梁向阳, 方刚, 武义强,等.巴拉素煤矿劈裂注浆裂隙扩展机理研究[J].河南理工大学学报（自然科学版）,2025,44(4):104-111.

LIANG X Y, FANG G, WU Y Q, et al. Investigation of the fissure propagation mechanism of fracture grouting in the Balasu Coal Mine [J]. Journal of Henan Polytechnic University (Natural Science) , 2025, 44(4): 104-111.

巴拉素煤矿劈裂注浆裂隙扩展机理研究

梁向阳1, 方刚1,2, 武义强1, 王赋宇3, 刘洋1,4, 张嘉凡5

1.中煤科工集团 西安研究院有限公司，陕西 西安  710054；2.陕西省煤矿水害防治技术重点实验室，陕西 西安  710077；3.西安科技大学 建筑与土木工程学院，陕西 西安  710054；4.西安科技大学 地质与环境学院，陕西 西安  710054；5.西安科技大学 理学院，陕西 西安  710054

摘要: 目的 注浆改造是富水煤矿灾害防治的有效手段，研究富水高压作用下煤体的注浆劈裂效应对实际工程有重要意义。 方法 基于离散元流-固耦合机理，引入“域”与“管道”概念，对注浆劈裂过程进行流固耦合计算。将流体“域”作为储水“水库”，其由颗粒圆心连线构成的三角形区域组成，“管道”为模型中流体的运移通道，将各个流体“域”连接起来，通过光滑平行板模型对其表征。采用单轴压缩试验和巴西劈裂试验标定数值模型细观参数，建立劈裂注浆数值模型，模拟煤岩体劈裂后的力链分布规律，分析注浆压力和侧压力系数对裂隙扩展的影响。 结果 结果表明：无围压时，孔周煤岩颗粒接触力为0.02~0.10 MPa，有围压时，孔周颗粒接触力为0.06~0.12 MPa；等围压条件下，围压越大，试样应力集中范围越大，劈裂扩散距离越短；同一围压下，注浆压力越大，试样劈裂距离越长；围压不等时，裂隙平行于最大主应力方向发育。 结论 采用较高注浆压力可有效驱替煤层裂隙中的水体和空气，减少钻孔工程量，降低成本。研究结果有益于注浆参数的选取，可为今后类似工程提供有意义的技术支持。 

关键词:煤岩劈裂;注浆加固;流固耦合;数值模拟;扩展机理

doi: 10.16186/j.cnki.1673-9787.2024010021

基金项目:国家自然科学基金资助项目（12172280）；陕西省自然科学基金重点资助项目（2020JZ-53）

收稿日期:2024/01/17

修回日期:2024/09/18

出版日期:2025/06/19

Investigation of the fissure propagation mechanism of fracture grouting in the Balasu Coal Mine

Liang Xiangyang1, Fang Gang1,2, Wu Yiqiang1, Wang Fuyu3, Liu Yang1,4, Zhang Jiafan5

1.Xi’an Research Institute （Group） Co.， Ltd.， China Coal Technology and Engineering Group Corporation， Xi’an  710054， Shaanxi， China；2.Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard， Xi’an  710077， Shaanxi， China；3.College of Architecture and Civil Engineering， Xi’an University of Science and Technology， Xi’an  710054， Shaanxi， China；4.School of Geology and Environment， Xi’an University of Science and Technology， Xi’an  710054， Shaanxi， China；5.College of Sciences， Xi’an University of Science and Technology， Xi’an  710054， Shaanxi， China

Abstract: Objectives Grouting modification is an effective technique for preventing and controlling water-related disasters in coal mines. This study investigates the fracture grouting effects on coal under high-pressure， water-rich conditions， which is of great practical significance for engineering applications.  Methods Based on a fluid-solid coupling mechanism in discrete element modeling， the concepts of “domain” and “pipeline” are introduced to simulate the coupling process during fracture grouting. The fluid “domain，” considered as a water reservoir， consists of triangular regions formed by connecting particle centers. The “pipeline” represents fluid migration paths connecting these domains， modeled using smooth parallel plate structures. The meso-parameters of the numerical model are calibrated using uniaxial compression and Brazilian splitting tests. A numerical model of fracture grouting is established to simulate force chain distributions after coal fracturing and to analyze the influence of grouting pressure and lateral pressure coefficients on fissure propagation.  Results The results show that without confining pressure， the contact force between particles around the borehole ranges from 0.02 to 0.10 MPa， while under confining pressure， it ranges from 0.06 to 0.12 MPa. Under equal confining pressure， higher confining pressure leads to wider stress concentration zones but shorter fracture propagation distances. At the same confining pressure， increasing grouting pressure extends the fracture propagation range. Under unequal confining pressure， fractures tend to develop parallel to the direction of the maximum principal stress. Conclusions Higher grouting pressure can effectively displace water and air from coal seam fissures， reduce the number of boreholes required， and lower operational costs. The results provide valuable guidance for the selection of grouting parameters and offer technical support for similar engineering applications. 

Key words: coal-rock fracturing; grouting reinforcement; fluid-solid coupling; numerical simulation; propagation mechanism