SU1218125A1 - Method of constructing reinforced earth-concrete block support - Google Patents

Description

The invention relates to the construction of mine workings, namely the construction of cargo-carrying monolithic shells from the unloaded rocks of the marginal zone, and can be used in the mining industry, road and hydraulic engineering.

The purpose of the invention is to increase the depth, its support is supported.

FIG. 1 shows a mine working at the time of installation of lining (a variant of laying grids on a frame lining); in fig. 2 shows section A-A in FIG. one; in fig. 3 - mining after shotcreting the dumped rocks, removing the frames and applying the leveling layer; in fig. 4 shows a section BB in FIG. 3; in fig. 5 - mine production after gunning and tamping of unloaded rocks (option of hanging nets onto an anchor); in fig. 6 is a sectional view BB in FIG. five.

The method is carried out as follows.

Complete mine workings are fastened with frames 1, on which metal grids 2 and 3 are placed in layers in a support frame, and a larger number of grids can be laid, as they approach the exposed rock surface of the mine, the dimensions of the grids of the grids increase their carrying capacity and rigidity. So, in this case, the indicated parameters of the grid 3 exceed the corresponding parameters of the grid 2, laid directly on the frames 1. When laying the grids 2 and 3 on the frames 1, the places of their constant contact (in places supported by

five

0

0

frames) are connected by metal straps 4 or otherwise. The metal grids can be suspended and on the anchors 5 between the anchors, the supports 6 are installed, which press the grids 2 and 3 to the rock surface. Instead of pickups, a grid can be installed with cell sizes equal to the installation step of the anchors to the length of the working and in its section.

As the rocks of the marginal zone are unloaded from active stresses, they are destroyed. Unloaded and destroyed rocks, acting on the elements of grids 2 and 3, bend them, grid 2 with cells smaller than that of grid 3, eliminates spillage of destroyed rocks into mining production and accordingly perceives larger than grid 2 loads and deformations. This leads to the formation of volumetric reinforcement in the rock mass.

As the rocks are unloaded from the stresses acting in them or the maximum permissible values are reached by displacements of the production contour, the gunning of the grid 2 located on the surface of the mine is formed to form an insulating layer 7.

Then, the destroyed rocks of the anchored space are tamped with fastening solutions, which leads to the formation of a hardened zone 8 and reinforced concrete blocks 9. After the set of the required strength of the frame 1 with a cement solution is removed and a leveling layer 10 is applied to the surface of the production by spraying.

SI

% g.

Compiled by l. Berezkina

Editor O. KolesnikovaTehred I. VeresKorrektor A.T sko

Order 1101LZTi.razh470Subscription

VNIIPI USSR State Committee

for inventions and discoveries

113035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

METHOD FOR CONSTRUCTING AN INDUSTRIAL-CONCRETE BLOCK FASTENERS, including installation of lining with a hinge of reinforcement on it along the output circuit, gunning of reinforcement and grouting of unloaded rocks of the anchoring space, characterized in that, in order to increase the bearing capacity of the lining, the reinforcement is hung in the form of a series of nets that are laid on top of each other friend, while the mesh size and the diameter of the rods take with increasing as you approach the rock surface of the mine. Figure 1 g!