Study on Roof-Cutting and Support of a Retreating Roadway under the Double Influence of Large Mining Heights
Source abstract
Abstract
When the coal mining face enters the final stage of mining, the roadway faces the superimposed influence of surrounding rock stress redistribution and roof rotary moment. As affected by the strong disturbance in the coal mining process, the roof plate of the roadway has undergone serious deformation, which seriously affects the stability of the roadway. Taking the 108 working face of the Jinjitan coal mine as the engineering background, a comprehensive study was conducted on the control of the perimeter rock in the retracement of a tunnel in a heavy coal seam with a large mining height. By analyzing the physical properties of the enclosing rock of the retreated roadway, and using theoretical analysis, numerical simulation, on-site monitoring, and other methods, the characteristics of the peripheral rock’s movement relationship and mineral pressure manifestation in the final mining stage of the large-height working face have been studied. The structural mechanics model was established, and in the case where the support cannot be solved just by strengthening the support, the design scheme of “blasting roof break + constant resistance anchor cable support” was innovatively tried. FLAC3D simulation results show that the stress release of the surrounding rock is more adequate when the height of roof cutting is 20 m. The stress of the surrounding rock near the roadway is reduced by 30~40%, and the stress state is reasonable. The constant resistance and large deformation anchors can absorb the deformation energy of the rock body, maintain constant working resistance and stable deformation, and have good rock stability control, which is conducive to the stability of the roadway.
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Research context
OpenAlex topics: Geomechanics and Mining Engineering · Geoscience and Mining Technology · Grouting, Rheology, and Soil Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Civil Engineering and Architecture, Dalian University, Dalian 116622, China
Research Center for Geotechnical and Structural Engineering Technology of Liaoning Province, Dalian University, Dalian 116622, China
Faculty of Science and Technology, Beijing Normal University-Hong Kong Baptist University United International College, Zhuhai 519087, China
Funding
National Natural Science Foundation of China
References (47)
Show source-provided references
1. Principles of the roof cut short-arm beam mining method (110 method) and its mining-induced stress distribution10.1016/j.ijmst.2017.09.002 ↗
2. Numerical Simulation Research on Coupling Support Theory of Roadway Within Soft Rock at Depth
3. Research on cooperative control method of comprehensive pressure relief and anchor grouting reinforcement in deep mining roadways10.1007/s40948-024-00765-x ↗
4. Han, C., Zhang, N., Yang, H., Zhao, Q., and Song, K. (2023). Discontinuous Deformation Characteristics of Deep Buried Roadway Roofs and Linkage Control of Thick Layer Cross-Boundary Anchorage: A Case Study. Energies, 16.10.3390/en16052160 ↗
5. Application of stability analysis in surrounding rock control and support model of deep roadway10.1504/IJOGCT.2022.120313 ↗
6. Multifactorial analysis of a gateroad stability at goaf interface during longwall coal mining—A case study10.33271/mining17.02.009 ↗
7. Design and Practical of Equipment remove Gateway of Fully Mechanized Coal Mining Working Face with Super Mining Height 8. 2 m
8. The new Austrian tunnelling method
9. Basic theory and technology study of stability control for surrounding rock in deep roadway
10. Liu, X., Hua, X., Liang, Y., and Li, C. (2024). Quantitative Research on Roof Deformation and Temporary Support Stiffness in Deep-Mine Gob-Side Entry Retaining by Roof Cutting. Appl. Sci, 14.10.3390/app14156520 ↗
11. Yue, X., Tu, M., Li, Y., Chang, G., and Li, C. (2022). Stability and cementation of the surrounding rock in roof-cutting and pressure-relief entry under mining influence. Energies, 13.10.3390/en15030951 ↗
12. Study on the method of pressure relief by roof cutting and absorbing energy in deep coal mines10.1007/s10064-023-03313-1 ↗
13. Key parameters of roof cutting along the dip in withdrawing face
14. Surrounding rock deformation control for roof cutting and pressure relief under thick and hard roof
15. Self-forming roadway of roof cutting and surrounding rock control technology under thick and hard basic roof
