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<p>Blasting is a regular practice in the granite quarry located in Neriyamangalam, and residential areas as well as an EHT power line in the vicinity sometimes cause concern regarding the ground vibration generated during this process. In an attempt to assess the actual values, ground vibration during 10 routine blasting sessions was measured from a distance of 40&#xa0;m, progressing up to the residential areas beyond 700&#xa0;m. The maximum PPV recorded during these observation periods was 3.937&#xa0;mm/s, with a magnitude of either 0.51&#xa0;mm/s or less in the vicinity of residential areas. These readings fall well below the limits normally associated with structural effects. When the PPVs were compared with scaled distance, the data fitted a relationship of the form PPV = 52.4 (R/√W)<sup>−1·47</sup>, which suits the behaviour expected in compact granite. Most signals contained higher frequencies, indicating limited potential for resonance in buildings. Fly rock also stayed well within the quarry area, with the farthest piece found about 30&#xa0;m from the face. Based on the measurements collected, the blasting practice currently followed at the quarry remains comfortably within accepted safety margins for nearby structures.</p>

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Assessment of Ground Vibrations During Blasting Operations in a Granite Quarry—A Case Study

  • 期刊论文

  • 发表日期：

    2026年2月23日

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  • Raghuchandra Garimella,
  • Rama Sastry Vedala

摘要

Blasting is a regular practice in the granite quarry located in Neriyamangalam, and residential areas as well as an EHT power line in the vicinity sometimes cause concern regarding the ground vibration generated during this process. In an attempt to assess the actual values, ground vibration during 10 routine blasting sessions was measured from a distance of 40 m, progressing up to the residential areas beyond 700 m. The maximum PPV recorded during these observation periods was 3.937 mm/s, with a magnitude of either 0.51 mm/s or less in the vicinity of residential areas. These readings fall well below the limits normally associated with structural effects. When the PPVs were compared with scaled distance, the data fitted a relationship of the form PPV = 52.4 (R/√W)−1·47, which suits the behaviour expected in compact granite. Most signals contained higher frequencies, indicating limited potential for resonance in buildings. Fly rock also stayed well within the quarry area, with the farthest piece found about 30 m from the face. Based on the measurements collected, the blasting practice currently followed at the quarry remains comfortably within accepted safety margins for nearby structures.