Rapid anchoring method for coal mine roadway anchor rod

Abstract

The invention discloses a rapid anchoring method for a coal mine roadway anchor rod. The method mainly comprises the following steps of: filling two resin capsules with different solidifying times in turn when the anchor rod is installed, wherein one of the resin capsules is a rapidly-solidified resin capsule of which the solidifying time is not more than 10 seconds, and the other of the resin capsules is a common resin capsule; filling the rapidly-solidified resin capsule into the position at the bottom of a hole; after clamping a screw cap of the anchor rod by using a drilling machine with a special sleeve, continuously pushing rotation in the torque of 150 N.m; stirring the two capsules to the bottom at one time, still continuously rotating after stirring to the bottom until the rapidly-solidified resin capsule is solidified within 10 seconds; after the rapidly-solidified resin capsule is solidified, not rotating the anchor rod, but continuously rotating the screw cap until a screw nut damping plug is opened, and removing the drilling machine; and tightening the screw cap by using the drilling machine and a torque amplifier in the torque of 400 N.m to finish installation. By the method, the stirring and the installation of the drilling machine of the anchor rod are finished at one time, so that installation time is shortened, headspace time for tunneling a working surface is reduced, and the installation efficiency of the anchor rod is improved.

Description

technical field [0001] The invention relates to coal mine roadway support technology, in particular to deep mine high-stress broken soft rock roadway support. Background technique [0002] At present, resin-anchored metal bolts are commonly used in coal mine roadway support, and the installation process is as follows: [0003] 1. Drill bolt holes on the surrounding rock of the roadway according to the design, and use MQT-120 pneumatic bolt drilling rig or 7665 pneumatic drill to drill holes. [0004] 2. Fill 1-2 ordinary rolls of resin medicine into the eye of the anchor rod, and push it into the fundus with the anchor rod; [0005] 4. After the roll reaches the fundus, use a pneumatic coal drill with a special sleeve to clamp the anchor nut, start the drill and stir the roll with a torque of 120N.m for 30-45 seconds, wait for 5-10 seconds and then remove it ; [0006] 5. After the resin drug roll is solidified for 10 minutes, use a pneumatic coal drill and a torque ampli...

AI Technical Summary

Problems solved by technology

In areas with low mining depth and non-strong structural stress, this contradiction is often not prominent, and the success of support covers up the essence of the problem. When the mining depth is greater than 800 meters and the structural stress is large, the contradiction is particularly prominent, so the current installation process Can't resolve conflicts

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