Evidence map›Paper›PMID 40789899›Full record

ArticleScientific reports2025

Permeability of the composite coal in the grouting section around the CBM drainage borehole in the coal mine.

Lei Zhang, Yan Cao, Hongyu Pan, Jiawei Tian, Yuhang Chu, Tianjun Zhang

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Scientific reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

2 citing papers in PubMed.

  1. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors.

Lei ZhangCollege of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, PR China.
Yan CaoCollege of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, PR China. 23220089050@stu.xust.edu.cn.
Hongyu PanCollege of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, PR China.
Jiawei TianCollege of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, PR China.
Yuhang ChuCollege of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, PR China.
Tianjun ZhangCollege of Safety Science and Engineering, Xi'an University of Science and Technology, Xi'an, 710054, PR China. tianjun_zhang@xust.edu.cn.

Funding

National Natural Science Foundation of China 52104216National Natural Science Foundation of China 52274226National Natural Science Foundation of China 52374228
6 · The paper itself

Abstract

The leakage of borehole during CBM drainage leads to a significant decrease in concentration, severely restricting the effectiveness of gas drainage in the coal seam. After grouting in the gas pre-drainage boreholes, the slurry around the borehole forms a grout-graded composite structure with the broken coal, and its permeability is a key factor affecting the sealing. Triaxial seepage tests of the composite specimen were conducted with different degrees of fragmentation and moisture content to investigate its permeability. The relationship between structure of the specimen, stress and permeability was studied. The results showed that the polarization effect and the water plug effect were observed in the graded and composite specimens respectively. The water plug effect in the composite specimens inhibited the permeation, as evidenced by a decrease in permeability with increasing equivalent Talbot index or Talbot index of the lower part of composite coal (LPC), which was further aggravated by higher moisture content of the LPC. The intensity of the water plug effect was related to these factors, and their combined increase further enhanced the effect. This study provides insights into the gas seepage mechanism around boreholes and offers a theoretical foundation for the CBM drainage in coal mine.

Indexed as

CBM drainageComposite coalDrainage boreholeMoisture contentPermeabilityWater plug effect

Identifiers

PMID40789899
PMCPMC12340156

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