CN216044144U - Arrangement structure for improving two-stage inclined and vertical shaft ventilation effect - Google Patents

Abstract

The utility model provides an arrangement structure for improving the ventilation effect of two-stage inclined shafts and vertical shafts, which comprises an upper inclined shaft and a lower inclined shaft, wherein the upper inclined shaft and the lower inclined shaft are connected through a middle flat tunnel, an upper inclined shaft construction branch hole is arranged in the middle of the upper inclined shaft, a middle flat tunnel construction branch hole is arranged in the middle flat tunnel, an air inlet system is arranged at the middle flat tunnel construction branch hole, and the upper inclined shaft construction branch hole is arranged as a first air outlet. The utility model can greatly reduce the construction difficulty of the inclined shaft or the vertical shaft, improve the operation environment of constructors and reduce the occurrence of safety accidents.

Description

Arrangement structure for improving two-stage inclined and vertical shaft ventilation effect

Technical Field

The utility model relates to the field of high-water-head pumping power stations, in particular to an arrangement structure for improving the ventilation effect of two-stage inclined shafts and vertical shafts.

Background

Generally, when the water diversion system of the pumping power station has a high water head, two-stage inclined shafts or vertical shafts are generally arranged, and the lengths of the upper inclined shaft and the lower inclined shaft or the vertical shafts are generally equivalent, so that the arrangement has the advantages that the construction difficulty difference of the upper inclined shaft and the lower inclined shaft or the vertical shafts is not large, the construction period difference is small (the inclined shafts are taken as an example for explanation, and the shaft conditions are the same). However, for a high-water-head pumping and storing power station, because the water head is higher, the inclined shafts are longer, the construction difficulty of the upper inclined shaft and the lower inclined shaft is very high, and the construction period is not easy to guarantee. In addition, due to the influence of construction equipment, when the length of the inclined shaft is too long, the raise boring cannot independently complete the guide hole back-drawing work. In contrast, in the pumped storage power station such as the crude terrace of the early days in China, the Xilong pond, the Baoquan and the like, the construction is carried out from bottom to top by adopting the Swedish Alimak climbing tank, but when the cavern exceeds 250m, if the temperature in the cavern is lower than that outside the cavern, the temperature in the cavern is rainy on cloudy days and the air pressure is lower, the smoke discharge and dust removal in the cavern are difficult, fog cloud can be formed, and the smoke influences the measurement and the paying-off. Moreover, the air is directly supplied to the working face, the air condition on the working face is still enough, and the passage leading to the working face has an oxygen deficiency condition, so that a constructor needs to carry an oxygen cylinder, thereby increasing the potential safety hazard and increasing the construction operation difficulty. And the arrangement form of three-level inclined shafts is adopted in the engineering, and although the excavation length of each section of inclined shaft can be reduced due to the arrangement of the three-level inclined shafts, a plurality of construction processes can be increased, the construction organization design is more complex, and the internal water pressure born by partial hole sections is higher, so that the investment is increased, and the construction period is prolonged.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide an arrangement structure for improving the ventilation effect of two-stage inclined shafts and vertical shafts. The utility model can greatly reduce the construction difficulty of the inclined shaft or the vertical shaft, improve the operation environment of constructors and reduce the occurrence of safety accidents.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model provides an improve the arrangement structure of oblique, shaft ventilation effect of two-stage which characterized in that: the inclined shaft construction system comprises an upper inclined shaft and a lower inclined shaft, wherein the upper inclined shaft and the lower inclined shaft are connected through a middle flat tunnel, an upper inclined shaft construction branch tunnel is arranged in the middle of the upper inclined shaft, a middle flat tunnel construction branch tunnel is arranged in the middle flat tunnel, an air inlet system is arranged at the middle flat tunnel construction branch tunnel, and the upper inclined shaft construction branch tunnel is arranged as a first air outlet.

Further: the upper inclined shaft is arranged at the upper part of the upper inclined shaft construction branch hole and is arranged at the lower part of the upper inclined shaft construction branch hole, the ground surface drills geological drill holes at the lower part of the upper inclined shaft construction branch hole, and the geological drill holes can be arranged as second air outlets.

Further: and the upper inclined shaft construction branch hole can be used for erecting a raise boring drill.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

according to the utility model, by arranging the upper inclined shaft construction branch hole, the middle horizontal tunnel construction branch hole and the geological drilling, the ventilation and smoke exhaust effects of the working face and the construction channel are greatly improved, the construction difficulty of the inclined shaft or the vertical shaft is greatly reduced, the operation environment of constructors is improved, and the occurrence of safety accidents is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a partially enlarged view of fig. 1A.

Reference numerals: 1, descending an inclined shaft; 2-upward inclined shaft; 3, constructing a branch tunnel in the inclined shaft; 4-middle flat hole; 5-constructing a branch tunnel in the middle flat tunnel; 6-geological drilling; 7-the upper half section of the inclined shaft; 8-upward inclined shaft lower half section.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in conjunction with the specific examples, but it should be understood that the drawings are for illustrative purposes only and should not be construed as limiting the present invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the utility model.

