SU1663191A1 - Tunnel shield - Google Patents

Abstract

The invention relates to mining, in particular to means for conducting mining. The goal is to expand the functionality with a closed frame support and block inverse vault. The tunnel shield includes a housing (K), shield jacks placed in the lower rear part of the housing. In the upper front part K of the shield there is a hydroficated counter support fixed, and on the side walls of K there are hydroficated support skis of the shield control in a horizontal plane. After the mining of the rock mass has been developed and the shield is in place, the shield is moved to the bottom by means of shield jacks resting on the invert blocks, and it makes room for the next row of blocks to be laid. The use of the wedge blocks of the invert together with the shield allows them to be installed into the rock walls with expansion and increase the stability of the workings. 5 il.

Description

 The invention relates to mining, in particular to means for conducting mining.

The aim of the invention is to enhance the functionality of a shield with a closed frame support and a block invert.

FIG. 1 schematically shows a tunnel shield. side view; in fig. 2 - the same, top view; in fig. 3 shows section A-A in FIG. one; in fig. 4 shows a section BB in FIG. one; in fig. 5 shows a section B-B in FIG. one.

The shield includes a shield jacks 2 open in the front lower part, shield jacks 2 placed in the lower tail, supporting upper 3 and two lateral 4 hydroficated skis, as well as a protective visor 5 blocking the roof of the excavation in the place of installation of the frame lining

The tunnel shield works as follows.

After mining and loading, the rock mass with the help of machines and mechanisms for the size of the shield 1 by means of shield jacks 2, driven from the hydraulic pump station (nb shown), resting on the forks, moves to the slaughterhouse and frees up space for the next row blocks.

Since a one-way off-center (lower) location of the shield jacks 2 causes an overturning moment (partially compensated by the weight of the shield), overturning is prevented

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the inclusion of the upper hydraulically supported ski 3,

After the jack rods have returned to their original position and stacked a number of blocks of the return arch, for example, using an autonomous block paver and installing a fixed support frame 8 on them (Fig. 5) under the protection of the visor 5, the cycle is repeated. The control of the shield in the horizontal plane is carried out with the help of lateral support skis 4 driven by hydraulic cylinders 6.

The use of wedge blocks 7 invert together with the shield of the proposed design will allow them to be installed into the walls of the rock and thereby increase the stability of the workings.

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Claims (1)

Invention Formula A tunnel shield including a housing, shield jacks and a control mechanism, characterized in that, in order to expand the functionality of the tunnel shield with a closed frame support and block return arch, the housing is open at the bottom, and the shield jacks are located at the bottom rear of the shield housing The shield case is equipped with a hydroficated contruder installed in its front upper part, and hydroficated support skis of the shield control in a horizontal plane placed on the sides with enkah shield body .. .Abs hj / h- 5 hj // / f / s // /// /// /// i / yv /// /// /// // A / 77 777/77/77/7 / / 7 / I (/ // 7 / Zr / 77/77  2i Figure 1 b /// // P777 //// 777 7/7 /// /// /// at // // // // //   // / s t 2 Figure 2 Aa Fig.Z FIG.