Development of a quantitative assessment approach for the coal and gas outbursts in coal mines using rock engineering systems

Zhou, Qinglong; Herrera, Juan; Hidalgo, Arturo

doi:10.1080/17480930.2017.1326077

Cited by 22 publications

(3 citation statements)

References 62 publications

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“…The coals found in those places are characterized by lower strength parameters and higher diffusion coefficient. Those coals have higher permeability than undisturbed coals [21]. They accumulate considerable amounts of gas and, thus, they are its additional source [22].…”

Section: The Geological Disturbances Zone and The Rock And Gas Outburstmentioning

confidence: 99%

Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model

et al. 2019

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The goal of this paper is to analyze the phenomenon of gas emission during a methane and coal outburst based on the unipore Crank diffusion model for spherical grains and plane sheets. Two occurrences in the Upper Silesian Coal Basin were analyzed: an outburst in a Zofiówka coal mine in 2005 and an outburst in a Budryk coal mine in 2012. Those two outbursts differed considerably. The first one was connected with an unidentified tectonic disturbance in the form of a triple, interlocking fault, and the other one is an example of an outburst in an area free from tectonic disturbances. The model analysis required laboratory tests in order to determine the sorption properties of coals from post-outburst masses. Sorption isotherms and the values of the effective diffusion coefficient were specified. The post-outburst masses were subjected to sieve analysis and the grain composition curves were plotted. The researchers also used the measurement data provided by proper mine services, such as the methane content, the volume of post-outburst masses, and the time courses of CH4 concentration changes in excavations. They were recorded by methane measurement systems in the mines.

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Section: The Geological Disturbances Zone and The Rock And Gas Outburstmentioning

confidence: 99%

Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model

et al. 2019

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“…The conditions for the occurrence of coal resources in China are complex and, with the increase in coal mining depth and intensity, the prevention and control of coal and gas outbursts, dust, and mine disasters in general has become more difficult [1][2][3][4][5][6]. At present, the most largely adopted technology in China for reducing the concentration of dust (from the source) is coal seam water injection.…”

Section: Introductionmentioning

confidence: 99%

Coupling Mechanism of Coal Body Stress–Seepage around a Water Injection Borehole

Liu

Yang

et al. 2022

Sustainability

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In China, coal seam water injection technology is widely used in the prevention and control of mine gas and dust disasters. The evolution law of stress–seepage field in the range of hydraulic influence in the process of coal seam water injection is the most basic theoretical problem in coal seam water injection technology. Therefore, this paper first uses the radial seepage experimental system to test the permeability of raw coal samples, and then numerically inverts the stress–seepage evolution law of the coal body around the water injection hole. The results show that the coal seam permeability decreases exponentially with the increase in the experimental overburden pressure. The dynamic water intrusion causes the pressure relief area and the stress concentration area to transfer to the deep part of the coal body, and abnormal stress occurs near the water injection hole wall. The composite stress area formed by the superposition of stress and pore water pressure reduces the permeability of the hole wall. During the radial development of water injection, the pore water pressure dropped sharply and eventually tended to zero, while Darcy’s velocity decreased significantly (within the pressure relief zone, it rapidly decreased from 7.26 × 10−3 m s−1 to 2.5 × 10−3 m s−1 (by 65.56%)). Near the initiation point, the maximum step-down height of Darcy’s velocity decreased from 6.73 × 10−3 m s−1 to 5.27 × 10−3 m s−1 (by 22.73%). This can make it clear that the seepage velocity presents a non-Darcy seepage phenomenon under the influence of pore pressure.

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“…Compared to other methods, such as Analytic Hierarchy Process, it is more suitable for solving the complex problems of interaction and coupling among various factors (Wu et al, 2011). Subsequently, this method was applied to many disciplines, such as ecosystem assessment (Velasco et al, 2006) and gas spontaneous combustion (Zhou et al, 2017), and so on.…”

Section: Introductionmentioning

confidence: 99%

Suitability Evaluation of Shallow Net Cage Culture Based on Interaction Matrix – A Case Study of Xincun Lagoon, Hainan, China

Fang¹

2019

Appl. Ecol. Env. Res.

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Shallow water cage culture is the main marine activity of Xincun Lagoon, Hainan. However, the continuous growth of aquaculture activities not only aggravates the deterioration of the ecological environment of Lagoon, but also affects the healthy development of mariculture. Suitability analysis on net cage mariculture can reduce the pressure of marine ecological environment, increase the yield of aquaculture and alleviate the conflict between different marine activities to a certain extent. However, the interaction of various factors affecting the suitability evaluation of mariculture constitutes a complex system, and the traditional method of weight determination cannot fit the actual situation well. For this reason, this paper attempts to introduce the interaction matrix of rock engineering systems (RES) to evaluate the weight of each index. At the same time, a multi-criteria decision analysis (MCDA) model based on GIS is established. Finally, a continuous graph of the suitability change of shallow sea cage culture in Xincun Lagoon is obtained. The results show that (1) the entrance area of Lagoon is the most suitable area for cage culture in shallow water; (2) the evaluation results are in agreement with the actual situation and previous studies, and the weight determination method is reasonable and feasible.

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Development of a quantitative assessment approach for the coal and gas outbursts in coal mines using rock engineering systems

Cited by 22 publications

References 62 publications

Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model

Methane Emission during Gas and Rock Outburst on the Basis of the Unipore Model

Coupling Mechanism of Coal Body Stress–Seepage around a Water Injection Borehole

Suitability Evaluation of Shallow Net Cage Culture Based on Interaction Matrix – A Case Study of Xincun Lagoon, Hainan, China

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