“Migrate-Transfer-Control” Support System of Surrounding Rock in the Deep Roadway and Its Application
Source abstract
Abstract
After coal mining enters the deep, the mining environment changes dramatically, and engineering disasters become increasingly prominent, which are mostly related to rock instability and failure. As traditional support is difficult to meet production needs, it is necessary to improve the support system. Based on the engineering background of the Pinggang mining roadway, this work studies the migration law of overlying strata in deep goaf by theoretical analysis and numerical simulation. The results show that the vertical stress and plastic failure range of the surrounding rock in front of the working face increase with the advance distance and when the working face advances to the first square, reaching the maximum. A stope spatial model considering the influence of horizontal stress is established. Combined with the theory of key strata, the stress transfer characteristics of overlying strata are analyzed. It can be seen that 0~30 m in front of the coal wall of the working face is the influence range of advanced abutment pressure, and the dynamic mining pressure in this range has a great influence. The inclined direction of the working face, 0~20 m away from the coal wall of the roadway, is the influence range of the solid coal abutment pressure. On this basis, the “migration- transfer- control” technical system of surrounding rock in deep stope face is put forward, i.e., the stress transfer of surrounding rock is caused by overlying rock migration, and the large deformation of surrounding rock is controlled by supporting means. Based on the original support scheme of the roadway, three reinforcement schemes are designed for the roof, the sidewalls, and both the roof and sides. The deformation control effect of the reinforcement scheme is far greater than that of the single factor, and the field monitoring effect is good. The research results aim to provide theoretical and technical support for the deformation control of mining roadways in the deep mining process.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Geomechanics and Mining Engineering · Grouting, Rheology, and Soil Mechanics · Geotechnical Engineering and Soil Stabilization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory of Mining Engineering of Heilongjiang Province College, Heilongjiang University of Science and Technology, Harbin 150022, China
College of Mining Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
College of Safety Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
College of Civil Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
Funding
Scientific and Technological Key Project of “Revealing the List and Taking Command” in Heilongjiang Province · Natural Science Foundation of Heilongjiang Province
References (31)
Show source-provided references
1. Scientific conception of precision coal mining
2. Research progress of mining response and disaster prevention and control in deep coal mines
3. Strategic thinking of simultaneous exploitation of coal and gas in deep mining
4. Rock Support Design Based on the Concept of Pressure Arch10.1016/j.ijrmms.2006.02.007 ↗
5. Research and consideration on deep coal mining and critical mining depth
6. A Structural Model of Overlying Strata in Longwall workings and its Application
7. Review of the Theory and Practice Control Around Longwall Face in Recent 20 Years of Strata
8. “S-R” Stability for the Voussoir Beam and Its Application
9. Analysis of key block in the structure of voussoir beam in longwall mining
10. Li, Q., Guo, J., Zhang, C., Yang, Y., Ma, J., and Ren, Z. (2022). Research Findings on the Application of the Arch Structure Model in Coal Mining, a Review. Sustainability, 14.10.3390/su142214714 ↗
11. Behaviors of strata movement in coal mining
12. Study on Influences of Primary Key Stratum on Surface Dynamic Subsidence
13. Study on the influence of key strata movement on subsidence
14. Analysis of Breakage and Collapse of Thick Key Strata around Coal Face
15. Overlying strata movement law and its strata pressure mechanism in fully mechanized top-coal caving workface with large space
16. The Impact of Key Strata Movement on Ground Pressure Behaviour in the Datong Coalfield10.1016/j.ijrmms.2019.04.010 ↗
17. The Effects of the Rotational Speed of Voussoir Beam Structures Formed by Key Strata on the Ground Pressure of Stopes10.1016/j.ijrmms.2018.04.041 ↗
18. Roadway Support Theory Based on Broken Rock Zone
19. Mechanism Study on Strength Enhancement for the Rocks Surrounding Roadway Supported by Bolt
20. Fang, Z.L. (1999). Characteristics of Tension and Compression Area and Maintenance Theory of Primary and Secondary Bearing Area, Soft Rock Engineering Committee of Chinese Society of Rock Mechanics and Engineering, Coal Mine Soft Rock Engineering Technology Research and Extension Center.
21. Qin, X.M., and Hao, F.K. (2009). Soft Rock Composite Support Technology of Ronghua Shaft, Soft Rock Engineering and Deep Disaster Control Branch, Chinese Society of Rock Mechanics and Engineering.
22. Xie, Z., Zhang, N., Yuan, Y., Xu, G., and Wei, Q. (2019). Study on Safety Control of Composite Roof in Deep Roadway Based on Energy Balance Theory. Sustainability, 11.10.3390/su11133688 ↗
23. Improved Energy Balance Theory Applied to Roadway Support Design in Deep Mining10.1088/1742-2140/aab3a0 ↗
24. Control theory of uniform strength support in deep roadway
25. Analysis on types and interaction of stress fields in underground coal mines
26. Seventy years development and prospects of strata control technologies for coal mine roadways in China
27. Roadway soft coal control technology by means of grouting bolts with high pressure-shotcreting in synergy in more than 1000 m deep coal mines
28. Stability analysis and control technology of mine roadway roof in deep mining
29. Time-space evolution pattern simulation experiment of surrounding rock deformation and destruction for super kilometer deep shaft roadway
30. Technology of Bolt and Cable and Bolt- Grouting Coupling Support in Deep High Stress and Soft Rock Roadway
31. Instability mechanism of high stress rock mass under excavation and unloading induced by disturbance