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Under hard rock conditions, the selection of picks is crucial!
In mining, tunneling and other engineering fields, picks are the core tools for hard rock crushing, and their selection is directly related to operating efficiency and equipment life. Faced with high hardness, complex and changeable working conditions, how to scientifically select picks has become the key to improving engineering benefits. This article will analyze the key points of pick selection under hard rock conditions from three dimensions: material, structure, and maintenance.
Mar 25th,2025
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Under hard rock conditions, the selection of picks is crucial!
In mining, tunneling and other engineering fields, picks are the core tools for hard rock crushing, and their selection is directly related to operating efficiency and equipment life. Faced with high hardness, complex and changeable working conditions, how to scientifically select picks has become the key to improving engineering benefits. This article will analyze the key points of pick selection under hard rock conditions from three dimensions: material, structure, and maintenance.
1. Material selection: the golden ratio of cemented carbide
Hard rock crushing requires picks to take into account both wear resistance and impact resistance, and cemented carbide cutter heads have become the mainstream choice. Tungsten-cobalt cemented carbide is widely used due to its excellent performance. Yikuang drill high-quality tungsten-cobalt alloy hardness can reach HRA90 or above, while maintaining toughness. Comparative tests at a granite quarry show that cemented carbide picks have a lifespan several times longer than ordinary steel.
2. Structural changes: the wisdom of using a little effort
The geometry of the pick determines the efficiency of rock crushing. Yikuang drill has developed alloy composite coated picks for hard rock. The design of a ring belt clad on the tooth head reduces contact stress and forms a "point breaking surface" effect. In basalt tunnel excavation, this structure reduces the specific energy consumption of cutting by 25% and the amount of dust generated by 30%.
3. Arrangement method: cannot be ignored
The arrangement of picks has hidden secrets. The spiral arrangement can disperse the load to a large extent, form a continuous crushing zone in hard rock cutting, and provide better stability.
With the advancement of materials science and manufacturing technology, innovative technologies such as new materials and nano-coatings will be applied to pick manufacturing. Engineering practice shows that in extremely hard rock formations such as basalt and quartzite, the service life of picks with alloy composite coatings is greatly improved. At the same time, it is recommended that construction units establish a working condition database and formulate personalized selection plans based on specific rock formation parameters (Mohs hardness, quartz content, etc.) to achieve precise matching and cost optimization.
