The importance of goaf processing

After returning to the mining house by the open field mining method, a large number of goafs are left and must be disposed of in a timely manner. With the mining of the ore and the formation of the empty area, the original stress state of the rock mass is destroyed, the stress is redistributed, the stress is concentrated in some parts, and the stress is reduced in other parts. With the deepening of the mining work or the mining of the remaining mines, the volume of the empty area continues to expand. If the concentrated stress exceeds the ultimate strength of the ore or surrounding rock, the surrounding rock will have cracks, and the deformation of the roof, roof and roadway will occur; in severe cases, the pillar will be crushed, the mine will collapse, the roadway will be destroyed, and the rock will move as a whole. The roof is large and large, and the ground is not cracked, sinking and collapsing, that is, large-scale ground activity occurs. When the top plate falls down in a large area, a destructive mechanical punch that also produces a strong crack is an impact. The lighter affected is only the individual stope or stage, and the heavy ones have caused the entire mine to be stopped.

TUBING COUPLING

Couplings are used to connect two joints of TUBING coupling or CASING pipe together.

Couplings are short length of heavy wall pipe with the same threads on each end.
EASTSUN manufactures tubing coupling and casing tubing coupling strictly comply with API 5CT latest standard.


The steel coupling is mainly used to connect oil pipes in pil drilling.

This product can be used to connect the shafts of units that are

manufactured separately.

It can fit the misalignment of the shafts or introduce mechanical flexibility.

The pipe coupling is capable of reducing the transmission of shock losds from one shaft to another.

It can also introduce protecyion against overloads.

The steel coupling can be used to alter vibration characteristics of

rotating units.

Pipe coupling is also used to connect drilling par and driven part.

Size
 Grade
 NUE
 EUE
 Special clearance
2 3/8"
 J55/K55/M80/L80/P110
 Yes Yes
 Yes
2 7/8"
 J55/K55/M80/L80/P110
 Yes
 Yes
 Yes
3 1/2"
 J55/K55/M80/L80/P110
 Yes Yes
 Yes
4"
 J55/K55/M80/L80/P110
 Yes
 Yes
4 1/2"
 J55/K55/M80/L80/P110
 Yes
 Yes


Tubing Coupling,Api Coupling,Eue Coupling,Api Line Couplings

ESASTSUN OILFIELD EQUIPMENT MANUFACTURING (CAMBODIA) CO., LTD , https://www.eastsuncambodia.com