Roadway anchor rod and anchor cable support design method in corrosive mine environment
A technology of anchor cable support and design method, which is applied in mining equipment, design optimization/simulation, tunnels, etc. It can solve the problems of deteriorating the working state of bolts, aggravating corrosion, damage and fracture of rods, etc., so as to ensure long-term stability and reduce corrosion Probability of failure, effect of improving reliability and long-term stability
Active Publication Date: 2022-08-05
CCTEG COAL MINING RES INST
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Problems solved by technology
The increasingly complex mining environment has further deteriorated the working condition of the bolt, and aggravated the corrosion damage and even fracture of the bolt body.
Method used
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Embodiment 1
[0091] Take a mine in the northwest as an example to further illustrate the technical solution of the present invention:
[0092] The roadway numbered F (mining roadway, serviced for 3 years) in a mine in the northwest that is supported by existing bolts and cables, the roof is exposed to water during the entire service process, the ambient humidity is high, and the roadway is supported by bolts, cables and Pallet, metal mesh and other components have obvious corrosion phenomenon. In the roadway of the coal pillar retaining roadway, under the influence of strong mining, part of the bolts and bolts in the roadway are broken, and the roadway is greatly deformed. Carry out bolt bolt and cable support design for the roadway to be constructed with similar environment to roadway F;
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Abstract
The invention discloses a roadway anchor rod and anchor cable support design method in a corrosive mine environment, which comprises the following steps: collecting a water sample in a roadway, and detecting basic properties of the water sample and roadway environment parameters; basic properties of anchor rod and anchor cable materials are detected; corrosion rule experiment parameter conditions are configured; obtaining corrosion rules of anchor rods and anchor cables in the roadway supported by the existing anchor rods and anchor cables; anchor rod stress and anchor cable stress in the roadway supported by the existing anchor rod and anchor cable are detected; and determining a design scheme of the to-be-supported roadway based on the corrosion law of the anchor rods and the anchor cables, the stress of the anchor rods and the stress of the anchor cables. According to the method, the actual supporting environment and the stress conditions of the anchor rods and the anchor cables in the whole service process are comprehensively considered, an effective and highly-targeted supporting design scheme is provided for supporting of similar roadways, and the long-term effectiveness and stability of a roadway supporting system are greatly improved.
Description
technical field [0001] The invention relates to the technical field of roadway support construction. More specifically, the present invention relates to a design method of roadway bolt bolt and cable support in a corrosive mine environment. Background technique [0002] Most coal mines have a complex underground environment, with mine water gushing out, high temperature and high humidity, and perennial ventilation. Under the influence of mine water and oxygen-enriched ventilation in some coal mines, metal corrosion is easily caused. The types of mine water with strong corrosiveness are mainly high salinity mine water and acid mine water. [0003] At present, more than 70% of the roadways in my country's coal mines are supported by bolts and cables, of which more than 80% of the bolts are made of threaded steel, and the anchor cables are mainly high-strength and low-relaxation steel strands. The materials of bolts, cables and supporting accessories such as trays, steel bel...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G06F30/17G06F30/20E21D11/00G06F119/02
CPCG06F30/17G06F30/20E21D11/006G06F2119/02
Inventor 褚晓威鞠文君张镇吴志刚孟宪志李文洲冯友良石蒙李中伟
Owner CCTEG COAL MINING RES INST
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