A Brief Discussion on the Daily Maintenance and Care of Hydraulic Support Hoses in Coal Mines

　　 Hydraulic support hoses for coal mines It is one of the critical components of fully mechanized coal mining equipment, serving to support the roof at the working face and ensure the safety of both equipment and personnel. To maintain the hydraulic support’s efficiency, routine maintenance is indispensable. So, what are the key considerations when repairing hydraulic hose assemblies used in coal mines?

　　Attach importance to Hydraulic support hoses for coal mines Daily maintenance and inspections.

　　Routine maintenance and disassembly‑inspection maintenance focus on the electro‑hydraulic system. Routine maintenance tasks are performed at intervals one, two, and three, with no gaps. “Frequent” maintenance is ongoing and continuous. “Both” means that all connectors, as well as hydraulic and electrical components, are complete and intact. “No three leaks” indicates that there are no leaks from valves, no leaks from strut sockets, and no leaks from pipelines. The principles governing hydraulic component repair include in‑well replacement and in‑well inspection, among others.

　　Before maintenance: Clarity and thorough preparation are essential. “Clarity” means that the scope of the maintenance tasks and their priorities must be clearly defined. Preparation involves two key aspects: gathering the necessary tools—especially specialized ones—and ensuring an adequate supply of spare parts. During maintenance, execution requires: understanding and verifying the root cause of the issue, conducting precise analysis, taking decisive action, and leaving no lingering problems. “Understanding and verification” entails identifying and confirming both the cause and the consequences of the fault. “Precise analysis” demands accurately pinpointing the faulty component and its underlying cause. “Decisive action” means addressing any identified defects promptly—replacing defective parts without delay and immediately inspecting wells or other areas requiring disassembly and examination when necessary. “Leaving no lingering issues” calls for a strong sense of responsibility and dedication, ensuring that every problem is resolved thoroughly so that the equipment returns to service in perfect working order.

　　1. If any connecting pins or axles are found to be missing, damaged, severely deformed, or absent, they shall be replaced or replenished immediately.

　　2. Inspect the hydraulic system for leaks and internal bypass flow; any leaking areas must be repaired or have their components replaced.

　　3. Check whether all moving parts operate smoothly and are free from jamming; if any issues are found, address them promptly.

　　4. Inspect all hoses for kinks, blockages, burial, or damage; address or replace them immediately if necessary.

　　5. Inspect the columns and front beams for any signs of automatic descent, identify the root cause, and address it promptly.

　　6. Inspect the columns and jacks; if any bending, deformation, or severe abrasion is detected, address it promptly. If such conditions compromise the tensile performance, the components must be replaced.

　　7. If the support mechanism operates slowly, identify the cause and promptly replace any clogged filters.

　　Please note Hydraulic support hoses for coal mines Weekly inspection.

　　1. Inspect the connecting pins and ear brackets of the top beam and front beam; if any cracks or damage are found, they should be replaced immediately.

　　2. Inspect the top beam and cap beam, as well as the welds between the cap beam and the front and rear connecting rods, for cracks, and replace any defective components promptly.

　　3. Inspect all load-bearing components for severe plastic deformation and localized damage. If any are found, replace them promptly.

　　4. Inspect the connecting screws of the valve components. If any are loose, tighten them promptly.

　　5. Inspect the securing bolts of the strut‑return rubber housing; if they are loose, tighten them promptly.

　　Precautions for the Maintenance and Management of Hydraulic Support Hoses in Coal Mines:

　　1. When disassembling and replacing components of hydraulic supports on the coal mining face, care must be taken to prevent roof fall, and appropriate measures should be implemented to ensure the safety of personnel and equipment. When replacing pillars, front beam sockets, various control valves, and other parts, the top beam should be temporarily supported by pillars.

　　2. Hydraulic components and piping systems of hydraulic supports used in coal mines must not be repaired or replaced under pressure; such operations shall only be performed after the system has been depressurized. During disassembly, care must be taken to prevent foreign matter from entering.

　　3. During the disassembly and maintenance of hydraulic supports in coal mines, appropriate tools must be used. In particular, care should be taken to protect the piston rod surfaces of various hydraulic cylinders, guide sleeves, valve components, sealing surfaces, couplings, and threaded connections from damage.