulin, Shaanxi 719300, ChinaIn order to study the seepage law of broken coal seams affected by multiple mining operations, a cyclic loading and unloading seepage experiment was carried out. For this purpose, the seepage law of broken samples with different coal and rock ratios was analyzed. The results of our study demonstrated that the permeability of the broken samples showed a decreasing trend. After a loading and unloading cycle, the permeability was significantly reduced. The impact of the loading stage on the broken sample was higher than that of the unloading phase. When the proportion of coal particles in the mixed samples of broken coal and rock was 50%, the irreversible permeability loss rate and permeability loss rate of the samples showed the highest values. The irreversible permeability loss rate and permeability loss rate of the broken rock mass were greater than those displayed by the broken coal mass. The stress sensitivity coefficient curves of the 5 types of broken coal and rock masses presented the same changes. The stress sensitivity coefficient curve and the effective stress displayed an exponential relationship.http://dx.doi.org/10.1155/2021/8127250 |
| spellingShingle | Zihao Kan Lei Zhang Mingxue Li Xiaochuan Yuan Mengqian Huang Investigation of Seepage Law in Broken Coal and Rock Mass under Different Loading and Unloading Cycles Geofluids |
| title | Investigation of Seepage Law in Broken Coal and Rock Mass under Different Loading and Unloading Cycles |
| title_full | Investigation of Seepage Law in Broken Coal and Rock Mass under Different Loading and Unloading Cycles |
| title_fullStr | Investigation of Seepage Law in Broken Coal and Rock Mass under Different Loading and Unloading Cycles |
| title_full_unstemmed | Investigation of Seepage Law in Broken Coal and Rock Mass under Different Loading and Unloading Cycles |
| title_short | Investigation of Seepage Law in Broken Coal and Rock Mass under Different Loading and Unloading Cycles |
| title_sort | investigation of seepage law in broken coal and rock mass under different loading and unloading cycles |
| url | http://dx.doi.org/10.1155/2021/8127250 |
| work_keys_str_mv | AT zihaokan investigationofseepagelawinbrokencoalandrockmassunderdifferentloadingandunloadingcycles AT leizhang investigationofseepagelawinbrokencoalandrockmassunderdifferentloadingandunloadingcycles AT mingxueli investigationofseepagelawinbrokencoalandrockmassunderdifferentloadingandunloadingcycles AT xiaochuanyuan investigationofseepagelawinbrokencoalandrockmassunderdifferentloadingandunloadingcycles AT mengqianhuang investigationofseepagelawinbrokencoalandrockmassunderdifferentloadingandunloadingcycles |