a method of support
A hose and slurry technology, which is applied in earthwork drilling, shaft equipment, wellbore lining, etc., can solve the problems of difficult installation, heavy overall weight of the support, and high linear density of the support, and achieve low cost and easy transportation and installation. Effect
Active Publication Date: 2019-01-01
NORTH CHINA INST OF SCI & TECH
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Problems solved by technology
[0003] (1) The bracket is processed and formed on the ground, transported to the ground in multiple arcs, and assembled at the work site, the installation process is complicated
[0004] (2) The linear density of the support is high, and the installation is difficult. Generally, it is necessary to erect the scaffold first and then install the support. The installation speed is slow and the labor intensity of the workers is high.
[0005] (3) Most of the brackets are made of steel, the overall weight of the bracket is large, and the cost of the bracket is relatively high
Method used
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Embodiment 1
[0041] figure 1 It is a schematic flow chart of an embodiment of the support method of the present invention. see figure 1 , a support method according to an embodiment of the present invention, comprising the steps of:
[0042] S11. Preliminarily forming a hose with a predetermined length at the working position;
[0043] In this embodiment, the flexible pipe can be a flexible pipe with a metal wire on the side wall, or a warp and weft mesh pipe or a PVC (Polyvinyl chloride) pipe, etc., as long as it is easy to fold and bend and has the required tensile strength. Can.
[0044] The hose can be cut into a predetermined length in advance and then transported to the workplace; a certain length of hose can also be temporarily cut according to the perimeter of the site excavation space.
[0045] Can adopt one or several support devices L such as hydraulic point column or common steel pipe, also can use the metal wire that is connected with the anchor bar or 1 set of flexible pi...
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The embodiment of the invention discloses a support method, and relates to the technical field of surrounding rock supporting. The support method includes the steps that a flexible pipe with a preset length is initially molded at the working position; grout is injected into the flexible pipe through a grouting opening, the flexible pipe bulges under the effect of the pressure of the grout, gas inside the flexible pipe is exhausted to the outside of the flexible pipe through an air exhausting device installed on the flexible pipe at the same time, and the air exhausting device is closed after the flexible pipe is filled with the grout; the grout is continuously injected into the flexible pipe, and the flexible pipe expands under the effect of the pressure of the grout to actively apply the pressure to surrounding rock; after the pressure inside the flexible pipe reaches the preset pressure, the grouting opening is closed; and the grout injected into the flexible pipe solidifies. The support method is suitable for surrounding rock supporting.
Description
technical field [0001] The invention relates to the technical field of support, in particular to a flexible support and a support method. Background technique [0002] Rigid metal brackets are often used in underground engineering, especially mine roadways, secondary support of mine roadways, and mountain tunnels, including U-shaped steel brackets, I-shaped steel brackets, and steel pipe concrete brackets. The common characteristics are: [0003] (1) The bracket is processed and formed on the ground, transported to the ground in multiple arcs, and assembled at the work site, and the installation process is complicated. [0004] (2) The linear density of the support is high, and the installation is difficult. Generally, it is necessary to build a scaffold first and then install the support. The installation speed is slow and the labor intensity of the workers is high. [0005] (3) Most of the brackets are made of steel, the overall weight of the bracket is large, and the cos...
Claims
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IPC IPC(8): E21D11/10
CPCE21D11/10
Inventor 李学彬
Owner NORTH CHINA INST OF SCI & TECH