SU1348528A1 - Method of safeguarding mine workings - Google Patents

Abstract

II. “) Pret 1 AI (fire to the area of power loj) - Nok) de, 1a and m. B. ispo.p., for oh | | aiy 11odsrzhn i1em1,1kh ta. lamn workings at 6eciu, iHKOH () H techno, 101NI coal mining by the earth method. J, (Mi juice) cost per unit (}) of cutting the cutting edge at the top of the hardest pumping equipment KJWB-; 1st. () or the walls of the excavation 1 at a distance of 0.15 of its H irin1) 1, cut-off boreholes 2, crossing the entire MOHUiocTii and the contiguous11 and part of the basal bed, II) corner, 1 in the direction, tavy. (The boreholes 2 are charged and blown up. Thus, the lava parts of the lava are cut so that the I, 1, 1, 1, 1, and the shelter, th. D, 1 of the wells 2 lines of the water equal to 1.2 m of the output. Surge of the well before they cross the border of zone II displacement of rocks node, 1st 70 75. IIoc, i.e. detonations in boreholes 2 and () () () forming cut-off slots above and node development, the zone of displacement of rocks passes along the border P. If necessary, cut-off iue, ib is formed and at night development, symmettically | IaIe, 1m in the roof. D, 1a well 3, and the formation of a dyo, 1igelnogo iiuH is equal to 1.6 1iryrina output. 1: .1Г () -, 1Ы, 2 n, t. (L / 4-x} from 00 SP th 00

Description

AND: 5 (.) D) nchch Yie refers to the mountain body and can be 1) used). 1Zonioi for the protection of the presence of lavas at the openings with the aimless technology of coal mining by the underground method.

The goal and,) brethes is the reduction: 1 drag on (() the formation of a segment K) st iue. in on seams with a powerful hard () roof.

On fng. Figure 1 shows a scheme for the maintenance of sewage works (plan view) according to the objectiveless technology; in fig. 2 section A A in FIG. I.

Along the wall of excavation I, located on the side of Biiie.MOMHoro o), the installation chamber is being drilled to cut off the well in the roof 2 and the soil 3. / 1 o from the installation chamber of the well 2 and 3. Thus ({) the organizers are symmetrical in relation to the gelpoin ueinralpoy n. Yoskosg n. Often detachable lue / in in the roof and the soil, at the same time an independent displacement of the genus over (yud) production 4 from the total zones of the shear pad ( sub) excavation 1) space 5- (Wells are drilled until they cross the boundary of the zone) moving rocks P. After the explosions of charges in the wells and the formation of cutting | tse. pad and under jbipa6oTKH zop sdnnzhe 1 and passes along the border 11. L.

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five

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five

wells in the roof are assumed to be 1.2 1nirin1.1 of production and drill with a slope in the direction of the developed space at an angle of 70 70 75. The need for a cut-off nie. ib is also formed in the soil of the workings, in iTOM, the well is drilled with a length equal to Hoii I, (i is the width of the workings.

Formula and Juvenile

1. (duxob oxj) aHbi mine workings, including for. Formation ahead. the seams of the cutting gap by drilling and blasting cut-off wells intersecting all the power of the non-direct and part of the main roof of the node with an angle to the side of the lava, characterized in that, in order to reduce the cost of forming a cut-off slot on the seams with difficult ground to the first roof, .1 I guess 1 at a distance from the wall of the excavation, equal to 0.15 of its length, and drill wells until they cross the boundaries of the | 1 movement of rocks d ,. 1in () nd 1.2 widths 11 |) operation I) D angle of 70-75 °.

2. (lyusob by n. I, and it is distinguished by the fact that in the soil we have f (.) Rm) mk) 1 donolpite, common gap, symmett | ihnuk) slit n roof, and the length of the wells during the formation of donolit. 11) Noah slots take paBiioii 1,) schirp- Hiji production.

ftsz one

Claims (2)

Claim 1. A method for protecting mining, including the formation of a cutting gap ahead of the lava by drilling and blasting shut-off wells that intersect all the direct power and part of the main 15 roofs at an angle to the side of the lava, characterized in that, in order to reduce the cost of forming a cut-off gap in the formations with a powerful hard-to-collapse roof, I lay the wells! at a distance from the wall of the mine, equal to 0.15 of its width, 20 and drill wells until they cross the boundary of rock movement with a length of 1.2 mine widths at an angle of 70 75 °. 2. The method according to and. I, characterized in that in the soil the workings form additional 25 slit, symmetric to the gap in the roof, and the length of the wells when forming an additional gap is taken equal to 1.6 of the width of the output. Trim slots FIG. 1