Method of open working out of steep deposits with internal spoil disposal

FIELD: mining.

SUBSTANCE: method in which the quarry along the length is divided by the lines, of which the first is worked out to a target depth with an external spoil disposal and working out of the subsequent ones is carried out using an internal spoil disposal, placing the overburden in the mined-out space of the adjacent line with the common formation of the dump tiers with the development of mining work. And simultaneously with the start of mining operations in the quarry of the first stage within the quarry of the second stage along the deposits the front quarry is built with angles of the slopes of sides close to the angles of reclamation, the cross-overs are located in it for providing cargo communication of the upper working horizons of the quarry of the first stage with the surface, with the reduction of mining operations in the quarry of the first stage on its longitudinal side the loop cross-overs are made adjacent to the bottom of the quarry in the area of the end side, which is formed with a slope towards the temporary side, marking the limit of the quarries of first and second stage, when achievement in the mining operations in the quarry of the first stage of the current depth. The separation of the sides of the front quarry is carried out, turning them into working, and after complete working out the reserves of the quarry of the first stage the working out the reserves of the quarry of the second stage is carried out, while linking its main openings to the main openings of quarry of the first stage in the locations of the loops, the inner dump in the worked-out area of quarry of the first stage is formed as inclined and horizontal tiers, at first directly with the surface from the side not occupied with main openings, the inclined tier is made with bulldozers with width of the platform on top equal to zero, and then using a draglines it is extended by the amount of boom extension, after this the horizontal tiers are dumped in series from the bottom up from the loop cross-overs with the high ensuring their sustainability, to complete formation of the inner dump.

EFFECT: decrease in the distance of inner transportation of overburden from the working area to the inner dump.

8 dwg

 

The invention relates to an open development of mineral deposits, and more particularly to an open development steeply sloping fields with the use of internal reserves.

The known method [1] open pit steeply sloping fields with the use of internal reserves.

Mining with this method begins with the construction of the career of the first stage at full depth with moving waste rock in external dumps. After creating the career of the first stage is transferred to the second stage is to conduct operations in the career of the second stage. Mining activities begin to develop in the direction of the end throughout the depth. In backordered developed space create internal dump, which develop after podvigina ledges working Board. This blade in place further overburden. Transportation of the mineral and overburden in the system with internal stacking produced by road transport. Freight transportation communication working Board with layers of inner blade carried out by the transport berms located on one of the longitudinal outside of the pit.

On the same Board is satisfied with the internal semi conventions for delivery to the surface of the fossil. In the case where the height of the shaft tier exceeds the height of the ledge, these conventions will also be used for freight transportation communications workers of ledges with tiers of the blade. Prestaciones congresses due to the fact that as podvigina front works congresses flooded inland dumps. Therefore, transport outside of the Board to replace retiring new semi congresses. The life of a semi congresses at various horizons varies: in the upper horizons new conventions create through 1-1,5 years, on the bottom after 6-8 months.

However, due to the large additional volumes of Stripping on the device exposing openings, this method is not used in the development of steep deposits. Its scope is limited to relatively shallow occurrence of a useful mineral, when the angle of incidence equal to or less than the angle of maturity transport pit, or when a constructive angle side more angle on the conditions of sustainability.

The closest technical solution is the way to develop steep deposits queues using internal stacking [2]which career field is divided by the length of the queue. The first and foremost being the full depth and hauling waste rock to external dumps. The opening of the first stage is the capital of trenches mixed the CSOs of inception: two or three of the upper horizon opened trenches external location and the lower horizons - trenches internal laying. After testing the first stage of the work included the adjacent turn, adjacent to the worked-out space of the first stage. The second stage is being moved overburden in the mined-out area of the first stage.

Opening business horizons and their freight transportation bond with the surface and internal tiers of the blade through capital tranches internal laying, have repaid the longitudinal outside of the pit.

However, this method also has significant drawbacks. The main drawback is significant (2-3 times) to increase internal transport overburden compared to the internal volume of traffic at the external dumping. It is because of overburden of upper horizons career of the second stage are carried at the lower horizons of the career of the first stage, and overburden lower horizons career of the second stage is located in the upper horizons career first queue.

The invention solves the problem of reducing volumes of traffic in terms of surface mining steeply dipping deposits with internal dumping.

The technical result to be obtained by use of the invention is reduced and the internal volume of the transport of overburden by reducing the number of revealing the workings and improvement schemes of their location at the opening of business horizons quarries of the first and second queue.

This technical result is due to the fact that in the known method of surface mining of steeply dipping deposits with internal dumping, in which the pit length is divided into a queue from which the first practice to the design depth with external stacking, and the development of the subsequent turns are using internal dumping, placing Stripping in the mined-out area adjacent turns, simultaneously with the beginning of the development of mining operations in the career of the first stage within the career of the second stage along the deposits build good careers with angles of slope close to the corner of maturity, there have conventions to ensure freight transportation links top business horizons career the first phase with the surface, as the reduction of mining operations in the career of the first stage on its longitudinal Board suit loop congresses, adjacent to the bottom of the quarry in the area of the end side formed with a slope in the direction of the interim Board, which differentiates career first and second stage, when reaching the mining operations in the career of the first stage current depth

Ht=Nto-Ninh1/h2,

where Nto- the final depth of the pit is the first stage, Nin- depth advanced career, h1and h2correspondingly soon the th reduction of mining in the open pits of the first and second queue, produce separation of the boards, best career, turning them into work, and after full development of the reserves of the career of the first stage produce mining stocks of the second stage, tykwa its opening production from quarry workings of the first stage in the locations of the loops, the inner blade in the developed space career of the first stage is formed in the form of inclined and horizontal tiers, initially directly from the surface side of the Board not involved in revealing the workings, dozer way form an inclined layer with the width of the pad at the top is equal to zero, then using the rope-bucket excavators expand it to the size of the boom, then sequentially from the bottom up with a loop of congresses produce filling of horizontal tiers of height, to ensure sustainability, to complete the formation of the inner blade.

