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为了给采空区瓦斯抽放高位钻孔的设计提供依据,通过物理相似模拟实验,研究分析了东欢坨矿3088工作面覆岩破坏规律。通过研究发现,由于工作面上覆岩层中的灰白色细砂岩具有遇水软化的特性,从而使得采场上覆岩层纵向裂隙在该岩层呈现周期性贯穿-非贯穿的规律,而灰白色细砂岩的这一周期性破坏规律对瓦斯升浮具有重要影响,为达到良好的瓦斯抽放效果,给出了采场抽放钻孔进行高低搭配设计的建议。
In order to provide a basis for the design of high-level gas drainage boreholes in goaf, through the physical simulation experiment, the failure rule of overlying strata in 3088 working face of Donghuantuo Mine was studied. Through the research, it is found that the longitudinal fissures in overlying strata of stope are periodically penetrating-non-penetrating in this stratum due to the softening of gray-white fine sandstone in the overburden of working face, A cyclical damage rule has an important influence on gas lift. In order to achieve a good gas drainage effect, a design suggestion of high and low drainage holes in stope is given.