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The results of studying the structure of the Taoudeni sedimentary basin, the largest basin in north-west Africa, are presented. The characteristic features of the basin associated with the development of the West African craton, and manifestation of the Hercynian and Alpine tectonogenesis are revealed. Based on modeling data, the low rates of sedimentation of Proterozoic and Silurian-Carboniferous sediments were established that contributed to the formation of oil-and-gas source rocks. It is concluded that it is necessary to continue exploration in the basin in connection with the high prospects of oil-and-gas potential.

Приведены результаты экспериментальных исследований по определению влияния целевых добавок к воде комплексного действия на основе жидкого натриевого стекла (Na2SiO3) и карбоната калия (K2CO3) на гидравлические характеристики и огнетушащую эффективность системы спринклерного пожаротушения. Определена относительная огнетушащая эффективность системы спринклерного пожаротушения, заполненная исследуемым водным огнетушащим раствором, по сравнению с системой спринклерного пожаротушения, заполненной водой без целевых добавок, при тушении модельного очага пожара класса 13А, при одинаковых условиях проведения натурных огневых исследований. Доказана эффективность предложенного водного огнетушащего раствора для применения его в системе спринклерного пожаротушения, которая отделена от системы хозяйственно-питьевого водопровода.

Наведено результати експериментальних досліджень з визначення впливу цільових добавок на основі силікату натрію та карбонату калію до води на ефективність гасіння пожежі твердих речовин системою спринклерного пожежогасіння у спеціальному боксі для проведення вогневих випробувань ВБК 280. Під час досліджень встановлено відносну вогнегасну ефективність водного вогнегасного розчину із вмістом цільових добавок на основі рідкого натрієвого скла та карбонату калію у воді, порівняно із водою без добавок під час натурних вогневих випробувань з гасіння дерев'яних стандартних модельних вогнищ пожежі класу А.

Introduction: The introduction to this paper deals with the question of defining fire-prevention distances for constructions in a modern energy enterprise operating on alternative energy sources, which can also simultaneously produce gas, electricity and heat from agricultural waste. The purpose, object and subject of the research are defined, and the basic methods used during the scientific work are presented. The analysis of the process of biogas production technology, which includes the indication of the most dangerous technological structure in the biogas production complex also involves an analysis of the existing means of fire protection, including the main technological equipment.Methods: The first part of the article gives a general description of the object, its constructive elements and scenarios of the emergence of a hazardous situation, which can lead to a fire or explosion in the fermenters. The effect of the size of the hole through which the gas flows and burns on the diameter of the flame and its temperature, creating a hazard for adjacent structures, was investigated. The results of calculations of the excess pressure of the explosion of biogas in the fermenter, which can occur as a result of an emergency situation, are demonstrated. The integrity of the fermenter elements was determined in the conditions of an excess explosion pressure, and the effect of the excess explosion pressure on the calculation of safe distances was demonstrated. The main part of the article defines the type of deformation in the main structural elements of the most dangerous structure in the complex (complete or partial destruction or damage) and, to a reasonable extent, the consequences to which this destruction can lead. The effect of the size of the hole through which the gas flows and burns on the diameter of the flame and its temperature, which creates a hazard for adjacent structures, was investigated. Using the “FlowVision 2.5” software packages and “MathCaD” software suites, the schemes of impact of the main forces on the elements of the fermenter’s biogas plants and the graphical models of the development of combustion in the fermenter during a possible fire, including the initial stage of burning and the fire climax, are presented. Based on the results of calculations for the scenario of the most dangerous accident, the maximum possible values of the height and radius of the flame, the cross-sectional area of the flame and the flame temperature are determined. The algorithm for calculating the safe distances between fermenters for the production of biogas is given. A justification for the minimum fire distances between the fermenters for the safe operation of the biogas production is given.Results and conclusions: The final part contains the main results of the research, in particular, of the actual scientific and practical task of ensuring explosion safety in biogas production. Furthermore, the method of estimating the safe distances between the fermenters for biogas production is sub-stantiated. Conclusions on the results of scientific work are presented and a list of literary sources used by the authors is indicated.