ArticleScientific reports2025
Bidirectional permeability characterization of composite specimen of graded crushed coal bodies.
Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
Abstract
In the gas drainage project of a coal mine, the permeability of the coal body around the borehole is a key factor affecting the drainage efficiency, which is significantly affected by the degree of coal body crushing. To study the permeability of the coal body with different degree of crushing around the borehole, a composite specimen with different Talbol index in the upper and lower positions were prepared by the grading theory, and a triaxial permeability test was carried out by using improved LFTD1812-3 permeability meter, to analyze the influence of the effective stress and equivalent Talbot index on the pore structure and permeability of the composite specimen. The results show that the permeability and porosity of the composite specimen are negatively correlated with the effective stress and positively correlated with the equivalent Talbot index. The permeability tends to be stabilized, which might be caused by the structural solidification of the coal specimen by continuous loading. The pore throat effect occurring in the interface of the composite specimen may lead to the bidirectional permeability observed in the composite specimen. This study provides insights into the gas seepage mechanism around boreholes and offers a theoretical foundation for the seepage of a composite specimen.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.