RU2148712C1 - Method for underground development of ore deposits - Google Patents

Abstract

FIELD: mining industry. SUBSTANCE: according to method, development is carried out by chambers layer by layer from bottom upwards with blast winning of ore and with continuous enlarging pillars of ore over entire height of block. Pillars are covered with isolating material. Working of pillars is performed by periodic blasting of their base from specially driven entries with delivery of broken ore mass to ore chutes. Space created after working-out of ore pillars are packed with filler. EFFECT: higher efficiency. 4 dwg

Description

 The invention relates to the mining industry and can be used in underground mining of solid minerals.

 There is a method of underground mining of ore deposits, including the development of cameras layer by layer from bottom to top with explosive breaking of ore, layer-by-layer building of pillars from ore to the entire block height, fixing the roof of the treatment space with anchor support, isolation of the treatment space, its laying with a hardening mixture, subsequent, after hardening in the chambers , development of pillars with explosive blasting and bookmark.

 The disadvantages of this method are the high cost of drilling and blasting, fastening and laying of the worked out space, clogging of broken ore with a bookmark.

 The purpose of the invention is to reduce the cost of breaking the ore, reducing the clogging of the beaten ore bookmark.

 This goal is achieved by the fact that before laying the chambers with a hardening mixture, the walls of the chambers are covered with insulating material, the pillars are worked out periodically by undermining the pillars of the pillars from specially mined workings, removing the ore mass and thereby causing the pillars to lower, and the filler is placed in the spaces formed above the pillars , which is lowered after the pillars and, after the pillars are completely worked out and the spaces formed are completely filled with filler, the last, if necessary, bay bind with astringent.

 The method is illustrated by drawings.

 In FIG. 1 is a vertical sectional view illustrating the method of claim 1; FIG. 2 is a section along the line AA, in FIG. 3 is a section along the line BB, in figure 4 is a vertical section explaining the method according to p. 2.

 The method is as follows.

 After connecting the drifts (1) and the unit vectors (2) in the base of the block (Fig. 1) work out the layers of the chamber (3). When working out the chambers, the pillars (4) are constantly increasing (leaving in the treatment space). In this case, ore is delivered via ore passes (5) located within the block.

 Before laying cameras on each layer, the pillars are isolated from the bookmarks with insulating material (6). The treatment space is isolated by jumpers (7) and a hardening mixture is supplied, after hardening of which the pillar is essentially cut off from four sides and does not come into contact with the tab.

 After working off the chambers to the entire height of the block, they begin working out the pillars. They are worked out from the special passed workings (8) (it is possible to use hydropneumatic shells during workings) and the unit vectors (2) in the following order. From the unit vectors (2), bore holes (9) are drilled at the base of the pillar and blow them up. The crushed ore is located in the orth (2) and the workings (8). The whole falls to the height of the blasting. The ore is removed and the operation is repeated until the pillar is completely broken.

 At the same time, after each lowering of the pillar, the filler is dumped into the space formed above it (the filler may be waste rock, any other materials that do not require disposal).

 The filler is lowered after the whole and after the pillar is completely worked out and the space is completely filled with filler, the latter, if necessary, is poured with a binder (10). Ore during mining of pillars is delivered to ore passes (11).

 In the second embodiment, the pillars are worked out in layers from the bottom up by blasting the wells (12) (Fig. 4). Ore (13) through cutting (14) is discharged through the outlet (15). After the pillar is completely worked out, the resulting space is laid with a filler and poured with a binder (16).

 According to the third option (conditionally not shown in the drawing), the pillars are worked out by vertical layers by blasting the wells to the full length.

 Using the proposed method will significantly reduce the cost of breaking the pillars and clogging with the tab of the broken ore.

Claims (1)

 The method of underground mining of ore deposits, including the development of cameras layer by layer from bottom to top with explosive breaking of ore, layer-by-layer building of pillars from ore to the entire block height, fixing the roof with anchor support, isolating the treatment space, laying it with a hardening mixture, subsequent to the laying of the pillars in the chambers, processing the pillars with explosive blasting and laying, characterized in that before laying the chambers with a hardening mixture, the walls of the chambers are covered with insulating material, the pillars are worked out, periodically tearing the pillars of the pillars from specially mined workings, removing the ore mass and thereby causing the pillars to lower, and the filler, which is lowered after the pillars, is placed in the spaces formed above the pillars after they are lowered, and after the pillars are completely worked out and the spaces formed are completely filled with filler, the latter, if necessary poured with a binder.

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