The essence and evaluation of the combined tunneling method

            1. The essence of the joint tunneling method
            The essence of the combined roadheader tunneling method is to continuously carry out various processes such as mechanically breaking rock and exiting the boring machine to realize continuous tunneling. The continuity of the process is the biggest process feature of this method.

            2. Evaluation of joint tunneling machine

            a pros and cons
            (1) Advantages: Simplified excavation process, continuous operation, fast excavation speed; high degree of mechanization, labor saving, low labor intensity, no blasting, less damage to surrounding rock, high safety; smooth wall, no over-excavation, roadway The quality is good, the support is simple, the cut pieces are small and uniform, and the drainage is easy.
            (2) Disadvantages: Large and bulky body, high weight and high cost, complicated structure, long manufacturing period and auxiliary time; large power capacity, high power cost, long tool life, poor adaptability, and required radius of curvature of roadway Not suitable for variable rock formations.

            b Applicable conditions
            (1) The basic investment is large, and the required winding path is long, generally not less than 400m;
            (2) The geological conditions should be clear, mainly because it is suitable for the construction of roadways where the rock formation is relatively stable and not easy to fall;
            (3) Applicable to medium-hard rock formations. Hard rock formations are difficult to apply due to excessive tool costs;
            (4) Mainly used for straight roadway excavation with large radius of curvature;
            (5) The diameter of the excavation should not be too large. Although there are more than 10m models in foreign countries, the reasonable diameter in China is 3~5m.

    Tanker Vehicles include water tank truck, Fuel Tank Truck, LPG tanker & Semi-Trailer.

    Tanker trucks are mainly used for transporting liquid such as water, sewage water, drink water, oil, fuel, diesel , lpg, dangerous chemical(concentrated sulfuric acid, hydrochloric acid ) etc..

    Our tanker vehicles with stabilized performance, best quality ,cheap price, nice shape, durable and long service life.

    Tanker Vehicles

    Tanker Vehicles,Fuel Bowser Truck,Farm Tanker Vehicles,Oil Tanker Vehicles

    CHENGLI SPECIAL AUTOMOBILE CO.,LTD , https://www.clwcntruck.com

    Previous Post: Intelligent Transportation Development Trends and Progress
    Next Post: Difference between Ito generator and generator welder
    Home
    Recent Posts
    • Introduction of different categories of magnetic…
    • Innovative graphite beneficiation technology, ef…
    • Roadway support construction equipment and techn…
    • Inclined well bucket lifting
    • China's auto-preservation rate report in Sep…
    • How to improve the flotation concentrate grade?
    • The promotion of the high-end lubricants from th…
    • The correct way to add mineral processing chemic…
    • Hebei Chengde 4G explosion-proof * recorder bran…
    • In-situ PH recorder revives the land
    • Intelligent drivers can dance with the sun in th…
    • Intelligent Transportation Development Trends an…
    • The essence and evaluation of the combined tunne…
    • Difference between Ito generator and generator w…
    • Type test of 350MW turbine generator plant
    • Hunan has become one of the provinces with the m…
    • Application of sugar meter to measure fruit swee…
    • How to make moistureproof measures for substatio…
    • Mastering 5 skills at a glance
    • On the Importance of Economical and Practical Ut…