Monitoring of the stability of underground workings in Polish copper mines conditions

Fuławka, Krzysztof; Mertuszka, Piotr; Pytel, Witold

doi:10.1051/e3sconf/20182900008

Cited by 13 publications

(10 citation statements)

References 3 publications

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“…From Table 2 it can be seen that application of a stable shape of cross section and of the new support of mine working allows reducing the cost of its support setting. Thus, the laying of preparatory mine working with a stable shape allows to save by 1 long meter: at a depth up to 350 m -1401 UAH, up to 700 m -880 UAH, up to 1000 m -641 UAH, up to 1600 m -1160 UAH and up to 3000 m -2029 UAH [39]. There is a stable exponential dependence with an extremum point at a depth of 1000 m, at which a sharp increase in saved costs begins on a support setting in the preparatory mine workings [40].…”

Section: Resultsmentioning

confidence: 99%

Self-regulating roof-bolting with the rock pressure energy use

et al. 2018

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The perspective of discovery of zonal disintegration phenomenon of rocks around underground mine workings is analyzed. The methodological stages for research of this phenomenon are shown. The physics of zonal disintegration of rocks around underground mine workings is disclosed. There are described the possibilities of advanced entropy method and developed energy method that allow to investigate a phenomenon of zonal capsulation of underground mine workings. The sequence of research of this phenomenon parameters is presented. The order of choice of stable shape and resource-saving support in underground mine workings is substantiated, for the deep horizons of the Kryvorizkyi Iron-Ore Basin mines. The method of parameters calculation of self-regulating roof-bolting in underground mine workings is substantiated, which allows to use the rock pressure energy. The design of a self-regulating roof-bolting is developed, which allows applying metal, polymer and rope bolts. The economic efficiency of rock pressure energy usage is substantiated in case of support setting at great depths in underground mine workings.

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Section: Resultsmentioning

confidence: 99%

Self-regulating roof-bolting with the rock pressure energy use

et al. 2018

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“…The main factors of negative impact of the eliminated mines and pits on the environment and technical solutions to prevent it are shown in table 1 [9].…”

Section: Resultsmentioning

confidence: 99%

Environmental Consequences of Coal Mine Elimination

Tyuleneva¹

2018

Proceedings of the 9th China-Russia Symposium “Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protecti

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Mines have an impact on all components of the environment during and after coal mining. Process of restructuring coal industry and elimination of unprofitable mines changes anthropogenic impact on the environment. Structural and technological change in the geological massif is terminated, but other types of negative impact on the environment continue become more active. Elimination of coal mines is accompanied by the emergence of new phenomena and processes that were not in the period of operation of enterprises and that have a negative environmental impact. The degree of impact of the mine on the environment depends on many factorsgeological conditions, hydrogeological factors, development and quality of land allocated for mine workings. As a result of the combined effect of negative factors during mine elimination, sustainable increase in the area of territories with active development of flooding communal and industrial facilities, agricultural lands, communication facilities, transport highways are appeared. As a consequence processes of pollution of surface water and groundwater are activated, that combined with ground surface depression, accumulation of potential energy in flooded mine workings with the formation of hydro-geo-mechanical stresses and decrease of resistance of rock masses. Geochemical pollution of industrialurban and agricultural landscapes is observed almost everywhere. The paper lists types of environmental pollution that occurred after elimination of coal mines. Possible ways of solving environmental problems of mine elimination are considered.

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“…The measurements were developed using an instrumented rock bolt [14,19]. This type of device allows to measure stresses on five measurement levels in four perpendicular directions.…”

Section: Methodsmentioning

confidence: 99%

“…Based on many years of experience, it should be stated that the methods applied do not fully meet the expectations regarding early warnings of instability occurrences [14], which therefore results in a relatively high number of roof falls. Example of stability loss within the direct roof is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Effect of Near-Wave Field Mining Tremors on the Rock Bolt Support Behaviour within Stress Domain

2019

Self Cite

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One of the most serious hazard in the underground copper mining in Poland is the roof fall hazard. The scale and intensity of this type of events depends on several factors. Due to seismic activity, weaker roof strata can loosen and deform, generating additional load on the rock bolt support. The type of load depends strictly on the course of stratum deformation as well as on the intensity of the dynamic effect in the form of a seismic wave. Continuous monitoring is then necessary to determine the risk level of stability loss within existing excavations in order to minimize the probability of serious accidents. The following study analyses the impact of tremors recorded within the near-wave field upon the stress change in the instrumented rock bolts.

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Monitoring of the stability of underground workings in Polish copper mines conditions

Cited by 13 publications

References 3 publications

Self-regulating roof-bolting with the rock pressure energy use

Self-regulating roof-bolting with the rock pressure energy use

Environmental Consequences of Coal Mine Elimination

Effect of Near-Wave Field Mining Tremors on the Rock Bolt Support Behaviour within Stress Domain

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