河南理工大学学报（自然科学版）2025，Vol.44Issue(5)：72-81,10.DOI:10.16186/j.cnki.1673-9787.2023070018
裂隙岩体凝胶类材料注浆封孔控制范围影响因素分析
Analysis of factors influencing the control range of grouting and hole sealing with gel-like materials in fractured rock masses
摘要
Abstract
Objectives In coal mine gas drainage projects,the fractured rock mass penetrated by through-layer boreholes serves as a key channel for gas seepage.The effective diffusion range of grouting materials within the fractured surrounding rock directly affects the integrity and airtightness of borehole sealing.To improve the quality of gas drainage,this study analyzes the factors influencing the control range of grouting and hole sealing in fractured rock masses.Methods Using a guanidine-based gel material for grouting and sealing,a fracture grouting model of the rock mass surrounding a gas drainage borehole was established.The response surface methodology(RSM)was employed to design a multi-factor experimental scheme and analyze the data.A random fracture field model was constructed in the surrounding rock using the COMSOL Multiphysics platform to simulate the effects of fracture density,grouting pressure,material vis-cosity,and fracture aperture on the effective diffusion range of the sealing material.Results The signifi-cance ranking of influencing factors on the effective injection range is as follows:fracture aperture,mate-rial viscosity,fracture density,and grouting pressure.Optimizing the engineering-controllable variables(grouting pressure and material viscosity)can effectively mitigate the adverse effects of geological-uncontrollable variables(fracture density and fracture aperture)on the diffusion range.Conclusions Based on the observed fracture characteristics in rock layers(e.g.,aperture and density),the grouting pressure and material viscosity should be dynamically adjusted.For cases with narrow fractures where the material is difficult to fully penetrate,increasing grouting pressure enhances material permeability,and selecting low-viscosity grout improves injectability and diffusion in micro-fractures,thereby improving sealing compact-ness,airtightness,and overall effectiveness.关键词
响应面法/扩散范围/材料黏度/注浆压力/数值模拟Key words
response surface methodology/diffusion range/material viscosity/grouting pressure/numerical simulation分类
矿业与冶金引用本文复制引用
刘晓,张宇恒,宣德全,谢佳伟,蔺海晓,徐森..裂隙岩体凝胶类材料注浆封孔控制范围影响因素分析[J].河南理工大学学报（自然科学版）,2025,44(5):72-81,10.基金项目
国家自然科学基金资助项目(51974108) （51974108）
河南省重点研发与推广专项(科技攻关)(232102320231) （科技攻关）
