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锚杆群的共同作用使锚杆和其锚固范围内的岩体形成一定强度的承载结构,该结构对巷道的稳定性起到至关重要的作用,称之为“锚固复合承载体”。根据自行研制的锚固复合承载体测试系统研究锚杆支护密度对承载体承载特性的影响规律,获得了锚固复合承载体的强度及其破坏特征,揭示了锚固复合承载体中心应力和围岩移近量的变化规律。最后理论计算了锚固复合承载体强度,理论计算结果与修正后实测结果相差不大。
The combination of anchor groups makes the rock bolt and its rock mass within the anchoring range form a certain strength bearing structure which plays a crucial role in the stability of the roadway and is called “anchor composite carrier” . According to the test system of self-developed anchored composite carrier, the influence law of bolt supporting density on the bearing capacity of the carrier is studied. The strength and failure characteristics of the anchored composite carrier are obtained. The stress of the anchored composite carrier and the surrounding rock mass displacement Near the amount of changes in law. Finally, the strength of the anchoring composite carrier is theoretically calculated, and the theoretical calculation result is not much different from the measured result.