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Bedding-dependent fracture behavior and 3D topography of anthracite: NSCB and CSTBD tests

delete2026-08-11
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PRE
AI
S
Shuang Gong *
G
Guoda Fan
J
Jiasen Chen
C
Can Ding
J
Jiale Huang
W
Wen Wang
Y
Yuanlu Ma
DOI：10.1016/j.tafmec.2026.105862delete
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Abstract

Abstract

En 中文
Constructing an extensive fracture network is the key to increasing coalbed methane (CBM) production. This paper conducts loading tests on notched semi-circular bend (NSCB) and cracked straight-through Brazilian disc (CSTBD) coal specimens with three bedding angles (0°, 45°, and 90°). Combined with digital image correlation (DIC) and 3D scanning technologies, the fracture mode, crack opening displacement (COD), and fracture surface topography were investigated. The results show that the fracture mode evolution is not monotonic, but the bedding angle significantly dominates the COD evolution; the roughness presents an “inverted V-shape”, with the 45° specimen being the roughest, while low angles are controlled by weak planes. This study provides a basis for hydraulic fracture network stimulation.
Keywords:
Bedding angle
NSCB
CSTBD
Fracture mode
Fracture surface

Journal

Theoretical and Applied Fracture Mechanics cover
Theoretical and Applied Fracture Mechanics
IF:
5.6
Papers:
4.4K
Citations:
1.3W

Organization

H
henan polytechnic university
Scholars:
1.2W
Papers: 7.0K
Citations: 5
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