SU1562451A1 - Method of safegurading vertical shafts - Google Patents

Abstract

The invention relates to the mining industry and allows increasing the operational reliability of vertical shafts (C) and reducing mineral losses in the subsurface at the opening and development of flat and inclined mineral layers. The mine floor is opened according to a block diagram. On the flank of the mine floor in block 1, central dual flank C 2 and 3 and ventilation C 4 pass, which are protected by safety pillars (PC) 5. The dimensions of PC 5 exceed the standard values by an amount equal to the length of the reference pressure zone 6. The size of each side of the PC 5 is taken as a multiple of the length of the lava 7. In the central block 8, coal is prepared and excavated within PC 9 and 10, in the middle of which the central C 11, 12 and 13 will be drilled through the undercut. Parameters excavation sites determined from the following relationships: L ₁ = ^H. [CTG (Ψ ₁ + Α)] / [COSΑ - SINΑ ^. CTG (Ψ ₁ + Α)]

L ₂ = H [CTG (Ψ ₂ - Α)]: [COSΑ + SINΑ ^. CTG (Ψ ₂ - Α)]

L ₃ = 2 (H + L ^_1. SINΑ) CTGΨ ₃

L 2 = ₄ (H ^-. L ₂ SINΑ) CTGΨ ₃ where L ₁ -size excavation site (RT) from its center to the boundaries of the dip, m

L ₂ - the same for the uprising, m

L ₃ - the full size of the WU along the strike from the side of the fall, m

L ₄ - the same from the uprising, m

H - depth of the central part of the VU from the surface, m

α - dip angle, hail

Ψ ₁ , _2, and Ψ ₃ are the angles of complete displacements determined by the current norms, degrees. The C 11 - 13 construction is carried out after reducing the deformations of the settling rocks to the level allowed for the C 11 - 13 lining and through them the entire mine field, including within the limits of the previously left PC 5 at the flank p. 4, is developed.

Description

FIG. 2

the middle of which will be carried out penetration of the central C 11, 12 and 13 on the earned array. The parapets of the excavation sites are determined from the following relationships: l H H fctg (k, + + /) J / rcosat-sinJ-ctg (, It Hrct8 (tt-JL) rCcosA + sin.A., (H + 1 , -sineQctgVj-, (Н-1А 4sin4) ctgVj, where lf is the size of the excavation section (WU) from its center to the boundaries by falling, m; 1 $, - the same, by the uprising, m; 1 - full size WU along the strike from the side of the fall, m; 1 - the same, from the side of the uprising, m; H - depth of the central part of the WU from the surface, m; “Ј - dip angle of layers, degree} tf, y and ys - total displacement angles, determined according to current standards, deg. Construction C 11-13 is produced after reducing the deformations of the settling rocks of to a level acceptable for lining C 11-13 and through them fulfill all the mine field, including within the previous 5 GSCH left flank at 4 C. yl.

The invention relates to the mining industry and is intended to protect vertical shafts at the opening and development of flat and inclined seams of minerals. The purpose of the invention is to increase the operational reliability of vertical shafts and reduce mineral losses in the subsoil.

Figure 1 shows the mine field section; figure 2 - the same plan; on fig.Z - the size of the section of the mine floor within the safety. pillars of the central trunks in figure 4 - sections across the strike and along the strike of the reservoir.

The method is implemented as follows.

 Mine field is opened according to the block diagram. On the mine floor flank in block 1, centrally twinned flank barrels 2 and 3 and a vent shaft 4 pass. specified pillars. The size of each side of the pillars in this case is taken as a multiple, the length of the lava 7 for the mine field being worked out.

After opening the trunks of the flank block, the construction of horizontal and inclined capital and main preparatory workings, as well as preparation for the commencement of cleaning operations, was carried out. At the same time, the preparatory workings open the central unit 8, and the preparatory workings pass into the soil

reservoir for the purpose of excavation of minerals. In the central block, coal is prepared and excavated within safety pillars 9 and 10 of the central shafts 11–13. To prevent the central trunks from deforming when passing through the undermined array, as well as to avoid activating the processes of shifting and settling of the overlying strata of rocks during the cleaning works, it is necessary to proceed from the condition that there are no processes of displacement and settling in the center of the excavated areas within the limits of safety pillars. The dimensions of said excavation areas determine the outcome of the following relationships:

ctg (v + .q

H

- coset-siiu-ctgCv, + eQ

40

H

ctgCfr- “O

cos "t, + sinw-ctg ()

five

13 2 (H + 1G sinrf) -ctgV ,; C 2 (H-lj-siiuO-ctgVj,

where and 12 - respectively, the size of the excavation area in terms of its center for the fall and rebellion, m; l 1, and 1 - respectively full

dimensions of the excavation site along the strike from the side of the fall and uprising, m;

H - the angles of complete displacements H - the depth of the central

parts of the excavation area, Mj eL - dip angle.

1

Fig.e

Figm

Compiled by S.Ul Nov. Editor O.Golovach Tekhred L.Oliynyk Proofreader I.Musk

Order 1042

Circulation 398

VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5

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Claims (1)

Claim A method for protecting vertical trunks, including opening the mine field with flank trunks, conducting preparatory workings, forming safety pillars around the flank trunks, working out the strata within the safety pillars of the central bends, holding central trunks after the end of the shift of the underworked rocks, characterized in that, in order to increase the operational stability of vertical trunks and reduction of mineral losses, safety pillars around the flanks in form size l _h = N + 2 L _o ", the central pillar shafts at ucha10 stke mine field, measures koto: cerned determined from expressions l _{= n.} CtgO, + ot) _________. ¹ cos d. -Sin oi ctg (Ψ, + oQ ' ^{January 15} = Η -_____. ________.. 1 cos 4 + sin J. ctg (4 _t -o <) 'lj = 2 (H + 1 _1. Siiw) ctgVj; 20 1 ₄ = 2 (h - l _t · sinet) · ctg'Ц,; de If - the size of the excavation site from its center to the boundaries of the fall, m; 25 1 ₄ - the same, in rebellion, m; ' 1 ^ is the total size of the excavation section along strike along the side of the dip, m; 1 ^ - the same, from the side of recovery 3Q, m; H - the depth of the Central part of the excavation site from the surface, m; “Ί - angle of incidence, degrees; 35 ^Wl ',, ^ and the angles of complete displacement, then after carrying out the indicated central shafts, the entire mine field, including the safety Figure 1 Figure 4