A Study of Specific Fracture Energy at Percussion Drilling

18th International Scientific Symposium in Honour of Academician M. A. Usov: Problems of Geology and Subsurface Development

Shadrina, A.^1 ; Kabanova, T.^2 ; Krets, V.^1 ; Saruev, L.^1

Tomsk Polytechnic University, Tomsk, Russia^1

Tomsk State University, Tomsk, Russia^2

关键词: Drilling process;    Dummy variables;    Hammer parameters;    Multiple regression analysis;    Non-parametric test;    Percussion drilling;    Qualitative analysis;    Statistical approach;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/21/1/012036/pdf
DOI  :  10.1088/1755-1315/21/1/012036

来源: IOP

【 摘 要 】

The paper presents experimental studies of rock failure provided by percussion drilling. Quantification and qualitative analysis were carried out to estimate critical values of rock failure depending on the hammer pre-impact velocity, types of drill bits and cylindrical hammer parameters (weight, length, diameter), and turn angle of a drill bit. Obtained data in this work were compared with obtained results by other researchers. The particle-size distribution in granite-cutting sludge was analyzed in this paper. Statistical approach (Spearmen's rank-order correlation, multiple regression analysis with dummy variables, Kruskal-Wallis nonparametric test) was used to analyze the drilling process. Experimental data will be useful for specialists engaged in simulation and illustration of rock failure.