Formation Environment of Main Brown Coal Seam in Xi-2 Minefield of Shengli Coalfield Based on Coal Ash Phase Analysis

Wang, Boyang; Qin, Yong; Shen, Jian; Wang, Gang; Li, Jiuqing

doi:10.1007/s12594-018-0960-4

Cited by 2 publications

(2 citation statements)

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“…Processes 2024, 12, 602 5 of 20 where m ∑ j=1 X k i denotes the total fuzzy importance of a single element in the matrix in comparison with other elements in its dominant layer, which can be obtained by a fuzzy addition operation, and the calculation formula is shown in Equations ( 5)- (7).…”

Section: Consistency Testmentioning

confidence: 99%

“…At present, most of the evaluation methods of coal reservoirs are mainly based on gas content and permeability. However, coal reservoirs buried deep below the ground surface are actually part of a complex environmental system with multiple factors acting together [6,7]. In China, the formation conditions for coalbed methane and the history of reservoir tectonic evolution are relatively complex, resulting in large regional differences in geological parameters [8].…”

Section: Introductionmentioning

confidence: 99%

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An Evaluation of the Coalbed Methane Mining Potential of Shoushan I Mine Based on the Subject–Object Combination Weighting Method

Liu,

Yang,

Jin

et al. 2024

Processes

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The parameters of coalbed methane reservoirs have large differences, and the precise values cannot represent the resource and production characteristics of the whole block. In order to address these problems, an index system for evaluating the production potential of coalbed methane blocks was constructed, the weights of evaluation parameters were determined, and a model for the preferential selection of coalbed methane blocks based on the subjective–objective combination of weights method was established. The main coal seams (No. 2-1 and No. 4-2) of the Pingdingshan-Shoushan I Mine Block were taken as the research objects to rank the development potential of CBM blocks in a preferential way. The results show that the six resource and production parameters of No. 2-1 coal are gas content, top and bottom rock properties, coal seam thickness, coal seam depth, coal body structure, and tectonic conditions, in descending order of importance, and the parameters of No. 4-2 coal are gas content, coal body structure, coal seam thickness, top and bottom rock properties, coal seam depth, and tectonic conditions, in descending order of importance. It is predicted that the favorable CBM gas development sweet spot areas of the No. 2-1 coal seam and No. 4-2 coal seam will be located along the exploration wells W15–W29 and W31, respectively. This paper aims to make a multi-dimensional and more comprehensive evaluation of coalbed methane mining potential in the Shoushan I mine, and provide a technical basis for the next step of coalbed methane mining in the study area.

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Section: Consistency Testmentioning

confidence: 99%