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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zhao, Shuai Wu, Shiliang Yang, Lulin Wang, Hui |
| Copyright Year | 2016 |
| Abstract | A new form of roof—”secondary roof structure” form, according to the characteristics of significant differences existing between the measured roof pressure and the roof pressure calculated by “support-surrounding rock” formulas, exists in working face that was mined under the upper gob at short range in Shendong mining area. The reasons why additional static load of secondary roof came into being were gained through the analysis of main roof weight distribution coefficient. It is that main roof can not transfer all the static load to the front coal wall and the rear caved gangue, and partial weight of the gangue of upper gob served as the additional static load attaching to the roof of working face. The roof parameters of five working faces mining under the upper gob were counted based on the field measurement and theoretical analysis. What is more, here, the relationship between the M/L value and the roof form was analyzed. Also the roof pressure of 21305 working face of 1−2 coal seam was calculated based on the secondary roof structure model, and the additional static load coefficient (T) was used as measurement of the additional static load of secondary roof. Finally, the directions which can be made a breakthrough in theoretical research of secondary roof were introduced. |
| Starting Page | 195 |
| Ending Page | 202 |
| Page Count | 8 |
| File Format | |
| ISSN | 09603182 |
| Journal | Geotechnical and Geological Engineering |
| Volume Number | 35 |
| Issue Number | 1 |
| e-ISSN | 15731529 |
| Language | English |
| Publisher | Springer International Publishing |
| Publisher Date | 2016-10-01 |
| Publisher Place | Cham |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Roof structure roof Roof pressure Additional static load coefficient Geotechnical Engineering & Applied Earth Sciences Hydrogeology Terrestrial Pollution Waste Management/Waste Technology Civil Engineering |
| Content Type | Text |
| Resource Type | Article |
| Subject | Soil Science Geology Architecture Geotechnical Engineering and Engineering Geology |
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