Structural aspects of gas and dolomite outburst in Rudna copper mine, Poland

Wierzbicki, M.; Młynarczuk, M.

doi:10.1016/j.ijrmms.2012.08.007

Cited by 27 publications

(25 citation statements)

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“…At the same time, the concentration of methane inside the measuring chamber after comminuting sample 16v2 increased by 0.29%, which corresponds to a release of 2.58 cm 3 of methane from a sample weighing 1 kg. Another gas released from the sample was nitrogen, which-as the main component of the gas mixture contained in the pore pressure of the dolomite-was found in the post-outburst masses collected from the spot in the "Rudna" mine where the tragic incident happened in 2009 (Wierzbicki and Młynarczuk 2013).…”

Section: Resultsmentioning

confidence: 99%

“…The classical theory of gas and rock outbursts assumes that the value of the energy of the gas accumulated in the rock pores has to be high enough for the gas to do work when destroying the rock and transporting it down the excavation Sobczyk 2014;Skoczylas 2014;Tian et al 2016). The high porosity values of dolomite (from 15.6 to 16.8%) and the pore pressure of gas exceeding 5.3 MPa were among the main reasons for the outburst of dolomite and other rocks that occurred in the "Rudna" copper mine in Poland in September 2009 (Wierzbicki and Młynarczuk 2013).…”

Section: Discussionmentioning

confidence: 99%

“…The measuring system consists of a high-speed, hermetic percussive mill equipped with a set of appropriate sensors of pressure, concentration, and temperature, as well as control systems and data acquisition systems. The paper discusses the results of balancing gases contained in rocks from the copper mines located in the Legnica-Głogów Copper Belt, Poland, where the hazard connected with the presence of gases accompanying the strata exploitation has been increasing in recent years (Wierzbicki and Młynarczuk 2013;. Evaluating the content of gas in rocks of high strength is a difficult task, and the results of research of this type are seldom published.…”

Section: Introductionmentioning

confidence: 99%

“…The outburst of gas and dolomite that took place in the "Rudna" copper mine in Poland, at the depth of 1200 m, was the first such incident in the mining history (Wierzbicki and Młynarczuk 2013). The risk connected with the presence of numerous natural hazards, including gas-related hazards, grows with the depth of exploitation (Hargraves 1983;Díaz Aguado and González Nicieza 2007;Xue et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Balancing the amount and composition of gas contained in the pore space of cupriferous rocks

Kudasik

Skoczylas

2018

Environ Earth Sci

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From the perspective of economy and safety, balancing gas contained in the pore space of rocks is extremely essential, predominantly to establishments dealing with extraction of mineral resources. One of the main methods of evaluating the amount and composition of gas contained in the pore space of a rock is releasing the gas as a result of comminuting the investigated rock material. In the case of cupriferous rocks, effective comminution is a very difficult task, due to the strength properties of these rocks. The present paper discusses the results of studies into the gas content of cupriferous rocks, obtained by means of an original device named the GPR analyzer. The research was done on 41 samples of dolomites and anhydrites from various areas of two copper mines located in Poland: "Rudna" and "Polkowice-Sieroszowice." For all samples, on the basis of microscope analyses performed on cuts and polished sections, the open porosity, closed porosity, and total porosity were determined. In the case of the dolomite samples, the total porosity variability fell in the range of 4.75-23.05%, and in the case of the anhydrite samples-in the range of 3.87-16.60%. The maximum gas content of the dolomite samples was 166.67 cm 3 /kg, and of the anhydrite samples-84.66 cm 3 /kg. In some of the studied samples, the presence of methane was confirmed. Toxic gases, such as H 2 S, were not found. The main gas in the pore space of the investigated rocks was nitrogen. Knowing the amount of the released gas and the value of the closed porosity in the investigated samples, the authors were able to estimate the pore pressure of the gas, whose maximum value was 0.583 MPa.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Balancing the amount and composition of gas contained in the pore space of cupriferous rocks

Kudasik

Skoczylas

2018

Environ Earth Sci

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“…According to the majority of theories and scientific research, a rock and gas outburst is triggered mainly by the energy of gases released from a rock mass and a necessary condition for it to occur is the presence of gas pockets in a rock mass (Li et al [10], Jiang et al [7]). Additional factors that contribute to the occurrence of an outburst are among others different structural properties of a rock mass in its restricted areas, changes of tensions of a rock mass due to its exploitation as well as a working face approaching faults (Shepherd et al [15], Xue et al [18], Lianchong et al [11], Wierzbicki and Młynarczuk [17]). …”

Section: Introductionmentioning

confidence: 99%

Structural and Textural Characteristics of Selected Copper-Bearing Rocks as One of the Elements Aiding in the Assessment of Gasogeodynamic Hazard

Pajdak

Kudasik

2017

Studia Geotechnica Et Mechanica

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Abstract:The characteristics of copper-bearing rocks that include the structural and textural parameters are an important factor determining a possible gas accumulation in those rocks. In September 2009, in the Rudna copper mine in Poland, an outburst of gases and dolomite occurred. The analysis of the outburst mass showed that one of the main causes of the outburst was the different structural properties such as high porosity and presence of gas in the pores. This paper presents data from the structural analysis of dolomite from the Polkowice-Sieroszowice copper mine and the Rudna copper mine. Seven rock samples from various areas of the mines were tested by the following methods: mercury porosimetry (MIP), low pressure gas adsorption (LPNA), scanning electron microscopy (SEM), computed microtomography (micro-CT). The SEM analyses of the rock samples allowed pores of various sizes and shapes to the observed. The porosity (MIP) of the dolomite changed in the range of 3-15%. The total micro and mesopore volume (LPNA) was from 0.002 cm 3 /g to 0.005 cm 3 /g. The macropore volume (MIP) was from 0.01 cm 3 /g to 0.06 cm 3 /g and the mean macropore diameter was from 0.09 µm to 0.18 µm. The dolomite samples varied in the surface area (LPNA) (0.7-1.5 m 2 /g) and the pore distribution. The structure of dolomite determines the possibility of the occurrence of gasogeodynamic phenomena and hence it is urgent that research be conducted into its changeability. To better understand the gasogeodynamic processes in copper-bearing rocks, it is necessary to constantly monitor and analyse in detail those areas that have different structural properties.

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The Data Exploration System for Image Processing Based on Server-Side Operations

Ładniak

Piórkowski

Młynarczuk

2013

Computer Information Systems and Industrial Management

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Part 4: Pattern Recognition and Image ProcessingInternational audienceIn this paper the possibilities for construction of an ad hoc search system to examine large-sized raster image data sets, e.g. rock images or medical images, for analysis of its characteristic parameters are presented. A new solution for image exploration based on any attributes extracted with computer image analysis by using extensions for server-side operations is proposed

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Structural aspects of gas and dolomite outburst in Rudna copper mine, Poland

Cited by 27 publications

References 9 publications

Balancing the amount and composition of gas contained in the pore space of cupriferous rocks

Balancing the amount and composition of gas contained in the pore space of cupriferous rocks

Structural and Textural Characteristics of Selected Copper-Bearing Rocks as One of the Elements Aiding in the Assessment of Gasogeodynamic Hazard

The Data Exploration System for Image Processing Based on Server-Side Operations

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