22 UDC 622.831;622.281.3 A.B. Begalinov, Doctor of Technical Sciences (PhD), Professor, Head of the Department «Destruction of rocks and mine construction», rgpshs@ntu.kz Ye. <...> T. Serdaliyev, Candidate of Technical Sciences (PhD), Professor, serdaliev.yerdulla@gmail.com D.B. Amanzholov, Master of Technical Sciences (mining), 3747437@mail.ru Zh. <...> G. Kenessov, Undergraduate (Magistracy), kenesov@gmail.com Noncommercial Joint-Stock Company «Kazakh National Research Technical University after K.I. Satpayev» (Almaty, Republic of Kazakhstan) FASTENING TECHNOLOGY OF UNSTABLE UNDERGROUND WORKINGS COMPOSED OF MINERAL SALTS BY CHEMICAL ADDITIVES Мақалада минералды тұздардан құралған орнықсыз таужыныстары сілемінде кен штректерін алдын-ала бекемдеу арқылы өту технологиясын зерттеу мәселелері қарастырылған. <...> The test to study the effectiveness of the underground excavation fastening technology by chemical additives is carried out on the chemical and mechanical unstable rocks composed of mineral salts of the «Akbakai» field located on the Akbakai deposit field. <...> Geological and mining conditions of Akbakai deposit are not very complex. <...> The layer of the ore is very monotonous, normal polymictic sand and layered with a thin layer gravelite aleurolite [1]. <...> The next layer of rock Akbakai formed from Devonian volcanic-sedimentary rock layers which locate on the western part of the deposit. <...> The lower part of the layer composed of the andesit and andesit-basalt porphyrite, while top layers consisting of tufa and acid formulations. <...> Composition of deposit rock of the top layer is loam. <...> The deformation modulus (E) is equal to 12 MPa. <...> The decrease of rock mass stability due to alevro sand and aleurolite layers made it impossible to continue further excavation. <...> Furthermore, in this place the rocks mass separated from each other and falling off the ceiling place (pic. 1). <...> The main objective of this work is to determine the cause of the carve and crack of rock fragmentation in the mines of «Akbakai» field. <...> The results of the research of rocks show that the cause Pic. 1. <...> The unstable rock mass of the deposit. of fissure and cracks is in their chemical composition with mechanical unstable mineral salts: dolomite, albite and muscovite in the form of aluminum and potassium. <...> After the determination of the cause of fragmentation, it was <...>