Prestress full-length anchoring anchor rope construction method based on common anchor rope construction
A full-length anchoring and construction method technology, which is applied in the direction of earth drilling, bolt installation, mining equipment, etc., can solve the problems of heavy workload, reduced work efficiency, and small excavation section, so as to increase the anti-deformation ability and improve the working efficiency. Efficiency, Ease of Development Effects
Inactive Publication Date: 2015-05-27
魏兴民 +2
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Problems solved by technology
[0002] Prestressed full-length anchoring anchor cable support has been widely used in the field of rock and soil. Due to the high degree of mechanization of excavation in ground rock and soil, water conservancy, hydropower, and metal mines, the excavation section is relatively large, and large-diameter drilling is generally used to cooperate with grouting. However, due to the influence of various factors in coal mine underground roadway, generally the excavation section is small, and the application of large equipment is less, so the grouting anchor with exhaust pipe in large drilling is limited. The use of ordinary grouting anchor cables requires construction of large drilling holes, complex construction and heavy workload, which greatly reduces work efficiency
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[0024] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0025] refer to Figure 1-3 A kind of prestressed full-length anchor cable construction method based on ordinary anchor cable construction described in this specific embodiment includes the following steps:
[0026] a. At the construction position of the coal mine underground roadway, after temporary support, the eye position is calibrated according to the predetermined design, and the MQT-120 / 2.7 rock bolt rig with the drill bit diameter set to φ32mm is used to drill holes 3 at the eye position;
[0027] b. After drilling hole 3, the rock bolt rig opens the large water gate to clear the hole, and rinses the rock powder in hole 3;
[0028] c. Take the 7φ21.6mm prestressed steel strand and the anchor cable 2 with a length of 5000-8000mm, and install the anchor cable anti-seepage sleeve 4 on the non-anchor end of the anchor cable 2 for standby;
[002...
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The invention relates to a prestress full-length anchoring anchor rope construction method based on common anchor rope construction. The prestress full-length anchoring anchor rope construction method comprises the following steps: drilling a hole position by adopting an anchor rod drilling machine; opening a large water gate cleaning hole by the anchor rod drilling machine; ejecting a resin anchoring agent into the hole by using an anchor rope anchoring end; pushing an anchor rope by the anchor rod drilling machine and stirring the resin anchoring agent by rotating the anchor rope; mounting an anchor rope grouting plug on an anchor rope anti-seepage sleeve; mounting an anchor rope tray on the anchor rope grouting plug; forming a grouting hole in the anchor rope tray and mounting an anchor rope lockset on the anchor rope tray; penetrating one end of a grouting pipe into the grouting hole; applying pressure to the anchor rope lockset by using an anchor rope tensioning machine; and when slurry flows out from the central end face of a non-anchoring end of the anchor rope, stopping grouting and finishing the grouting operation. The prestress full-length anchoring anchor rope construction method has the beneficial effects that the operation is simple and convenient; the development of a surrounding rock broken rock zone is effectively alleviated; the slurry is sufficiently glued with a surrounding rock after being condensed, and a rock body anti-deformation capability is effectively enhanced; the time is effectively utilized and the working efficiency is improved.
Description
technical field [0001] The invention relates to the technical field of mine roadway support, in particular to a prestressed full-length anchor cable construction method based on ordinary anchor cable construction. Background technique [0002] Prestressed full-length anchoring anchor cable support has been widely used in the field of rock and soil. Due to the high degree of mechanization of excavation in ground rock and soil, water conservancy, hydropower, and metal mines, the excavation section is relatively large, and large-diameter drilling is generally used to cooperate with grouting. However, due to the influence of various factors in coal mine underground roadway, generally the excavation section is small, and the application of large equipment is less, so the grouting anchor with exhaust pipe in large drilling is limited. The use of cable, adopts common grouting anchor cable construction, needs to construct big borehole, and construction is complicated, and workload i...
Claims
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IPC IPC(8): E21D20/02
CPCE21D20/025E21D20/003
Inventor 魏兴民王振伟谈力
Owner 魏兴民