地震诱发煤矿瓦斯灾害成核机理的探讨  

The mechanism of earthquake-induced gas disaster nucleation in coalmines

作　　者：李铁[1] 蔡美峰[1] 

机构地区：[1]北京科技大学土木与环境工程学院

出　　处：《煤炭学报》2008年第10期1112-1116,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50490271,40244021);辽宁省自然科学基金资助项目(20042184)

摘　　要：基于现场地球物理观测,以煤矿矿震助推瓦斯异常涌出和地下水对远场地震的响应机理作为类比,结合大尺度地壳同时运动的地球物理学证据,探索地震能量导致煤矿瓦斯灾害成核的可能性和机理.分析得出,地震能量具备导致煤矿瓦斯灾害成核的可能性,其机理和条件为:地震震中与含瓦斯矿井间需要有活动构造作为能量传递的通道;地震能量对煤矿有约小于20 d的短周期调制作用;强烈地震在短临阶段甚至产生大尺度地壳同步运动;存在大面积地下水异常区域极有可能也是含瓦斯矿井敏感响应的区域.提出了此种机制瓦斯灾害预警的思路.Based on in-situ geophysical observation, by means of the mechanism analogy of rockburst-induced unusual gas emission in coalmines and groundwater-response to far field earthquake and geophysics observation of the isochronous movement over a wide area on lithosphere, the possibility and the mechanism of earthquake-induced unusual methane gas emission in coalmines was investigated. It is cognizant of the feasibility that earthquake energy can induce unusual gas emission in coalmines. The active structures are required as energy channels between epi- center and coalmines. The modulation of earthquake energy to coalmines is less than about 20 days. The isochronous movement over a wide area on lithosphere is generated by stronger earthquake in the short-term and impending stages. The region in unusual groundwater over a wide area is likely to the region of sensitivity response eoalmines. It is suggested to provide methane gas emission warnings to coalmines located within the influence radius when re- leasing earthquake risk warnings.

关 键 词：地震 矿震 瓦斯异常涌出 预警 冲击地压 

分 类 号：TD712[矿业工程—矿井通风与安全]