注浆孔与围岩裂隙不同位置关系下岩体劈裂特征数值模拟分析  

Numerical Simulation Analysis of Rock Mass Splitting Characteristics Under Different Locations Between Grouting Hole and Surrounding Rock Fractures

作　　者：刘超 赵亚婕 杨铭扬 LIU Chao;ZHAO Yajie;YANG Mingyang(College of Safety Science and Engineering,Xi＇an University of Science and Technology,Xi＇an 710054,China;State Key Laboratory of Deep Coal Mining and Environmental Protection,Huainan 232001,China)

机构地区：[1]西安科技大学安全科学与工程学院,陕西西安710054 [2]深部煤炭开采与环境保护国家重点实验室,安徽淮南232001

出　　处：《煤矿安全》2018年第10期203-206,212,共5页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51674189;51327007);陕西省青年科技新星资助项目(2016KJXX-37)

摘　　要：为了研究注浆时注浆孔与围岩裂隙不同位置关系对岩体劈裂特征的影响,利用RFPAflow软件建立注浆孔与围岩裂隙相交与否2种模型,对裂隙起裂萌发、扩展直至贯通整个过程进行了数值模拟。结果表明:注浆孔与围岩裂隙相交时,首先进行浆液填充,当注浆压力达到裂隙起裂压力时裂隙劈裂并逐步扩展;注浆孔与围岩裂隙不相交时,注浆孔及裂隙距离注浆孔较近的一端首先劈裂并扩展至相互贯通,随后进行浆液填充,裂隙劈裂及扩展。In order to study the influence of the different locations between the grouting hole and the fractures of surrounding rock on the rock mass splitting characteristics, RFPA-flow software is used to establish the grouting hole and the surrounding rock fracture intersect or not two models whether the intersection, the whole process of fissure initiation, propagation and penetration was numerically simulated. The results show that when the grouting hole intersects with the fractures, the slurry is filled first, and when the stress reaches the crack initiation pressure, the fractures are cracked and gradually expanded. When the grouting hole does not intersect with the fissures, the grouting hole and the one end of the crack fissure which is closer to the grouting hole first split and extended until the inter-connected. Then, the fracture is filled with slurry, continuously fractured.

关 键 词：裂隙岩体 注浆 劈裂特征 位置关系 RFPA-flow 数值模拟 

分 类 号：TD313[矿业工程—矿井建设]