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巨厚火成岩覆盖条件下多煤层叠加开采顶板覆岩破坏较单层开采复杂的多,为了掌握其发育规律,通过顶板工程地质特征结合井中测流、钻孔电视录象实测分析,并且利用离散单元法模拟分析煤层在叠加开采过程中顶板变形破坏特征,从而对顶板覆岩在采动过程中的离层裂隙空间分布等进行研究,总结出坚硬岩层覆盖条件下的多煤层叠加开采覆岩变形破坏的规律。
In order to grasp its development rule, in order to grasp its development rule, through the combination of topological engineering features and borehole current measurement, borehole video recording measurement analysis and the use of discrete elements This paper studied the deformation and failure characteristics of the roof during overburden mining by means of law simulation and studied the spatial distribution of the overlying fractures during the mining process of roof overburden. Summarized the deformation and failure of overlying strata under the condition of hard rock covering The law.