Comparison of Profiling Results of Attenuation and Velocity of Refracted P-wave in Coal-seam

Szreder, Zbigniew; Pilecki, Z.; Kłosiński, J.

doi:10.3997/2214-4609.20146265

Cited by 5 publications

(5 citation statements)

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“…Seismic profiling was conducted for the use of the damping factor as an additional seismic parameter [8][9][10][11]. Pilecki and Klosinski [8] came to the conclusion that the damping factor is more sensitive to the changes of stress in the rock mass compared to indication based on velocity of the P-wave.…”

Section: Introductionmentioning

confidence: 99%

Reference P-wave velocity in coal seams at great depths in Jastrzebie coal mine

2019

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In the study, the determining of the reference velocity of the P-wave in coal seams used in seismic profiling to assess increases and decreases in relative stresses at large depths has been presented. The seismic profiling method proposed by Dubinski in 1989 covers a range of depth up to 970 m. At present, coal seams exploitation in Polish coal mines is conducted at greater depths, even exceeding 1200 m, which creates the necessity for a new reference velocity model. The study presents an empirical mathematical model of the change of the P-wave velocity in coal seams in the geological conditions of the Jastrzebie coal mine. A power model analogous to the Dubinski’s one was elaborated with new constants. The calculations included the results from 35 measurements of seismic profiling carried out in various coal seams of the Jastrzebie mine at depths from 640 to 1200 m. The results obtained cause changes in the result of calculations of seismic anomalies. Future validation of the proposed model with larger data set will be required.

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Section: Introductionmentioning

confidence: 99%

Reference P-wave velocity in coal seams at great depths in Jastrzebie coal mine

2019

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“…One of the basic ones is stress concentration in coal seams which occurs in particular as a result of the impact of the edges and remnants of adjacent coal seams [7][8][9]. The magnitude of such impacts is commonly recognized by seismic profiling [1,[10][11][12][13][14][15][16][17][18]. Refracted P-wave velocity profiling used to be performed according to the Dubiński method [10] updated in the work of Dubiński and Konopko [1].…”

Section: Introductionmentioning

confidence: 99%

Comparison of the results of the seismic profiling and WAS-96/RMS seismoacoustic active method in an assessment of the impact of the overlying coal seam edge

Olechowski¹,

Krawiec

Kokowski

et al. 2018

E3S Web Conf.

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In the study, a comparison between the results of seismic profiling and the active seismoacoustic method WAS-96/RMS has been presented. The methods were used to assess the impact of an overlying coal seam edge on the relative stress state of the test heading in the chosen hard coal mine in the Upper Silesian Coal Basin, Poland. The work presents the methodologies of measurement, processing and interpretation of both methods. In the research area there were two edges of the adjacent seams at vertical distances of 70 and 100 m. The obtained results allowed for the development of conclusions regarding the effectiveness of both methods. It was stated, that the seismic profiling method, as well as the WAS-96/RMS method allowed for the identification of anomalies in the area of impact of the overlying coal seams. Based on previous experience, a comparison of the advantages and limitations of the seismic profiling and the WAS- 96/RMS method has also been presented. As a result, it was found that seismic profiling should be the basic method for assessing the impact of the edges and remnants of exploited seams, whereas the WAS-96/RMS method may be used as a complementary method if a confirmation of the rockbursts threat is required.

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“…Mining operation in the conditions of rockburst hazard require effective prevention measures, including long-term and short-term control strategies developed in the mining practice [1]. Broadly-understood rockburst control and forecasting of the rockburst threat levels rely mostly on geophysical methods: seismic and seismoacoustic observations, seismic measurements involving seismic profiling in coal seams and seismic tomography [2][3][4][5][6][7][8][9]. In recent years analytical and numerical methods were also developed and effectively used to determine the range and extent of stress concentration zones, de-stressed regions in the proximity of longwall/shortwall faces and near the development entries [10][11].…”

Section: Introductionmentioning

confidence: 99%

Rockburst hazard assessment based on seismic tomography and analytical modelling - a case study

Chlebowski

Burtan

2018

E3S Web Conf.

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In accordance with the formal regulations currently in force in Poland, the criteria for rockburst hazard assessment with respect to coal deposits include the records of seismic events and their impacts, de-stressing of the entire seam or its parts and expert opinions of mine operation engineers. Effectiveness of the de-stressing can be verified by geophysical test data whilst the expert opinions are mostly based on mathematical modelling using specialist software or dedicated simulation algorithms. This study collates and synthesises the results of tests carried out in a seam section in a colliery within the Upper Silesia Coal Basin, obtained by the outlined methods. Geophysical survey results are interpreted basing on seismic tomography procedures utilising the geo-tomography techniques for velocity field reconstruction in data processing. For comparison, the stress state modelling data are provided, based on conventional engineering solutions applicable to mechanics of deformable media. The actual assessment of the rockburst threat level is based on observations of distributions of the longitudinal wave velocity in relation to the actual value of the vertical component of stress concentration within the coal seam.

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Comparison of Profiling Results of Attenuation and Velocity of Refracted P-wave in Coal-seam

Cited by 5 publications

References 0 publications

Reference P-wave velocity in coal seams at great depths in Jastrzebie coal mine

Reference P-wave velocity in coal seams at great depths in Jastrzebie coal mine

Comparison of the results of the seismic profiling and WAS-96/RMS seismoacoustic active method in an assessment of the impact of the overlying coal seam edge

Rockburst hazard assessment based on seismic tomography and analytical modelling - a case study

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