论文部分内容阅读
为研究洞室锚杆在爆破荷载作用下的受力特征,依据Froude比例分析法,建立了加锚洞室的室内地质力学模型。对锚固洞室不同部位锚杆的应变峰值进行分析,同时对同一根锚杆不同部位应变进行比较分析。结果表明,在爆破荷载作用下,对锚固洞室同一工作面上的锚杆,其拱脚部位锚杆应变峰值明显大于其他部位相应处的;而在同一根锚杆中,最大应变峰值出现在杆体的中部位置,靠近洞壁的一端应变最小,围岩内部的一端应变居中。
In order to study the mechanical characteristics of bolt in cavern under blasting load, an indoor geomechanical model of caving cavern is established according to Froude’s proportional analysis method. The analysis of peak strain of anchors in different parts of anchoring caverns and the comparative analysis of the strain of different parts of the same anchor. The results show that under the action of blasting load, the peak value of bolt strain at the anchor foot on the same working face of anchor cavern is obviously larger than that of other parts. In the same bolt, the peak of maximum strain appears at The middle position of the rod body, near the end of the cave wall strain is the smallest, one end of the surrounding rock strain is centered.