Influence of rock mass rating and in situ stress on stability of roof rock in bord and pillar development panels

Sinha, Rabindra Kumar; Jawed, M.; Sengupta, S.

doi:10.1504/ijmme.2015.071175

Cited by 4 publications

(2 citation statements)

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“…e mechanical parameters of the coal and rock all come from mechanics experiments and reference [23], as shown in Table 3. e Mohr-Coulomb constitutive model [24] was adopted in this numerical simulation. In order to reduce the stress concentration caused by constraints, the goaf was filled with the yellow soil to the surface, and the 50 m goaf was ignored in simulation.…”

Section: Numerical Simulationmentioning

confidence: 99%

Experimental Study of Prevention and Control of Rock Burst in Steeply Inclined Coal Seams by Mining Sequence and Filling

Zhang

Liu

Zhu

et al. 2022

Shock and Vibration

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The control and prevention of rock burst in a steeply inclined coal seam are essential. In order to figure out the effects of filling and mining sequence on rock burst in the steeply inclined coal seam, B3+6 and B1+2 coal seams in Wudong coal mine are chosen as the research objects, and an in-house experiment system of similarity simulation is established in this study. Combined with numerical simulation, the characteristics of collapse, stress distribution, and displacement variations can be measured, which provide useful information to study the effects of the filling body and mining sequence on rock burst. Experimental results show that the key reason for rock burst in a steeply inclined coal seam is the stress concentration of the rock pillar between B3+6 and B1+2 coal seams instead of the stress-lever-effect of a deeper rock pillar. The filling body can support the middle rock pillar, share the geological structure stress in the horizontal and vertical direction, eliminate the stress concentration zone largely, and prevent the occurrence of rock burst. When multiple working faces are working, the opposite side of the coal seam should be mined first to release the energy in the rock in advance, thus preventing the rock burst effectively. The research results provide fundamental information for better understanding the reason for rock burst and preventing rock burst in the steeply inclined coal seam.

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Section: Numerical Simulationmentioning

confidence: 99%

Experimental Study of Prevention and Control of Rock Burst in Steeply Inclined Coal Seams by Mining Sequence and Filling

Zhang

Liu

Zhu

et al. 2022

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…Generally, the reasonable width of a coal and rock pillar under dynamic simulation was much larger than that under static simulation [26]. The stress state of coal bodies subjected to the effect of roof strata was investigated, and the shock risk of the roof fracture vibration on coal was studied by numerical simulation [27]. The results showed that the shock risk of the coal body increases during roof shock disturbance.…”

Section: Introductionmentioning

confidence: 99%

Physical Characteristics of Section Coal and Rock Pillars Under Roof Shock Disturbances From Goaf

Shen

2020

Front. Phys.

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The stability of a rock strata structure is closely related to its response physical characteristics under external shock disturbance. The roof shock disturbance from goaf is usually one of the important factors that cause coal and rock pillar instability. It is necessary to study the dynamic physical characteristics of coal and rock pillars under roof shock disturbance from goaf. The dynamic structural system model of elastic-plastic finite element was established for the formation of surrounding rock and coal pillars in a deep stope. The response physical characteristics of coal pillars with different widths were analyzed under the roof shock disturbance intensity and frequency from goaf. The natural vibration characteristics of the stope model were calculated and the first 10-order natural frequencies were extracted. The calculations indicated that the vertical displacement and the plastic zone occupation ratio of the coal pillar increased with the increase of the shock disturbance intensity, decreased with the increase of the shock disturbance frequency, and decreased with the increase of the coal pillar width. The influence of the vertical deformation and the plastic zone occupation ratio of the coal pillar under shock disturbance frequency was more obvious compared with that of the shock disturbance intensity, especially at low frequency. The closer the shock disturbance frequency was to the natural frequency of the model, the larger the plastic zone of the coal pillars was, with the bearing capacity of the coal pillar decreasing significantly. It is significant that more attention should be paid to monitoring the frequency of roof shock disturbance signal when designing coal pillars width in the coal mine.

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Design of rhombus coal pillars and support for Roadway Stability and mechanizing loading of face coal using SDLs in a steeply inclined thin coal seam—a technical feasibility study

Jawed

Sinha

2018

Arab J Geosci

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Influence of rock mass rating and in situ stress on stability of roof rock in bord and pillar development panels

Cited by 4 publications

References 0 publications

Experimental Study of Prevention and Control of Rock Burst in Steeply Inclined Coal Seams by Mining Sequence and Filling

Experimental Study of Prevention and Control of Rock Burst in Steeply Inclined Coal Seams by Mining Sequence and Filling

Physical Characteristics of Section Coal and Rock Pillars Under Roof Shock Disturbances From Goaf

Design of rhombus coal pillars and support for Roadway Stability and mechanizing loading of face coal using SDLs in a steeply inclined thin coal seam—a technical feasibility study

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