Grouting anchor cable fixed-length anchoring and fixed-length grouting anchoring device and supporting method

Abstract

The invention discloses a grouting anchor cable fixed-length anchoring and fixed-length grouting anchoring device and a supporting method, and is particularly suitable for the field of anchor rod supporting of repeated disturbance of coal roadways and gob-side entry driving. According to the device and the method, a split split conical anchor ring and an inner conical ring sleeve are fixedly embedded in a wedge shape to form an anchor ring sleeve, and the anchor ring sleeve is arranged at the front end of the grouting anchor cable to achieve fixed-length anchoring of a specific burial depth coal roadway; an anchor ring sleeve and an anchor fluke sleeve which are arranged on the two sides of a grout outlet of the grouting anchor cable form a closed drilling space with the fixed length, and therefore fixed-length grouting reinforcement of a specific surrounding rock fracture area is completed; fixed-length anchoring and fixed-length grouting of the grouting anchor cable enable the surrounding rock anchoring structure to have higher bearing performance and certain buffering and yielding characteristics, the surrounding rock anchoring structure fully adapts to the influence of stress fluctuation, and long-term stability of multiple disturbances of the coal roadway can be achieved; and the anchoring device is simple in structure, convenient to operate, low in cost and remarkable in application effect.

Description

technical field [0001] The invention relates to a grouting anchor cable fixed-length anchor and fixed-length injection anchoring device and a support method, which are especially suitable for multiple disturbance coal roadways and gob-side roadway, and belong to the field of bolt support. Background technique [0002] With the continuous increase of coal mining depth in my country, the stress state of the surrounding rock of the roadway gradually deteriorates, and the continuous disturbance of multiple mining stresses intensifies the deterioration of the surrounding rock of the coal roadway. Therefore, the surrounding rock control of the deep mining coal roadway is an urgent problem. engineering problems. [0003] Anchor bolt, anchor cable and anchor-grouting joint support and grouting reinforcement technology are widely used in deep multiple disturbance coal roadways, and anchor-grouting support can effectively improve the anchorage strength of damaged surrounding rock throu...

AI Technical Summary

Problems solved by technology

The full-length anchoring and grouting support of the anchor cable can be realized by anchoring first and then injecting or injecting first and then anchoring, which can achieve the double effect of anchoring and grouting to strengthen the damaged surrounding rock, but the full-length bonding eliminates the freedom of the anchor cable body. section, which enhances the anti-deformation ability of the anchor grouting structure, reduces its reserved deformation, and weakens the adaptability to the deformation of deep rock mass with strong expansion and long rheology; especially in deep percussive mines, the full length of the anchor Anchor grouting cushioning performance is weak, and it is easy to cause the overall failure of the anchoring structure when subjected to strong impact; at the same time, under the current limited grouting pressure, the effect of full-length grouting reinforcement is not good

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