深部开采冲击地压诱发瓦斯异常涌出原因分析
发布时间：2018-11-10 09:35
【摘要】：为研究深部开采冲击地压诱导瓦斯异常涌出致灾机理,分析了深部开采煤体高地应力和高瓦斯含量的物性特征,揭示出冲击地压诱发瓦斯涌出的动力条件和物质条件,结合KozenyCarmen方程建立煤体渗透率与开采影响下损伤裂隙煤体体积应变的关系式。研究结果表明:冲击失稳过程中煤体渗透率增加显著,冲击地压产生的振动效应加速煤体变形破坏,促使瓦斯快速大量涌出;冲击地压孕育过程中的煤体渗透率变化效应、煤体形成剪切滑移面效应、冲击地压诱发的煤岩体振动效应以及煤体温度升高效应的联合作用,导致了冲击地压后瓦斯的异常涌出。
[Abstract]:In order to study the mechanism of abnormal gas emission induced by rock burst in deep mining, the physical properties of high ground stress and high gas content of deep mining coal body are analyzed, and the dynamic and material conditions of gas emission induced by impact ground pressure are revealed. Based on KozenyCarmen equation, the relationship between coal permeability and volume strain of damaged fractured coal under the influence of mining is established. The results show that the permeability of coal body increases significantly in the process of impact instability, and the vibration effect caused by impact ground pressure accelerates the deformation and destruction of coal body, and promotes the rapid emission of gas. The coal permeability change effect, the shear slip surface effect, the coal rock mass vibration effect induced by the impact ground pressure and the coal body temperature rise effect during the inoculation process of the impact ground pressure are combined. This results in the abnormal gushing of gas after the impact ground pressure.
【作者单位】： 西安科技大学能源学院;
【基金】：国家自然科学基金科学仪器基础研究专款资助项目(51327007)
【分类号】：TD712
[Abstract]:In order to study the mechanism of abnormal gas emission induced by rock burst in deep mining, the physical properties of high ground stress and high gas content of deep mining coal body are analyzed, and the dynamic and material conditions of gas emission induced by impact ground pressure are revealed. Based on KozenyCarmen equation, the relationship between coal permeability and volume strain of damaged fractured coal under the influence of mining is established. The results show that the permeability of coal body increases significantly in the process of impact instability, and the vibration effect caused by impact ground pressure accelerates the deformation and destruction of coal body, and promotes the rapid emission of gas. The coal permeability change effect, the shear slip surface effect, the coal rock mass vibration effect induced by the impact ground pressure and the coal body temperature rise effect during the inoculation process of the impact ground pressure are combined. This results in the abnormal gushing of gas after the impact ground pressure.
【作者单位】： 西安科技大学能源学院;
【基金】：国家自然科学基金科学仪器基础研究专款资助项目(51327007)
【分类号】：TD712
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