河南理工大学学报（自然科学版）2025，Vol.44Issue(4)：104-111,8.DOI:10.16186/j.cnki.1673-9787.2024010021
巴拉素煤矿劈裂注浆裂隙扩展机理研究
Investigation of the fissure propagation mechanism of fracture grouting in the Balasu Coal Mine
摘要
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.Meth-ods 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"do-main,"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 distri-butions after coal fracturing and to analyze the influence of grouting pressure and lateral pressure coeffi-cients on fissure propagation.Results The results show that without confining pressure,the contact force be-tween 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,in-creasing grouting pressure extends the fracture propagation range.Under unequal confining pressure,frac-tures 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 re-quired,and lower operational costs.The results provide valuable guidance for the selection of grouting pa-rameters and offer technical support for similar engineering applications.关键词
煤岩劈裂/注浆加固/流固耦合/数值模拟/扩展机理Key words
coal-rock fracturing/grouting reinforcement/fluid-solid coupling/numerical simulation/propa-gation mechanism分类
数理科学引用本文复制引用
梁向阳,方刚,武义强,王赋宇,刘洋,张嘉凡..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):104-111,8.基金项目
国家自然科学基金资助项目(12172280) （12172280）
陕西省自然科学基金重点资助项目(2020JZ-53) （2020JZ-53）
