As a new type of mine and tunnel support material, W steel belt shield has many advantages, but it also has some disadvantages or limitations. Here is a detailed analysis of their shortcomings or limitations:
一,Limitations of thickness and carrying capacity
W steel belt guard plate is usually made of thin steel plate, its thickness is generally between 3-5mm. Although this design makes the W steel strip plate have a certain flexibility and deformation ability, but in the face of extreme or high pressure geological conditions, its bearing capacity may be limited. When the roadway pressure or formation pressure exceeds its bearing capacity, the W steel belt guard plate may be pressed into or through the steel belt, resulting in shear and tear damage of the steel belt.
二,The complexity of installation and maintenance
The installation of the W steel belt guard requires professional technical and equipment support to ensure that it can be correctly and firmly fixed on the supporting structure. At the same time, during the use of the supporting structure, it is also necessary to regularly check and maintain the W steel belt protection plate to ensure the stability and reliability of its performance. This complexity of installation and maintenance can increase the cost and difficulty of the project.
三,Adaptability to geological conditions
Although W steel belt shield can play a good supporting role in a variety of geological conditions, its adaptability may be limited in some special geological conditions. For example, in complex geological conditions such as extremely soft rock, extremely broken rock or high stress areas, W-steel strip guard may not be able to provide sufficient support strength alone, and needs to be combined with other support materials or methods.
四,Environmental impact and durability
Although the W steel strip protector is specially treated to improve its durability and corrosion resistance, its performance may gradually decrease after long-term exposure to harsh natural environments (such as moisture, acid and alkali corrosion, etc.). In addition, if the W steel strip guard is subjected to serious physical impact or wear, it may also lead to premature failure.
五,Cost consideration
Compared with traditional support materials, the production and installation cost of W steel belt guard may be higher. This may increase the total investment of the project, and for some projects with limited budgets, it may be a consideration in the choice of W steel belt guard.
To sum up, W steel belt shield plays an important role in mine and tunnel support, but there are some shortcomings or limitations. In practical application, it is necessary to choose the appropriate supporting materials and schemes according to the geological conditions, supporting requirements and economic conditions of specific projects.
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