16. Physical simulation experiment on the movement of rock strata upon automatic roadway forming by roof cutting and pressure releasing
17. Longwall mining method with roof-cutting unloading and numerical investigation of ground pressure and roof stability10.1007/s12517-018-3962-z ↗
18. Automatic roadway formation method by roof cutting with high strength bolt-grouting in deep coal mine and its validation
19. Research on control methods of automatically-formed roadway without coal pillar for extremely close-distance coal seams
20. A study of the mechanical structure of the direct roof during the whole process of non-pillar gob-side entry retaining by roof cutting10.1177/0144598720947470 ↗
21. Failure mechanisms and control strategies in dynamic pressure roadways of deep soft rock based on compensation theory
22. Effect of cutting roof height on the stability of gob-side retaining roadway with roadside support
23. Key parameters of the gob-side entry retaining formed by roocutting and pressure release in deep medium thickness coal seams
24. Characteristics of overburden failure and fracture developmentin gob of mining with gob side entry formed by cutting roof
25. Parameter design and engineering application of directional blasting for roof cutting pressure relief of waterproof coal pilla
26. Bednarek, Ł., Małkowski, P., Niedbalski, Z., and Mucha, K. (2024). Steel Arch and Rock Bolt Support in Terms of the Gateroad Stability Maintaining behind the Longwall Face. Appl. Sci, 14.10.3390/app14093594 ↗
27. Determination of key parameters of gob-side entry retaining by cutting roof and its application to a deep mine
28. Research on Roof Cutting and Pressure Releasing Technology of Directional Fracture Blasting in Dynamic Pressure Roadway10.1007/s10706-018-0707-4 ↗
29. Solutions to prevent face spall and roof falling in fully mechanized longwall at underground mines10.33271/mining16.01.127 ↗
30. Study on floor heave control technology of deep tectonic stress water-rich soft rock roadway based on blasting pressure relief
31. Study on support of retractable channel in fully-mechanized miningface with super large mining height
32. Xie, S., Wu, Y., Guo, F., Zou, H., Chen, D., Zhang, X., Ma, X., Liu, R., and Wu, C. (2022). Application of pre-Splitting and roof-cutting control technology in coal mining: A review of technology. Energies, 15.10.3390/en15176489 ↗
33. An exploration of improving the stability of mining roadways constructed in soft rock by roof cutting and stress transfer: A case study10.1016/j.engfailanal.2023.107898 ↗
34. Study on surrounding rock control of roadways in deep coal mines based on roof cutting and pressure release technology by directional tensile blasting
35. Yang, Y. (2020). Research on the Support Technology of CompositeRoof Retraction Passage with Ooze Invasionin Multi-hole Karst Area. [Master’s Thesis, Taiyuan University of Technology].
36. Roof deformation mechanism and control measures of pillarless mining with gob-side entry retaining by roof cutting and pressure relief
37. Theory of longwall mining by using roof cuting shortwall team and 110 method—The third mining science and technology reform
38. Study on key parameters of roof cutting and pressure release in medium-thickness coal seam10.1007/s10706-019-00912-2 ↗
39. Research and application of bidirectional shaped tensile forming blasting technology
40. Numerical study of fracture plane control in laboratory-scale blasting10.1016/j.engfracmech.2008.02.007 ↗
41. Innovative approach based on roof cutting by energy-gathering blasting for protecting roadways in coal mines10.1016/j.tust.2020.103387 ↗
42. Overburden stress arch elevation effect induced by roof cutting and destress technique in coal mine longwall panel and its control mechanism to entry surrounding rock
43. Mechanical characteristics of constant resistance and large deformation anchor cable and its application in deep gob-side entry retaining by roof cutting
44. Mechanical Behaviour of a Deep Soft Rock Large Deformation Roadway Supported by NPR Bolts: A Case Study10.1007/s00603-023-03525-7 ↗
45. Research on an automatic roadway formation method in deep mining areas by roof cutting with high-strength bolt-grouting10.1016/j.ijrmms.2020.104264 ↗
46. Study on support technology of equipment removal channel in fully-mechanized top coal caving face in ultra—Thick seam
47. Deformation and failure characteristics of anchorage structure of surrounding rock in deep roadway10.1016/j.ijmst.2020.06.003 ↗