SU1645532A1 - Method of sinking dropshaft into stratified soil - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to the field of mining and is concerned with the construction of shafts with overhead support. The purpose of the invention is to reduce material and labor costs. The method includes lowering in forshakhta 7 in strata 1-6 drop mounting I1 with the blade part 8 of the segments with the help of jacks 12. The cuff 14 is mounted to the blade part 8 and the ring 13, and shelves 15 are mounted on the cuff 14

Description

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crushed clay 16. In forshakhta 7, seal 17 is installed with a layer of paste-like clay. The lowering of the lining 11 is carried out with the injection of compressed air 20 under the pressure of the head h

The invention relates to mining, namely the construction of shafts by the method of immersion lining under the protection of the mud,

The aim of the invention is to reduce material and labor costs.

FIG. 1 shows a shim gasket according to the invention; in fig. 2 - section along the blade part of the lining.

The method of immersion, for example, in the formations, composed of aquiferous silty sand 1, sandy loam 2, refractory loam 2, sandy loam 4 with pressure h, clay 5, aquiferous lime 6 with the highest water inflow, includes lowering into forshacht 7, in which the knife part 8 was originally assembled from sliding 9 and fixed 10 segments, lower lining 1 1 with hydraulic jacks 12. Lower lining 11 includes the first ring 13 with cuff 14 and shelves 15. Mladle 16 is laid on the cuff 14. Before lowering the lining P .. pre-determined poppy imalnye hydrostatic pressure head h groundwater at road immersion and the formation (limestone 6) with the largest

water inflow. Forshakhty level 7

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an elastic compaction 17 is installed and a layer of paste-like clay composition is placed above it, and the lining 11 is lowered into the fixed space of the clay solution 18 with a height equal to the thickness of the formation (limestone 6) with the largest water inflow, and with injection into the fixed space of compressed air 20 with a pressure equal to the maximum pressure of the hydrostatic head h in the layer of sandy loam 4.

The penetration of the trunk in this way are as follows.

After construction, the forshaft 7 assembled the knife part 8, consisting of sliding 9 and fixed 10 segments rigidly attached to the descending lane 11. In segments 9, install

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groundwater and maintaining the height of the mud column, equal to the thickness of the reservoir 4 with the largest water inflow. 2 Il.

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hydraulic jacks 12, the total capacity of which in three segments 9 symmetrically interconnected should not be less than the mass of the trunk lining; The first ring 13 of the lining is mounted on the knife part 8, rigidly fastened to the knife part 8, then the elastic cuff 14 is mounted, rigidly fastened with the joint of the ring 13 and the knife 8. Above the support ring 13, subsequent rings of the support 1 1 are increased to the greatest possible height, and shelves 15 are mounted at the right distance from the ring 13, rigidly connecting it with the support 1I. Suspended by the mechanism of excavation of soil in the bottom and shipment of it from the bottom, then lead the development of soil p to the desired depth relative to the blade of the blade part 8, leaving the soil berm along the blade of the required size. After completing these works, the first group of sliding 9 segments, symmetrically interconnected, begins to dive to a depth equal to the maximum travel of the jack 12, then the second group of sliding 9 segments symmetrically interconnected to the same depth is immersed, and after switching to the discharge of all jacks of the support 11 under the action of its own mass, together with the rigidly attached segments 10, itself sinks to the same depth.

The repetition of the above processes in the same sequence, the lining is immersed to a position where the top edge of the seal 14 drops slightly below the ledge in the forchhaft 7. After that, the annular space between the lining element 13 and the seal 14 is filled with thick, compacted clay 16, and again continues in that the same sequence all the processes of penetration, building rings and lowering lining. When the seal 14, 16 begins to descend beyond the bottom of the forshaft, the shaft penetration is stopped, the space between the forshahtay and the support is filled to

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Claims (1)

SUMMARY OF THE INVENTION A method of immersing the lowering lining in soil strata, including its erection in the foreshaft and lowering with the submission of clay mud into the fixed space, characterized in that, in order to reduce material and labor costs, the maximum hydrostatic pressure of the head> groundwater on the immersion route is preliminarily determined and the reservoir with the greatest water inflow, and at the level of the foreshafts establish an elastic seal of the fixed space and place a layer of paste-like clay complex over it ozition, and lowering is carried out with injection of compressed air into the fixed space at a pressure equal to the maximum pressure of the pressure of the groundwater, and while maintaining the height of the column of clay mud (equal to the thickness of the reservoir with the highest water inflow, A-A $ ig. 2