State analysis of overworked and underworked parting between contiguous seams and during their simultaneous top-down mining

Barabash, Mykhailo; Energy”, Lls “Dtek

doi:10.15407/mining10.02.034

Cited by 4 publications

(4 citation statements)

References 9 publications

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“…Therefore, for the operational assessment of parting stability, a numerical analyses of curves has been performed ( Fig. 3 and 4) in conjunction with criterion (1). This results in the determination of interface areas of the stable and unstable state of the parting rocks, which are shown in Fig.…”

Section: Forecasting the Effect Of Troublesome Zones On Parting Weakementioning

confidence: 99%

“…1. It was established that under the joint mining of coal seams (not classified as contiguous grade) abnormal areas of rock pressure are manifested [1,2] at the coal-face operation in a wide range of parting thicknesses up to 20 -50 m.…”

Section: Introductionmentioning

confidence: 99%

“…As a result of the stress-strain state calculations of the parting rocks, it has been established that the vertical stress concentrations penetrate the overlying seam bottom to the middle of the parting thickness and deeper, and constitute a danger of weakening the soft wet argillite and siltstone at a depth of 200 -300 m, a discontinuity occurs at a depth of 400 m in their naturally wet state. Below that depth, the vertical stress concentrations extend to the underlying seam and create rock pressure, which increases by 20 -50% on the support construction of existing works [1]. This makes it possible to develop in advance the measures for the strengthening of development works to support construction in dangerous areas [4].…”

Section: Introductionmentioning

confidence: 99%

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Assessment of parting rock weak zones under the joint and downward mining of coal seams

et al. 2018

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The aim of the forecasting effort is to identify troublesome zones of stability loss by a parting lengthwise of the extraction panel under the joint and downward mining of coal seams. Analyses have been carried out of active stress component curves for a 3-D model computational experiment compared with the strength characteristic of each lithotype of a parting. An algorithm has been developed for the stability assessment of a parting lengthwise along the extraction panel. The relationship patterns have been estimated between the sizes of the parting rocks discontinuity zones and the main geomechanical parameters. A scientifically grounded basis has been created for the detection of the parting rock weak zones lengthwise along the extraction panel for the calculation of the mounting and security systems of the development works. A complex of underground instrumental observations was made, which was used to set up a correspondence of patterns to indicate the variation in rock pressure manifestation intensity and the tendencies for changes in the parting structure. All of this confirms the adequacy of the techniques for parting state forecasting, which is recommended for use in the engineering documentation for the joint and downward mining of coal seams.

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Section: Forecasting the Effect Of Troublesome Zones On Parting Weakementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Assessment of parting rock weak zones under the joint and downward mining of coal seams

et al. 2018

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“…Moreover, because of the increased distance between the strata they cannot be referred to the category of contiguous seams. In this regard, authors of the work (Barabash, 2016), departing from experimental research into the stress of rocks in initially overworked and subsequently underworked massif of parting during С 9 and С 8…”

Section: Introductionmentioning

confidence: 99%

Research of rock pressure manifestations in rocks of parting during descending and simultaneous mining of C9 and C10Top coal seams

Kovalevska¹,

Symanovych²,

Barabash³

et al. 2017

Min. miner. depos.

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Purpose. To estimate the probability of interstratal rocks stability loss during simultaneous mining of two seams in series in the descending order.Methods. Methods of a computing experiment and mine observations were used for conducting the research. Findings.Recommendations for the improvement of 914 bolting system parameters of complex roadway for possibility of its reusing are developed.Originality. Regularity of stress-strain state change of parting during simultaneous mining of coal seams with the purpose to reveal the constituent of rock pressure manifestations during the top seam mining is studied. Practical implications.The received results can be generalized for the purpose of providing recommendations concerning bolting and supporting of mine workings during simultaneous mining of seams in series.

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Modeling of the disjunctive geological fault influence on the exploitation wells stability during underground coal gasification

Dychkovskyi

Lozynskyi

Saik

et al. 2018

Archives of Civil and Mechanical Engineering

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State analysis of overworked and underworked parting between contiguous seams and during their simultaneous top-down mining

Cited by 4 publications

References 9 publications

Assessment of parting rock weak zones under the joint and downward mining of coal seams

Assessment of parting rock weak zones under the joint and downward mining of coal seams

Research of rock pressure manifestations in rocks of parting during descending and simultaneous mining of C9 and C10Top coal seams

Modeling of the disjunctive geological fault influence on the exploitation wells stability during underground coal gasification

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