近距离开采上覆岩层结构特点研究

Study on the overlying strata structure characteristics during mining close distance coal seam

结合五矿83206工作面工程背景及其开采过程中覆岩结构运移特征构建出了"散体—块体"顶板结构模型,分别从岩层特征、强度、完整性、煤层采动影响以及顶板围岩应力与稳定性系数等方面分析对顶板稳定的影响。同时综合考虑顶板岩层的厚度、强度、裂隙发育程度、采动影响等各方面因素,确定顶板稳定性分类指标,这对矿井的安全开采提供一定的理论指导。

Combined with the engineering background of 83206 working face and overburden structure migration characteristics in the process of mining, set up the ＂granular - block＂ roof structure model, analyzed the influence of rock characteristics, strength, integrity, the influence of coal mining and roof rock stress and stability coefficient on the roof stability, at the same time, considering the factors such as the thickness, the strength of the roof strata, the development degree of the fractures, the influence of the mining and so on, the classification indexes of the roof stability are determined, which provided a theory reference for the safety mining.