Mine drainage corrosion-resistant steel mesh skeleton PE pipe

First, the pipe performance requirements for mine drainage scenarios

The mine drainage medium is mostly mixed with acid and alkali components and slag particles seeping out of the rock formation. At the same time, there are many uneven pressure and drop fluctuations in the underground laying area. Traditional cast iron pipes are prone to corrosion and rust, and the pressure-bearing capacity of ordinary PE pipes is insufficient. Leakage and blockage problems often occur in 3-5 years, which greatly increases the operation and maintenance cost. Therefore, mine drainage has high requirements for the corrosion resistance, wear resistance and pressure-bearing capacity of pipes.

Second, the core advantages of corrosion-resistant steel mesh skeleton PE pipes

This pipe is made of high-strength steel wire woven mesh as a reinforced skeleton, and the inner and outer layers are coated with corrosion-resistant PE raw materials. It takes into account the pressure-bearing performance of metal pipes and the corrosion resistance of plastic pipes. The pressure-bearing grade can cover all kinds of high and low lift drainage needs of mines. The tolerance to acid and alkali media is much higher than that of metal pipes. The inner wall has little smooth resistance and is not easy to accumulate slag. Its own weight is only 1/6 of that of cast iron pipes of the same specification, and the transportation and laying difficulty is lower.

III. Pipe selection points for mine drainage scenarios

When selecting a type, it is first necessary to match the pH value of the drainage water quality, match the pipe raw materials corresponding to the corrosion resistance grade, and then determine the pipe pressure level according to the laying depth and drainage head. At the same time, the pipe diameter is calculated in combination with the average daily displacement to avoid the pipe diameter being too small, resulting in insufficient drainage efficiency and excessive pipe diameter causing cost waste. In alpine areas, low-temperature modified raw materials should also be selected to reduce the risk of freezing cracking.

IV. Core considerations for on-site construction

Before laying, it is necessary to clean up the sharp stones and metal debris in the pipe trench to avoid scratching the outer wall of the pipe and causing pressure hazards. The hot-melt docking process is preferred for connection, and the heating temperature and cooling time are strictly controlled to ensure the sealing of the interface. When backfilling, fine sand should be used to layer compaction to avoid local uneven stress causing pipe deformation. Fixed piers should be installed in areas with a slope drop of more than 15 degrees to reduce the displacement risk caused by water flow impact.

Compared with traditional drainage pipes, the service life of corrosion-resistant steel mesh skeleton PE pipes can be increased by 2-3 times, and the operation and maintenance costs can be reduced by more than 40%. It has now become the mainstream material selection direction for various mine drainage systems.