(1) The definition of mining work – it refers to the mining of the roadway in the mine that has been developed. The stage is divided into ore blocks as independent recovery units. In the ore block, conditions such as pedestrian, rock drilling, ore-mining and ventilation are created.
(2) The task of picking work - it has two tasks. which is:
1 Dividing the ore nugget - the stage is subdivided into nuggets, and the operation is independent of the mining unit.

2 Create conditions – it creates conditions for the next step of mining (pedestrians, ventilation, rock drilling, mining, etc.).
(3) Means of approving work – refers to the development of a series of roadways. Picking lanes such as funnel necks, mines, pedestrians, ventilated patios, and liaisons.

(4) Acquisition coefficient and accuracy ratio

1) The purpose of using the acquisition coefficient and the accuracy ratio:

Due to the different conditions of the deposit and the mining method used, the type, number and location of the tunnels to be mined are different. And what is used to measure the size of the workload? To this end, it is usually expressed by two indicators: the acquisition coefficient and the acquisition weight.
2) Acquisition coefficient (K1)

K1 refers to the number of meters of the roadway that is required to be mined in each thousand tons of ore. That is K1= L/T × 1000 m / kg

Where: ΣL——refers to the length (meter) of the cutting lane in a mining block.

T——refers to the total amount of ore mined in one ore (ie total T) (tonnes)

T is the total amount of ore after depletion of ore loss has been considered, not the total weight of the ore. Now the design department has changed to use T to calculate K1).

3) Proportion of work (K2)

K2 refers to the ratio of the amount of ore mined in the excavation road to the total amount of ore mined in the excavation. K2=T'/T ×100%

T' in the formula - the amount of ore produced in the mining roadway (ton); T - the total amount of ore recovered in the ore (ton)

4) Comparison of K1 and K2

1 The acquisition factor K1 - it only reflects the length of the mining roadway, but does not reflect the section size (ie volume) of these roadways.

2 The proportion of work-acquisition K2—it reflects only the in-pulse mining lanes and cutting lanes, but does not reflect the working volume of the cutting lanes outside the veins.

Therefore, the use of K1 or K2 depends on the specific situation, sometimes expressed as one of them, sometimes K1, K2 are used at the same time, complement each other, so that it will reflect the mining workload of the ore.

5) K1 and K2 are important indicators for comparing the advantages and disadvantages of mining methods. However, for deposits with complex geological conditions, especially when the ore body is relatively small, the mining volume is relatively small, and the mining work must create for the mining work. good conditions. Therefore, it is impossible to mistakenly enter the calibration without analysis, and the smaller the workload, the better.

Metal Alloy Powder

Metal alloy powders are commonly used in thermal spray processes to coat surfaces with a protective or functional layer. These powders are typically made by combining different metal elements in specific compositions to achieve desired properties such as corrosion resistance, wear resistance, or thermal conductivity.

Some commonly used metal alloy powders for thermal spray include:

1. Nickel-based alloys: These alloys are known for their excellent corrosion resistance and high-temperature strength. They are often used in applications where resistance to oxidation and wear is required, such as in gas turbine components.

2. Cobalt-based alloys: Cobalt alloys are known for their high hardness and wear resistance. They are commonly used in applications where resistance to abrasive wear and high temperatures is required, such as in the aerospace and power generation industries.

3. Stainless steel alloys: Stainless steel alloys are used for their corrosion resistance and high-temperature strength. They are often used in applications where protection against corrosion and oxidation is required, such as in chemical processing equipment.

4. Titanium-based alloys: Titanium alloys are lightweight and have excellent corrosion resistance. They are commonly used in applications where a combination of high strength, low density, and corrosion resistance is required, such as in the aerospace industry.

These metal alloy powders can be applied using various thermal spray techniques, such as flame spraying, arc spraying, plasma spraying, or high-velocity oxygen fuel (HVOF) spraying. The specific choice of alloy powder and thermal spray process depends on the desired coating properties and the application requirements.

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