Field Case Study: Diamond Coal Mining Pick

8–10× Longer Service Life | Nearly 30% Cost Savings | 20% Higher Cutting Efficiency

Structure Reference: J70/69/132/35-40MF diamond pick design reference	After Field Use: On-site working condition on a coal shearer in mixed coal, mudstone, and sandstone formations

1.Working Conditions & Key Data

2.Field Performance

• • Longer service life: The diamond coal picks delivered approximately 8–10 times the service life of conventional carbide picks.
  • Lower operating cost: Field trials indicated nearly 30% overall cost savings.
  • Higher cutting efficiency: Under the same geological conditions, cutting efficiency improved by about 20%.
  • Continuous operation: From Dec. 11, 2019 to Mar. 10, 2020, the working face advanced 139.6 m while consuming 32 diamond picks.
  • More stable machine operation: The shearer ran more smoothly with lower vibration, helping improve operational safety.

3.Product Advantages

• Diamond wear-resistant cutting tip: Built for coal seams, mudstone, and medium-grained sandstone mixed formations.
• Stable cutting in harder interlayers: Maintains reliable cutting performance in f=5–8 sandstone containing quartz and calcareous cementation.
• Reduced replacement frequency: Longer pick life helps reduce downtime caused by frequent pick changes.
• Lower abnormal wear risk: Regularly checking free rotation helps avoid eccentric wear caused by hardened coal ash and debris in the pick holder.

4.Summary

Under MG900/2360-WD shearer operation, dual 2×900 kW cutting motors, and water cooling, the J70/69/132/35-40MF diamond pick demonstrated strong durability, cost efficiency, and cutting stability in coal, mudstone, and medium-grained sandstone formations. Compared with traditional carbide picks, it achieved about 8–10× longer service life, nearly 30% cost savings, and around 20% higher cutting efficiency, making it a reliable choice for improving shearer productivity and operational safety.