Experience in Introduction of Technology of Filling of the Domes with Saponific Resins at the Mines of TOO Vostoktsvetmet

Krupnik, L. A.; Shaposhnik, Yu. N.; Shaposhnik, S. N.

doi:10.24000/0409-2961-2017-7-38-42

Cited by 5 publications

(1 citation statement)

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“…Hence, mine workings construction within the ores and rocks should involve dynamic manifestations of rock pressure. Rock rigidity decreases sharply within the areas of weathering, tectonic faults, and areas of hydrothermal variation of rocks which thickness varies from several meters up to 100 -150 m (Krupnik, Shaposhnik, & Shaposhnik, 2017). Wallrocks are rather unstable due to numerous multidirectional microfissures filled with calcite, pyrite, and multiply slipping planes.…”

Section: Geotechnological Conditions Of Orlovskoe Deposit Miningmentioning

confidence: 99%

Selecting a variant to allocate a plant producing shotcrete while implementing method of “wet” pneumatic concrete placing in Orlovskaia mine

Krupnik¹,

Shaposhnik²,

Shaposhnik³

et al. 2019

Min. miner. depos.

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Purpose. Mining and geological conditions are complicated due to the decreased level of mining within deposits of West Kazakhstan. It results in significant increase in the amount of metal framed support which cannot always provide safety of mine workings. The problem may be solved by transition from heavy and labour-intensive in mounting metal special shape framed supports to the cheaper and more easily erected reinforced shotcrete with reinforced frames. "Dry" method of shotcrete application, used currently in Orlovskaia mine, can provide neither high quality nor the required amounts of pneumatic concrete placing; in this context, "wet" method makes it possible to support rock mass at a high mechanization level, and development of premium durable pavement. Thus, in the context of Orlovskaia mine it is required to solve the problems concerning selection of efficient schemes to deliver shotcrete mixtures or their components and to determine optimum location for a plant, producing shotcrete from the viewpoint of minimization of expenditures connected with shotcrete support.Methods. Calculations, determining the required shotcrete amounts to support mine workings, technological capacity of a plant to produce shotcrete as well as self-propelled mixers, have been performed. Basic production facilities for shotcrete operations have been selected. Three variants to allocate a plant for shotcrete manufacturing within Orlovskaia mine have been considered. The discounted net cash flows have been compared ignoring sales of the finished product of Orlovskaia mine in terms of the available and the proposed methods to support mine workings for the period of 2016 -2025.Findings. Relying upon laboratory tests, carried out in Kazzink LLP as well as BASF and Normet Companies, efficient compositions of shotcrete mixtures, providing preparation of shotcrete mixture of the required quality in terms of minimal binder consumption have been identified. It has been recommended to use 3.5 m 3 mining machine UnimecMF500 Transmixer by Normet Company as a mixture to deliver shotcrete; self-propelled equipment Mey-coME-3 (theoretical output is up to 20 m 3 /h) by AtlasCоpcо Company has been proposed to apply "wet" shotcrete. Use of underground 15 m 3 /h mobile plant on stands or on trailer of Normet Company has been substantiated to be mounted in a small-cross chamber with cement bulk storage or in big bags. Schemes to allocate concrete mixing plant have been developed for specific conditions of Orlovskaia mine.Originality. Specific features of potential variants to allocate a plant, producing shotcrete to support mine workings in terms of Orlovskaia mine, have been identified from technological and economic viewpoints.Practical implications. Economic expediency of a process line intended to support mine workings in Orlovskaia mine using a "wet" shotcrete has been developed and substantiated.

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Section: Geotechnological Conditions Of Orlovskoe Deposit Miningmentioning

confidence: 99%

Selecting a variant to allocate a plant producing shotcrete while implementing method of “wet” pneumatic concrete placing in Orlovskaia mine

Krupnik¹,

Shaposhnik²,

Shaposhnik³

et al. 2019

Min. miner. depos.

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Stress State of Support System in Temporary Roadway in Unstable Rock Mass

Seryakov

Krasnovsky²

2022

J Min Sci

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Effect of Original Stress State of the Rock Mass on Distribution of Displacements and Stresses in the Vicinity of Supported Mine Working in Unstable Rocks

Krasnovsky

Seryakov

2020

Interexpo GEO-Siberia

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The statement of the problem of finding the stress-strain state of support and rocks surrounding the mine working in case of cushioning with phenol resins is used to determine the peculiarities of its formation under the influence of gravitational and hydrostatic original stress fields. It is found that maximum vertical compressive stresses arise in vertical support units at gravitational field, which exceed by half their values for a hydrostatic field. However, as the height in the mine roof filled with phenol resins increases, maximum vertical stresses for both options become comparable. In arch support units at hydrostatic original state of the rock mass, the values of horizontal tensile stresses are by half less than at gravitational original field.

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Experience in Introduction of Technology of Filling of the Domes with Saponific Resins at the Mines of TOO Vostoktsvetmet

Cited by 5 publications

References 0 publications

Selecting a variant to allocate a plant producing shotcrete while implementing method of “wet” pneumatic concrete placing in Orlovskaia mine

Selecting a variant to allocate a plant producing shotcrete while implementing method of “wet” pneumatic concrete placing in Orlovskaia mine

Stress State of Support System in Temporary Roadway in Unstable Rock Mass

Effect of Original Stress State of the Rock Mass on Distribution of Displacements and Stresses in the Vicinity of Supported Mine Working in Unstable Rocks

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