论文部分内容阅读
煤矿覆岩存在空间结构,并且随着采空范围(边界条件)的不同,覆岩的空间结构是动态演化的,并能诱发冲击矿压灾害。基于关键层理论,提出煤矿覆岩的整体空间结构形态,即层面方向的“O-X”结构与剖面方向的“F”结构组成。“O-X”结构与“F”结构的形成与失稳不断进行,称为煤矿覆岩空间结构的动态演化。将覆岩空间结构分为“O-X”型、“F”型与“T”型三种基本类型,对三类空间结构进行细化,分析其矿压特征与规律。基于能量理论,讨论覆岩空间结构演化诱冲的机制,计算三类结构“见方”时的弯曲弹性能,并分析“F”、“T”结构对诱冲的作用。研究拓展传统矿压理论范围,为覆岩结构失稳型冲击矿震预防提供理论指导。
The overburden strata in coal mines present space structure, and with the different of the mined-out area (boundary conditions), the spatial structure of the overburden rocks is dynamic evolutively and can trigger the rock burst. Based on the theory of key layers, the overall spatial structure of overburden strata in coal mines is proposed, that is, the “O-X” structure in the layer direction and the “F” structure in the cross-sectional direction. The formation and instability of the “O-X” structure and the “F” structure continue to be known as the dynamic evolution of the overburden rock’s spatial structure. The overburden rock structure is divided into three basic types: “O-X”, “F” and “T”. The three types of spatial structure are refined and the characteristics and regularity of rock pressure are analyzed. Based on the energy theory, the mechanism of the evolution of the overburden rock’s spatial structure is discussed. The flexural elastic properties of the three structures are calculated. The effect of the “F”, “T” structure on the entrapment is analyzed. Research to expand the scope of the traditional pressure theory, to provide theoretical guidance for the prevention of overburden rock instability impact mining.