scholarly journals Examining of rock drilling properties in underground metal mine excavation

2021 ◽  
Vol 93 (1) ◽  
Author(s):  
MUSTAFA EMRE YETKİN
Keyword(s):  
Rock Drilling ◽  
Metal Mine ◽  
Mine Excavation

Dynamic Stability of an Impact System Connected With Rock Drilling

1969 ◽  
Vol 36 (4) ◽  
pp. 743-749 ◽  
Author(s):  
C. C. Fu
Keyword(s):  
Computer Simulation ◽  
Exact Solution ◽  
Steady State ◽  
Asymptotic Stability ◽  
Piecewise Linear ◽  
Steady State Solution ◽  
External Excitation ◽  
Rock Drilling ◽  
Impact System ◽  
Number Of Cycles

This paper deals with asymptotic stability of an analytically derived, synchronous as well as nonsynchronous, steady-state solution of an impact system which exhibits piecewise linear characteristics connected with rock drilling. The exact solution, which assumes one impact for a given number of cycles of the external excitation, is derived, its asymptotic stability is examined, and ranges of parameters are determined for which asymptotic stability is assured. The theoretically predicted stability or instability is verified by a digital computer simulation.

Full-Scale Experiments on Jets in Impermeable Rock Drilling

1964 ◽  
Vol 16 (03) ◽  
pp. 329-336 ◽  
Author(s):  
R. Feenstra ◽  
J.J.M. Van Leeuwen
Keyword(s):  
Full Scale ◽  
Rock Drilling

Electrosintering Production of Novel Grade Diamond Composites

2010 ◽  
Vol 660-661 ◽  
pp. 854-859 ◽  
Author(s):  
Guerold Sergueevitch Bobrovinitchii ◽  
Sérgio Neves Monteiro ◽  
Rômulo Crespo Tardim
Keyword(s):  
High Pressure ◽  
Sintering Temperature ◽  
Rock Drilling ◽  
Heating Pulse ◽  
Strength Evaluation ◽  
Reactive Cell ◽  
Sintered Diamond ◽  
Temperature Exposure ◽  
Short Heating

This paper presents the results on the strength evaluation of sintered diamond-based composites with Co binder. The method of intensive electrosintering with a short heating pulse was applied by a high pressure of 0.5 GPa and a time of 2-40 s. Composites with different compositions and for different purposes, such as rock drilling and dressing tools, were investigated. The reactive cell was design with the purpose of preserving the diamond properties from the detrimental sintering temperature exposure. The results of this electrosintering technology permitted to obtain improved composites to be used in tools with higher indexes of performance and productivity.

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