A method of anti-impact support for deep circular roadway
An anti-shock and roadway technology, which is applied in tunnels, earthwork drilling, tunnel lining, etc., can solve problems such as roadway deformation, casualties, equipment damage, etc., and achieve the effects of ensuring safety, good support performance, and avoiding damage
Active Publication Date: 2021-09-28
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology
According to statistics, more than 90% of the rock burst accidents in coal mines occur in the roadway, and the energy accumulated by the coal and rock mass is quickly thrown into the roadway space, causing equipment damage, roadway deformation, and casualties. The support method can effectively solve the support problem of rock burst roadway
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[0021] The present invention provides a support method for deep soft rock circular roadway. In order to make the object, technical solution and effect of the invention clearer and clearer, the following uses schematic diagrams to further describe its implementation in detail. It should be understood that the schematic diagrams of the invention described here are only used to explain the invention, not to limit the invention. The specific implementation is as follows:
[0022] An anti-shock support method for a deep circular roadway is divided into the following steps: After the roadway is excavated, install four sections of 90° corrugated steel brackets (2) close to the roadway wall (1) respectively (see illustration figure 2 with image 3 ), the soft cushion (3), and the concrete-filled steel tube support (4). Use the U-shaped fixture (9) after the slurry is complete (see illustration Figure 4 ) Set the steel pipe concrete support (4), soft cushion (3) and corrugated ste...
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The present invention proposes a method of anti-shock support for deep circular roadways, which includes the following steps: ①After the circular roadway is excavated, starting from the 45° deviation of the top arch of the roadway, the processed 4-section 90° corrugated steel support Install along the ring direction of the roadway; ② Starting from the 45° deviation of the top arch of the roadway, install 4 sections of soft cushion along the ring direction of the roadway; ③ Similarly, install the concrete-filled steel tube support along the ring direction of the roadway. It coincides with the joint of the corrugated steel bracket and soft cushion; ④Use the U-shaped fixing device to fit the corrugated steel bracket, soft cushion, and concrete-filled steel tube bracket at the joint, so that the casing of the steel-filled concrete support is just covered by the U-shaped fixing device Surrounded by; ⑤Anchor rods are installed on the flanges on both sides of the U-shaped fixture, and the anchor rods are driven into the surrounding rock of the roadway through the round hole in the middle of the flanges. The invention not only can bear the large deformation caused by the impact ground pressure, but also can give full play to the supporting force of the steel pipe concrete support, and has good supporting performance.
Description
technical field [0001] The invention belongs to the technical field of roadway support, and relates to a method for supporting rock burst roadways. [0002] technical background [0003] In recent years, with the depletion of shallow coal resources, coal mines have begun to enter the deep, but various problems have followed, among which the problems caused by rock burst are particularly prominent. According to statistics, more than 90% of the rock burst accidents in coal mines occur in the roadway, and the energy accumulated by the coal and rock mass is quickly thrown into the roadway space, causing equipment damage, roadway deformation, and casualties. The support method can effectively solve the support problem of rock burst roadway. Contents of the invention [0004] In order to solve the above problems, the object of the present invention is to propose a method for anti-impact support of deep circular roadways. The present invention is realized through the following t...
Claims
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IPC IPC(8): E21D11/20E21D11/00E21D20/00E21D11/18
CPCE21D11/00E21D11/18E21D11/20E21D20/00
Inventor 左建平刘海雁刘德军文金浩雷博张琪周钰博
Owner CHINA UNIV OF MINING & TECH (BEIJING)