高应力作用下含瓦斯煤岩灾变演化机制研究

项目名称： 高应力作用下含瓦斯煤岩灾变演化机制研究

项目编号： No.51274086

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 李化敏

作者单位： 河南理工大学

项目金额： 82万元

中文摘要： 随着煤矿开采深度的增加，原始应力增高，瓦斯含量和瓦斯压力增大，煤层赋存条件和开采环境恶化，高应力含瓦斯煤岩冲击或突出等的失稳过程剧烈，灾变性后果严重。因此，针对高应力作用下含瓦斯煤岩灾变演化机制这一科学命题，通过自行研制的具有动静组合加载功能的大型含瓦斯煤岩复合动力灾害模拟实验系统，定量科学描述高应力场作用下含瓦斯煤岩的物理力学特性及动力学响应特性，分析高应力作用下的含瓦斯煤岩多因素耦合破裂失稳演化过程，研究该过程中煤岩与瓦斯耦合作用的动力学规律，探讨应力/应变-煤岩强度-瓦斯压力与动力学响应特征参数的对应关系，建立含瓦斯煤岩失稳的动力学模型，从而揭示含瓦斯煤岩破裂失稳灾变演化机制。该项目的研究对深刻认识深部开采条件下冲击-突出复合型动力灾害的成因及诱发和转化条件，进一步研究预测预防技术和方法奠定重要的理论基础。

中文关键词： 高应力；声发射；动力灾害；含瓦斯煤岩；动静组合载荷

英文摘要： With the development of mining depth, original stress、gas stress and gas content have become higher, coal seam occurrence conditions and mining environment have become worsen, and then coal would happen to transform or fracture by high stress; if the process of transformation and fracture of rock burst and coal and gas bursting is violent, it will lead to disaster. In order to research the evolution mechanism of gas coal rock effected by high stress in the project, we develop a series of simulated experiment fracture evolution of gas coal rock by self-made simulated experimental system which has dynamic load and static load to quantificationally descriptive physical/mechanical characteristics and dynamic response characteristics. Rupture process and dynamic law of coal containing gas affected by high stress and multi factor coupling will be analysed. The corresponding relation between the stress/stain/coal strength/gas pressure and the characteristic parameters of dynamic response will be discussed, dynamic instability model of coal containing gas wil be established; so that the catastrophe evolution mechanism of coal containing gas can be revealed. The research results will be very important for us to learn the transformation conditions between the coal and gas outburst and rock burst on the condition under de

英文关键词： High Stress；Accoustic Emission；Mine Dynamic Disasters；Gas Coal；Dynamic and Static Load