恒阻大变形锚杆力学特性及其工程应用

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Abstract Traditional rigid anchor bolts allow the deformation of surrounding rock of roadway generally below 200 mm. The rigid anchor bolts often appear tensile failure because they can?t adapt to the large deformation of surrounding rock. A type of anchor bolts with constant resistance and large deformation was therefore manufatured，which can provide the constant resistance and stable deformation. This type of anchor bolt is mainly composed of a constant resistance device and an elastic rod，which is suitable for supporting the surrounding rock in soft rock or deep roadways to effectively control the engineering disaster of rock burst etc. The anchor bolts of constant resistance and large deformation were tested with an experimental system developed in house. The experimental results show that the maximum value of the accumulated deformation of the anchor bolts with constant resistance is up to 1 000 mm. Field tests were also performed in the roadway support of a typical deep and soft rock mine with good effect.

Key words： mining engineering constant resistance and large deformation anchor bolt dynamic impact experimental system static tensile experimental system

Received: 01 November 2013

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http://www.rockmech.org/EN/Y2014/V33/I7/1297

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