This set of essential features of the proposed method will reduce the amount of Stripping activity associated with the additional spacing of the pit required for revealing the workings, and significantly reduce the transportation distance overburden career of the second stage in a goaf career first queue.

The method is illustrated in the drawings, in which figure 1, 2, 3 shows the position of the mountains who's work in the claimed method at the time of completion of the advanced career with revealing the workings, ensure the opening of the top business horizons career first stage, figs.4, 5 regulation of mining operations at the end of the spacing flanges advanced career with bringing them to a working condition and full working off the career of the first stage, 6, 7, 8 regulation of mining operations at the time of the final stage of field development and formation of the inner blade based on the sequential filling of inclined and horizontal dump tiers.

The inventive method is as follows. The length of the pit is divided into several queues (in the drawings shows the division into two stages. The first phase 1 work on the project depth with the movement of overburden to external dumps (not shown).

Simultaneously with the beginning of the development of the reserves of the career of the first stage within the career of the second stage 2 along the reservoir 3 (see figure 5) build good careers 4 corners of the slope close to the corner of maturity on the sides which have the congresses 5 (see figure 1) to provide freight transportation communications workers of ledges 6 career of the first phase with the surface. As the reduction of mining operations in the career of the first stage (see figure 4, 5) in its longitudinal Board 7 suit loop congresses 8, adjacent to the bottom 9 a career in the area of the end flanges 10, which is formed with a slant towards the temporary Board is 11, separate career first and second stage. Upon reaching the mountain works in the career of the first stage current depth

Ht=Nto-Ninh1/h2,

where Nto- the final depth of the pit is the first stage, Nin- depth advanced career, h1and h1accordingly, the speed reduction of mining operations in open pits first and second stage, to produce a separation of the boards best career 4, turning them into working 12, and after full development of the reserves of the career of the first stage produce mining stocks career second stage, tykwa thus revealing his generation 13 (see Fig.6, 7, 8) revealing the workings career first stage 8 in the locations of the loops 14 (in the drawings shows one of them). Internal dump in the developed space 75 career of the first stage is formed in the form of inclined 16, 17 and horizontal 18, 19 storeys. Originally directly from the surface side of the Board not involved in revealing the workings, dozer way form an inclined layer 16 with a width of pad at the top is zero. Then using the rope-bucket excavators expand it to the size of the boom, creating a sloping layer 17. After that, sequentially from the bottom up with a loop of congresses 8 produce filling horizontal layers 18, 19 height, ensuring the overall stability, to complete the formation of the inner blade.

The inventive method provides compared to prototype a significant reduction in internal traffic due to the fact that the working volumes of overburden career of the second stage are approaching the height of the tiers of the inner blade on which they reside. In addition, the claimed method provides a significant improvement in the mode of mining operations in the construction of advanced career.

Sources of information

1. Drums V.F. Development of steep and inclined seams open way with the placement of tailings in mined-out space /Wraparound, Piommasow, III //Coal. - 1959. No. 12. - P.12-15.

2. A.S. 337516 the USSR, MKI IS 41/00, the Method of surface mining steeply dipping deposits with internal dumping / Rutkowski astray freight No. 725101/22-3; Appl. 03.04.1961; publ. 05.05.1972, bull. No. 15.- SP.

Method of surface mining steeply dipping deposits with internal dumping, in which the pit length is divided into a queue from which the first practice to the design depth with external stacking and testing of the second stage is carried out with application of internal dumping, placing Stripping in the mined-out area adjacent turns, characterized in that simultaneously with the beginning of the development of mining in which arere the first stage within the career of the second stage along the deposits build good careers with angles of slope, close to the corners of maturity, there have conventions to ensure freight transportation links top business horizons career of the first phase with the surface, as the reduction of mining operations in the career of the first stage on its longitudinal Board suit loop congresses, adjacent to the bottom of the quarry in the area of the end side formed with a slope in the direction of the interim Board, which differentiates career first and second stage, when reaching the mining operations in the career of the first stage current depth
Ht=Nto-Ninh1/h2,
where Nto- the final depth of the pit is the first stage, Nin- depth advanced career, h1and h2accordingly, the speed reduction of mining operations in open pits first and second stage,
produce separation of the boards, best career, turning them into work, and after full development of the reserves of the career of the first stage produce mining stocks career second stage, tykwa its opening production with revealing the workings career first stage in the locations of the loops, the inner blade in the developed space career of the first stage is formed in the form of inclined and horizontal tiers, initially directly from the surface side of the Board not involved in revealing the workings, bulldozer soobobfrirm inclined tier with a wide platform at the top is equal to zero, then using the rope-bucket excavators expand it to the size of the boom, then successively from bottom to top with a loop of congresses produce filling of horizontal tiers of height, to ensure sustainability, to complete the formation of the inner blade.



 

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EFFECT: higher efficiency.

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