Once supporting method for reinforced anchor rod in deep tunnel
A bolt and powerful technology, which is applied in the installation of bolts, earthwork drilling, mining equipment, etc., can solve the problems of ineffective control of roadway surrounding rock deformation, small bolt row spacing, and slow driving speed, etc., to improve roadway support The effect of reducing the support density, improving the strength and stiffness
Inactive Publication Date: 2007-05-23
TIANDI SCI & TECH CO LTD
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Problems solved by technology
[0006] The purpose of the present invention is to provide a method for one-time support of strong bolts in deep roadways of coal mines, so as to solve the problems of small row spacing between bolts, slow driving speed, and inability to effectively control deep high stress conditions existing in the existing bolt support technology. The problem of surrounding rock deformation in the roadway
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[0017] Referring to Fig. 1, the specific implementation process of the present invention is:
[0018] Lay metal mesh 4 on the top surface of the roadway top 3; set W steel belt on the metal mesh 4; drill support holes 10 at the top of the roadway, and clear the holes; Tray 6, spherical pad 7, antifriction gasket 8, and screw on the torque nut 9; the low-viscosity resin drug roll (shown by mark 1 in Fig. 1 is the solidified resin) is loaded into the support hole 10, and then Insert the top of the strong anchor rod 2 into the support hole 10, stir the resin medicine volume 1 for a specified time (8s-35s), stop stirring, wait for about 1 minute, and then tighten the nut with a pneumatic wrench. So far, a supporting strong anchor has been installed, and the above process is repeated to install other anchors.
[0019] The key processes in the above process are:
[0020] 1. The low-viscosity resin coil is combined with fast and slow solidification resin coils. The process is: firs...
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Abstract
A deep channel strong anchor bar support method features in the strength, rigidity of the protection system The high intensity is realized through the strong anchor bar with BHR no less than 600, diameter no less than 22mm, yield strength no less than 600 MPa, break strength no less than 800 Mpa, extension rate no less than 17%, and the high rigidity is realized through high pre stress, full length anchoring and combined support. The high intensity and rigidity W steel strip means the steel strip thickness no less than 4mm, break force no less than 400 KN, high pre stress means that it reaches 30%-50% of the bar yield strength, full length anchoring using quick, slow and low viscosity resin combining. It can improve the support effect significantly with reduced support density and cost, realizing quick dig of the channel.
Description
technical field [0001] The invention relates to a high-prestressed and strong bolt primary support method for rapid construction in deep coal mine roadways, and the method can also be applied to roadway and chamber support in other departments such as mining, construction, water conservancy, military industry and the like. Background technique [0002] Coal mine roadway support technology is a key technology in coal mining. Keeping the surrounding rock stable and controlling roadway deformation and damage are necessary conditions for mine safety and efficient production. With the development of the depth and breadth of the mine, the problem of roadway support becomes more and more prominent. In recent years, coal roadway bolt support technology has developed rapidly, and has become a necessary supporting technology for mines to achieve high production and high efficiency. [0003] At present, most of the deep high-pressure roadways in China adopt the secondary support meth...
Claims
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Inventor 康红普林健颜立新吴拥政鲍海山
Owner TIANDI SCI & TECH CO LTD