论文部分内容阅读
为分析急倾斜相邻矿体夹层的稳定性,根据急倾斜相邻矿体特殊形态,将夹层简化成上下端固支的受力压杆,并建立了尖点突变模型。研究表明,系统平衡点跨越折痕至上叶时,系统失稳,夹层变形量与夹层物理力学性质有关,与矿房高度呈线性关系;失稳产生能量由矿房尺寸、夹层物理力学性质、采深和上覆岩层容重决定;通过失稳充要条件得出临界条件下矿房沿走向长度与矿房高度的函数关系式,对采场结构参数的科学选择有指导作用。
In order to analyze the stability of the interlayer of steeply inclined adjacent orebodies, according to the special shape of the adjacent steeply inclined orebodies, the mezzanine is simplified as the bearing bar of upper and lower ends, and a cusp catastrophe model is established. The results show that when the equilibrium point of the system crosses the crease to the upper lobe, the system is unstable, and the amount of interlayer deformation is related to the physical and mechanical properties of the interlayer and has a linear relationship with the height of the coal mine. The energy of instability is determined by the size of the coal mine, the physical and mechanical properties of the interlayer, And the weight of the overlying strata is decided. The functional relation between the length of the ore-dressing along the strike and the height of the ore-dressing room under the critical condition is obtained through the necessary and sufficient conditions of instability, which will guide the scientific selection of the stope’s structural parameters.