An approach for support design in depillaring panels of coal mines

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

doi:10.1007/s12517-019-4858-2

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…A factorial experiment with k factors, each factor having two levels of value, will require 2 k number of runs. This is known as a 2 k factorial design, and it is read as a two-level k factor design [30][31][32][33].…”

Section: Design Of Experiments and Fractional Factorial Workmentioning

confidence: 99%

Study on the Impact of Different Parameters on Prediction of Crown Deformations in Underground Caverns

Sudhakar,

Sinha,

Naik

2023

Sustainability

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Crown deformation is a major concern in the design and construction of underground caverns. It can lead to damage to the cavern structure and surrounding infrastructure and can also pose a safety hazard to workers. This paper studies the factors affecting crown deformation in underground caverns. A parametric study was conducted to investigate the effects of seven parameters on crown deformation: rock mass rating (RMR), uniaxial compressive strength (UCS), Young’s modulus of intact rock (Ei), Poisson’s ratio (υ), tensile strength (σt), angle of internal friction (φ), and cohesion (C). The results of the parametric study showed that the following parameters significantly affected crown deformation: RMR, UCS, Ei, and Φ. A multiple linear regression analysis was conducted to develop a regression equation to predict crown deformation. The coefficient of determination (R2) for the regression equation is 92.92%, which indicates that the equation is a good predictor of crown deformation. The parametric study results and the regression analysis can be used to improve the design and construction of underground caverns. By considering the factors that affect crown deformation, engineers can design more stable caverns that are less likely to experience deformations. The results of the study can be used to improve the design and construction of caverns, making them safer and more sustainable.

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Section: Design Of Experiments and Fractional Factorial Workmentioning

confidence: 99%

Study on the Impact of Different Parameters on Prediction of Crown Deformations in Underground Caverns

Sudhakar,

Sinha,

Naik

2023

Sustainability

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“…Rock mass rating determined by CMRI-ISM (CMRI Report, [9], V. Venkateswarlu et al [10], Bieniawski [5], Singh et al [11], Paul et al, [12] is modified the Geo -mechanics Classification of Beiniawski, [4] for estimating roof condition and support in Indian coal mine. In this classification number of cases of different mine has been accessed.…”

Section: Cmri Rmr Classificationmentioning

confidence: 99%

Estimation of rock load height during development operation in bord and pillar coal mine using numerical simulation method

Hasim¹,

Jaiswal²,

Shrivastava³

2018

MMC_C

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Bord and pillar mining is the predominant method for extraction of coal from underground in India. Strata control is a major problem affecting safety and productivity of the mine. In conventional method of extraction worked by LHD/SDL has gallery width up to 4.8 m. However, in mechanized mining operation, gallery width goes up to 6.6 m. As per the Director General of Mine Safety (DGMS) guidelines, suggested support pattern is given for gallery width up to 4.8m. In this paper, the study focused to develop generalized equation of roof failure height during development working for wider gallery operation. The input parameters have taken into consideration are rock mass rating (RMR), uniaxial compressive strength (UCS), in-situ stress ratio, depth of working, ratio of gallery width to height. The immediate roof of the model has considered as elasto-plastic in nature. By, considering all these parameters rock load height has been estimated at gallery and junction of the mine during development operation. A generalized equation has been made for gallery as well as junction with the help of regression analysis based on numbers of model results, considering all the input parameters. The required support load density has been estimating with the help of generalized equation. For calibration of the model results, number of case studies has been solved and analyzed.

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Determination of supports’ rational working resistance in steeply inclined caving face

Sun

Zhao

2021

Arab J Geosci

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An approach for support design in depillaring panels of coal mines

Cited by 4 publications

References 9 publications

Study on the Impact of Different Parameters on Prediction of Crown Deformations in Underground Caverns

Study on the Impact of Different Parameters on Prediction of Crown Deformations in Underground Caverns

Estimation of rock load height during development operation in bord and pillar coal mine using numerical simulation method

Determination of supports’ rational working resistance in steeply inclined caving face

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