The mine roof support is mainly used for mine roadway, secondary support of mine roadway, and support support of mountain tunnel. The use of U-shaped mine roof supports effectively reduces the occurrence of accidents such as roofing and sheeting, is safe and reliable, and improves the stability of the mine ventilation system. The U-shaped mine roof supports is used to solve the problem of tunneling support. U-type mine roof supports have the advantages of high supporting force, large supporting strength, easy installation and no deformation. Therefore, they are often used to manufacture roadway shrinkable metal brackets, which are used for mine roadway, secondary support of mine roadway, and support of mountain tunnel. Support and other purposes. The use of U-shaped mine roof supports effectively reduces the occurrence of accidents such as roofing and sheeting, is safe and reliable, and improves the stability of the mine ventilation system. The U-shaped mine roof supports is used to solve the problem of tunneling support.
U-shaped mine roof supports; top beam and leg joints between the frame and the tie bar backing data column legs have three forms, one is the upper part of the arc shape, the lower part is the straight line segment; the second is all curved, and only one The radius of curvature; the third is all curved, but with two radii of curvature. The base of the column is welded with a base. The size of the base depends on the hardness of the bottom plate. The connecting piece is a clamping device between the bracket and the joint, which can be used for the connection between the joints, and can also press the two steel joints of the joint. The pre-tightening force is provided to make the friction between the U-shaped steels, thereby ensuring that the arched bracket has a certain working resistance and a certain amount of contraction. The role of the inter-rack tie rod is to enhance the overall relative stability of the bracket, and the brackets are coupled from the longitudinal direction to form a whole.
U-shaped mine roof supports features: U-type mine roof support is subjected to large pressure, long support time, easy to install and not easy to deform. U-type mine roof supports have shrinkage, stable and reliable bearing capacity compared with other rigid supports, and adapt to the load and deformation of soft surrounding rock. The U-shaped mine roof supports has high cross-section utilization rate, high recycling and reuse rate, small maintenance, and reduced use of pit wood. The environmental protection benefits are very obvious.
U-shaped mine roof supports preparation before construction: U-shaped steel bracket is a steel with a cross-sectional shape like the English letter "U". U-shaped steels produced by different countries have different cross-sectional shapes, geometric parameters and materials. Currently, U-shaped steel models mainly include U18, U25, U29, U36 and so on.
