Anchor plug pushing device used for anchor cable supporting structure and anchor cable supporting structure
An anchor cable supporting and pushing device technology is applied in the installation of anchor rods, mining equipment, earth-moving drilling, etc., which can solve the problems of unavoidable loss of pre-tightening force, inability to provide tensile load, affecting the working performance of anchor cables, etc. To achieve the effect of easy operation and maintenance, simple structure, avoid overload tension
Active Publication Date: 2013-10-09
CCTEG COAL MINING RES INST
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Problems solved by technology
During the locking process, the cable body retracts, so that the actual pre-tightening force retained by the anchor cable is only 60-70% of the maximum tensile load, resulting in a loss of anchor cable pre-tightening force
It can be seen that the loss of pre-tightening force of the anchor cable is determined by the installation process, and the current installation process cannot avoid the loss of pre-tightening force
[0005] In order to ensure that the actual pretension force of the anchor cable meets the requirements and increase the installation tensile load of the anchor cable, it is easy to cause the following problems: on the one hand, the anchor cable is over-tensioned, which affects the performance of the anchor cable; on the other hand, the large diameter The anchor cable, due to the limitation of the actual capacity of the tensioning machine, cannot provide sufficient tensile load, resulting in insufficient pretension of the anchor cable
Method used
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[0029] The specific implementation manner of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0030] Such as figure 2 As shown, the present embodiment provides an anchor cable support structure, including an anchor cable member, a tension jack 20 and an anchor plug pushing device 30, and the anchor cable member includes an anchor cable tray 4, a self-aligning spherical washer 5, an anchor ring 6 and the anchor plug 7; the anchor cable 2 passes through the anchor cable tray 4, the self-aligning spherical washer 5, the anchor ring 6, the anchor plug 7 and the anchor plug pushing device 30 and is connected with the tension jack 20; when the anchor cable 2 After being stretched to the design pre-tightening force by the tension jack 20, such as Figure 4 As shown, the anchor plug pushing device 30 is used to push the anchor plug 7 into the anchor ring 6 to lock the anchor cable 2 . In this implementation, after the anchor c...
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The invention relates to the field of mine working supporting, in particular to an anchor plug pushing device used for an anchor cable supporting structure and the anchor cable supporting structure. The anchor plug pushing device comprises an outer sleeve, an ejection block and a wedge block, wherein an anchor cable penetrates through the outer sleeve, the ejection block and the wedge block, the ejection block is arranged between the outer sleeve and the anchor cable, the wedge block is arranged on the outer sleeve, an oblique face is arranged at the axial end of the wedge block, the wedge block can slide in the radial direction of the outer sleeve, and when the wedge block slides to enable the oblique face of the wedge block to press the ejection block, an anchor plug is pushed to move by the ejection block. According to the anchor plug pushing device used for the anchor cable supporting structure and the anchor cable supporting structure, loss of pretightening force caused by contracting of the anchor cable is effectively reduced under the condition that normal installation and tension of the anchor cable are not affected, overload tension of the anchor cable is prevented in an installation process, and the working state of the anchor cable is obviously improved. In addition, the anchor plug pushing device used for the anchor cable supporting structure and the anchor cable supporting structure are simple in structure, convenient to operate and maintain, and capable of maintaining stable performance under the mine working condition.
Description
technical field [0001] The invention relates to the field of mine roadway support, in particular to an anchor plug pushing device for an anchor cable support structure and the anchor cable support structure. Background technique [0002] For coal mine roadway bolt support, the bolt is generally used to support the shallow surrounding rock, and the support method is used to anchor and reinforce the deep surrounding rock with anchor cables. The bolt exerts compressive stress on the surrounding rock of the support layer to form a secondary bearing layer, and the anchor cable connects the secondary bearing layer formed by the bolt support with the deep stable rock layer, improving the stability of the bolt support layer and mobilizing the deep The bearing capacity of the surrounding rock improves the overall stability of the support system. During the installation of anchor cable support, it is required to apply an initial pretension force of 40-70% of the breaking load of the ...
Claims
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Inventor 康红普陈金宇杨景贺吕华文林健吴拥政
Owner CCTEG COAL MINING RES INST