Mainly develop the selection principle of the roadway along the ore body position

1. Principle: When arranging the wellbore along the strike, it should be considered that the total transport capacity of the ore is small and the transportation cost is the lowest.

2. Transportation work: The product of ore weight and transportation distance, expressed in tÂ·km. The position of the wellbore with the least transport capacity is at the midpoint of the equal amount of minerals on both sides. It has three situations:

(a) regular ore bodies; (b) irregular ore bodies; (c) irregularly dispersed ore bodies.

For regular ore bodies, if the flank is developed and the average distance is 1/2L, the transportation capacity is:

A side = Q Ã— 1/2L = 1/2QL (7 - 1)

If the central wing is used for development, the ore transport distance on the left side of the wellbore is L/2, and the transport distance from the average to the midpoint is L/2Ã—1/2=L/4; the transport distance on the right is the same as the left, ore ore. The total transportation function is:

A = (L / 4 Ã— Q / 2) left + (L / 4 Ã— Q / 2) right = 1/4 LQ (7 - 2)

Comparing (7-1) and (7-2), it can be proved that the well (ç¡) position deviates from the midpoint of the ore volume and the transportation work will increase. Therefore, the midpoint of the mine is the wellbore location with the least transport capacity.

The midpoint of the ore should meet the following requirements:

Q left = Q right (7-3)

For a single ore body, the ore body is regular in shape and equal in thickness, and the midpoint of the ore is one-half of the length of the ore body.

For irregular ore bodies, the ore bodies are divided into ore blocks, and the ore amount of each ore block is calculated separately, and the ore amount is projected onto the axis of the stage transportation lane. Then, starting from the two wings of the ore body, the ore amount of the ore block is added separately, and the midpoint of the ore amount can be obtained. The calculation method is as follows:

Q1+Q2+Q3+......=Q14+Q13+Q12+...... (7-4) Â

For multi-orbits and dispersed ore bodies, the intersection of the transport roadway and the main transport roadway of each ore body (or mine section) is the ore center of the ore body (or mine section), and then use (7-4) The method calculates the midpoint of the ore. As shown in the figure, the ore quantities of the three ore blocks of Q15, Q16 and Q17 are simultaneously moved to the point Q7, and then the midpoint of the ore body is calculated by the formula (7-4) to determine the position of the well (ç¡) along the strike direction.

PTA Powder

Main application:Repair and strengthen workpiece surface, significantly

Welding method:PTA welding

Main equipment:PTA welding machine

Flame core temperature: about 10000â„ƒ

Technological characteristics:PTA has high temperature, concentrated energy, stable combustion, small heat affected zone, fast welding speed, high production efficiency, easy to obtain low dilution rate of surfacing layer, surfacing layer and workpiece matrix are metallurgical bonding,, bonding strength is high.

Gpni0105b X100

PTA welding technology is one of surface strengthening methods, which has high deposition rate, low dilution rate, and could be applied with many kinds of powder. The manufacturing craft of PTA powder is normally gas atomization, which reduces satellite of powder. We supply 4 main categories of PTA powder: Nickel-based alloy powder, Iron-based alloy powder, Cobalt-based alloy powder and Mixed Powder.

Nickel Based Alloy Powder possesses high temperature resistance and wear resistance, it is the most popular alloy powder applied by PTA welding both domestically and internationally. Coating hardness is within the range of HRC 30-60. It could be applied to various industries like agriculture, plastic, paper, marine and steel making where wear and corrosion protection needed. Some examples are plunger, moulds, pump leaf and screw.

Iron Based Alloy Powder is more widely used and a more economic choice. With high abrasive resistance, it is more commonly applied to mining tools, drilling tools and mixers of iron and steel making industry, coal industry, shaft, oil and energy industry.

Cobalt Based Alloy Powder is recommended for corrosion and oxidation resistance, with better hot hardness values than equivalent Nickel based alloy powder. It is widely applied to steel making industry, coal industry and mining industry.

Mixed powder mainly refers to NiCrBSi mixing with other hard-phase powder such as cast tungsten carbide and other cemented alloy powder, which allows the powder better hardness around HRC60 and excellent abrasion resistance.

Mixed powder is more often used for mining equipment for oil sands, lignite, oil drilling tools, excavator buckets, extrusion screws for plastic processing, grain and oil processing, etc.

PTA Powder,Iron Based Alloy Powder,Cobalt Based Alloy Powder,Nickel Based Alloy Powder

Luoyang Golden Egret Geotools Co., Ltd , https://www.xtcwelding.com