What Is a Metal Beam?

It is installed on the top of the single pillar, and the beam and the beam are hinged to each other to realize the load-bearing member for roof protection of the coal mining face.

It is installed on the top of the single pillar, and the beam and the beam are hinged to each other to realize the load-bearing member for roof protection of the coal mining face.

The metal hinged top beam is composed of a beam body, a joint, ears, pins, and an angle adjusting wedge. Pins and wedges are used to achieve articulation and cantilever support between beams. The bottom plate of the beam body has a lace groove, which is convenient for the pillar top cover to be stuck on the beam body at any position to prevent the pillar from slipping.

DJB type metal hinged roof beam belongs to medium roof beam. The beam body is made of 7 # steel butt welding. The cross-section height of the beam body is 70. This type of top beam is an articulated top beam. The metal hinged top beam can be combined with various types of individual metal pillars to form a metal bracket. . Since the metal hinged roof beam cantilever supports the roof plate above the conveyor lane in front of the coal wall of the working face, there is a large unsupported space between the coal wall and the pillar. Therefore, it provides conditions for the adoption of new coal mining machinery and flexible conveyors to achieve general mechanization of coal mining. It is a necessary supporting equipment for high-end general mining and new high-end mining technology. ^[1]

1. The beam body is welded from two concrete beams;

2. The left and right ears are respectively welded on the left and right sides of the end of the beam body. There are a wedge hole and a pin hole on the left and right ears. The wedge hole is located on one side of the pin hole, and a retaining ring is welded on the pin hole. Insert the pin hole through the retaining ring, the lower ends of the left and right ears are not protruding and are flat;

3. The joint is welded to the other end of the beam opposite the left and right ears. The joint has a wedge hole and a pin hole. The wedge hole is located on one side of the pin hole. The lower end of the joint is not protruding and is flat.

4. The left and right ear wedge holes and joint wedge holes are vertical flat round holes and closed mouth holes;

5. The left and right ear wedge holes and joint wedge holes are matched with the wedge. The wedge hole has a taper, and the taper of the wedge hole and the wedge is 18-16;

6. The horizontal centerline of the left and right ear wedge holes is not on the same line as the horizontal centerline of the joint wedge. ^[2]

   Metal long beam It can be combined with various types of monolithic pillars to form a metal support. The metal top beam is used by coal mines in horizontal and slow inclined inclined mining working faces and machine heads or other large roof control areas. The articulated metal roof beam can support the roof of the roof area with a long span cantilever, which can realize a large working space without pillar support on the working surface. It is beneficial to improve the working conditions and the use of new coal mining machinery and flexible conveyor cashier. condition.

   The metal hinged roof beam is the basic support for the single pillar working face. The commonly used length is 0.6 to 1.2m. It is mainly used for gently inclined coal seams and directly roofs unstable or medium stable coal mining faces. ^[3]