Aim. Developing the theory of diamond wire cutting of crystalline rocks for separating the facing stone blocks from the array by establishing links between individual geometric parameters of the side and the cutting process. Research methods. To achieve this aim were used the next method: analytical studies of the relationship between the geometric parameters of the process of diamond wire cutting, experimental study of the same geometric parameters of the process of diamond wire cutting of high-strength rocks to confirm or refute previously obtained analytical relationships, and statistical processing of data. Results. The length of contact of the diamond wire with the rock is an important criterion for the process of separating the blocks of facing rocks from the array. Given the unavailability of the diamond wire side in the array for direct measurement methods, there is a need for indirect determination of the contact length. It is proposed to use the length of the free section of the wire, as the total length of the wire remains unchanged during the cutting process. It is assumed that the length of the free section can be estimated by the distance between the diamond wire machine installation and the slope of the ledge. Analytical dependences between the specified sizes are considered. The existence of the obtained dependences and the strength of the correlation connection was confirmed by experimental studies in the conditions of the block quarry of the facing stone. Scientific novelty. At first time, the relationship between the distance of the diamond wire machine installation and the side of the diamond wire and the length of the free section of the diamond edging, which allows to control the length of contact of the diamond wire with rock in the cut. The obtained dependence is analyzed and it is concluded that the geometric parameters of the ledge will affect the length of the cut only in the initial stages of separation of the block of natural stone from the array. In the next stages, the length of the free section of the diamond wire depends only on the distance of the location of the diamond wire machine installation and the side of the diamond rope. Practical significance. The value of the optimal initial distance of the diamond wire machine placement to the slope of the ledge is found. The empirical dependence of the length of the free section of the diamond wire on the location of the diamond wire machine is also obtained
Purpose. The purpose of this work is to generalize the main aspects of the natural stone products’ reinforcement technology and to establish tendencies in the strength characteristics of these products. Methodology. The degree of relevance of the researched topic is established, the general characteristic of reinforcement as a technological process is given and the work on the given subject is analyzed. Recommendations for the preparation of samples for performance studies of strength characteristics are implemented and described. Recommendations on the selection and features of the use of tools for cutting, reinforcing elements and fixing mixture are given. The constituent elements of the experiment aimed at determining the strength characteristics of the samples are developed and described. Based on the results of the received data, the calculation of the values of the basic strength parameters during the destruction of the samples under the action of bending loads is performed. Results. Research of technology of reinforcement of products from a natural stone allows solving a number of problems on a way to improve the quality and competitiveness of production of the stone processing enterprises. A holistic and scientifically substantiated description of the reinforcement technology allows to systematize the knowledge about this technology and standardize the optimal order of its use, as well as to provide grounds for further study of its main technological aspects. In addition, the concomitant experimental establishment of improving the strength parameters of products as a result of their reinforcement proves the actual benefits of using this technology to improve the strength characteristics of the final natural stone product. Scientific novelty. The algorithm of using the technology of reinforcing natural stone with composite materials with indication of the peculiarities of this process is investigated, systematized and described. The degree of change in the strength characteristics of products as a result of their reinforcement is studied empirically. The expediency of using the technology of natural stone products reinforcement by comparing the strength properties of reinforced and non-reinforced products is substantiated. Scientific significance. The practical significance of the obtained results is embodied in the possibility of their use for the development of methodological and specific statutory guidelines for the introduction of reinforcement technology under the conditions of stone processing enterprises and for further research to optimize the described technological processes. At the same time, the results of the study of the strength parameters of composite elements reinforced with natural stone products are the firm argument that proves the feasibility of industrial use of this technology.
Purpose. The purpose of this work is to study the feasibility of using different types of composite materials for natural stone products reinforcement by comparing their strength characteristics. Methodology. Recommendations for the preparation of samples for strength research have been implemented and described. Recommendations for the preparation, adjustment and commissioning of fixed assets and materials used in the study are given. The constituent elements of the experiment aimed at determining the strength characteristics of the samples are developed and described. Based on the results of the obtained data, the values of the basic strength parameters during the destruction of the samples under the action of bending loads have been calculated. Results. The study of the technology of stone products reinforcement allows solving a number of problems related to improving the quality and competitiveness of stone manufacturing. A holistic and scientifically sound study of reinforcement technology allows an array of empirical data and developing the optimal order of its use. Scientific novelty. Systematization and review of existing methods of natural stone products reinforcement are performed and methods of their optimization with the help of modern composite materials are offered. The expediency of using fiberglass and basalt-plastic composite materials for the purpose of reinforcing stone products has been empirically investigated. The expediency of using fiberglass and basalt-plastic composite materials for natural stone products reinforcement by comparing the obtained values of strength characteristics has been substantiated. Practical significance. The practical significance of the obtained results lies in the possibility of their application in order to simplify, modernize and improve the technology of stone products reinforcement for its widespread introduction as one of the basic technologies in the conditions of stone processing enterprises. However, the research results confirm the fact of the expediency of using composite reinforcement (especially basalt-plastic) to improve the strength properties of stone products.
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