A method for estimation of extensive air shower (EAS) primary particle parameters with the help of particle detectors of high mountain setups was developed. The results were obtained in the framework of “Pamir-XXI” project. A configuration of charged particle detector network was proposed capable of evaluating the primary particle energy and direction in the energy range 1-10 PeV in the best way. A new method of EAS event separation by primary particle mass on the basis of muon angular distribution is described. A muon tracker of area 400 m2 is to be used for this purpose. The obtained accuracy estimates should be considered as the upper limits of real experimental accuracy.
$^1$MSU, Faculty of Physics\
$^2$M.V.Lomonosov Moscow State University, Skobeltsyn Institute of Nuclear Physics (SINP MSU)\
$^3$Umarov Physical-Technical Institute of Academy of Sciences of Tajikistan
Science News of the Faculty of Physics, Lomonosov Moscow State University
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