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| 1 | Use of machine learning algorithms to assess the state of rockburst hazard in underground coal mine openings显示文摘The risk of rockbursts is one of the main threats in hard coal mines. Compared to other underground mines, the number of factors contributing to the rockburst at underground coal mines is much greater.Factors such as the coal seam tendency to rockbursts, the thickness of the coal seam, and the stress level in the seam have to be considered, but also the entire coal seam-surrounding rock system has to be evaluated when trying to predict the rockbursts. However, in hard coal mines, there are stroke or stress-stroke rockbursts in which the fracture of a thick layer of sandstone plays an essential role in predicting rockbursts. The occurrence of rockbursts in coal mines is complex, and their prediction is even more difficult than in other mines. In recent years, the interest in machine learning algorithms for solving complex nonlinear problems has increased, which also applies to geosciences. This study attempts to use machine learning algorithms, i.e. neural network, decision tree, random forest, gradient boosting, and extreme gradient boosting(XGB), to assess the rockburst hazard of an active hard coal mine in the Upper Silesian Coal Basin. The rock mass bursting tendency index WTGthat describes the tendency of the seam-surrounding rock system to rockbursts and the anomaly of the vertical stress component were applied for this purpose. Especially, the decision tree and neural network models were proved to be effective in correctly distinguishing rockbursts from tremors, after which the excavation was not damaged. On average, these models correctly classified about 80% of the rockbursts in the testing datasets. | Lukasz Wojtecki Sebastian Iwaszenko Derek B.Apel Mirosawa Bukowska Janusz Makówka | 2022 | Journal of Rock Mechanics and Geotechnical Engineering2022，14，3： | 4 |
| 2 | Selected elements of rock burst state assessment in case studies from the Silesian hard coal mines显示文摘Exploitation of coal seams in the Upper Silesian Coal Basin is conducted in complex and difficult conditions. These difficulties are connected with the occurrence of many natural mining hazards and limitations resulting from the existing in this area surface infrastructure. One of the most important problems of Polish mining is the rock burst hazard and reliable evaluation of its condition. During long-years’ mining practice in Poland a comprehensive system of evaluation and control of this hazard was developed. In the paper the main aspects of rock burst hazard state evaluation will be presented, comprising: 1) rock mass inclination for rock bursts, i.e., rock strength properties investigation, comprehensive parametric evaluation of rock mass inclination for rock bursts, prognosis of seismic events induced by mining operations, methods of computer-aided modelling of stress and rock mass deformation parameters distribution, strategic rock mass classification under rock burst degrees; 2) immediate seismic and rock burst hazard state evaluation, i.e., low diameter test drilling method, seismologic and seismoacoustic method, comprehensive method of rock burst hazard state evaluation, non-standard methods of evaluation; 3) legal aspects of rock burst hazard state evaluation. Selected elements of the hazard state evaluation system are illustrated with specific practical examples of their application. | KABIESZ Józef MAKóWKA Janusz | 2009 | Mining Science and Technology2009，19，5： | 4 |
| 3 | Empirical-analytical method for evaluating the pressure distribution in the hard coal seams显示文摘At present, numerical modelling of distributions of many rock mass characteristics plays more and more important role in many geomechanical questions. In the issues related to seismic and rockburst hazards, the analyses of distributions of stress component values in the rock strata are performed, similarly as those of deformation parameters of the strata. To do this, commercial computer programs are used which function on the basis of the finite element-, separate element-, finite difference-, boundary element methods, or individually designed computer programs. They enable to obtain information, unattainable with other methods, being of importance for further concluding on those hazards. The programs based on applying those methods have contributed to important progress and development of science in the domain of analyzing and predicting the hazards. To this end, the commercial computer programs are used that are based on the methods of: finite elements, separate elements, finite differences, boundary elements, etc., or on individually developed computer programs. They enable to obtain information, unavailable using other methods, being of vital importance for further