Experimental study on progressive failure characteristics of strip coal pillar models under different roof and floor conditions
Source abstract
Abstract
To study mechanical properties and progressive failure characteristics of strip coal pillar, a progressive failure monitoring device was developed. The uniaxial compression test of “roof-strip coal pillar-floor” structure specimens were conducted. As the strength of the roof and floor increases, the strength of structural specimen increases. The damage of the strip coal pillar from middle to the coal-rock interface, and the lateral displacement of the upper part is larger than the lower part. Energy accumulation and release cause discontinuity damage in inhomogeneous coal bodies, the lateral displacement of the strip coal pillar shows step and mutation characteristics. Under hard surrounding rocks, the brittleness and impact characteristics of strip coal pillar are more obvious. The rapid increase of acoustic emission signal can be a failure precursory of strip coal pillar. The research has theoretical value and practical engineering significance to understanding the stability and failure mechanism for strip coal pillar.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Rock Mechanics and Modeling · Geomechanics and Mining Engineering · Landslides and related hazards
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (38)
Show source-provided references
1. Field investigation of long-term bearing capacity of strip coal pillars10.1016/j.ijrmms.2014.02.022 ↗
2. An overview of integrated surface subsidence-reducing technology in mining areas of china10.1007/s11069-015-2123-x ↗
3. Study on mechanical properties and progressive failure mechanism of roof coal pillar structure, Chin. J. Rock
4. Stability and control of room mining coal pillars-taking room mining coal pillars of solid backfill recovery as an example10.1007/s11771-017-3515-8 ↗
5. Generalised analytical models for the strength of the inclined as well as the flat coal pillars using rock mass failure criterion10.1007/s00603-019-01788-7 ↗
6. Mechanism and prevention practice of coal burst in deep gradual residual coal pillar area: a case study10.1007/s12517-022-09527-z ↗
7. An approach to model the strength of coal pillars10.1016/j.ijrmms.2016.09.003 ↗
8. Coal pillar load calculation by pressure arch theory and near field extraction ratio10.1016/j.ijrmms.2010.06.011 ↗
9. Engineering stability and instability mechanism of strip Wongawilli coal pillar system based on catastrophic theory
10. Predicting coal pillar life in South Africa
11. The effect of rock mass gradual deterioration on the mechanism of post-mining subsidence over shallow abandoned coal mines10.1016/j.ijrmms.2016.11.012 ↗
12. An improved method for long-term stability evaluation of strip mining and pillar design10.1016/j.ijrmms.2018.04.045 ↗
13. Coupling influence of inclination angle and moisture content on mechanical properties and microcrack fracture of coal specimens10.2113/2022/6226445 ↗
14. Developing coal pillar stability chart using logistic regression10.1016/j.ijrmms.2012.09.004 ↗
15. Prediction of global stability in room and pillar coal mines10.1007/s11069-013-1014-2 ↗
16. Study on long-term stress and deformation characteristics of strip coal pillar
17. Investigation lateral deformation and failure characteristics of strip coal pillar in deep mining
18. Experimental study on precursory information of deformation and failure of coal rock combination
19. Effect of rock strength on failure mode and mechanical behavior of composite samples10.1007/s12517-014-1574-9 ↗
20. Failure characteristics of combined coal-rock with different interfacial angles10.12989/gae.2016.11.3.345 ↗
21. Failure behavior of a rock-coal-rock combined body with a weak coal interlayer10.1016/j.ijmst.2013.11.005 ↗
22. Influence of interaction between coal and rock on the stability of strip coal pillar
23. Stability of a coal pillar for strip mining based on an elastic-plastic analysis
24. Three-dimensional numerical test analysis of impact tendency of coal rock combination
25. Numerical simulation of impact tendency evolution of combined coal rock structure
26. Study on strength and failure mechanism of combined coal and rock mass with different dip angles
27. Mechanical behavior of rock-coal-rock specimens with different coal thicknesses
28. Experimental study of the strip coal pillar models failure with different roof and floor conditions
29. The strength characteristics and progressive failure mechanism of soft rock-coal combination samples with consideration given to interface effects
30. Coal pillar failure analysis and instability evaluation methods: a short review and prospect10.1016/j.engfailanal.2022.106344 ↗
31. Numerical simulation of coal pillar strength10.1016/j.ijrmms.2008.11.003 ↗
32. A numerical study of stress changes in barrier pillars and a border area in a longwall coal mine10.1016/j.coal.2012.12.008 ↗
33. Influence of backfill on coal pillar strength and floor bearing capacity in weak floor conditions in the Illinois Basin10.1016/j.ijrmms.2014.11.011 ↗
34. Research on mining fracture of overburden in close distance multi-seam10.1016/j.proeps.2011.09.004 ↗
35. Domino instability effect of surrounding rock-coal pillars in a room-and-pillar gob10.1016/j.ijmst.2013.11.006 ↗
36. Low-strength similar materials for backfill mining: insight from experiments on components and influence mechanism10.1520/GTJ20140103 ↗
37. Experimental study on mechanical behavior of roof-coal pillar structure body under different loading rates
38. Experimental study on the progressive failure mechanism and characteristics of strip coal pillar