采矿与安全工程学报2017，Vol.34Issue(3)：504-510,7.DOI:10.13545/j.cnki.jmse.2017.03.015
巷道底板软弱夹层厚度对底鼓影响的模拟分析
Simulation of the influence of thickness of the weak interlayer on the floor heave of the roadway
摘要
Abstract
The weak interlayer has an important influence on the stability of underground engineering in the stratum.In order to study the effect of weak interlayer on the floor heave of roadway under different stress fields,through theoretical analysis and numerical simulation,the characteristics of roadway floor deformation,failure law of floor with the interlayer of different thickness in different burial depths and under different lateral pressure coefficient,and their effect on the occurrence of floor heave were analyzed.The results have shown that in the shallow burial depth,the floor heave of roadway has a positive correlation with thickness of interlayer and lateral pressure coefficient;in the medium burial depth,the floor heave of roadway has a positive correlation with the thinner of interlayer and lateral pressure coefficient,but the amount of floor heave of roadway has a positive-then-negative correlation with the thicker of interlayer and lateral pressure coefficient;in the deep burial depth,the floor heave of roadway has a positive-then-negative correlation with the thicker of interlayer and lateral pressure coefficient;and the weak interlayer with shallow burial depth and the thin weak interlayer with medium burial depth play a weakening role of the floor rocks in roadway floor heave,and the thick weak interlayer with medium burial depth and the weak with deep burial depth play a role of absorbing energy and preventing stress from being released.Therefore reinforcing floor rocks is the proper method to control floor heave under the condition of weakened rocks floor,and reinforcing shallow floor rocks and relieving pressure in deep floor rocks is the proper method to control floor heave under the condition of energy absorption and barrier stress release prevention.关键词
软弱夹层/底鼓/侧压系数/夹层厚度/埋深Key words
weak interlayer/floor heave/lateral pressure coefficient/thickness of interlayer/burial depth分类
矿业与冶金引用本文复制引用
李新旺,孙利辉,杨本生,李强强..巷道底板软弱夹层厚度对底鼓影响的模拟分析[J].采矿与安全工程学报,2017,34(3):504-510,7.基金项目
深井瓦斯抽采与围岩控制技术国家地方联合工程实验室开放基金项目(G201616) （G201616）
河北省高等学校科学技术研究项目(QN2016230) （QN2016230）
