Engineering Physics Annotation << Back DETERMINING THE SIZE OF ZONES OF TENSILE DEFORMATIONS IN THE HOST ARRAY OF PREPARATORY WORKINGS NGUYEN VAN MIN, V.A. EREMENKO, V.I. LEIZER, M.A. SUKHORUKOVA, S.S. SHERMATOVA The article presents the results of research devoted to the study of the structure of the formation of zones of tensile deformations in the host array during the sinking and maintenance of preparatory workings. Modeling of the stress-strain state of the array was performed in the Map3D software package. The obtained results of quantitative analysis are currently used for calibration of the numerical model during the entire period of sinking and maintenance of existing preparatory workings. The results of evaluating the accepted parameters of workings and calculating the values of microdeformations of the host array are shown. The excavation workings in the survey area of intense fracturing and forming zones of tensile strains develop from the border with values με ≥ 350 and used to determine the distance from the roof and sides of the excavation the skeleton to the border of microstrain values με = 350 (zone of possible destruction of the array). The obtained results of calculations allowed us to clarify the correctness of the selected design parameters of the anchor support of workings for the IIIA category of disturbance of the mountain range. It was found that the design length of anchors 1,6–1,8 m is sufficient to secure their locking part in a stable part of the array beyond the zone of action of tensile deformations with values of με ≥ 350. Keywords: tensile deformations, compressive loads, tensile cracks, operating stresses, microdeformation με, hookbrown strength criterion, numerical modeling, cross section, roof and sides of the preparatory work, Map3D and RocData programs, model calibration, anchor support. DOI: 10.25791/infizik.07.2020.1148 Pp. 39-48.