RU2303132C1 - Method for bedded deposit development with heading-and-stall method - Google Patents

Abstract

FIELD: mining, particularly methods of underground mining for brown or hard coal.

SUBSTANCE: method involves dividing working area into panels by excavating panel mining, belt and ventilation entries and inclines; performing of advance upper bed mining and retreat lower bed mining; connecting mining entries at different deposit beds with inclines. Belt entries are formed only in lower bed. Mining and ventilation entries made in upper bed are shifted with respect to corresponding lower bed entries for distance equal to half of panel width. As second working fronts of lower and upper beds cross each other excavation of upper beam semi-panel superposed with working panel of lower bed in plan view is stopped up to time of second working front of lower bed moving-off along with lower bed cutting continuing. Upper bed excavation is continued as the second working front of lower bed reaches distance of not less than 0.2 of lower bed depth. Ore is conveyed from upper bed and filling material is supplied to goaf via belt and mining entries formed in excavated adjacent panel correspondingly. Ore from mining entry of upper bed is conveyed to that of lower bed along periodically passable inclines and from mining entry of lower bed to belt entry via ore passes, wherein ore conveyance is began from ore excavated from upper bed. After chamber mining and new incline cutting filling material for mined-out upper bed chamber filling is conveyed. Ore produced from upper bed may be transported by means of conveyer installed in mined-out lower bed chamber. Ore is transferred from mining entry of upper bed to conveyer and in belt entry of mined-out panel via ore passes. Inclines may be arranged transversely to panel entries.

EFFECT: decreased volume of preparatory work and increased cutting rate.

4 cl, 2 dwg

Description

The invention relates to the mining industry and can be used in the development of shallow formations with a chamber system by the opposite fronts of treatment works, including adjacent formations.

A well-known panel layer preparation method for direct stockpiling of panels, including driving drifts of a panel drift, namely a conveyor drift for ore delivery, a transport drift (one or two) for auxiliary vehicles and people delivery, as well as launch drifts for turning combines (Underground mining technology potassium ores / M .: Nedra, 1977. - C.35, Fig. 9, a).

The disadvantage of this method is the large width of the conveyor drift, combined with the excavation, as a result of which there is a need for its fastening, and its location in less stable formation rocks leads to a decrease in service life, in addition, the working conditions of the conveyors are worsened due to the folding of the formation.

The closest in technical essence and the achieved result to the proposed technical solution is a method of preparing a mine field, which consists in opening the working panels with field conveyor and transport drifts. Panel dredging drifts pass in the middle of the panels, and at their borders there are panel ventilation drifts. The location of the same panel workings is coaxial. Direct and reverse mining procedures (Guidelines for mining at the mines of the Verkhnekamsk potash deposit / Ural branch of VNIIG. - M .: Nedra, 1992. - P.41-42, Fig. 1.16).

However, the mined-out space combined in one line on several layers leads to an increase in deformations of rocks and the earth's surface and the need to apply measures to protect undermined objects. During the simultaneous development of two layers with different minerals, it is necessary to drill two or three conveyor drifts on the panel for transporting various types of ore and filling material (for example, when mining the carnallite layer B in the Verkhnekamsk potash deposit, the laying is an element of the development system).

The technical result of the invention consists in reducing the volume of mining and preparatory work, creating favorable conditions for undermining natural objects, buildings, structures, ensuring the continuity of treatment work in the mountainous area, as well as the possibility of simultaneous mining of formations with various minerals.

The specified technical result is achieved by the fact that in the method of developing reservoir deposits using a chamber system, including dividing the excavation section into panels, sinking panel extraction, conveyor and ventilation drifts, slopes, direct and reverse order of working panels, the upper layer is worked out in the direct order, and the lower - in the reverse order, and the excavation drifts on opposite layers are connected by slopes, while the conveyor drifts are passed only along the lower layer, and the excavation and ventilation drifts are not the upper layer is shifted in plan by half the width of the panel relative to the drifts of the lower layer of the same name, and at the moment the front of the treatment works crosses the lower and upper layers, mining on the half-panel of the upper layer, combined in plan with the working panel of the lower layer, is suspended until the front of the works is removed the lower reservoir, which continues to be worked out, and the development of the upper reservoir is resumed when the removal of the front of treatment works is

l≥0.2 N,

where H is the depth of the lower reservoir.

At the same time, ore is transported from the upper seam and filling material is fed into it, respectively, via the conveyor and excavation drifts of the spent adjacent panel, while ore from the excavation drift of the upper seam is transported along periodically passable slopes to the excavation drift of the spent lower seam and by ore pass from this drift to the conveyor, moreover, along the slope, first transported ore mined in the upper seam, and after mining a number of chambers and driving a new slope - filling material for mortgage ki spent chambers on the upper layer. Ore mined in the upper seam is transported along the conveyor installed in the spent chamber of the lower seam, and ore is transferred from the excavation drift of the upper seam to the conveyor, and onto the conveyor drift of the spent panel by ore passes. Slopes are perpendicular to the panel drifts.

