SU1638304A1 - Method of mining thick ore deposits - Google Patents

Abstract

The invention relates to a layered excavation of ore deposits. The purpose of the invention is to increase the safety of work by increasing the stability of ore and artificial outcrops when the ore layers are excavated from top to bottom. The downward layer ore is dug out with the laying of the worked-out space with hardening mixtures. In each layer, prior to its working out with contact with overlying rocks, advance development is carried out parallel to the front of the cleaning works, and a tape ore pillar with a width equal to the width of the columnar pillars (SP) are formed along it, which are increased vertically during the process of excavation of layers specified tape entirely. In the process of mining the layer at the border with the recumbent side, the SP formed during the mining of the overlying layers are exposed. These SCs in the process of threading in the layer above work at the border with the high side working out the reserves of the tape pillar formed above them. These SCs are recovered as the cleaning work of the layer under development is developed. The spent space is laid down through the voids from the SC notch. 2 Il.

Description

The invention relates to the mining industry and can be used for layer-down mining of ore deposits, mainly gently dipping, with laying of the worked-out space under conditions of high mining pressure.

The purpose of the invention is to increase the safety of work by increasing the stability of ore and artificial outcrops when the ore layers are excavated from top to bottom.

Figure 1 shows a vertical section through the fall of the ore body; figure 2 - section aa in figure 1.

The method is carried out as follows.

Layers 1 are cut with the openings 2 oriented across the strike, of which prior to working the layer along the contact with overlying rocks parallel to the front of the clearing works pass advance working 3. The tape pillars 4 are drawn up along the development and the reserves of the layer are worked out pillars 5 under the pillars of the upper layer, thus increasing them from layer to layer to the full capacity of the deposit. Layers are cut so that the calf OJ 00 00

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The home layer corresponds to its interfaced with this layer at the lying side of the deposit of a number of fully formed pillars, which are exposed in the process of working out this layer. A series of columnar pillars 5 formed in the process of layer-by-layer mining are excavated by excavating the reserves of the ribbon pillar 4 located above them, which is equal to the width of pillars 5, after which the columnar pillars are removed. The development of a row of fully decorated column pillars, adjacent to the recumbent side of the deposit, associated with this layer is carried out during the cutting process in the layer. With the development of cleaning works and exposure of fully decorated and developed columnar pillars on the flank of the layer, they are drilled with wells with a diameter of 65-105 mm and beat off with charges of explosives. Breaking is performed either on annular cutting-in cavities or by sectional blasting. Repulsed rock mass shipped.

Through the voids 6 and 7 formed as a result of excavation of the pillars 4 and 5, a hardening bookmark is fed into the spent layer 1. Transport and ventilation connections between the blocks and the layers are carried out through field workings 8 and layer races 9. After hardening the bookmark and setting the required strength the underlying layer is cut and the cycle of work is repeated.

Claims (1)

The invention The method of developing powerful ore deposits, including the extraction of ore layers with the laying of the goaf hardening mixtures, the formation of columnar ore pillars, increasing columnar pillars vertically as the front of the refining works pushes during the mining of ore layers and the subsequent excavation stock pillars, different in order. that, in order to increase the safety of work by increasing the stability of ore and artificial outcrops when mining ore layers from top to bottom, in each layer up to his mining on the contact with overlying rocks passes the advance development parallel to the front of the clearing works and along it is formed a ribbon ore pillar with a width equal to the width of the columnar pillars, which, in the process of removing the layers, make up under it, working out each layer on the border with the recumbent side, expose the columnar pillars formed during the working of the overlying layers, which the cutting process in this layer is worked out on the border with the lateral side by mining the reserves of the ore pillar formed above them, the extraction of the specified columnar pillars is carried out as the cleaning layer of the developed layer develops, and the spent space of the developed layer is laid through excavation columnar pillars. 6 7 / eight Riga.1 8 3 s -5 f FIG. 2