“挤压-挠曲”复合底鼓机理及相似模拟技术研究

Mechanism of "Extrusion-deflection" Compound Floor Heave and Research of Analog Simulation Technology

底板自身的受力状态、周围岩体的物理力学特征以及巷道的布置位置、相邻巷道的开掘方式等造成了深埋巷道层状底板底鼓机理的差异。现场大量事实表明,阳煤五矿+211水平皮带运输巷的底鼓属于一种"挤压-挠曲型"复合底鼓,且底鼓的发生位置不是常见的底板中央。通过对复合底鼓机理的理论分析,结合相似材料模拟试验,分析了深埋巷道底板变形、垂直应力和水平应力分布规律。该研究对了解非对称条件下深埋巷道"挤压-挠曲"复合底板围岩变形规律具有一定的指导意义。

The different mechanisms of floor heave in deep roadway layer bottom was caused by the stress of floor itself,physical and mechanical characteristics of surrounding rock mass,layout location of roadway,digging way of adjacent tunnel and so on.A large number of field facts indicate that the floor heave of ＋21 1 level belt transport lane in Yangquan coal group No.5 coal mine belongs to a kind of＆quot;squeeze-deflection＆quot;compound floor heave,and floor heave location happened is not a common floor center.Through theory analyzing of compound mechanism of floor heave,combined with the similar material simulation experiment,analyzes the deep roadway floor deformation,verti-cal stress and horizontal stress distribution law.The study to understand under the asymmetric condition deep buried roadway ＆quot;extrusion-deflection＆quot;composite floor surrounding rock deformation law has a certain guiding significance.