A Multi-layer Grouting Reinforcement Method for Surrounding Rock of Soft and Broken Structure of Roadway
A grouting reinforcement, multi-level technology, applied in drilling equipment and methods, tunnels, earthwork drilling, etc., can solve the problems of large deformation of surrounding rock sections of soft and broken structures, save grouting costs, facilitate construction, The effect of improving the overall load-carrying performance
Active Publication Date: 2021-05-25
TAIYUAN UNIV OF TECH
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Problems solved by technology
[0007] The purpose of the present invention is to solve the problem of large deformation of the surrounding rock section of the soft and broken structure of the roadway, realize the filling and compacting of the cracks in the surrounding rock of the soft and broken structure section, improve the strength and rigidity of the structural surface of the surrounding rock of the roadway, and improve the integrity of the surrounding rock, In this way, the deformation of the surrounding rock of the roadway can be effectively controlled to achieve the effect of ensuring the stability of the surrounding rock of the roadway, and a multi-layer grouting reinforcement method for the surrounding rock of the soft and broken structure of the roadway is provided.
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[0039] A multi-layer grouting reinforcement method for roadway soft and broken structure surrounding rock, comprising the following steps:
[0040] Step 1: excavate the soft and broken surrounding rock of the roadway, erect a U-shaped steel shed 10, and spray concrete to form a spray layer 5.
[0041] (1) After excavation and excavation of the soft and broken surrounding rock of the roadway, a U36 steel shed is used for primary support to initially control the deformation of the surrounding rock of the roadway. The tie rods 11 are interlocked to enhance the integrity of the U-shaped steel shed 10 and improve the overall bearing capacity of the U-shaped steel shed 10 .
[0042] (2) The pile spraying operation is carried out within the range of 5~10m in the head of the delayed excavation. The sprayed concrete construction mix ratio is 425# ordinary Portland cement: water: sand: stone: JCT-1 sprayed concrete admixture: Accelerator = 1 : 0.4 : 2 : 2 : 0.06 : 0.04; when performing...
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A multi-layer grouting reinforcement method for roadway soft and broken structure surrounding rock, which belongs to the technical field of mining and geotechnical engineering roadway grouting reinforcement, can solve the problem of large deformation of the roadway soft and broken structure surrounding rock section. The invention adopts multi-layer grouting The reinforcement method is to carry out multi-level grouting operations through existing grouting materials and grouting equipment, which is convenient for construction; through multi-layer grouting reinforcement to the soft and broken structural surrounding rock of the roadway, the external carrier and internal structure formed after grouting reinforcement are used. The bearing body, and the internal and external bearing bodies are effectively connected by grouting anchor cables, which effectively improves the bearing capacity of the soft and broken surrounding rock, controls the deformation of the soft and broken surrounding rock, and improves the overall quality of the soft and broken surrounding rock. It has better bearing capacity, saves the cost of grouting to a great extent, has good economic and social benefits, enhances the overall bearing capacity of the injected body, and realizes the purpose of ensuring the stability of the surrounding rock of the soft and broken structure of the roadway.
Description
technical field [0001] The invention belongs to the technical field of grouting reinforcement for mining and geotechnical engineering roadways, and in particular relates to a multi-layer grouting reinforcement method for roadway soft and broken structure surrounding rocks. Background technique [0002] With the expansion of China's coal mining scale year by year, the geology and geological conditions of the mine are becoming more and more complex, especially when the roadway passes through the soft and broken surrounding rock section, if only the support method of anchor net cable or shed is used at this time , it is difficult to control the deformation of the surrounding rock of the roadway. The anchor mesh cable support in the soft and broken structural surrounding rock will be damaged due to cracking of the surrounding rock and the internal complete structure will disappear, resulting in a decrease in anchorability and the occurrence of the bolt and cable pretensioning pro...
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IPC IPC(8): E21D11/10E21B7/00E21B33/13E21D20/00E21D20/02
CPCE21B7/00E21B33/13E21D11/006E21D11/10E21D11/107E21D20/003E21D20/021
Inventor 郝兵元梁晓敏谢益盛王东亮任兴云和海峰
Owner TAIYUAN UNIV OF TECH