缓倾斜厚大矿体崩落法开采隐伏空区顶板冒落过程及机理研究

发布时间：2018-05-26 15:25

本文选题：缓倾斜厚大矿体 + 崩落法　；参考：《采矿与安全工程学报》2017年05期

【摘要】：以程潮铁矿西区开采为工程背景,对无底柱分段崩落法开采过程中,隐伏采空区顶板的冒落过程及破坏形式进行了深入的研究。首先,通过钻孔闭合回路,对顶板冒落过程进行了实时监测,并结合井下开采过程对采空区顶板冒落过程进行了时空分析。然后,基于室内相似材料试验模拟,对隐伏空区顶板变形规律及破坏形式进行了研究,绘制了围岩变形矢量图。研究表明,程潮铁矿隐伏采空区顶板的冒落经历了缓慢冒落(冒落停止)→突然冒落→缓慢冒落(冒落停止)→突然冒落的过程,并与岩石质量及关键层密切相关。冒落带上方岩层往往发生"简支梁"型破坏,顶板发生拉破坏,而拱脚及两侧发生压剪破坏。本文的研究成果,初步揭示了缓倾斜厚大矿体崩落法开采过程中,隐伏采空区顶板的冒落机理,对崩落法开采矿山的安全生产有重要的工程意义。
[Abstract]:Taking the west mining of Chengchao Iron Mine as the engineering background, the caving process and failure form of the roof in the hidden goaf in the mining process of sublevel caving without bottom pillar are studied deeply. Firstly, the roof caving process is monitored in real time through the closed loop of borehole, and the spatial and temporal analysis of the caving process in goaf is carried out in combination with the downhole mining process. Then, based on the laboratory simulation of similar materials, the deformation law and failure form of the roof in the concealed hollow area are studied, and the vector diagram of the surrounding rock deformation is drawn. The study shows that the roof caving in the concealed goaf of Chengchao Iron Mine has experienced the process of slow caving (caving stop) suddenly and slowly caving (caving stop), which is closely related to the rock quality and the key layer. The rock layer above the caving zone often occurs "simply supported beam" type failure, roof tensile failure, and compression and shear failure of arch foot and both sides. The research results of this paper preliminarily reveal the caving mechanism of the concealed goaf roof in the caving process of slowly inclined thick large ore body, which is of great engineering significance to the safety production of caving mining.
【作者单位】：北京科技大学土木与环境工程学院金属矿山高效开采与安全教育部重点实验室;
【基金】：国家自然科学基金项目(51374033) 中央高校基本科研业务费项目(FRF-TP-15-042A1)
【分类号】：TD327.2;TD853.36

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