Characteristics of mining tremors within the near-wave field zone

Dubiński, J.; Mutke, Grzegorz

doi:10.1007/bf00877481

Cited by 13 publications

(7 citation statements)

References 2 publications

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“…It should be noted that in case of the analyzed mining process, the strongest seismic tremors caused no damage on mine workings due to the distant location of its hypocenters (at least 500 m below the level of current mining). These tremors did not caused sufficiently strong vibration in the vicinity of mine workings which could produce rock burst phenomenon (Dubiński & Mutke, 1996). The results of continuous measurement of weighted peak particle velocity parameter PPV W confirmed also that for the strongest tremors the recorded PPV values did not exceed 0.05 m/s.…”

Section: Discussionmentioning

confidence: 56%

“…Thus, when the mine working is in the interaction zone of high dynamic stresses associated with the seismic waves and high static stress, it may cause rock burst in this area. The mechanism of the rock burst in this case is related to explosion (implosion) of a coal seam in the immediate vicinity of the mine openings and the rocks are being thrown dynamically into the excavation or the coal floor is heaved (Dubiński & Mutke, 1996). This rock burst mechanism is currently the most common in Polish underground coal mines.…”

Section: The Current State Of Rock Burst Hazard Assessment Based On Tmentioning

confidence: 99%

“…They contain useful information about the hazard, for example the seismic energy index, EI -which is the ratio of the observed seismic energy to the average energy emitted by seismic events at the same seismic moment (Van Aswagen & Butler, 1993). Important research related to monitoring and assessing of PPV in the near wave field led, among others, McGarr et al (1981) and Dubiński & Mutke (1996). Intensive work was also undertaken in regard to location the hypocenter of mining seismic events (Gibowicz & Kijko, 1993) and to use the passive tomography to study the seismic wave velocity distribution images in order to seismic hazard assessment in mines (Maxwell & Young, 1993;Lurka 2002).…”

Section: Basic Seismic Parametersmentioning

confidence: 99%

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New Criteria to Assess Seismic and Rock Burst Hazard in Coal Mines / Nowe Kryteria Dla Oceny Zagrożenia Sejsmicznego I Tąpaniami W Kopalniach Węgla Kamiennego

Mutke¹,

Dubiński²,

Lurka³

2015

Archives of Mining Sciences

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The paper presents new criteria of seismic and rock burst hazard assessment in Polish hard coal mines where longwall mining system is common practice. The presented criteria are based on the results of continuous recording of seismic events and analysis of selected seismological parameters: spatial location of seismic event in relation to mining workings, seismic energy, seismic energy release per unit coal face advance, b-value of Gutenberg-Richter law, seismic energy index EI, seismic moment M0, weighted value of peak particle velocity PPVW. These parameters are determined in a moving daily time windows or time windows with fixed number of seismic tremors. Time changes of these parameters are then compared with mean value estimated in the analyzed area. This is the basis to indicate the zones of high seismic and rock burst hazard in specific moment in time during mining process. Additionally, the zones of high seismic and rock burst hazard are determined by utilization of passive seismic tomography method. All the calculated seismic parameters in moving time windows are used to quantify seismic and rock burst hazard by four level scales. In practice, assessment of seismic and rock burst hazard is used to make daily decision about using rock burst prevention activities and correction of further exploitation of monitored coal panel.

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Section: Discussionmentioning

confidence: 56%

Section: The Current State Of Rock Burst Hazard Assessment Based On Tmentioning

confidence: 99%

Section: Basic Seismic Parametersmentioning

confidence: 99%

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New Criteria to Assess Seismic and Rock Burst Hazard in Coal Mines / Nowe Kryteria Dla Oceny Zagrożenia Sejsmicznego I Tąpaniami W Kopalniach Węgla Kamiennego

Mutke¹,

Dubiński²,

Lurka³

2015

Archives of Mining Sciences

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“…Propagation velocity of seismic waves in a medium (rock mass) depends on its physical properties, structure of rocks, stress state, and kind and frequency of waves (Dubiński, Mutke, 1996). Practically always, in natural conditions, the medium is a heterogeneous body.…”

