地下工程劈裂注浆的数学模型研究

Download: PDF (641KB) HTML (1KB) Export: BibTeX or EndNote (RIS) Supporting Info

摘要文章基于水力压裂法岩体裂隙扩展的研究，利用岩体破裂过程流固耦合分析系统RFPA，建立了岩体劈裂注浆裂隙演化与浆液扩散固化的数学模型，并对岩体进行了劈裂注浆的数值分析。结果表明：注浆劈裂过程中，裂缝的宽度不随压力升高而无限增大，所需的扩缝压力随裂缝增长而降低；在同一岩体中，流体的扩散距离与注浆时间、裂隙宽度、注浆压力成正相关，而与岩体的阻力系数、裂隙长度、浆液运动粘度成负相关；岩体中存在流固耦合效应，岩体渗透率随着围压的升高而降低、裂隙的扩展而增大，但当进行围压卸载时，岩体渗透率又开始回升。该研究对于提高岩体劈裂注浆的效果具有重要意义。

	Service

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	Email Alert
	RSS
	作者相关文章

关键词：地下工程裂隙劈裂注浆数学模型

Abstract： Based on research regarding rock fracture propagation in hydro-fracturing, a fluid-solid coupled rock failure process analysis system (RFPA) is used to establish a mathematical model for fracture propagation and slurry diffusion, as well as consolidation during fracture grouting. A numerical analysis is conducted for fracture grouting in a rock mass. The results show that: 1) in the process of fracture grouting, the width of the fracture does not increase indefinitely with rising pressure, and the required pressure for expanding the fracture decreases with an increase of the fracture length; 2) in the same rock mass, the fluid diffusion distance is positively correlated with the grouting time, fracture width and grouting pressure while it is negatively correlated with the resistance coefficient of the rock mass, the fracture length and the grout's kinematic viscosity; and 3) because of the fluid-solid coupling effect of the rock mass, the permeability of the rock mass decreases with a rise in the confining pressure and increases with propagation of the fracture, but when the confining pressure is unloaded, the permeability of the rock mass increases again.

Keywords： Underground engineering , Fracture , Fracture grouting , Mathematical model

基金资助:

1 煤炭资源与安全开采国家重点实验室自主研究课题基金项目(SKLCRSM08X1)

2 国家级大学生创新训练项目(201310290028)

作者简介: 谢涛锋（1989-），男，硕士研究生，主要从事采矿工程巷道支护方面的研究 E-mail: xietaofengfly@163.com

引用本文:

.地下工程劈裂注浆的数学模型研究[J] 现代隧道技术, 2015,V52(2): 105-109

.A Mathematical Model for Fracture Grouting in Underground Engineering[J] MODERN TUNNELLING TECHNOLOGY, 2015,V52(2): 105-109

链接本文:

http://www.xdsdjs.com/CN/ 或 http://www.xdsdjs.com/CN/Y2015/V52/I2/105