A bolt and cable support method for roadway surrounding rock failure monitoring

Abstract

The invention discloses a bolt cable support method for monitoring of roadway surrounding rock failure. The bolt cable support method comprises the steps that a plurality of roadway drilled holes areformed in a roadway, and a displacement sensor is arranged in each roadway drilled hole; displacement data are collected through the displacement sensors, and the damage degree of the roadway is judged through combining of the displacement data and the arranging positions of the displacement sensors; and bolt cable support is conducted on the roadway according to the roadway damage degree obtainedin the step (2). According to the bolt cable support method for monitoring of the roadway surrounding rock failure, a precise monitoring method based on deformation of roadway surrounding rock is utilized, the deformation amount of the plastic failure surrounding rock of the roadway surrounding rock can be determined, and information is more accurate and timely. The bolt cable support method canrealize intelligent design of roadway support parameters, and application of workers on a site is greatly facilitated.

Description

technical field [0001] The invention belongs to the technical field of roadway roof support, and in particular relates to a method for designing bolt and cable support parameters, which can achieve the purpose of designing bolt and cable support parameters for the roadway through on-site monitoring data analysis and processing of roadway surrounding rock deformation. Background technique [0002] The damage monitoring of the surrounding rock of the roadway can obtain the actual on-site information such as the location, depth, and scope of the surrounding rock damage. A large number of research results show that the deformation and failure of the surrounding rock of the roadway is essentially caused by the formation and development of the plastic zone of the surrounding rock. The geometry of the plastic zone The shape and scope determine the failure mode and degree of surrounding rock. A detailed grasp of the deformation and failure laws of the surrounding rock of this type o...

AI Technical Summary

Problems solved by technology

After visualization, it can only reflect the overall and deformation of the surrounding rock within the length range of the roadway surrounding rock anchor rod, and in places where the roadway damage is relatively large, the anchor rod is easily broken by force, which makes the measurement invalid. Parallel this method It is impossible to accurately measure the deformation of the surrounding rock in the roadway inside the drill hole, because the bolt will deform in the hole due to the force

[0016] Obviously, the above methods all have the disadvantage that they can only measure the force and deformation of the bolt, or can measure the overall deformation of the surrounding rock in the borehole. At this time, limited by the length of the bolt, they can only test the bolt within the length of the bolt. However, it is impossible to obtain more comprehensive damage information and the specific damage location information of the roadway surrounding rock inside the borehole. This method has certain limitations.

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