深部复杂应力下开采布置与采动应力协同演化机制研究

项目名称： 深部复杂应力下开采布置与采动应力协同演化机制研究

项目编号： No.51504007

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 矿业工程

项目作者： 张向阳

作者单位： 安徽理工大学

项目金额： 20万元

中文摘要： 随开采深度增加，煤层受力状态及力学行为愈加复杂，使得采场应力分布及动态演化特征研究成为进行开采设计与围岩控制的基础性研究课题之一。项目针对原始地应力、巷道布置和采动应力协同演化机制这一科学命题，采用实验室测试与模拟、计算机数值模拟、理论分析和现场实测相结合的手段，将光缆感测方法用于大范围围岩受力状态连续监测中，对深部复杂应力下三维空间采动应力分布及动态演化特征进行研究，着重分析不同侧压系数、不同开采布置情况下，深部煤系地层采场围岩应力分布、变形破坏及动态演化机理。建立地应力分布与开采布置方式关系模型，分析光缆感测信息变化与采动应力演化的相关性，利用反演分析与等值线图像处理对采场空间围岩应力分布实现三维可视化表达，深入分析并揭示深部复杂应力、开采布置与采动应力分布及动态演化特征的协同演化机制。该研究对深部煤炭开采设计、巷道布置与围岩控制具有重要的理论指导意义。

中文关键词： 深部复杂应力；开采布置；采动应力；光缆感测；协同演化

英文摘要： The coal seam strained condition and mechanical behavior become more complex with the increasing of mining depth. It makes the characteristic of stress distribution and dynamic evolution as a basic research theme to carry out mining design and surrounding rock control in deep mining. In order to explore the co-evolution mechanism among original crustal stress, roadway layout and mining-induced stress, the combined method of laboratory testing, physical modeling, numerical simulation, theoretical analysis and field measurement will be used. Especially, the optical fiber monitoring method monitoring will be used to monitor the strained condition in large-scale surrounding rock. The distributing characteristics and laws of 3-dimensional space mining-induced stress under the complex stress in deep mining are as the research objects. The surrounding rock stress distribution, deformation, fracture and evolution characteristics are emphatically analyzed under different lateral pressure coefficients and different mining roadway layout in deep mining. The relation model between crustal stress and roadway layout will be established, and the relationship between optical fiber sensing information and mining-induced stress evolution will be analyzed. The inverse analysis and 3-dimensional contour will be used to realize the visualization expression of surrounding rock stress distribution. Finally, the co-evolution mechanism among deep complex stress, mining roadway layout and mining-induced stress distribution and evolution characteristics are analyzed and revealed deeply. The study has an important theoretical guiding significance on the design of deep coal mining, roadway layout and surrounding rock control.

英文关键词： deep complex stress;mining roadway layout;mining-induced stress;optical fiber monitoring;co-evolution