突出发动过程中煤岩-瓦斯系统能量失衡致灾机制研究

项目名称： 突出发动过程中煤岩-瓦斯系统能量失衡致灾机制研究

项目编号： No.51504084

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： 安丰华

作者单位： 河南理工大学

项目金额： 20万元

中文摘要： 我国煤与瓦斯突出灾害严重，并随着采深的增加日益严峻。近年来防突技术在快速发展，而作为理论指导的突出机理研究相对落后。突出机理研究需要由定性化认识向定量化研究转变。本项目采用实验和理论分析相结合，对突出发动过程中煤体损伤对煤岩-瓦斯系统突出能量积聚与可承受能力的影响进行研究。首先通过煤岩全应力应变过程中瓦斯解吸及声发射实验，确定煤岩损伤裂隙扩展对基质瓦斯释放能力影响规律。然后建立考虑煤体损伤影响的煤体弹性能、解吸瓦斯膨胀能计算公式，结合构建的突出发动前期煤岩-瓦斯演化模型，确定突出前期煤体损伤破坏过程中煤岩-瓦斯系统突出潜能演化规律。最后通过不同力学、瓦斯加载条件下突出模拟实验，由突出是否发生确定煤岩-瓦斯系统可承受的最大能量，研究煤体损伤对系统能量承载能力的作用规律，进而揭示煤岩-瓦斯系统能量失衡致灾机制。项目的开展将有利于突出机理的定量化、模型化，为煤矿防突工作的发展提供理论基础。

中文关键词： 突出机理；裂隙演化；突出潜能；基质瓦斯解吸；声发射

英文摘要： Coal and gas outburst is serious in China, and becomes more severe as the mining depth increase. In recent years outburst prevention technique is developing rapidly, while the outburst mechanism research as the guide is relatively backward. The outburst mechanism research needs turn to quantitative study from qualitative understanding. Through experiment and theory analysis, this project would study the effect of coal mass damage in the outburst launch process on outburst energy accumulation and the energy bearing capacity of coal and gas system. Firstly, through the test of gas desorption and sound emission in the whole stress-strain process of coal, the effect of coal mass damage on coal matrix gas desorption would be analyzed. And then considering the effect of coal mass damage, the formula of coal mass elastic energy and desorption gas expansion energy is established, and combining the evolution model of coal and gas before outburst, the evolution of outburst energy before outburst initiation is studied. Finally, through the physical simulation experiment of coal and gas outburst with different conditions of mechanical and gas loading, the maximum energy of coal and gas system could be determined by the result whether or not outburst occurs. And the effect of coal mass damage on energy carrying capacity of coal and gas system could be studied, and then the action mechanism of energy unbalance of coal and gas system in outburst initiation would be uncovered. This project is beneficial for the quantitative and modeling of coal and gas outburst, and could provide the fundamental basis for outburst prevention work development.

英文关键词： Outburst mechanism;Fracture evolution;Outburst energy;Coal matrix gas desorption;Sound emission