SU1671866A1 - Shaft tunneling method with pre-shaft drifting - Google Patents

Abstract

The invention relates to mining and m. used in the construction of trunks with pristvolnymi workings (PV) in the rocks of any fortress. The goal is to increase the efficiency of use due to seismic loads on the trunk lining. The method includes the penetration of the trunk and the subsequent penetration of the SP with the construction of permanent support. When penetrating the wellbore in the zone of its contact with the wellhead, prior to the erection of permanent support, cavities form in the explosive body by drilling out of the wellbore by explosive destruction of the rock and its cleaning. At the same time, a concrete pad is made in the soil of each cavity, an enclosing wall is installed along the outer surface of the trunk support and the cavity is filled with a porous material. The work is repeated along the entire length of the area of contact of the shaft shaft with the ST. 8 il.

Description

The invention relates to mining and can be used in the construction of trunks with pristvolnymi workings in the rocks of any fortress.

The aim of the invention is to increase the efficiency of use by reducing the seismic loads on the borehole support.

Fig. 1 shows a driving pattern, a stage of drilling and loading bore holes into the body of a near-vertical vertical mine workout, during cavity creation during the construction of a shaft; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1; Fig. 4 shows the shaft shaft, the position in the bottomhole after blasting holes during cavity creation; Fig. 5 shows the stage of creating a safety shield and the erection of reinforced permanent support; Fig. 6 illustrates the stage of drilling and charging elongated holes in the construction of a near-vertical vertical mine workout; figure 7 - section bb In Fig 6; Fig. 8 shows the position in the bottom of a near-vertical vertical mine workout after blasting the elongated holes.

The proposed method includes a vertical shaft and the subsequent penetration of the shaft production 1, for example, a bunker, blasting the elongated holes 2 under the protection of the safety screen 3, which is created when the barrel is being drilled to form part 4 of its coO VI

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contact with the development of cavity B. which is filled with porous material 6. and creates cavity 5 by drilling from the barrel before erecting it permanently 7 wells 8 explosive destruction, and cleaning the rock 9 is done. In the soil of each cavity 3 a partition wall 10 is installed and a concrete pad 11.

The method is implemented as follows.

When the shaft is carried out in the first period of construction with the approach to the bottom to the section 4 of the contact of the shaft with the bunker 1, wells 8 are drilled into the body of the latter, followed by charging and blasting. After the blasting of wells 8, the broken rock 9 is cleaned up. As a result, a cavity 5 is obtained to create a safety screen 3.

The porous material 6 is poured onto a layer of freshly laid concrete CUSHION 11, behind the enclosing wall 10, for example, made of wood, mounted along the cross-section contour in a permanent support 7 penetration, after which the detachment, descent, centering of the formwork and the construction of permanent support 7, for example reinforced concrete, at the entrance.

With the advancement of the mine shaft in the area 4 of contact with generation 1, wells 8 are drilled into the production body 1, followed by charging and blasting, after which the crushed rock 9 is removed. The hardened layer of the concrete cushion 11 laid on the previous level is removed. It prevents spillage of porous material 6, which is also filled at the previous stowage. After cleaning the broken rock 9, backfilling of porous material is made.

6 on a layer of concrete cushion 11 for the enclosing wall 10, followed by separation, descent, centering of the formwork and erection of reinforced permanent lining 7 to the next entry.

The above works are repeated along the entire length of the section 4 of the contact of the shaft shaft with output 1. As a result, a safety

a shield that protects the erected reinforced permanent support 7 from seismic loads when blasting the elongated holes 2 during the penetration of the bunker 1. The penetration of the output 1 speed

in the second period of construction, after sinking the shaft to the final depth, weighed permanent vessels at the construction of a complex of workings of the near-wellbore yard.

Claims (1)

Invention Formula The method of penetration of the trunk with pristvolny production, including the driving the shaft and the subsequent penetration of the near-shaft production with the erection of a permanent support, characterized in that. in order to increase the efficiency of use by reducing seismic loads on lining the trunk, when penetrating the latter, in the zone of its contact with the pristol production, prior to the erection of the permanent lining, they form cavities in the body of the prune generation by drilling from the wellbore, explosive destruction of the rock and its cleaning, while in the soil of each cavity a concrete pad is made the outer surface of the lining of the barrel and the cavity is filled with a porous material. , / -V V FChZ t p l $ l u g  /  S / / VI ° 1J SP Sl  S    Hl vjj i  X S, -. I / U xx from -vl 00 O) Ol FIG. eight