Failure characteristics and stability control technology of dynamic pressure roadway affected by the mining activity: A case study
Source abstract
Abstract
Abstract Dynamic pressure roadway affected by the mining activity (DPRAMA), which is aimed at promoting the efficiency of panel replacement, is a new mode of roadway arrangement in neighboring panels. However, the failure characteristics and stability control of DPRAMA surrounding rock are rarely reported. In this study, the fragment grade of two-side coal mass of DPRAMA in Gaojiapu Coal Mine was evaluated using the basic measurement scale-fragment grade evaluation method. Then, the evolution of rock mass failure was analyzed through Flac3D software. The results show that (1) under static loading, DPRAMA is highly stable. (2) Under the second dynamic loading, the stress concentration coefficient and deformation value of surrounding rock both surges. (3) Under dynamic-static loadings, the roof falling value is far larger than the floor heave value, and the deformation of pillar-side coal mass is more serious than that of panel-side coal mass. Surrounding rock deformation is divided into three phases, and the specific support strategy is selected in accordance with the characteristics of each stage. (4) The plastic region shows a tendency of butterfly-shaped failure. Based on these findings, the surrounding rock control strategy of “slow yield and long-short control” was proposed to alleviate roof and pillar-side coal mass deformation. Furthermore, the coupling support scheme of “high-strength yield bolt (cable) & steel band” was designed for DPRAMA.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Rock Mechanics and Modeling · Tunneling and Rock Mechanics · Geotechnical and Geomechanical Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
Show source-provided references
1. Impact analysis of pressure-relief blasting on roadway stability in a deep mining area under high stress10.1016/j.tust.2020.103781 ↗
2. Forecasting the stress concentration coefficient around the mined panel using soft computing methodology10.1007/s00366-018-0608-4 ↗
3. Mechanism and prevention of rockburst in steeply inclined and extremely thick coal seams for fully mechanized top-coal caving mining and under gob filling conditions10.3390/en13061362 ↗
4. Progressive mitigation method of rock bursts under complicated geological conditions10.1016/j.ijrmms.2017.04.011 ↗
5. National, Bureau, of, Statistics, of, China, Hu, Yi, The Statistical Communiqué of the People's Republic of China on the 2007 National Economic and Social Development, China Population Today (01) (2008) 21-23.
6. Analytical solutions for characteristic radii of circular roadway surrounding rock plastic zone and their application10.1016/j.ijmst.2018.10.002 ↗
7. Dynamic tensile behaviour and crack propagation of coal under coupled static-dynamic loading10.1016/j.ijmst.2020.06.007 ↗
8. Study on presplitting blasting the roof strata of adjacent roadway to control roadway deformation
9. Study on S-wave propagation through parallel rock joints under in situ stress
10. Mechanical and energy characteristics of coal-rock composite sample with different height ratios: a numerical study based on particle flow code10.1007/s12665-021-09453-5 ↗
11. Physical experiment and numerical modeling on the failure mechanism of gob-side entry driven in thick coal seam10.3390/en13205425 ↗
12. Numerical study of failure mechanisms and control techniques for a gob-side yield pillar in the Sijiazhuang coal mine, China10.1007/s00603-018-1654-3 ↗
13. A case study on large deformation failure mechanism of deep soft rock roadway in Xin'An coal mine, China10.1016/j.enggeo.2016.12.012 ↗
14. Surrounding rock control of gob-side entry driving with narrow coal pillar and roadway side sealing technology in Yangliu Coal Mine10.1016/j.ijmst.2017.07.023 ↗
15. An approach to measure infill matric suction of irregular infilled rock joints under constant normal stiffness shearing10.1016/j.jrmge.2018.02.006 ↗
16. Deformation and failure characteristics of anchorage structure of surrounding rock in deep roadway10.1016/j.ijmst.2020.06.003 ↗
17. Opportunities and challenges in deep mining: a brief review10.1016/J.ENG.2017.04.024 ↗
18. Rock mechanics and rock engineering in China: developments and current state-of-the-art10.1016/S1365-1609(99)00072-6 ↗
