SU1097799A1 - Monolithic concrete support for mine workings - Google Patents

Abstract

1. MONOLITHIC CONCRETE FASTENER FOR MINING WORKS, including temporary metal frames, reinforced concrete fasteners and a layer of concrete, characterized in that, in order to simplify the installation and ////////// frame, improving the bond of sprayed concrete with fixed rocks and reducing the loss of concrete mix for rebound, the pulling is made in the form of a cross, consisting of two plates, one puff plate installed perpendicular to the surface of the fixed rocks and made in the form of a single-slit wedge with a groove in his wednesday days of the part for installing the second cross plate into it. 2. The support according to Clause 1, about tl and h ayusha with the fact that the layer of sprayed concrete is placed in the spaces between the puffs and has a thickness equal to the gap between the temporary metal (L frame and fixed rocks. T.

Description

FIELD OF THE INVENTION The invention relates to mining, in particular to fastenings of mining operations during underground operations. Monolithic concrete lining is known, including metal lining with clamps, on which the concrete shell is then formed by form-based concreting, or without decking, and concrete tP. The disadvantage is the complexity of work, high consumption of metal and concrete. Known monolithic concrete lining for mine workings, including temporary metal frames, reinforced concrete fasteners and a layer of concrete C2. A disadvantage of lining is the difficulty of splitting the frames, filling and removing metal frames, and there is a large loss of concrete bounce. The purpose of the invention is to simplify the mounting and dismantling of temporary metal frames, improving the bond of sprayed concrete with fixed rocks and reducing the loss of concrete mix to rebound. The goal is achieved by the fact that in monolithic concrete lining for mine workings, including temporary metal frames, reinforced concrete taps and a layer of sprayed tone, the taper is made in the form of a chair consisting of two plates, with one talted slab installed perpendicular straight to the surface of the enlarged rocks and is made in the form of a single bevel wedge with a groove in its middle part for installing a second cross plate into it. In addition, a layer of concrete spatter: placed in the gaps between the puffs and has a thickness equal to the gap between the temporary metal frame and the fixed rocks .; Figure 1 shows the production, the fastening of the sprayed concrete, a longitudinal section; in Figures 2-4, sections A-A, B-B and B-B in Fig. 1, respectively, in Figures 5-7 - the connection and structures reinforced concrete pads. Monolithic concrete lining is installed as follows. After the mine workings out 1, the temporary metal frame 2 is mounted on the size of the installation step, the bearing elements of which are made of special profile. Between the frame 2 and the fixed rocks 3 there is left a gap equal to the thickness of the layer of subsequently erected concrete lining 4 and corresponding to the width of reinforced concrete tacks 5. The assembled frame 2 is connected by straps 6 to an adjacent, previously installed frame. The roof and sides of the excavation are tightened with reinforced concrete fasteners 5, which are placed in a razbezhku, placed radically with respect to the frame 2 and perpendicular to the surface of the rock contour of the generation 1 (Figures 1 and 2). With very weak, unstable fixed rocks 3 between the puff 5 and the rock 3, the metal mesh 7 is placed. Then, using a pneumatic concrete machine, the concrete is sprayed and filled with the concrete mixture between the puffs 5 and between the metal frames 2. At the same time, first of all blocking the concrete mix with cracks and depressions on the walls and in the roof of the mine workings, then uniformly fill the space between the frames 2 and the rocks 3, thus reaching the required thickness of the concrete lining 4 (Fig. 3). After setting and hardening to the required strength of the sprayed concrete lining 4, temporary metal frames 2 are removed (Fig. 4) and are reused, for example, to fasten the same production 1. The shafts 5 are made in the form of a single wedge-shaped plate. This form of tightening makes it possible to combine in time the execution of operations for placing the plugs 5, fixing them and unfolding the temporary metal frames 2. To increase the stability of the plugs 5, they are installed in pairs with the partition-clamp 8, placing them crosswise with respect to each other . Using the slots 9 and to, made in the middle part of one of the sides, respectively, of the puff 5 and the partition 8, the latter are joined to form a crosspiece. The use of monolithic concrete lining of mine workings allows to simplify the installation and removal of temporary metal frames, eliminate the filling-in process of the fixed space, reduce the consumption of 3 concrete by using reinforced concrete shafts as reinforcement of monolithic concrete lining and by reducing the loss of concrete for rebound, increase the coefficient 799 reuse metal frames, improve the adhesion of sprayed concrete to the rock contour of the excavation and the interaction of concrete lining with fixed rocks.

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Claims (2)

1. MONOLITHIC CONCRETE FASTENER FOR MINING, including temporary metal frames, reinforced concrete puffs and a spray-concrete layer, characterized in that, in order to simplify installation and rocks, it is made in the form of a single-axis wedge with a groove in its middle part for installation into it the second plate of the cross. 2. Lining pop. 1, characterized in that the spray layer is placed between the puffs and has a thickness equal to the gap between the temporary metal frame and the fixing rocks. j η g with h \ h (¾¾ TU AO UM ...... OSH- W2J л lzейi) (¾¾¾ uc became un, casu — o_ (M «bsai – О – ssaJ – ш, ---, J // -J ^g A 1Θ97799