Test data of electromagnetic hammer for nonexplosive rock fracturing

The article presents the data of the benchmark and proving-ground testing of a pilot electromagnetic hammer with coupled electromagnetic motors. The electromagnetic hammer (EMH) is designed as an average size hammer meant for blow energy to 6000 J and manufactured at the Kirov Engineering Plant (Almaty, Kazakhstan) under an innovation grant of the National Agency for Technological Development (2016–2019). The tests of EMH were performed on an experimental bench equipped by hydraulic hoister and on a proving ground as attached implements of wheel-type shovel HYUNDAI 210. The dependences of the pull on the ferromagnetic armature travel and current in the inductance coils of electromagnetic motors are obtained. It is found that the unit blow energy is almost linearly related with the current, which enables adjustment of the blow energy in operation. The design features of the electromagnetic motors enable cooling of the inductance coils with both liquid and gaseous refrigerants, which allows EMH to be operated in various climatic conditions. The tests of EMH as attached implements of the wheeled shovel demonstrated functional capabilities of the hammer and its workability with a base machine. From the comparison of engineering data, by some parameters, the electromagnetic hammer can compete over the hydraulic hammers.

Keywords: mining practice, non-explosive fracturing, percussive machines, electromagnetic hammer, benchmark tests, proving-ground tests, pull, blow energy.
For citation:

Yedygenov Ye. K., Vasin K. A. Test data of electromagnetic hammer for nonexplosive rock fracturing. MIAB. Mining Inf. Anal. Bull. 2020;(5):80-90. [In Russ]. DOI: 10.25018/0236-1493-2020-5-0-80-90.

Acknowledgements:

The work was performed in the framework of the Target Financing Program No BR05236712 «Technological Modernization of Mining Production Based on the Transition to the Digital Economy» (2018—2020) of the Ministry of Education and Science of the Republic of Kazakhstan and the innovation grant from JSC «The National Agency for Technological Development» (2016—2019).

Issue number: 5
Year: 2020
Page number: 80-90
ISBN: 0236-1493
UDK: 622.232.74
DOI: 10.25018/0236-1493-2020-5-0-80-90
Article receipt date: 13.12.2019
Date of review receipt: 30.01.2020
Date of the editorial board′s decision on the article′s publishing: 20.04.2020
About authors:

Ye.K. Yedygenov1, Dr. Sci. (Eng.), Academician of AMR RK, Head of the Department of Geotechnics,
K.A. Vasin1, Senior Researcher; PhD Student, Satbayev University, e-mail: kvas2500@mail.ru,
1 D.A. Kunayev Mining Institute, 050046, Almaty, Kazakhstan.

 

For contacts:

K.A. Vasin, e-mail: kvas2500@mail.ru.

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