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The paper is devoted to studies of the location until 1917 in the neighboring districts (Peterhof, Tsarskoye Selo, Shlisselburg and St. Petersburg) of St. Petersburg province of large, representative and prestigious suburban estates - "estates of the highest nobility". Such representative estates received special material and intangible characteristics that distinguish them from "ordinary" estates. Typical examples are considered: Grevov's estate in Koporye, Shuvalovs' estate (of Vorontsova-Dashkova E.A.) "Pargolovo", Belogorka estate, Irinovka estate. The relevance of the work is caused by the fact that an active search for ways to adjust estates is currently underway. To carry out these works, it is necessary to understand the unique features of adjustment objects. In the European and domestic practice of adjustment of objects, special attention is paid to estates belonging to the upper strata of society (in pre-revolutionary Russia, to the nobility). The purpose of the study is to identify a separate type of object "near estates of the highest nobility". Results preserved and existed earlier estates of the highest nobility are analyzed. The regularities of the formation of features and characteristics are revealed, which allows distinguishing them into a separate type of objects - "near estates of the highest nobility".

The article describes the effect exerted by variability of gas content of coal seam on its mining process parameters: geometry of longwalls, directions and velocities of face advance in longwalls and gateways, as well as overmining and (or) undermining of close-spaced seams. The results are applicable in efficient mine layout and safe mining design.