Research on mining-induced failure of grouted rock mass around collapse column based on micro-seismic monitoring
With the gradual depletion of shallow coal resources, the most serious threat restricting the safe mining of Group A coal seams in Huainan Mining Area has changed from gas to floor confined water. According to the production and geological conditions of 12123 working face in Pan’er Mine, a micro-sei...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Safety in Coal Mines
2024-12-01
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| Series: | Meikuang Anquan |
| Subjects: | |
| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20231251 |
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| Summary: | With the gradual depletion of shallow coal resources, the most serious threat restricting the safe mining of Group A coal seams in Huainan Mining Area has changed from gas to floor confined water. According to the production and geological conditions of 12123 working face in Pan’er Mine, a micro-seismic monitoring system was established for the coal floor. Through mining and interpreting micro-seismic data, a micro-seismic identification method for floor failure and conduction induced by mining was proposed. An inversion method of mining fractures evolution was defined based on micro-fractures conductivity. The failure conduction evolution characteristics of grouted rock around collapse column were revealed. The results show that, affected by the advance grouting reinforcement, micro-seismic events show a phenomenon of detour distribution around the grouted collapse column. There was a longitudinal through zone for floor conductivity in the interface and shallow layer, and other areas were sporadically isolated due to the barrier of grouting veins. |
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| ISSN: | 1003-496X |