A cluster hammer, also known as a multiple hammer or cluster drill, consists of several individual hammers arranged in a cluster. Each hammer in the cluster operates independently but within the same drilling assembly. This configuration allows for efficient and effective drilling in hard rock formations by distributing the impact force across multiple hammer heads.
Here are some key features and benefits of a cluster hammer in DTH drilling:
Increased drilling efficiency: The use of multiple hammers in a cluster allows for faster penetration rates in hard rock compared to single hammers. The combined impact forces of the hammers result in improved drilling speed.
Reduced energy consumption: Despite the increased drilling efficiency, cluster hammers typically require less energy per meter drilled compared to larger single hammers. This can lead to cost savings in terms of fuel or power consumption.
Improved hole straightness: The cluster hammer design helps maintain better hole straightness during drilling. The distribution of impact forces across multiple hammers reduces the tendency for the drill bit to deviate or deflect off course.
Versatility: Cluster hammers can be used in various rock formations, including hard and abrasive formations. They are suitable for applications such as mining, quarrying, foundation drilling, and geotechnical exploration.
Easy maintenance: Cluster hammers are typically designed for easy maintenance. Individual hammer heads can be replaced or serviced separately, which simplifies maintenance and reduces downtime.