concluding on these hazards. The programs based on these methods have contributed to essential progress and development of science in the field of analysing and predicting the hazards. Apart from their obvious advantages, they have many drawbacks that hinder their practical, routine application. To allow making these type of analyses, without the necessity of constructing complicated models and knowing the detailed geomechanical parameters of rocks, together with laborious computation using a high-rank computer hardware, an analytical-empirical method has been developed at Central Mining Institute, Poland, to make prediction (modelling) of the distribution of pressure values (vertical component of stress) in SIGMAZ coal seams. It is based on geophysical measurements, generalized for the conditions of the Upper Silesia Coal Basin, of disturbing effect of the mining edge and tectonic faults on the state of stress. The paper presents methodological and programming assumptions of the method. The scope of its application has been discussed, and results of demonstration analyses for Polish hard coal mines presented. There have been also given the advantages of the method in relation to classical numerical methods. | KABIESZ Józef MAKóWKA Janusz | 2009 | Mining Science and Technology2009，19，5： | 2 |
| 4 | A phase Ⅰ/Ⅱ trail of single-agent PTK 787/ZK 222584 (PTK/ZK),a novel,oral angiogenesis inhibitor,in combination with either temozolomide or lomustine for patients with recurrent glioblastoma multiforme (GBM)显示文摘 | Reardon D Friedman H Yung WKA | 2004 | Proc Am Soc Clin Oncol2004，22，110： | 1 |
| 5 | Enzymic modi- fication of extruded soy protein concentrates as a method of obtaining new functional food components显示文摘 | Sur 6 wka K Zmudzi fi ski D Sur 6 wka J | 2004 | Trends in Food Science&Technology2004，15，： | 1 |
| 6 | Dynamics of mitochon-drial DNA evolution in animal:amplification and sequencing with conserved primers显示文摘 | Kouch TD Thomas WKA Meyer SV | | 0，，： | 1 |
| 7 | Enzymic modification of extruded soy protein concentrates as a method of obtaining new functional food components显示文摘 | Surówka K Zmudzi(n)ski D Surówka J | 2004 | Trends in Food Science and Technology2004，15，34： | 1 |
| 8 | Clinical Value of Transurethral Second Resection of Bladder Tumor: Systematic Review显示文摘 | Jakub Dobruch Andrzej Borówka Harry W. Herr | 2014 | Urology2014，，： | 1 |
| 9 | Adernovirus-mediated p53 gene therapy for human gliomas显示文摘 | Yung WKA Sawaya R | 1999 | Neurosurgery1999，45，5： | 1 |
| 10 | Properties of refrigerated ground beef treated with potassium lactate and sodium diacetate显示文摘 | Mirostaw Fik Krzysztof Sur e wka Boeena Firek | 2008 | Journal of the Science of Foods & Agricuhure2008，88，1： | 1 |
| 11 | Studies on the recovery of proteinaceous substances from chicken heads: II - Application of pepsin to the production of protein hydrolysate显示文摘 | Krzysztof Sur o wka Miros aw Fik | 1994 | Journal of the Science of Food and Agriculture1994，65，3： | 1 |
| 12 | Quality and shelf life of calcium-enriched wholemeal bread stored in a modified atmosphere显示文摘 | Fik M Surówka K Maciejaszek I | 2012 | Journal of Cereal Science2012，56，2： | 1 |
| 13 | Antioxidative response of Mesembryanthemum crystallinum plants to exogenous SO2 application显示文摘 | Surówka E Karolewski P Niewiadomska E | 2007 | Plant Science2007，172，： | 1 |
| 14 | On conventionality of signs显示文摘 | Ho?ówka Teresa | 1981 | Semiotica1981，，12： | 1 |
| 15 | Enzymatic modification of extruded soy protein concentrate as a method of obtaining new functional food components显示文摘 | Sur ó wka J Sur ó wka J | 2004 | Trends Food Sci Technol2004，15，： | 1 |
| 16 | Transrectal ultrasound screening for prostatic carcinoma with histopathologiccor- relation显示文摘 | Stilmant MM Kuligo wka E | 1993 | Cancer1993，71，6： | 1 |
| 17 | Enzymic modification of extruded soy protein concentrates as a method of obtaining new fynctional food components显示文摘 | SUR(O)WKA K (Z)MUDZINSKI D SUR(O)WKA J | 2004 | Trends in Food Science and Technology2004，15，3： | 1 |
| 18 | Determination of Ketoprofen Enantiomers in Human Serum by Capillary Zone Electrophoresis:Man Pharmacokinetic Studies After Administration of Rac-Ketoprofen Tablets显示文摘 | Franciszek K Glówka | 2002 | Journal of Pharmaceutical and Biomedical Analysis2002，30，4： | 1 |
| 19 | A phase Ⅰ /Ⅱ trial of PTK787/ZK 222584 (PTK/ZK), a novel oral angiogenesis inhibitor in combination with either temozolomide or lomustine for patients with recurrent glioblastoma multiforme (GBM)显示文摘 | Reardon D Friedman H Yung WKA | 2004 | Am Soc Clin Oncol Annu Meet2004，，： | 1 |
| 20 | Enzymic modification of extruded soy protein concentrates as a method of obtaining new functional food components显示文摘 | Surówka K Zmudzinski D Surówka J | 2004 | Trends Food SciTechnol2004，15，12： | 1 |
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