Rock breaking of conical cutter with assistance of front and rear water jet

Liu, Songyong; Liu, Zenghui; Cui, Xinxia; Jiang, Haifeng

doi:10.1016/j.tust.2014.02.002

Cited by 80 publications

(26 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dynamic process of single cutterdrills rock under different drilling depth was analyzed, cutting force curve was built [16]. A new model that was used to research the failure case of PDC bit was built according to real date [17].…”

Section: /13mentioning

confidence: 99%

Study of Load Fluctuation Characteristics of PDC Bit during Gas Extraction Borehole in Soft Coal Seam

Wang¹,

Han²,

Zhang³

2017

OALib

View full text Add to dashboard Cite

Load fluctuation characteristics have a great influence on drilling performance. So, study the influence of drilling kinematic parameters on the load fluctuation characteristics of PDC bit becomes more and more important. Gas drainage drilling experiment table was built and Gas drainage drilling experiment was carried out under different feed speed, different rotation speed and same drilling thickness with different feed speed and rotation speed. The results indicate that drilling torque decreases with the increase of rotation speed; vibration amplitude of drilling torque increases with increase of rotation speed. Vibration amplitude of feed resistance decreases from 90 r/min to about 240 r/min and then increases. The value of 240 r/min is minimum. Feed resistance and drilling torque increase with the increase of feeding speed. Vibration amplitude of drilling torque and feeding resistance increases with the increase of feeding speed. Feed resistance and drilling torque are almost equal with the same drilling thickness; meanwhile, vibration amplitude of drilling torque and feed resistance increases with the increase of feeding speed. It provides a good basis for setting the appropriate feeding speed and rotation speed in actual work. Subject AreasMechanical Engineering

show abstract

Section: /13mentioning

confidence: 99%

Study of Load Fluctuation Characteristics of PDC Bit during Gas Extraction Borehole in Soft Coal Seam

Wang¹,

Han²,

Zhang³

2017

OALib

View full text Add to dashboard Cite

show abstract

“…These studies are mainly focused on auxiliary cutting assistances, new design cutting heads, new type of cutting tools, water jets on cutting heads and control system addition to roadheaders [11][12][13][14][15][16][17].…”

Section: Roadheaders and Stability Situationsmentioning

confidence: 99%

Stability Analysis of Roadheaders

Ergun¹

2017

World Congress on Mechanical, Chemical, and Material Engineering

View full text Add to dashboard Cite

-Nowadays, tunnel and underground mining drivage excavation methods have become fully mechanized. Roadheaders are one of the widely used mechanical excavation machines. They have exceptional place in this area because of their low cost and flexibilty. However they have some disadvantages such as not being used in hard and unstable formations. Improvements of this ability can cause stability problems. Therefore evaluation of stability states of these machines in different cutting conditions is vitally important. Stability analysis methods should be used for design and selection of roadheaders and when applying new technologies on them.

show abstract

“…Lu et al [21] developed and studied a novel kind of the abrasive waterjet-assisted hard rock drilling technology, and the results show that when the drilling depth increased more than 63%, the thrust force and torque reduced over 15% and 20%, respectively. Liu et al [22,23] simulated the rock breakage by waterjet-assisted conical pick, and the results show that the rock fragmentation performance was better when the waterjet was placed through the pick center than that in front of the pick. Liu et al [24] investigated the effects of the waterjet-nozzle position and waterjet pressure on the cutting torque and thrust force of scaled cutting head with conical picks and found that the waterjet could significantly help in reducing the cutting torque and thrust force.…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on the Specific Energy Consumption of Rock Breakage Using Different Waterjet‐Assisted Cutting Heads

Jiang

Meng

2018

Advances in Materials Science and Engineering

Self Cite

View full text Add to dashboard Cite

To investigate the specific energy consumption (SE) of rock breakage by cutting heads assisted by different types of waterjet and to identify optimal waterjet parameters and assistance types, rock cutting with and without waterjets was carried on a rock fragmentation test bed. SE is a comprehensive evaluation index and was developed according to the applied load on cutting head, and the SE under different cutting conditions was compared and analyzed. e results show that the SE of rock breakage without waterjet assistance increased with the increasing of rock compressive strength (R CS ) but that the limited drilling depth decreased.e effect of the waterjet pressure on the SE of rock breakage by the cutting head I was marked, and SE decreased by 30∼40% when the ratio between R CS and waterjet pressure was less than 1. However, the function of the waterjet assistance was poor; therefore, a ratio of 1 could be used to distinguish the rock breakage effect of cutting head I. For cutting head II, the rock damage from the waterjet impact was limited due to the large waterjet standoff distance; thus the rock breakage performance of cutting head II was also limited. e waterjet impacting at the tip of the conical pick using cutting head III could enter into the cracks caused by the mechanical pick and fracture the rock. erefore, the rock breakage performance of cutting head III was better than that of cutting head II.

show abstract

Rock breaking of conical cutter with assistance of front and rear water jet

Cited by 80 publications

References 28 publications

Study of Load Fluctuation Characteristics of PDC Bit during Gas Extraction Borehole in Soft Coal Seam

Study of Load Fluctuation Characteristics of PDC Bit during Gas Extraction Borehole in Soft Coal Seam

Stability Analysis of Roadheaders

Experimental Research on the Specific Energy Consumption of Rock Breakage Using Different Waterjet‐Assisted Cutting Heads

Contact Info

Product

Resources

About