Scholarlink

<p>Drill bit wear significantly affects the efficiency and energy consumption of rock drilling operations, particularly in limestone mining where the abrasive nature of the rock reduces bit life and penetration rates. Many laboratory studies have characterized wear mechanism of drill bit in drilling, and there is very limited research carried out on field. This study investigates the wear characteristics of a 165&#xa0;mm Sandvik DTH drill bit used in a C600H drill machine (make of Revathi Equipment Limited, REL) during field operations in a limestone mine. The formation primarily comprises of massive and bedded limestone with uniaxial compressive strength (UCS) of 55–60&#xa0;MPa. A total of 700 holes, each 6–8 m deep, were drilled, totaling 5000 m. Drill bit wear was quantified using bit mass loss measurements at 500 m intervals. Operational parameters during the study maintained at an air pressure of 1.241 MPa, rotation pressure &amp; pull-down pressure of 3.447 MPa and a rotational speed of 49–51 RPM. Penetration rate was monitored for each hole throughout the study of 700 holes. Results demonstrated a clear correlation between bit wear and rate of penetration. As the bit underwent greater mass loss of 490 g, a noticeable reduction in penetration rate from 21.85 m/h to 20.18 m/h (7.60%) was observed after 5000 m. Concurrent sieve analysis of drill cuttings revealed a decrease in average particle size, indicating reduced cutting efficiency of the drill bit. These findings enhance understanding of field-scale bit wear behavior and provide insights into optimizing bit replacement intervals for improving drilling efficiency in limestone mining. </p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Innovation in Practice: Correlating Bit Wear with Drilling Performance to Enhance Productivity-Field Assessment

  • 期刊论文

  • 发表日期：

    2026年5月9日

查看全文
  • K.V Subrahmanyam Sarma,
  • Harsha Vardhan,
  • ChivukulaMurth Suryanarayana Murthy,
  • Appani Ravikumar

摘要

Drill bit wear significantly affects the efficiency and energy consumption of rock drilling operations, particularly in limestone mining where the abrasive nature of the rock reduces bit life and penetration rates. Many laboratory studies have characterized wear mechanism of drill bit in drilling, and there is very limited research carried out on field. This study investigates the wear characteristics of a 165 mm Sandvik DTH drill bit used in a C600H drill machine (make of Revathi Equipment Limited, REL) during field operations in a limestone mine. The formation primarily comprises of massive and bedded limestone with uniaxial compressive strength (UCS) of 55–60 MPa. A total of 700 holes, each 6–8 m deep, were drilled, totaling 5000 m. Drill bit wear was quantified using bit mass loss measurements at 500 m intervals. Operational parameters during the study maintained at an air pressure of 1.241 MPa, rotation pressure & pull-down pressure of 3.447 MPa and a rotational speed of 49–51 RPM. Penetration rate was monitored for each hole throughout the study of 700 holes. Results demonstrated a clear correlation between bit wear and rate of penetration. As the bit underwent greater mass loss of 490 g, a noticeable reduction in penetration rate from 21.85 m/h to 20.18 m/h (7.60%) was observed after 5000 m. Concurrent sieve analysis of drill cuttings revealed a decrease in average particle size, indicating reduced cutting efficiency of the drill bit. These findings enhance understanding of field-scale bit wear behavior and provide insights into optimizing bit replacement intervals for improving drilling efficiency in limestone mining.