Modern people's lives cannot do without energy. Coal mines, as a common energy source, are widely used. In China, there are tens of thousands of coal mines of various sizes. Due to various reasons, water leakage accidents occur in mining areas. If not dealt with in a timely manner, it will endanger the safety of absenteeism. Once a water leakage accident occurs, the water trapped in the absenteeism area must be quickly drained. However, mines have very strict requirements for pipelines, which not only ensure sufficient pressure and flow, but also have flame-retardant and anti-static properties. The mine is very deep, with a large vertical height and the presence of tiles underground, so the selection of pipelines cannot be careless. Flat coiled polyurethane hose is a high-pressure, wear-resistant, flame-retardant and anti-static polyurethane hose, which has high pressure resistance, wear resistance, and anti-static properties. Excellent electrostatic performance, meeting the rescue requirements in underground mines, Due to the use of flexible hoses and quick disconnect fittings, pipeline laying can be completed in a short period of time. Therefore, many domestic mining rescue teams currently choose to use these types of hoses as emergency rescue supplies.
 
1、 Hose selection
The selection of hoses is very important. Firstly, it is necessary to meet the requirements of the rescue team. Generally, the rescue team is responsible for multiple mining areas at the same time, and the environment of each mining area is not the same. Therefore, it is best to purchase hoses that can meet the requirements of all mining areas at the same time. The choice of hose model should be determined based on the vertical depth and distance data of the mines in the area under its jurisdiction
Generally, there are 4-inch, 6-inch, and 8-inch hoses that can be used in mining areas. If the diameter is too small, the flow rate cannot be achieved. If the diameter is too large and the pump volume is too large, the installation difficulty will increase. Therefore, when choosing hoses and pumps, it is necessary to consider their actual needs comprehensively.
2、 Accessories selection

When using polyurethane hoses for mine rescue, each hose needs to be connected with a hose interface, while also considering the quick and safe installation of the interface. Currently, there are two main interfaces on the market: German self-locking interface (also known as internal buckle interface) and multi tooth plug-in interface. The former is suitable for 4-inch and 6-inch hoses, while the latter is suitable for 8-inch hoses, both of which are easy to install. In addition, accessories that may also be used include flange interfaces (used to connect hoses and water pump outlets), adapters (used to connect hoses of different diameters), check valves (to prevent water backflow from damaging the water pump), elbows (accessories for hose turning), crescent wrenches (interface installation and removal tools), wallpaper knives, and other accessories.

3、 Delivery Time
The procurement of mine rescue hoses can be divided into two categories. One is preventive reserve, which does not require a high delivery time and can basically wait for the hose to be produced normally without any problems. The other is immediate procurement, which requires sellers to have sufficient inventory and be able to ship at any time. In fact, as purchasers of mine rescue teams, in addition to stocking up on their own, they should communicate with relevant manufacturers in a timely manner so that they can quickly obtain goods when needed.
4、 Inspection report
When purchasing, it is necessary to pay attention to requesting the relevant product testing report from the manufacturer. Generally, in the industry, the explosion pressure inspection report issued by Chongqing Coal Science Institute is very authoritative. If the manufacturer cannot provide the corresponding inspection report, it is necessary to carefully identify and avoid being deceived when purchasing.
5、 Storage and maintenance of hoses
The service life of polyurethane hoses is very long. Before being put into use, they can generally maintain their rated pressure performance unchanged for the first two years. After two years of use, their performance will gradually decrease with time (due to a decrease in burst pressure). In frequent use, this time will be shortened, and performance decline usually occurs after one year. Of course, proper maintenance and storage can increase the service life of the hose, such as avoiding prolonged exposure to sunlight, avoiding excessive pressure, avoiding hard pulling and dragging, and promptly winding and cleaning surface stains after use.