皇冠免费开户

  • <tr id='7kS46g'><strong id='7kS46g'></strong><small id='7kS46g'></small><button id='7kS46g'></button><li id='7kS46g'><noscript id='7kS46g'><big id='7kS46g'></big><dt id='7kS46g'></dt></noscript></li></tr><ol id='7kS46g'><option id='7kS46g'><table id='7kS46g'><blockquote id='7kS46g'><tbody id='7kS46g'></tbody></blockquote></table></option></ol><u id='7kS46g'></u><kbd id='7kS46g'><kbd id='7kS46g'></kbd></kbd>

    <code id='7kS46g'><strong id='7kS46g'></strong></code>

    <fieldset id='7kS46g'></fieldset>
          <span id='7kS46g'></span>

              <ins id='7kS46g'></ins>
              <acronym id='7kS46g'><em id='7kS46g'></em><td id='7kS46g'><div id='7kS46g'></div></td></acronym><address id='7kS46g'><big id='7kS46g'><big id='7kS46g'></big><legend id='7kS46g'></legend></big></address>

              <i id='7kS46g'><div id='7kS46g'><ins id='7kS46g'></ins></div></i>
              <i id='7kS46g'></i>
            1. <dl id='7kS46g'></dl>
              1. <blockquote id='7kS46g'><q id='7kS46g'><noscript id='7kS46g'></noscript><dt id='7kS46g'></dt></q></blockquote><noframes id='7kS46g'><i id='7kS46g'></i>
                home > PRODUCTS > Powered Roof Support

                Powered Roof Support

                cbce5adff3cb4fb2a4cc618bb5cc88f0.jpg

                ZMJ is recognized as the largest powered roof support manufacturer in the world with over 50 years of experience. The company has an annual capacity of producing 30,000 units of powered roof supports used in thin seam, medium seam, thick seam and Longwall Top Coal Caving (LTCC). These powered roof supports are custom designed to meet the exact requirements from the coal mines.  

                ● Working resistance ranging from 160 tonnes to 2,600 tonnes.    
                ● Center distance of 1.25,1.5, 1.75, 2.05 and 2.4 meters    
                ● Heights ranging from 0.55 to 8.8 meters    
                ● Leg bore ranging from 140 to 600 mm    
                ● Fatigue up to 80,000 cycles  


                2e44017415dd477d8c351a25d0f8e6ea.JPG    dcea5d4c459a4009a785a89c716c144a.png

                ZMJ has the state-of-the-art design methods, including:

                ● Finite element analysis (FEA) Optimization tools & analysis    
                ● Pro Engineer Design Tools    
                ● 3D Design of PRS hydraulic hose system    
                ● Parameterized Design    
                ● Software for indicative calculation of support capacity   

                Based on the precondition to satisfy the requirement of customers, ZMJ advocates the design ideas of optimization, refinement and humanization, with the product design based on adequate understanding  of the geological conditions of the coal mine. With special-purpose CAD design and analysis system, it conducts 3D charting, finite-element analysis, dynamic analysis, motion simulation and structural optimization through computer.  

                The company has its own design & research institute to guarantee the product quality with a Trinitarian system covering research and development  , product design and manufacturing.