The invention is illustrated by the drawings: in Fig.1 is a diagram of mining operations, in Fig.2 is a section along aa, where 1 is a dredging drift of the upper layer; 2 - bias; 3 - ore passing; 4 - excavation drift of the lower layer; 5 - panel ventilation drift; 6 - treatment chamber; 7 - a blocked camera; 8 - direction of movement of work on the mine field; 9 - the direction of movement of the front of sewage treatment in panels; 10 - conveyor drift; 11 - the border of the panel on the upper layer; 12 - the border of the panel on the lower layer.

The method is as follows.

Testing 8 of the excavation section is carried out simultaneously on two layers; the upper layer is worked out in the direct order, and the lower one - in the reverse order. Initially, the excavation section is divided on the panel by sinking the panel excavation 1, 4, conveyor 10 and ventilation drifts 5. The drifts on the upper and lower layers are displaced in plan by half the width of the panel with respect to the drifts of the lower layer 11, 12, and the conveyor drift 10 pass only in the lower layer. Mining drifts 1, 4 on the layers are connected by slopes 2.

At the moment of crossing the front of the treatment works in the lower and upper layers, the development of the treatment chambers 6 on the half panel of the upper layer, combined in plan with the lower one, is stopped until the front of the works in the lower layer is removed, while continuing to work out the second half panel. Such a temporary stop of the front of the treatment works on the upper layer avoids concentration of loads when two pressure zones are applied from the moving fronts of the treatment works and eliminate the risk of sudden destruction of the rock structures.

The development of the upper reservoir is resumed when the removal of the front of the treatment work 9 is

l≥0.2 N,

where H is the depth of the lower reservoir.

For the transportation of ore from the upper seam and the filing of filling material onto it, conveyor 10 and excavation drifts 4 of the spent adjacent panel are used. To transport ore from the excavation drift of the upper seam 1, slopes 2 periodically pass to the excavation drift of the spent lower seam 4, as well as ore passes 3 from this drift to the conveyor drift 10. The inclinations 2 are placed perpendicular to the panel drifts so that they do not cross the treatment chambers.

On slope 2, first transported ore mined in the upper layer, and then after mining a number of chambers and driving a new slope - filling material for laying spent chambers 7 on the upper layer.

To transport the ore mined in the upper seam, you can use the spent chamber 6 of the lower seam, in which the conveyor is installed, while ore discharge 3 passes to convey the ore from the excavation drift of the upper seam to the conveyor installed in the chamber, as well as to the conveyor drift of the spent panel.

Using the proposed technical solution allows to increase the length of the edge part of the temporary trough of displacement by the width of the half-panel and significantly reduce the amount of deformations (inclination, curvature, horizontal deformations) of rocks, including the water-proof thickness and the earth's surface, creates more favorable conditions for working out of natural objects, buildings and structures .

In addition, a temporary stop of the treatment front on the upper layer allows avoiding concentration of loads when two pressure zones are applied from the moving front of the treatment and eliminating the risk of sudden destruction of rock structures, which increases the safety of mining operations.

The method ensures the continuity of mining operations in the mining area during the intersection of the fronts of work on the seams.

The proposed method for mining strata with various minerals allows you to separate three conveyor lines in space (two ore and one filling) and use the conveyor drift of the spent lower layer to transport ore mined in the upper layer, and the excavated drift of the spent lower layer - for transporting filling material into chambers 7 on the upper layer. Due to this, a reduction in the volume of mining and preparatory work is achieved.

The proposed method allows to reduce the volume of mining and preparatory work, to create favorable conditions for the underworking of natural objects, buildings, structures, to ensure the continuity of treatment work in the mountain area, as well as to carry out simultaneous mining of formations with various minerals.

Claims (4)

1. The method of development of reservoir deposits by a chamber system, including dividing the excavation section on the panel by driving panel excavation, conveyor and ventilation drifts, slopes, direct and reverse order of mining panels, characterized in that the upper layer is worked out in the direct order, and the lower one - in the reverse order, and excavation drifts on opposite layers are connected by slopes, while conveyor drifts pass only along the lower layer, and excavation and ventilation drifts on the upper layer are displaced in plan by half Well, the width of the panel in relation to the drifts of the lower layer of the same name and at the moment of crossing the front of the treatment works on the lower and upper layers, the development on the half-panel of the upper layer, combined in plan with the working panel of the lower layer, is suspended until the front of the works on the lower layer, which continues to be worked out, is removed, and they resume mining of the upper layer when the removal of the front of treatment works is l≥0.2 N, where H is the depth of the lower reservoir. 2. The method according to claim 1, characterized in that the ore is transported from the upper seam and the filling material is supplied to it, respectively, by conveyor and excavation drifts of the spent adjacent panel, while ore from the excavation drift of the upper seam is transported along periodically passable slopes on excavation drift of the spent lower seam and through ore passes from this drift to the conveyor, and first of all the ore mined in the upper seam is transported along the slope, and after mining a number of chambers and driving a new slope - Adhesive material for laying spent chambers on the upper layer. 3. The method according to claim 1, characterized in that the ore mined in the upper seam is transported via a conveyor installed in the spent chamber of the lower seam, and ore is transferred from the excavation drift of the upper seam to the conveyor and to the conveyor drift of the spent panel through ore passages. 4. The method according to claim 1, characterized in that the slopes are perpendicular to the panel drifts.

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