摘要
针对软底板的地质条件,在分析采场应力分布特点的基础上,建立了煤层聚能结构和顶板悬臂结构的力学模型。通过对软底板煤层和悬顶附加能量源的力学机制和能量演化过程的分析,得出了软底板破坏诱导强冲击倾向性煤体释放能量是发生冲击地压的根本原因,悬顶结构是加剧冲击地压强度的重要因素,并总结了软底板条件下冲击地压显现特征。根据该条件下的冲击显现特征,从底板帮部卸压、加强围岩稳固性和悬顶结构处理等方面,采取了围岩卸压配合巷道支护的冲击地压防治措施,取得了显著的冲击地压防治效果,保证了安全开采。
Based on the analysis of the geologic conditions and stress distribution characteristics of soft floor, the mechanical model of coal seam and the cantilever structure of the roof were established. Based on the analysis of the stress distribution law and the mechanical mechanism and the energy evolution process of coal seam and additional energy source, it was concluded that the failure of soft floor foundation inducing the strong impact tendency coal body to exacerbate compressive energy was the main reason for rock burst, and the cantilever structure was an important factor to increase the intensity of rock burst. The characteristics of the rock burst Under soft floor were summarized. According to the impact characteristics under the conditions, through pressure relief of floor side, strengthening the stability of the surrounding rock and cantilever structure treatment, taking pressure control measures with wall rock pressure relief and roadway support, achieving significant rock burst control effect, ensuring mining safety.
出处
《中国煤炭》
北大核心
2017年第12期72-75,114,共5页
China Coal
基金
国家自然科学基金资助项目(51674159)
国家重点研发计划项目(2017YFC0804201)
关键词
强冲击倾向性煤体
软底板
悬顶结构
防治措施
strong impact tendency coal body, soft floor, cantilever roof structure, prevention and control measures
