巷道底板软弱夹层厚度对底鼓影响的模拟分析

发布时间：2018-06-23 11:05

本文选题：软弱夹层 + 底鼓　；参考：《采矿与安全工程学报》2017年03期

【摘要】：地层中软弱夹层对地下工程的稳定具有重要的影响,为研究巷道底板中软弱夹层在不同应力场环境下对巷道底鼓的影响,通过理论分析、数值模拟方法,分析了不同厚度夹层在不同埋深和不同侧压系数条件下巷道底板变形特征、底板岩层破坏规律及其对底鼓发生的影响。研究结果表明:浅埋深条件下巷道底鼓与夹层厚度、侧压系数呈正相关;中等埋深条件下巷道底鼓与较薄夹层、侧压系数呈正相关,而巷道底鼓量与较厚夹层、侧压系数呈先正相关后负相关;深埋条件下巷道底鼓与夹层厚度、侧压系数呈先正相关后负相关;浅埋深条件下软弱夹层及中等埋深条件下的较薄软弱夹层在巷道底鼓中起到弱化底板岩体的作用,中等埋深条件下较厚软弱夹层及深埋条件下软弱夹层在巷道底鼓中起到吸能和阻隔应力释放的作用;弱化底板岩体条件底鼓控制采用加固的方法,吸能和阻隔应力释放条件底鼓控制采用浅部岩体加固、深部岩体卸压的方法。
[Abstract]:In order to study the influence of weak intercalation in roadway floor on roadway floor heave in different stress field environment, through theoretical analysis and numerical simulation method, the soft intercalation has an important influence on the stability of underground engineering. In this paper, the deformation characteristics of roadway floor, the law of floor rock failure and its influence on the occurrence of floor heave are analyzed under the conditions of different buried depth and different lateral pressure coefficient of interlayer with different thickness. The results show that the thickness of roadway floor and the thickness of interlayer are positively correlated with the coefficient of lateral pressure under the condition of shallow buried depth, and the coefficient of lateral pressure is positively correlated with the thickness of interlayer in the condition of medium depth of burial, while the amount of floor heave of roadway is positively correlated with the thick interlayer. The lateral pressure coefficient was positive correlation and then negative correlation, and the lateral pressure coefficient was positive correlation and negative correlation under the condition of deep buried roadway floor and interlayer thickness. The weak intercalation under shallow burial depth and the thin weak interlayer in medium buried depth play a role in weakening the floor rock mass in the roadway floor heave. The thicker weak intercalation in medium depth and the weak intercalation in deep burying play an important role in absorbing energy and blocking the release of stress in roadway floor heave, and the method of strengthening is adopted to control the floor heave in weakening bottom rock mass condition. In the condition of absorbing energy and releasing barrier stress, the method of controlling the bottom drum is adopted to strengthen the shallow rock mass and relieve the pressure of the deep rock mass.
【作者单位】：河北工程大学矿业与测绘工程学院;河南理工大学深井瓦斯抽采与围岩控制技术国家地方联合工程实验室;河北省煤炭资源综合开发与利用协同创新中心;
【基金】：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) 河北省高等学校科学技术研究项目(QN2016230)
【分类号】：TD327.3

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