Simulation of Hydraulic Fracture Propagation in Fractured Coal Seams with Continuum-discontinuum Elements

被引：2

作者：

Zhou, Haifeng ^{[1
,2
]}

Gao, Hui ^{[3
]}

Feng, Chun ^{[4
]}

Sun, Zizheng ^{[5
,6
]}

机构：

[1] Xian Univ Sci & Technol, Coll Energy Engn, Yata Rd 58, Xian 710054, Peoples R China

[2] Shenhua Shendong Coal Grp Corp Ltd, Yulin 719315, Daliuta Town Sh, Peoples R China

[3] Hebei Univ Technol, Sch Civil & Transportat Engn, Xiping Rd 5340, Tianjin 300401, Peoples R China

[4] Chinese Acad Sci, Inst Mech, 15 Beishihuan Xi Lu, Beijing 100190, Peoples R China

[5] Shandong Univ, Sch Qilu Transportat, Jingshi Rd 17923, Jinan 250061, Peoples R China

[6] Shandong Univ, Shenzhen Res Inst, 19 Gaoxin South 4th Rd, Shenzhen, Guangdong, Peoples R China

来源：

JOURNAL OF APPLIED AND COMPUTATIONAL MECHANICS | 2021年 / 7卷 / 04期

基金：

中国博士后科学基金;

关键词：

Continuum-discontinuum element method (CDEM); Hydraulic fracturing; Fractured coal; Hydro-mechanical coupling; CRACK-PROPAGATION; MESHFREE METHOD; FINITE-ELEMENT; DYNAMIC CRACK; FIELD; IMPLEMENTATION; DISCRETE; FAILURE; MODEL;

D O I：

10.22055/JACM.2021.37475.3022

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Creating new fracture networks in coal seams with natural fractures through hydraulic fracturing techniques is an effective method for exploiting coal-bed methane. In this paper, a continuum-discontinuum element method (CDEM) is developed for simulating and assessing hydraulic fracture propagation in coal seams. An elastic-damage-fracture model is proposed for capturing the deformation and cracking processes of fractured coal. A stress-fracture percolation relation is implemented to simulate the hydro-mechanical coupling processes. The influence of X-direction angles, mechanical strengths, distances and lengths of natural fractures are analyzed in detail. The results are potentially useful to optimize the fracturing design.

引用

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页码：2185 / 2195

页数：11

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