SU1257187A1 - Method for supporting mine workings - Google Patents

Description

The invention relates to mining operations, in particular to methods of fastening mining operations, and can be used during mining operations in a drilling-and-explosive method with application of sprayed concrete onto a metal grid, carried out following the bottom-hole advance.

The aim of the invention is to protect the lining against blows of rock pieces when blasting holes in the bottomhole.

Figure 1 shows the end of the erected support from the side of the slaughter} in figure 2 - section A-A in figure 1.

The method of fastening the mine workings is as follows.

Following the advancement of the slab 1, the construction of a splash-7NON lining consisting of a grid 2 fixed on the contour and a layer of the sprayed concrete mix 3 applied to it is carried out. The butt of the raised lining usually lags behind the bottom of the slab 1. rocks. Grid 2 is mounted with a margin of length. After

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the erection of a support area with a grid 2 envelops the end of the applied layer of sprayed concrete mix 3 and places it along the surface of the erected 5 support, secured in this position in any way, for example using metal wire. To prevent the direct impact and damping of the force of impact of rock pieces when blasting holes in the bottomhole, damping pads 4, for example, wooden bars, are installed between the surface of the grid 2 and the support. The impact energy of the rock pieces is absorbed by the net 2 and the damping pads 4, as a result of which the erected support is not disturbed. Damping pads 4 can be installed both along and across the mine. The margin of the length of the grid 2 is set equal to the distance from the end of the erected support to the end of the section of the rock spread along the working. After another blasting in the bottom hole, the folded end of the grid 2 is detached from the support, straightened and placed along the non-fixed section of the excavation, then a layer of concrete mix is applied onto the grid 2. 30 Next, the work cycle is repeated,

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Editor N. Slobod Nick

iflug.2

Compiled by L. Berezkina

Tehred L. Serdyukova Proofreader A. Zimokosos

Order 4889/25

Circulation 470 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Claims (1)

METHOD FOR MOUNTING MINING PRODUCTION, including erecting sprayed concrete lining after advancing the face by installing a mesh on the surface of the mine and applying a layer of sprayed concrete mixture on it, characterized in that, in order to protect the lining from impacts of pieces of rock when blasting holes in the face, the mesh they are mounted with a margin of length, while the mesh surrounds the end face of the applied layer of spray concrete and place it along the surface of the erected lining, and damping punctures are installed between the surface of the mesh and the lining dyka, and the reserve of the mesh length is set equal to the distance from the end of the erected crepe to the end of the rock spread along the mine. fie. 1