五阳煤矿大采高工作面覆岩运动规律及巷道支护研究

发布时间：2018-04-12 09:24

本文选题：大采高综放 + 复合关键层　；参考：《中国矿业大学（北京）》2015年博士论文

【摘要】：大采高工作面由于矿压显现剧烈、巷道变形严重，研究大采高工作面的覆岩移动理论及大断面巷道围岩控制技术对于采矿工程具有重要意义。通过深基点多点位移计及钻孔电视窥视法、数值模拟及理论分析，揭示了大采高工作面巷道不稳定的破坏机理，提出了大采高工作面岩层移动可通过复合关键层理论来分析计算。分析表明大采高工作面顶板周期性垮落步距分布在[9.0m,14.0m]之间，，具有正态分布特征。研究认为大采高工作面覆岩沉降变化随着采动进行而不断变化的时间和空间动态变化过程，把FLAC模拟结果转化到三维Surfer软件获得了三维覆岩移动规律，这可直观获得大采高工作面上覆岩层的全局动态时空变形情况。锚杆支护中预应力是个关键参数，对于五阳煤矿大采高工作面巷道，应选取强度大、直径大的强力锚杆，分析了典型工作面回风巷变形破坏机理，提出了采用预应力加长锚固锚杆锚索支护系统的巷道支护设计方案，采用大采高工作面巷道锚杆动态支护信息设计法，充分利用施工过程中提供的各类信息，实时进行信息收集、信息分析与信息反馈，在大采高工作面巷道围岩控制中取得良好效果。
[Abstract]:The overlying rock movement theory and the surrounding rock control technology of large-section roadway in large mining face are of great significance to mining engineering because of the severe mine pressure and the serious deformation of roadway.The failure mechanism of roadway instability in large mining face is revealed by numerical simulation and theoretical analysis by means of deep base point multi-point displacement meter and borehole television peep-view method.It is put forward that the movement of rock layer in large mining face can be analyzed and calculated by the theory of compound key layer.The analysis shows that the roof collapse distance of large mining face is in the range of [9.0m ~ 14.0m], which has the normal distribution characteristic.It is considered that the time and space dynamic change process of overburden subsidence changes with mining movement in large mining face. The FLAC simulation results are transformed into 3D Surfer software to obtain the 3D overburden movement law.The global dynamic temporal and spatial deformation of overlying strata on the face of large mining height can be obtained intuitively.The prestress is a key parameter in bolt support. For the roadway of large mining height working face in Wuyang coal mine, the strong bolt with large strength and large diameter should be selected, and the deformation and failure mechanism of return air roadway in typical working face is analyzed.The design scheme of roadway support with prestressed extended anchor bolt and anchor cable support system is put forward. The dynamic support information design method of roadway in large mining face is adopted to make full use of all kinds of information provided in the construction process.Information collection, information analysis and information feedback are carried out in real time, and good results are obtained in surrounding rock control of roadway in large mining face.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2015
【分类号】：TD353

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