The use of shallow hole ore mining method shall comply with the following provisions

1 The shallow hole retention method should be used for the steeply inclined thin veins and medium-thick ore bodies that do not adhere to the ore, do not self-ignite, and do not expand with water ;
2 The working face of the mining face should be arranged by the ladder section. When using the upward hole, the length of the working face of the step should be 10m~15m ; when the horizontal hole falls, the length of the step should be 2m~4m ;
3 When the distance between adjacent steeply inclined parallel thin veins is greater than 4m , the interlayer is stable, and the vein shape and geological structure are simple, mining can be carried out;
4 slanting adjacent parallel thin veins for mining, when the interlayer is stable, it can be mined or mined simultaneously. At the same time, the mining should be carried out intensively, and the upper stop should be advanced by two stratification heights. When the ore is discharged, the upper stop should be advanced or decreased at the same time. When the local stability of the interlayer is poor, the lower mining stop should be ahead of the two stratification heights of the upper mining stop. When the mining is carried out, the upper mining stop should be advanced or decreased at the same time.

Cobalt Alloy Powder

Cobalt-based alloy powders are commonly used in laser cladding processes due to their excellent wear resistance, high temperature strength, and corrosion resistance. These alloys typically contain varying amounts of cobalt, chromium, tungsten, and nickel, among other elements, to achieve specific properties.

The laser cladding process involves melting the cobalt-based alloy powder using a high-energy laser beam and depositing it onto a substrate to form a protective coating. This coating helps to enhance the surface properties of the substrate, such as hardness, wear resistance, and corrosion resistance.

Some common cobalt-based alloy powders used in laser cladding include:

1. Stellite: This is a well-known cobalt-chromium-tungsten alloy that offers excellent wear and corrosion resistance. It is often used in applications where high temperatures and abrasive environments are present, such as in oil and gas drilling tools, valves, and pump components.

2. Tribaloy: Tribaloy alloys are cobalt-based alloys that contain varying amounts of chromium, molybdenum, and silicon. They are known for their exceptional high-temperature strength and resistance to galling, making them suitable for applications in the aerospace, petrochemical, and power generation industries.

3. Haynes alloys: Haynes alloys are nickel-cobalt-chromium-molybdenum alloys that offer excellent high-temperature strength, oxidation resistance, and corrosion resistance. They are commonly used in applications where extreme heat and corrosive environments are present, such as in gas turbines and chemical processing equipment.

These cobalt-based alloy powders are available in various particle sizes and can be tailored to meet specific application requirements. They can be used with different laser cladding techniques, such as powder-fed laser cladding or blown powder laser cladding, depending on the desired coating thickness and properties.

Overall, cobalt-based alloy powders for laser cladding provide enhanced surface properties and improved performa

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