What are the functions of hydraulic support hoses used in coal mines?

Hydraulic support hoses for coal mines are among the most critical components of comprehensive mining equipment. They are used to support the roof at the working face underground, ensuring the safety of both equipment and personnel. What is the structure of a hydraulic support? And what role does each hydraulic support hose in a coal mine play? Our editor will walk you through these questions below.

main beam

　　The roof beam of a hydraulic support is in direct contact with the roof, making it one of the primary load-bearing components of the support. Its main functions include:

　　1. Bear the load of the roof rock; 2. Bear the load of the roof rock; Hydraulic support hoses for coal mines

　　2. Repeatedly supporting the ceiling can cause it to shatter on a hard surface; 2.

　　3. Provide sufficient safety clearance for the mining face.

　　The structure of the top beam is typically classified into monolithic and split types, with the latter featuring a front beam attached to the front of the top beam. The support‑type top beam adopts a monolithic design, consisting of a box‑shaped structure welded from steel plates. Both the left and right sides are equipped with side guard plates, each topped by an additional protective panel; moreover, both the left and right side guard plates are hinged, enabling them to be opened or closed to enclose the space between frames.

　　The top beam of the support consists of four main reinforcing bars and a top web plate, forming a box‑shaped steel structure. The roof is relatively long, providing ample space for pedestrians. On the side of the top beam, there is a recess equal to one plate thickness, designed for mounting movable side guards. Both the jacks and spring sleeves that control these movable side guards are housed within the top beam, with sufficient installation clearance provided on its surface. The primary function of the top beam is to bear the compressive loads acting upon it and transmit these forces through the columns and base to the floor slab. Hydraulic hoses for coal‑mine hydraulic supports.

　　Cover beam

　　The upper part of the shield beam is hinged to the top beam, while its lower part is connected to the front and rear linkages; these linkages, in turn, are attached to the base. It serves as the primary connecting and shielding component of the support structure. Its main functions include:

　　1. Withstand the horizontal and lateral forces acting on the roof slab to ensure the support structure’s torsional resistance;

　　2. The cover beam, front and rear linkages, and base form a four-bar linkage, enabling the bracket to move in a prescribed manner.

　　3. Hydraulic support hoses for coal mines prevent coal from spilling into the roadway and maintain the working space.

　　Furthermore, due to the substantial bending and torsional moments it experiences and its harsh operating conditions, the shield beam must possess adequate strength and stiffness.

　　The shield’s support beam features an integral box‑section structure fabricated by welding steel plates. To ensure adequate strength, reinforcing plates are welded at the joints connecting it to the top beam and the front and rear linkages, and additional reinforcing plates are provided at the corresponding critical cross‑sections and welds.

　　The functions include:

　　1. It bears the horizontal component of the roof load and lateral forces, thereby enhancing the support structure’s torsional resistance.

　　2. The beam is concealed, and together with the front and rear linkages and the base, it forms a four-bar linkage mechanism to ensure that the beam’s travel distance remains limited; hydraulic hose for coal mine support frames.

　　3. Prevent coal‑front stacking in the tribe and maintain a clean workspace.

　　Furthermore, due to the substantial bending and torsional moments it experiences and its harsh operating conditions, the shield beam must possess adequate strength and stiffness.

　　Gangue baffle:

　　In steeply inclined coal seams, mechanized longwall mining is employed. Due to the large cutting angle, coal and rock fragments falling from the working face, propelled by impact forces and high velocities, pose a significant safety hazard to the next worker.

　　Therefore, a jack‑controlled barrier has been installed beneath the front beam of the hydraulic support to effectively isolate the landing operation area from the mining face, thereby better safeguarding personnel safety. Hydraulic hose for coal mine supports.