Underground Budget Mine Support Tunneling Suspension Type Double Telescopic for Coal Mining Hydraulic Prop

• Certification: CE
• Standard: AISI, ASME, GB
• Surface Treatment: Polishing
• Manufacturing Process: Casting
• Material: Carbon Steel
• Core Components: Pump
• Model NO.: YBT
• Max Height mm: 650
• Rated Working Pressure MPa: 49
• Applicable Industries: Construction Works/Energy/Miming
• Rated Working: 250
• Transport Package: Steel Pallet or Customized
• Origin: China
• HS Code: 730890000
• Production Capacity: 10000 Sets/ Year

Product Description

Pillar transportation and storage
(1) When the pillar is transported, the pillar should be reduced to the minimum height;
(2) Use a special hydraulic prop transport vehicle, and it must be handled with care during installation and disassembly, and it is strictly forbidden to drop it;
(3) Pillars should be stored in a dry room not lower than 0ºC;
(4) For pillars that are not in use for a short period of time, the water (or emulsion) in the pillar cavity should be cleaned, the surface of the cylinder body should be
washed and dried, and the liquid inlet of the three-way valve should be blocked to prevent stolen goods from entering;
(5) The pillars stored in the groove on the working face should be erected and neatly arranged;
(6) The number of spare pillars in the well generally does not exceed 5% of the working face usage.
 

Category	Malfunction	cause of issue	Solution
Lifting column failure	The movable post does not protrude from the cylinder body or protrudes very slowly when supporting	No pressure or low pressure in the pumping station; The shut-off valve is closed; The injection valve nozzle is blocked by dirt; Clogged pipeline filter	Check the pumping station; Open the shut-off valve; Clean the injection valve nozzle; Clean the filter
Back column failure	Slow or no drop of the moving column	The return spring is dropped or damaged; The cylinder has a partial depression; Damage to the surface of the live post	Re-hang the return spring orreplace with a new spring; Replace damaged parts
Seal failure	1. Liquid leakage from the handle; 2. Liquid leakage from the base; 3. Liquid leakage from the φ42 hole on the column head; 4. Leakage from check valve or unloading port	The Y-ring is damaged, the oil cylinder is deformed or the coating falls off; The base φ100×3.1 O-ring is damaged; φ42×3.5 O-ring is damaged; Check valve, unloading valve is damaged	Replace the Y-ring, replace the cylinder; Replace the O-ring; Replace with new valve or clean one-way valve, unload valve pad

For mine support, a timber with a long fiber structure is always employed, such as spruce, fir, or other conifer wood, or eucalyptus. Timbers of these wood types shatter slowly when their loading capacity is exceeded and thus warn the miners through a definite creaking. Short-fibered timbers break without any prior, slowly-developing visible or audible indications. A dense, resinous, slow-growing wood type is always preferable for mine support purposes. For mining activities of longer duration, the timber should be cultivated by the mine operators themselves near the mine site.

Timber employed in moist or wet mines, especially for shaft construction in exhaust ventilation shafts or drifts in water-bearing strata, should be previously treated by a preservative. Timbers are impregnated by dipping them into special solutions, such as Roman-salt, copper sulphate, etc., either with or without pressure.

Timber support normally is not reuseable. The only exception is simple prop timbering for stoping which is sometimes recovered and the wood then reused for shorter props, head boards, breast timbers or wooden cribbing. In situations requiring excessive support, such as mining in incompetent rock, the cost off timbering becomes a significant factor in the economic analysis of the operation. Here the higher investment costs for friction prop support can result in a substantial savings In operation costs, since these support elements can be reused.

Timbering is the simplest roof support method in incompetent rock (e.g. in faulted zones) and contributes greatly to increasing mine safety. It is, however, disadvantageous for artificial mine ventilation in that it increases air resistance.
FAQ

Q1:What do you do?
A: We design and manufacture formwork and scaffolding products used for pouring concrete structures in the field of housing, multi-story structure, high-rise buildings, towers, sports stadiums, bridges, hydropower stations, industrial structures, etc.

Q2:What can you do for us?
A: We offer our suggestions, drawings of formwork layout, and quotations to the owners, design institutes, or contractors of the construction projects.
B: We sell our products to contractors, building companies, material suppliers, or trading companies.
C: We support our worldwide peer companies with our outstanding formwork or scaffolding products.
D: We provide remote or on-site instruction to the builders.

Q3:How long does it take to make a brief design and quotation after we offer the structural drawing?
A: In general, it takes 5~7 days based on specific requirements of the construction project.