Zobrazeno 1 - 10
of 19
pro vyhledávání: '"A. M. Petreev"'
Autor:
A. M. Petreev, V. N. Karpov
Publikováno v:
Journal of Mining Science. 57:447-458
The authors address the problem connected with the determination of efficient rotary percussive drilling techniques with DTH hammers and present estimation criteria for their value ranges such that to ensure drilling at minimum energy content and wea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b0595f2ca102651d99fba5f7f1589657
https://doi.org/10.1134/s1062739121030108
https://doi.org/10.1134/s1062739121030108
Publikováno v:
Journal of Mining Science. 55:547-555
The interaction of an open pipe with an internal soil plug according to the Coulomb’s law of dry friction is investigated. Different soil and pipe models are considered. For all models, finite-difference solutions are obtained, for some—analytica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d545a865f7b556e129a1fd52ed7de3bd
https://doi.org/10.1134/s1062739119045892
https://doi.org/10.1134/s1062739119045892
Autor:
A. Yu. Primychkin, A. M. Petreev
Publikováno v:
Journal of Mining Science. 52:135-145
The article describes bench tests and calculations aimed to determining effect of parameters of ring-type elastic valve on variation of average pressure in the valve clearance. The results allow refinement of the design model of ring-type elastic val
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d97c460674e8273e0ef0a0581aa1e3bb
https://doi.org/10.1134/s1062739116010224
https://doi.org/10.1134/s1062739116010224
Autor:
A. Yu. Primychkin, A. M. Petreev
Publikováno v:
Journal of Mining Science. 51:562-567
The article describes computer modeling of three options of pneumatic percussion unit in a circular impact machine. All options have similar structure diagrams and mechanical linkage parameters but different control of energy-carrier feed in a workin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::805ed1a0e4e5ae65a4164978b9262fe3
https://doi.org/10.1134/s1062739115030187
https://doi.org/10.1134/s1062739115030187
Publikováno v:
IOP Conference Series: Earth and Environmental Science. 262:012030
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38468fb722d66ffb1420c66dc258bb61
https://doi.org/10.1088/1755-1315/262/1/012030
https://doi.org/10.1088/1755-1315/262/1/012030
Autor:
A. M. Petreev, A. S. Smolentsev
Publikováno v:
Journal of Mining Science. 47:787-797
The article describes the experiments on energy transmission from a percussion machine to a pipe via a cone adaptor. The calculation model of the said percussion system is presented, and the calculation and experimental results are compared. It is qu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::122721c722c99231557c0d0f65e15526
https://doi.org/10.1134/s1062739147060116
https://doi.org/10.1134/s1062739147060116
Publikováno v:
Journal of Mining Science. 46:416-424
The authors discuss general schemes of air percussion machines equipped with ring-shape elastic valves, substantiate parameters of an elastic valve calculation model, derive relations for the valve sizes, material characteristics and actuation pressu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4610879aa6d6e3dd0e5e788efa298a96
https://doi.org/10.1007/s10913-010-0052-3
https://doi.org/10.1007/s10913-010-0052-3
Autor:
A. M. Petreev, A. S. Kondratenko
Publikováno v:
Journal of Mining Science. 44:559-568
The paper illustrates experimental determination of the effect exerted on core removal from a pipe by the initial moisture of the core, squeeze force and impact energy. An adequate numerical model of the system “pipe — earth core” is presented
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2fb0f6aa760bec0bc35422e9a37d17d
https://doi.org/10.1007/s10913-008-0063-5
https://doi.org/10.1007/s10913-008-0063-5
Autor:
A. M. Petreev, D. S. Vorontsov
Publikováno v:
Journal of Mining Science. 38:481-487
The process of actuation is considered for the inertial element in the improved air-distributing system of pneumatic puncher whose dimensionless parameters are determined.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1986efa8d44af2c7dd16e58843cd2b17
https://doi.org/10.1023/a:1023995917672
https://doi.org/10.1023/a:1023995917672
Publikováno v:
Journal of Mining Science. 33:543-548
The following characteristics of self-transportation have been established. These results offer the possibility of further analysis of self-transportation, taking the characteristics of the specific generator of the internal active forces into accoun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ce5f6c4209bba204b45a28a5e752b8e
https://doi.org/10.1007/bf02765633
https://doi.org/10.1007/bf02765633