SU1761953A1 - Method of working steep coal bed - Google Patents

Abstract

Use: mining, to increase work safety and improve working conditions. The essence of the invention: on the rise of the reservoir in the prepared strips, rising workings are carried out with deviation from the boundary of the strip from the side of the developed strip. Of the rising workings, they are carried out up to the indicated boundary of the coupling at a distance equal to the step of simultaneous blasting of coal. Drilling and charging of bore holes from the rising workings are carried out simultaneously in the working and adjacent to the prepared strips. After the release of the carbonated coal, the spent space is laid. 3 il.

Description

The invention relates to the mining industry and is aimed at improving the development systems of steep and sloping coal seams with the laying of the goaf.

There is a method of developing steep coal seams, which includes preparing the excavated floor with strips for rebellion with carrying out rising workings and slinging of them for raising the seam in the prepared strips, drilling and loading blastholes at a step of simultaneously striking coal and digging coal in the worked out strip for rebellion within its limits boundaries with coal storage in the developed space.

The disadvantage of this method is the inadequate safety of work in the downhole and the complexity of the construction of wooden organ lining.

The aim of the invention is to improve work safety and improve working conditions.

The goal is achieved by the development of steep coal seams with the preparation of excavation floor strips for the uprising, including carrying out of rising workings and squeezing of them on the rise of the reservoir in the prepared strips, drilling and loading of boreholes on the step of simultaneous blasting of coal and excavation of coal in the developed strip on the uprising within its boundaries, with the coal being stored in the developed space, the rising production in each prepared strip is carried out with deviation from its boundary from the side th band sboyka conducted to said boundary at a distance from each other equal to step simultaneous breaking coal, drilling and charge zhanie

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blast holes are made simultaneously from the rising workings in the developed strip and in the adjacent prepared strip after the release of coal, the spent space is laid.

FIG. 1 shows a flow chart for the development of a steep formation by the proposed method; in fig. 2 - the same, with single sublevel drifts; in fig. 3 - a fragment of a clearing site.

The steep coal seam (excavation field, block, section) according to the proposed technology is prepared by a ventilation drift 1 and a haul (not shown). The floor is divided into several sub-floors (3–4) by intermediate (sub-level) drifts 2, 3, 4, in parallel with which drifts 5–6 can be positioned higher by 3 meters. Drives 2-3 with drifts 5–6 are located higher by 3 The plumes 2-3 with drifts 5-6 are connected by taps 7.

Each sub-floor is divided into several excavation strips, worked through the uprising; the parameters of the strips (height and width) are determined by the value of the sustained roof span of the formation. Within the contour of each excavation strip within the substage, rising production 8, which is a well, furnace, split production, etc., is conducted. The development 8 of each excavation strip is carried out near the contour boundary of the strip from the side of the developed space and connected by taps 9 with the contour of the preceding strip.

Excavation of coal in the bands is carried out by drilling and blasting with the storage of broken coal. The drilling and loading of bores 10 and 11 are made from reevenging openings 8 or from tailings 9. Tunneling overhead shelves can be used.

Boreholes 10 are drilled from riser 8 located in the adjacent (adjacent) strip. Holes 10 and 11, depending on the thickness of the reservoir, are drilled either horizontally or in the form of a fan located in a plane normal to the reservoir,

The distance between collisions 9 on the uprising of the reservoir is assumed to be equal to the step of simultaneous coal blasting, determined by the conditions of stability of the roof of the reservoir in strips, conditions of rational crushing of coal, etc. (This condition is dictated by the fact that after blasting holes and partially

The first release of the fenced off coal. 12 The bottom of the strip was ventilated with a continuous jet of air due to a general mine depression. After the coal has been crushed, the coal is unloaded from it in the entire contour of the strip, hermetic lintels 13 are erected on the tusks 7 and 9, and the strip is filled with a hardening pad.

Cleaning and filling works at the excavation site are organized in such a way that in one sub-floor coal was excavated (breaking), in the other sub-floor unloading of the broken coal from the strip, in the third - the bookmark was kept, in the fourth - the mortgaged chamber was maintained until the required strength of the backfill was set array.

After the filling mass in the previous strip gains the necessary strength, ensuring its stability and sufficient load-bearing capacity, which can resist the lowering of the roof of the reservoir while working out the next strip, work is carried out in it to prepare it for cleaning works and

others).

Claims (1)

Conditions of application of this technology: areas of medium-sized seams with stable roofs, located in pillars under protected industrial and civil construction objects. The invention The method of developing a steep coal seam, including the preparation of excavation floor strips for the uprising carrying out of rising workings and slingings of them in the prepared strips, drilling and loading blastholes on the step of simultaneous blasting of coal and excavation of coal in the developed strip on the uprising within its borders with the trading coal in the developed space and its subsequent release, characterized in that, in order to increase the safety of work and improve working conditions, the rising output in each preparation The casting strip is moved away from its boundary from the side of the strip to be worked out, the connections are carried out to the indicated boundary, at a distance from each other equal to the step of simultaneous coal blasting, drilling and drilling of drill holes are carried out simultaneously from the rising workings in the strip being drilled and in the adjacent with it, a prepared strip, and after the release of coal, the laying of the goaf is made. / / J 8 12 8 9 77777 77 ////// 7777777p77l777i7Wb T TTTTf xv x x X 12