Section: Wave Propagation Velocity In Heterogeneous Mediummentioning

confidence: 99%

Selected Methods of Rock Structure Disintegration to Control Mining Hazards / Wybrane Metody Dezintegracji Struktury Skał Dla Zwalczania Zagrożeń Górniczych

Kabiesz¹,

Lurka²,

Drzewiecki³

2015

Archives of Mining Sciences

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SELECTED METHODS OF ROCK STRUCTURE DISINTEGRATION TO CONTROL MINING HAZARDS WYBRANE METODY DEZINTEGRACJI STRUKTURY SKAŁ DLA ZWALCZANIA ZAGROŻEŃ GÓRNICZYCHNatural hazards are inseparable element of underground mining, particularly of coal mining process. They are combated on a regular basis by many measures and effectiveness of these measures determines work safety in mines. Attempts to improve the effectiveness, presented in the paper is based on interference of seismic waves generated by blasting in a selected area of the rock mass and on modification of blasting technology. Preliminary results of detonating classical and new type of explosives in specific temperature and pressure conditions are analyzed. Theoretical and practical consideration of obtaining an interference effect of seismic waves is discussed. A device for making systems of starting notches and a construction of a chamber to test explosives are presented.Keywords: mining hazards, rock structure disintegration, blasting technology Nieodłącznym elementem podziemnego górnictwa, szczególnie węglowego, są zagrożenia naturalne. Ich zwalczanie jest codzienną praktyką, a jego skuteczność decydująco wpływa na bezpieczeństwo pracy. Przedstawione w artykule próby poprawy tej skuteczności obejmują badania efektu nakładania się w wybranym obszarze górotworu drgań generowanych robotami strzałowymi oraz informacje o próbach modyfikacji strzelniczych technik szczelinowania skał, a także wstępne wyniki badania charakterystyk eksplozji klasycznych i nowych materiałów wybuchowych w nietypowych warunkach temperatur i ciśnienia.Omówiono między innymi teoretyczne i praktyczne warunki uzyskiwania efektu interferencji drgań oraz przedstawiono urządzenie do wykonywania systemów tzw. szczelin zarodnikowych i konstrukcję komory będącej elementem stanowiska do badania MW.

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“…The development of the test methodology was guided by the analysis of seismic observations in Polish hard-coal mines (Dubin ski and Mutke, 1996;Mutke, 2007) conducted in the region of the so-called near-field wave. This research showed that 90% of rock bumps occurred in the area where the PPV reached 0.05 to 1.0 m/s.…”

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confidence: 99%

A methodology for laboratory testing of rockbolts used in underground mines under dynamic loading conditions

Pytlik

Prusek

Masny

2016

J. South. Afr. Inst. Min. Metall.

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Underground mining is subject to various natural hazards such as seismic events, rockbursts, fire, and gas (methane). In general, an increase in the extraction depth causes an increase in the likelihood of these hazards, especially seismic activity and rockbursts. Dynamic phenomena such as rockbursts and tremors have been recorded on six continents: Europe (Poland, Russia, Czech Republic, Germany, and Slovenia), Asia (India, and China), North and South America (USA, Canada, and Chile), Africa (South Africa), and Australia. To select appropriate mine working supports for such dynamic phenomena, the performance characteristics of such support types must be determined under both static and dynamic load conditions. This article presents information regarding the application of rockbolts in Polish underground hard-coal mines.

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Characteristics of mining tremors within the near-wave field zone

Cited by 13 publications

References 2 publications

New Criteria to Assess Seismic and Rock Burst Hazard in Coal Mines / Nowe Kryteria Dla Oceny Zagrożenia Sejsmicznego I Tąpaniami W Kopalniach Węgla Kamiennego

New Criteria to Assess Seismic and Rock Burst Hazard in Coal Mines / Nowe Kryteria Dla Oceny Zagrożenia Sejsmicznego I Tąpaniami W Kopalniach Węgla Kamiennego

Selected Methods of Rock Structure Disintegration to Control Mining Hazards / Wybrane Metody Dezintegracji Struktury Skał Dla Zwalczania Zagrożeń Górniczych

A methodology for laboratory testing of rockbolts used in underground mines under dynamic loading conditions

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