摘要
在坚硬顶板和底板的“两硬”条件下,对不同煤层厚度和硬度对煤岩体中的垂直应力分布的影响,也即反映了对煤岩体中发生冲击矿压危险性的影响进行了模拟.通过组合煤岩试样的试验结果验证了数值模拟的正确性,根据煤岩体相互作用的理论分析了其原因.在“两硬”条件下,煤层厚度与硬度的变化对煤体中的应力分布有着很大的影响,从而对煤岩体系统中冲击矿压的发生有着很大的影响.随着煤层厚度的减小,在煤岩体中产生的应力集中将增大;随着煤层硬度的增加,煤岩体中的最大垂直应力也将增大,从而也增加了冲击危险性.
Since the vertical stress distribution of coal and rock can reflect the risk of rock burst, the influence of hardness and thickness of coal seams with a hard roof and a hard floor on the vertical stress distribution of coal and rock was simulated. The correctness of the simulation was verified by testing the combined sample of coal and rock and the interaction of coal and rock was theoretically analyzed. The hardness and thickness of coal seam play a great role in the vertical distribution of stress in coal and the occurrence of rock burst under the condition of hard roof and hard floor. With the decrease of the coal thickness, the stress in coal and rock will increase, while the harder the coal is, the greater the vertical stress in coal and rock will be, resulting in an increase of risk of rock burst.
出处
《采矿与安全工程学报》
EI
北大核心
2006年第3期277-280,共4页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(50474068
50074030
50490273)
教育部博士点基金项目(20030290017)
关键词
坚硬顶底板
数值模拟
冲击矿压
组合煤岩
冲击危险性
hard roof and hard floor
numerical simulation
rock burst
coal and rock combination
rock burst hazard
