Rare Earth Elements as a Causal Factor of Geophagy among Herbivorous Animals     

Panichev  A. M.  Baranovskaya  N. V.  Chekryzhov  I. Ju.  Seryodkin  I. V.  Vakh  E. A.  Belyanovskaya  A. 《Doklady Earth Sciences》2021,499(1):599-603

Doklady Earth Sciences - Extensive geological and hydrobiogeochemical studies were conducted for the first time in two Sikhote-Alin (Primorskii krai) areas, where geophagy among wild ungulates has...  相似文献   

Correction to: Zeolite containing rocks of kudurs and reasons of geophagy within the territory of Sikhote-Alin Nature Zapovednik,Far East of Russia     

Panichev  Aleksander  Seryodkin  Ivan  Popov  Vladimir  Chekryzhov  Igor  Makarevich  Raisa  Lutsenko  Tatiana  Stolyarova  Tatiana  Sergievich  Aleksander  Khoroshikh  Pavel  Maksimova  Darya  Petrunenko  Yury 《Arabian Journal of Geosciences》2020,13(4):1-11

This paper establishes a mechanical model of the stress distribution in front of the driving face during coal roadway excavation. Theoretical research shows that the stress state in the plastic zone of the driving face is consistent with the limit equilibrium equation, and the elastic zone is in accordance with the equilibrium equation based on elasticity mechanics. Based on this improved mechanical state solution model, different coal material constitutive hypotheses are used for the analysis. The width of the plastic zone calculated under the brittle-perfectly elastic model can reach 2–5 times the height of the roadway, and the stress concentration coefficient can reach two or more times. 3DEC numerical simulation software was used to simulate the stress distribution of the heading face. The results of the simulation are similar to those of the theoretical analysis. Compared with the elastic-perfectly plastic model, the calculated results of the brittle-perfectly elastic model are more consistent with the numerical simulation results. The heading face coal during roadway excavation shows obvious damage, and the strength characteristics of the coal decrease.  相似文献   

Excess of Rare-Earth Elements in Plant Foods as a Cause of Geophagy among Ungulates in Gornyi Altai     

Panichev  A. M.  Baranovskaya  N. V.  Chekryzhov  I. Ju.  Seryodkin  I. V.  Vakh  E. A.  Elovskii  E. V. 《Doklady Earth Sciences》2022,507(1):964-967

Doklady Earth Sciences - Geological and hydrobiogeochemical studies carried out in two areas of active geophagy among herbivorous animals in the area of Teletskoye Lake in the Altai Mountains...  相似文献