TY - JOUR
T1 - The influence of the structural distribution and hardness of mineral phases on the size and shape of rock drilling particles
AU - Yang, Xiaofeng
AU - Nie, Aiguo
AU - Elsworth, Derek
AU - Zhou, Jiaheng
N1 - Publisher Copyright:
© 2020, © 2020 Informa UK Limited, trading as Taylor & Francis Group.
PY - 2020/5/27
Y1 - 2020/5/27
N2 - Rock drilling is a significant activity widely used in the exploration of marine mineral resources and offshore civil engineering such as marine mining, petroleum and deep-water drilling. The characteristics of size and shape of particles produced during rock drilling influence drilling efficiency and energy consumption. We report a series of drilling experiments on sandstone, limestone and shale to systematically examine particle size distribution and shape and correlate these with original rock structure and composition. Correlations are established via metrics of particle size distribution, average circularity and specific surface area. Impact breakage and contact abrasion of individual particles during rock drilling are the main mechanisms controlling particle size and shape. Impact breakage is controlled by the structural distribution of mineral phases, while contact abrasion is principally related to the hardness of mineral phases. The particle size distribution is affected by the structural distribution of mineral phases. The average circularity of the drilling particles is mainly controlled by the hardness of mineral phases. The specific surface area of rock drilling particles is determined by both structural distribution and hardness of mineral phases–with homogeneous structure and low average hardness of the phases reducing the resulting specific surface area of the drilling products.
AB - Rock drilling is a significant activity widely used in the exploration of marine mineral resources and offshore civil engineering such as marine mining, petroleum and deep-water drilling. The characteristics of size and shape of particles produced during rock drilling influence drilling efficiency and energy consumption. We report a series of drilling experiments on sandstone, limestone and shale to systematically examine particle size distribution and shape and correlate these with original rock structure and composition. Correlations are established via metrics of particle size distribution, average circularity and specific surface area. Impact breakage and contact abrasion of individual particles during rock drilling are the main mechanisms controlling particle size and shape. Impact breakage is controlled by the structural distribution of mineral phases, while contact abrasion is principally related to the hardness of mineral phases. The particle size distribution is affected by the structural distribution of mineral phases. The average circularity of the drilling particles is mainly controlled by the hardness of mineral phases. The specific surface area of rock drilling particles is determined by both structural distribution and hardness of mineral phases–with homogeneous structure and low average hardness of the phases reducing the resulting specific surface area of the drilling products.
KW - Rock drilling particles
KW - characteristics of mineral phases
KW - circularity
KW - particle size distribution
KW - specific surface area
UR - http://www.scopus.com/inward/record.url?scp=85082481924&partnerID=8YFLogxK
U2 - 10.1080/1064119X.2020.1743398
DO - 10.1080/1064119X.2020.1743398
M3 - Article
AN - SCOPUS:85082481924
SN - 1064-119X
VL - 38
SP - 511
EP - 517
JO - Marine Georesources and Geotechnology
JF - Marine Georesources and Geotechnology
IS - 5
ER -