Void fill and support techniques to stabilize drift excavated through a transition zone mined by a TBM at the Stillwater mine

Johnson, J. S.; Jacobs, Curt; Ferster, M.; Tadolini, Stephen C.

doi:10.1016/j.ijmst.2016.11.007

Cited by 7 publications

(3 citation statements)

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“…Furthermore, although the use of untreated fly ash from conventional boilers in the handling of voids resulting from the mining of minerals and rocks is recognized in the literature, it is focused mainly on the flow properties of filling mixtures in pipeline transport and site-specific or modelled filling effects [37][38][39][40]. Some works involve more extensive studies of the chemical, hydraulic and mechanical properties of backfilling mixtures prepared with the addition of only a limited amount of conventional fly ash [40][41][42][43][44][45], or the use of unconventional materials or treated waste materials, like temperature-treated coal refuse as a component of blends with conventional fly ash in backfilling mixtures [43], limestone aggregate with conventional fly ash and low pozzolanic cement [46], or waste glass granulated blast furnace slag and fumed silica [47].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Carbon Dioxide and Fluidized Bed Fly Ash in Post-Industrial Land Remediation

et al. 2023

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The utilization of carbon dioxide and combustion products in cost- and energy-efficient technologies is an important element of creating sustainable energy systems, particularly in the transition period towards carbon neutrality and in light of the latest political developments, when solid fuels are still competing for a dominant role in securing energy supplies. Within the study presented, bituminous coal-derived fluidized bed fly ash samples of high calcium content, treated using a dry carbonation method under ambient conditions, were tested in terms of their specific properties to determine their usability in the preparation of injection mixtures for the filling of voids after shallow mining activities and other selected geo-engineering techniques. The study goes beyond the existing literature in terms of the carbonation method used, alkaline earth metal source, scale of the experiment, process conditions employed and product application studied. The results showed that the bituminous coal-derived fluidized bed fly ash, carbonated using the direct method adopted, may be successfully employed as the main solid component (over 82% w/w) of the injection mixtures for filling voids after shallow mining activities. The achievable compressive strength of a few MPa makes these materials applicable also in terms of ground strengthening in case it is required in light of the expected land development options to be employed. All principal materials used in the injection mixtures developed (carbonated fluidized bed fly ash, carbon dioxide, bottom ash) are industrial waste, and the carbonation method employed is simple and performed under ambient conditions, which reduces the required energy and cost input of filling mixture production, avoids the surface waste storage requirements, and contributes to the development of low energy-intensive carbon dioxide utilization and solid waste valorization methods.

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Section: Introductionmentioning

confidence: 99%

Utilization of Carbon Dioxide and Fluidized Bed Fly Ash in Post-Industrial Land Remediation

et al. 2023

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“…Haulage drifts are utilized for transporting the blasted ore from a whole sublevel range (Abdellah et al, 2011), and damage to this type of roadways will seriously affect the routine production and increase the economic loss of a metal mine (Zhang and Mitri. 2008;Abdellah et al, 2011;Raju et al, 2013;Abdellah et al, 2014;Shnorhokian et al, 2016;Johnson et al, 2017;Shnorhokian et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Mining-induced deformation for a haulage drift of the hanging wall at Jinshandian iron mine in China

Yang

Chen²,

Sun³

et al. 2023

Front. Earth Sci.

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In this paper, mining-induced deformation for haulage drifts of the hanging wall at Jinshandian Iron Mine is investigated, based on 8 monitoring stations adopted laser convergence meters. Monitoring results are analyzed to divide deformation-time curves into three types: fluctuation type, partial folding type and whole folding type. Moreover, it is found that tensile deformation is easy to occur in the roadway section corresponding to no folding type and partial folding type. And in the roadway section with folding type curve, it is obviously affected by the steeply anti-inclined structural plane. Furthermore, the relative position relationship between mining activities and a monitoring station is established through local coordinate system. Mining effects on roadway deformation are studied based on rectangular coordinate components and polar coordinate components respectively. The critical value of coordinate components that have a significant impact on roadway deformation have been determined. At last, combined with results of mining impact analysis, deformation mechanisms corresponding to the three deformation curves are revealed. These results help determine the appropriate support time and adopt targeted support schemes.

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“…The pore microstructure of sandstone in deep coal-bearing formations is complex, and the pores in the rock body are intertwined to form an intricate pore structure network, showing high randomness and heterogeneity [20][21][22]. The difficulty of characterizing the pore structure has increased.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Simulations of Pore Structures and Seepage Characteristics of Deep Sandstones

Zhu,

Wu,

Zhang

et al. 2023

Processes

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Previously conducted studies have established that deep underground rock masses have complex pore structures and face complex geological conditions. Therefore, the seepage problem of such rock masses seriously affects engineering safety. To better explore the seepage law of deep rock masses and ensure engineering safety, indoor experimental methods such as casting thin sections, scanning electron microscopy, and mercury intrusion testing were utilized in this study. The microscopic pore shape, size, distribution, and other structural characteristics of sandstone in coal bearing strata were analyzed. The tortuosity calculation formula was obtained by the theoretical derivation method. And a numerical model was established for seepage numerical simulation research through microscopic digital image methods. The seepage law of surrounding rocks in the Tangkou Coal Mine roadway under different conditions is discussed. The research results indicate that the complexity of the pore structure in porous media leads to an uneven distribution of flow velocity and pressure within the medium. Meanwhile, with the change of physical properties, the fluid flow characteristics also undergo significant changes. The research results can effectively guide micropore water blocking, reduce the impact of groundwater on the environment, ensure the environment and safety of the project, and provide guidance for other geological projects.

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Void fill and support techniques to stabilize drift excavated through a transition zone mined by a TBM at the Stillwater mine

Cited by 7 publications

References 0 publications

Utilization of Carbon Dioxide and Fluidized Bed Fly Ash in Post-Industrial Land Remediation

Utilization of Carbon Dioxide and Fluidized Bed Fly Ash in Post-Industrial Land Remediation

Mining-induced deformation for a haulage drift of the hanging wall at Jinshandian iron mine in China

Experimental and Numerical Simulations of Pore Structures and Seepage Characteristics of Deep Sandstones

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