A kind of grouting reinforcement bolt suitable for high stress broken surrounding rock support
A technology of crushing surrounding rock and grouting reinforcement, which is applied in the installation of bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of small bolt resistance and small axial contact area, and achieve increased contact area, Improve the pull-out resistance and eliminate the effect of damage
Active Publication Date: 2020-05-19
SINOSTEEL MAANSHAN INST OF MINING RES CO LTD
View PDF13 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to solve the problems of small axial contact area with surrounding rock and low pull-out resistance of the existing grouting bolt after construction, and to provide a support suitable for high stress broken surrounding rock. Grouting reinforcement bolt for protection
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0024] In order to further describe the present invention, a grouting reinforcement bolt suitable for high-stress broken surrounding rock support of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0025] Depend on figure 1 The present invention is shown a kind of grouting reinforced anchor rod structure schematic diagram before installation which is suitable for high-stress broken surrounding rock support and combined with figure 2 It can be seen that a kind of grouting reinforcement anchor rod suitable for high-stress broken surrounding rock support of the present invention contains a hollow grouting rod body 1, a nut 2, a nut washer 3, a tray 4, a grouting stopper 5, and a hollow grouting The rod body 1 is threaded, and the nut 2, the nut washer 3, the tray 4, and the grout stopper 5 are sequentially installed on the outer end of the hollow grouting rod body 1 from outside to inside. The expan...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a grouting reinforcing anchor rod suitable for supporting during high-stress surrounding rock crushing. A nut (2), a nut gasket (3), a tray (4) and a grout stopping plug (5) are sequentially installed at the outer end of a hollow grouting rod (1) from outside to inside, an expansion sleeve (6) is sleeved with the hollow grouting rod (1), and an anti-pulling barb (11) integrated with the hollow grouting rod is welded to the head portion of the inner end of the hollow grouting rod (1); a grout outlet (8) is formed in the hollow grouting rod; a kerf (9) is machined in theexpansion sleeve (6) in the axial direction. By applying prestress, non-uniform expansion of radial size of the anchor rod sleeve (6) can be achieved, and the expanded anchor rod sleeve is embedded ina surrounding rock. Grouting is carried out after the stress of the surrounding rock is unloaded in the radial direction through the anchor rod, so that joints and cracks in the original broken rockare combined again to form a compact rock structure under the action of grouting slurry and high expansion prestress, and therefore the surrounding rock is reinforced.
Description
technical field [0001] The invention relates to a grouting reinforced bolt, which is especially suitable for rock mass support under high stress conditions in support fields such as deep well mining, high stress wells and tunnels, where joints and fissures develop. Background technique [0002] At present, bolts are widely used in the field of surrounding rock support as a support method with low cost, obvious effect and convenient on-site construction. In mine roadway construction, hollow grouting bolts include advanced hollow grouting bolts for pre-support and system radial bolts for composite lining arches of general roadways. They are mainly used in moderate-good surrounding rocks with geological conditions. Permanent system support and advanced pre-support, this system can be used independently according to different lithological conditions, and can also be used in combination with small grouting conduits, pipe sheds, etc. to obtain better support effects. [0003] In ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): E21D21/00E21D20/02
CPCE21D20/02E21D21/0073
Inventor 孙国权李宁肖益盖刘海林汪为平王雨波尤元元李鸿飞
Owner SINOSTEEL MAANSHAN INST OF MINING RES CO LTD