The utility model is further illustrated by the following figures and examples, which are not to be construed as limiting the utility model.

As shown in fig. 1-2, an arrangement structure for improving two-stage inclined shaft and shaft ventilation effect comprises an upper inclined shaft 2 and a lower inclined shaft 1, wherein the upper inclined shaft 2 and the lower inclined shaft 1 are connected through a middle flat tunnel 4, an upper inclined shaft construction branch tunnel 3 is arranged in the middle of the upper inclined shaft 2, a middle flat tunnel construction branch tunnel 5 is arranged in the middle flat tunnel 4, an air inlet system is arranged at the middle flat tunnel construction branch tunnel 5, the air inlet system adopts press-in type air inlet for the middle flat tunnel construction branch tunnel 5, and the upper inclined shaft construction branch tunnel 3 is arranged as a first air outlet.

The length of the lower inclined shaft 1 is controlled within 300 m; the length of the rest inclined shafts is set to be the upper inclined shaft 2, and the inclined shafts are preferably controlled within 300m according to the practical construction condition of the longest water diversion inclined shaft constructed in China at present.

The upper inclined shaft 2 is arranged on the upper portion of the upper inclined shaft construction branch hole 3 to be an upper inclined shaft upper half section 7, and the lower portion of the upper inclined shaft construction branch hole 3 is arranged to be an upper inclined shaft lower half section 8, namely, the upper inclined shaft construction branch hole and the lower inclined shaft construction branch hole are divided into an upper inclined shaft upper half section and a lower inclined shaft lower half section.

And a geological borehole 6 is drilled and connected with the ground surface inclined underground half section 8, and the geological borehole 6 can be used as a second air outlet.

And the upper inclined shaft construction branch hole 3 can be used for erecting a raise boring drill. And the lower half section 8 of the upper inclined shaft to the middle horizontal tunnel 4 adopt a raise boring machine to carry out guide hole construction, and adopt a climbing tank to carry out reverse-pulling hole-expanding construction.

And the upper half section 7 of the upper inclined shaft adopts a raise boring machine to carry out guide hole and reverse-pull hole expanding construction. The air inlet system, the first air outlet and the second air outlet are arranged, so that the ventilation and smoke exhaust quality in the tunnel during tank climbing construction is guaranteed. And the construction of the lower half section 8 of the upper inclined shaft and the construction of the upper half section 7 of the upper inclined shaft are simultaneously carried out, so that the construction progress can be accelerated.

The air-out principle of first air outlet: the construction method is characterized in that after a raise boring is erected on an upper inclined shaft construction branch hole 3, guide hole construction is performed downwards to form a small ventilation skylight, oxygen and smoke are pressed out from a tunnel face through an air inlet system during construction, and air is exhausted from a newly added upper inclined shaft construction branch hole 3 through a guide hole when the construction is performed to a position with the guide hole, so that the circulation of air in the hole is ensured.

The air-out principle of second air outlet: based on geological drilling 6 (from earth surface drilling to inclined shaft), after climbing the tank and constructing to the position of the geological drilling 6, the chimney effect of the geological drilling 6 is fully utilized, and the ventilation and smoke exhaust effects of the working surface and the construction channel are greatly improved.

When the upper inclined shaft 2 adopts top-down full-section expanding excavation, the air pulling effect of the through rear pilot shaft is fully utilized, air is respectively assisted to the middle horizontal tunnel construction branch hole 5 and the upper inclined shaft construction branch hole 3 according to requirements, and the forced air inlet is adopted, so that the ventilation effect in the hole in the construction period is guaranteed.

According to the description of the utility model and the attached drawings, a person skilled in the art can easily make or use the arrangement of the utility model for improving the ventilation effect of two-stage inclined and vertical shafts, and can produce the positive effects recorded in the utility model.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.

Claims (3)

1. The utility model provides an improve the arrangement structure of oblique, shaft ventilation effect of two-stage which characterized in that: including going up inclined shaft (2) and inclined shaft (1) down, go up inclined shaft (2) and inclined shaft (1) down and connect through well open cut (4), go up inclined shaft (2) middle part position and set up inclined shaft construction branch hole (3), well open cut construction branch hole (5) in well open cut (4), well open cut construction branch hole (5) department sets up air inlet system, it sets up as first air outlet to go up inclined shaft construction branch hole (3).

2. The arrangement for enhancing the ventilation of a two-stage inclined shaft and a vertical shaft as claimed in claim 1, wherein: go up inclined shaft (2) and set up to go up inclined shaft upper half section (7) on last inclined shaft construction branch hole (3) upper portion, set up to go up inclined shaft lower half section (8) in last inclined shaft construction branch hole (3) lower part, the earth's surface has bored geological drilling (6) to the inclined shaft lower half section (8), and geological drilling (6) can regard as the setting of second air outlet.

3. The arrangement for enhancing the ventilation of a two-stage inclined shaft and a vertical shaft as claimed in claim 1, wherein: and the upper inclined shaft construction branch hole (3) can be used for erecting a raise boring drill.

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