1. Coal Mining
1.1 Soft coal seam (Praeter hardness f≤3)
Performance requirements: Under these conditions, the coal seam is relatively hard, offering minimal resistance to rock breaking. However, the coal picks must possess high cutting efficiency. Because ineffective friction during cutting can easily lead to overheating, the coal picks must possess excellent heat dissipation. Furthermore, to ensure rapid penetration into the coal seam, the sharpness of the coal picks is crucial.
- Suitable picks: Ordinary picks are usually used . Their sharp head design can effectively reduce cutting resistance and increase excavation speed ;
1.2 Medium-hard coal seam (3<f≤6)
Performance requirements: Medium-hard coal seams place higher demands on the wear resistance of picks. As coal seam hardness increases, pick wear accelerates, shortening their lifespan and necessitating frequent replacement. Therefore, picks must feature surface wear reinforcement to withstand these highly abrasive formations.
- Adaptable Picks: Targeting medium-hard coal seams , these picks feature surface wear-resistant reinforcement. Through specialized materials and processes, wear resistance is increased by 2-3 times. Thermal spraying of a wear-resistant coating on the tooth surface significantly extends the service life in medium-hard coal seams.
1.3 Hard coal seams and coal seams with interbedded gangue (f>6 or containing interbedded gangue, uneven hardness and softness)
Performance requirements: The working conditions in this complex formation are among the harshest. The picks must not only withstand strong impact forces to prevent the alloy head from collapsing and the tooth body from breaking, but also deal with uneven wear caused by uneven force . Therefore, the picks must have high impact resistance and good anti-eccentric wear performance.
- Adaptable picks: The impact-resistant series of picks have significantly improved impact resistance by enlarging the alloy head and strengthening the tooth body through heat treatment . An alloy wear-resistant layer is added to the surface, greatly improving the wear resistance and service life of the product. At the same time, the self-spinning function is added to ensure uniform wear and extend the overall life.
2. Tunnel Excavation
2.1 Soft soil
Performance requirements: Soft soil requires relatively low pick hardness, but the picks must be adaptable and able to operate stably in various soil types. Furthermore, because soft soil may have high water content and unstable geology, the picks must also possess a certain degree of corrosion resistance and bending resistance.
- Adaptable pick: The tooth body is made of corrosion-resistant materials, and the tooth structure is optimized to enhance the bending resistance.
2.2 Rock Formation
- Performance Requirements: The high hardness of rock formations places extremely high demands on the pick's hardness and wear resistance. Furthermore, during tunneling, the pick must withstand significant torque and impact forces, making its strength and impact toughness crucial.
- Adaptable picks: For rock formations, picks with high hardness and high wear resistance are used . High-quality cemented carbide is selected as the cutter head material, combined with high-strength tooth steel. Advanced welding technology is used to ensure a firm bond between the alloy head and the tooth body.
In short, picks have distinct performance requirements in different application conditions. Only by accurately selecting picks based on specific working conditions can their full effectiveness be fully realized, improving operational efficiency and reducing costs. Luoyang Jinlu can provide customized designs based on customer needs. We feature ultra-coarse carbide cutter heads optimized for high cutting speeds, wear-resistant layers designed to match different working conditions and rock formations, and simulation analysis to continuously optimize product design to ensure a perfect balance between product life and efficiency.
As a global supplier of Coal picks, Luoyang Golden Egret Geotools co., Ltd. continues to invest in research and development and is committed to providing customers with high-reliability, low-energy consumption products. Besides that, we can also privide the Rock Drilling Tools, Coal Mining Tools, Construction Tools, Wear and Crushing Tools and Rotary Drilling Tools for the customers around the world.