19. Deep mining: a rock engineering challenge10.1007/s00603-019-01799-4 ↗
20. Rock burst criteria and control based on an abutment-stress-transfer model in deep coal roadways10.1002/ese3.715 ↗
21. Roof deformation, failure characteristics, and preventive techniques of gob-side entry driving heading adjacent to the advancing working face10.1007/s00603-015-0713-2 ↗
22. Timoshenko · 1970
23. Stresses in rock about cavities10.1680/geot.1952.3.2.57 ↗
24. A closed-form elastic solution for stresses and displacements around tunnels10.1016/S1365-1609(02)00079-5 ↗
25. An elastic solution for stresses around tunnels with conventional shapes10.1016/S1365-1609(97)00091-9 ↗
26. Solution for perimeter stresses of rocks around a rectangular chamber using the complex function of elastic mechanics
27. Dynamic model validation using blast vibration monitoring in mine backfill10.1016/j.ijrmms.2018.04.047 ↗
28. Numerical investigation of rockburst effect of shock wave on underground roadway10.1155/2015/689373 ↗
29. Geomechanical model test for analysis of surrounding rock behaviours in composite strata10.1016/j.jrmge.2020.12.002 ↗
30. Numerical investigation of coal pillar failure under simultaneous static and dynamic loading10.1016/j.ijrmms.2016.01.017 ↗
31. 3D numerical model for dynamic loading-induced multiple fracture zones around underground cavity faces10.1016/j.compgeo.2013.06.002 ↗
32. Influence of stress path on excavation unloading response10.1016/j.tust.2014.03.002 ↗
33. Energy dissipation rate: An indicator of coal deformation and failure under static and dynamic compressive loads10.1016/j.ijmst.2017.11.006 ↗
34. Numerical simulation on failure effect of mining-induced dynamic loading and its influential factors10.1016/j.ssci.2018.12.011 ↗
35. Risk evaluation of rock burst through theory of static and dynamic stresses superposition10.1007/s11771-015-2570-2 ↗
36. Study on deformation failure mechanism and support technology of deep soft rock roadway
37. Investigation on support pattern of a coal mine roadway under dynamic pressure of mining - a case study10.1504/IJOGCT.2018.093145 ↗
38. A case study on large deformation failure mechanism and control techniques for soft rock roadways in tectonic stress areas10.3390/su11133510 ↗
39. Mine pressure behavior characteristics and control methods of a reused entry that was formed by roof cutting: a case study10.1155/2020/8887026 ↗
40. Numerical simulation of mining-induced damage in adjacent tunnels based on FLAC(3D)
41. Study on the movement characteristics of the overlying stratum and surrounding rock control in ultraclose coal seams: A case study10.1002/ese3.581 ↗
42. Research on evaluation and control technology of coal pillar stability based on the fracture digitization method10.1016/j.measurement.2020.107713 ↗
43. Stability control of narrow coal pillars in gob-side entry driving for the LTCC with unstable overlying strata: a case study10.1007/s12517-018-3994-4 ↗
44. D.-y. Fan, X.-s. Liu, Y.-l. Tan, S.-l. Song, J.-g. Ning, Q. Ma, Numerical simulation research on response characteristics of surrounding rock for deep super-large section chamber under dynamic and static combined loading condition, J. Central South Univ. 27(12) (2020) 3544-3566.10.1007/s11771-020-4509-5 ↗
45. A dynamic ejection coal burst model for coalmine roadway collapse10.1016/j.ijmst.2019.06.012 ↗
46. A unified theory for elastic wave propagation through porous media containing cracks-An extension of Biot's poroelastic wave theory10.1007/s11430-011-4245-7 ↗
47. Influence of fracture-induced weakening on coal mine gateroad stability10.1016/j.ijrmms.2016.04.017 ↗
48. Q.-x. Qi, L.-m. Dou, Rockburst Theory and Technology, Rockburst Theory and Technology 2008.
49. Rockburst risk analysis during high-hard roof breaking in deep mines10.1007/s11053-020-09664-w ↗
50. Anatomy of mining-induced fault slip and a triggered rockburst10.1007/s10064-019-01464-8 ↗
51. Failure mechanism for surrounding rock of deep circular roadway in coal mine based on mining-induced plastic zone10.1155/2018/1835381 ↗
52. The criteria of underground rock structure failure and its implication on rockburst in roadway: a numerical method
53. Mechanical properties and failure behavior of composite samples10.1155/2018/2545127 ↗