Technological and design features of flat- rod elements with usage of composite reinforced concrete |
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24/09/2014 5:19pm
New elements in relation to machine building and mining industry with application of construction materials using mount system of mine opening as an example are considered. The elements combine durability and reliability necessary for exploitation. Reliability of composite reinforced concrete is confirmed by experimental and theoretical researches. Flat-rod elements with application of composite reinforced concrete are the results of synthesis of structural, steel and concrete elements, acquired during this advantages and peculiarities, determine their efficiency. UDK 624 Technological and design features of flat- rod elements with usage of composite reinforced concrete
Gasii G.M.Ph.D. in Engineering Science,
Problem statement in general terms and its connection with important practical tasksEfficiency of bonding technique is of great importance in modern economic conditions. Constructions should provide enough reliability and be simple in fabrication. In recent years mining and geological conditions during mining works changed for the worst considerably. This happens due to gradual depreciation of existing mountings. Repair or building of new mountings is labour-intensive process and requires large material costs. Considering such state of mining industry, solution of task concerning development and implementation of new and reliable ways of rock lining with minimal costs is of high priority. Analysis of latest researches and publicationsDisadvantages of existing mount systems give a rise to great amount of researches, focused on the reliability, efficiency and safety of mine opening improvement. Most of the researches are devoted to improvement of design solution and means of design [3]. Statement of unsettled before parts of general problemIn result of analysis of current state of mining industry and latest researches, one may conclude that today the question of development and study of new ways for secure mounting remains unsolved. Statement of a problemTo develop new flat-rod elements of rock lining with the usage of composite reinforced concrete and to study their technological and design features. Base material for research Having analyzed the fulfilled research [1, 2], advantages and disadvantages of existing mountings [3], the new type of mounting construction was suggested - composite reinforced concrete structural support systems. Assignment of such systems is to provide heavy duty of opening due to increase ofmounting holding capacity. Main point of such constructions is in reduction of production costs, installation lead time and in securing of necessary stiffness and integrity. Support system consists of steel cancellation structure and reinforced concrete slab (fig.1).
Figure 1. Plane-rod element of composite reinforced concrete structural system
During design of mountings there is a task to get rid of the disadvantages of steel and concrete elements. The question concerning the choice of strength grade of concrete, steel tubes grade, acceptance of reinforcement ratio is of great importance. Conclusions and prospects for the development in this directionDesign and technological features of the developed support system allow to save on material due to their rational use - reinforced concrete slab protects from the rock fall, takes up pressure from the ground and equidistributes it into steel elements of the lattice. Usage of developed design elements allows to road lining in deep depth. It is stated that elements of support construction work together under loads. The way of combination of reinforced-concrete and steel elements provide holding capacity of all the construction. References
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