摘要
从义马煤田强冲击倾向性、高地应力水平、F_(16)逆冲断层和上覆巨厚坚硬砾岩顶板的复杂地质赋存环境等多因素多角度入手,研究义马矿区冲击地压的主要诱因、机制和特征。结果显示,义马煤田强冲击倾向性和高地应力环境是其频繁发生冲击地压的主要内因;F_(16)逆冲断层赋存条件下水平构造应力的极不均匀分布,使得高应力环境中断层面及附近区域产生应力集中和能量激增,而且F_(16)逆断层斜切穿过巨厚砾岩顶板,使得两者赋存极不稳定,是冲击地压发生的主要外因。冲击地压发生前,F_(16)断层和巨厚顶板积聚的变形能,在电磁辐射强度和支架阻力的监测结果中均显示为步调一致的增大–减小–再增大–再减小的循环变化过程,而突降的现象可作为冲击失稳的前兆信息。
Based on the investigation on high burst proneness,high in-situ stress,F（16） thrust fault and conglomerate roof,the contributing factors,characteristics and mechanism of coal bursts in Yima mining area are studied.It is indicated that the high burst proneness and high in-situ stress are the major intrinsic factors to induce coal burst.The distribution of horizontal tectonic stress under the existence of F（16） trust fault is extremely inhomogeneous,which makes the stress concentration and energy surge in the high stress environment and the surrounding area.The roof and fault are in the unstable conditions under the influence of conglomerate roof separated by F（16） thrust fault.These are the main external factors to induce coal burst in Yima mining area..Therefore,the electromagnetic radiation and support resistance could be observed as the process of increase,decrease,increase again and decrease again before the occurrence of coal bursts.The sudden decrease of indicator could be identifies as precursory information of coal bursts.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2017年第A02期4085-4092,共8页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(41502184)
中国矿业大学深部岩土力学与地下工程国家重点实验室开放基金资助(SKLGDUEK1722)
北京市自然科学基金资助项目(2164067)~~
关键词
采矿工程
义马煤田
冲击地压
逆冲断层
巨厚砾岩顶板
电磁辐射
mining engineering
Yima mining area. coal bursts
thrust faults
conglomerate roof with largethickness
electromagnetic radiation
