Geomechanical design of a room and rib pillar granite mine

Peila, Daniele; Guardini, Claudia; Pelizza, Sebastiano

doi:10.1016/s1005-8850(08)60020-1

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…According to the tributary area theory, the pillar load (S p ) or the average pillar stress [3][4] can be calculated by Eq. (4) based on vertical stress , H  pillar width p, and room width c:…”

Section: Safety Factor For Stability Assessmentmentioning

confidence: 99%

Comparative stability analyses of traditional and selective room-and-pillar mining techniques for sub-horizontal tungsten veins

Torres

Gama

Silva

et al. 2011

Int J Miner Metall Mater

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The stability and productivity concerning a modification on the traditional room and pillar for a new selective technique at the Portuguese Panasqueira Mine have been described. The traditional room-and-pillar stoping uses 5.0-m wide rooms with 3.0 m3.0 m pillars, while the selective room-and-pillar mining technique consists in stoping with rooms of 4.0 m wide and pillars of 4 m4 m with a subsequent selective cutting of the quartz veins at the mid pillar of approximately 0.5 m high, to obtain a pillar section with an area of 3.0 m3.0 m. The stability and productivity analyses indicate that the selective technique obtains smaller average pillar safety factor, more rock mass displacement, more extraction and selectivity ratios, and ore grade improvement, compared with the traditional technique. These results show that the selective technique is also more convenient. This proposed selective room-and-pillar mining technique is applicable to any sub-horizontal narrow quartz veins with wolfram, gold, etc. such as the famous La Rinconada gold mine in the Peruvian Andes.

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Section: Safety Factor For Stability Assessmentmentioning

confidence: 99%

Comparative stability analyses of traditional and selective room-and-pillar mining techniques for sub-horizontal tungsten veins

Torres

Gama

Silva

et al. 2011

Int J Miner Metall Mater

View full text Add to dashboard Cite

show abstract

“…Such kind of issues exists in different European countries, such as in French Jura (Smeray et al 2000), in Spain (Fuentes et al 2010), and in Emilia-Romagna Region (Italy) (Tinti et al 2015). The problem of pillar design have been studied in literatures the studies focused on the design of the pillar in coal mines (Wagner 1980), and room and rib pillar in Granite mine (Peila et al 2008). Several known cellars and cavities exist in Budapest, Hungary (Hajnal 2006;Görög et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Historic subsurface dimension stone quarry and the stability of its galleries as a function of pillar width and thickness of cover bed

2022

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There are historic subsurface dimension stones in the capital of Hungary (Budapest) that were excavated in porous limestone. The stability of these subsurface openings is important, since most of them are located in urban areas, where existing buildings or new structures are planned to be built. The paper presents a detailed study considering the geometry of the system and the mechanical parameters of the limestone. The geometry of the cellar system was obtained using terrestrial laser scanning (TLS). The cover beds are few meters in thickness, and the width of the pillar is between 2.50 and 3.98 m, according to the measurements. The rock mass parameters which were used in the calculations were obtained from laboratory tests. A finite element (FEM) software Rocscience (RS2) were applied to model the stability of the galleries. Calculations were made for various geometries taking into account the thickness of cover beds and the width of pillars. Altogether 70 models were made. A surface load of 150 kN/m2 was also applied to model the buildings. New relationships between cover bed thickness, pillar width and displacements are outlined to compare these results to previous works. The strength reduction factor was also calculated for all geometries, indicating the changes in the stability of these underground quarries and pointing out the importance of cellar geometries.

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Undersea safety mining of the large gold deposit in Xinli District of Sanshandao Gold Mine

Liu

Dang

2012

Int J Miner Metall Mater

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Geomechanical design of a room and rib pillar granite mine

Cited by 3 publications

References 2 publications

Comparative stability analyses of traditional and selective room-and-pillar mining techniques for sub-horizontal tungsten veins

Comparative stability analyses of traditional and selective room-and-pillar mining techniques for sub-horizontal tungsten veins

Historic subsurface dimension stone quarry and the stability of its galleries as a function of pillar width and thickness of cover bed

Undersea safety mining of the large gold deposit in Xinli District of Sanshandao Gold Mine

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