CUTTERHEAD OF SHAFT BORING MACHINE FOR HARD ROCK DESTRUCTION

Currently, the main method for excavating of vertical shafts is drilling and blasting method, which in some cases supplemented by the use of lightweight mechanized units suitable for the destruction of only weak rocks. The inability of sufficiently effective destruction of hard rocks prevents the increase in the level of mechanization of mining operations. This demands the search for technical solutions that expand the scope of the shaft boring machines to stronger rocks. In this regard, there is a need to study the options of changes in design of the cutterhead to ensure the possibility of destruction of hard rocks by shaft boring machines of a new type of SPKV. This study uses the method of calculating for the load capacity of radheader’s transmission from the industry standard OST 12.44.197-81 for the justification of the design parameters of shaft boring machine’s cutterhead. It also takes into account novel knowledge gained by research studies of Mining Institute named after A.A. Skochinsky and Tula State University. The study has shown that reducing of picks in the cutting line down to one along with shortening of the cutter spacing down to 18.5 mm expands the field of application of the shaft boring machine. Namely, the newly designed cutterhead allows destruction of rocks with the strength up to 10 units on the scale of M.M. Protodiakonov instead of conventional 3 units. This is due to the fact that a relatively small value of the cutter spacing should contribute to the optimal mode of destruction of the rocks.

Keywords

Сutterhead, verification calculation, layout pattern, rational application.

Issue number: 2
Year: 2019
ISBN: 622.236.22
UDK:
DOI: 10.25018/0236-1493-2019-02-0-105-113
Authors: Averin E. A., Naumov Yu. N., Smychnik A. D., Smychnik E. A.

About authors: Averin E.A. (1), Candidate of Technical Sciences, Engineer-Designer, e-mail: evgeniy.averin.90@mail.ru, Naumov Yu.N. (1), Candidate of Technical Sciences, Chief Designer, Smychnik A.D., Doctor of Technical Sciences, Professor, Technical Director, «Strictum» LLC, Russia, Smychnik E.A., Graduate Student, Saint Petersburg Mining University, 199106, Saint-Petersburg, Russia, 1) «Skuratovsky skilled and experimental plant» LLC, 300911, Tula, Russia.

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