SU737628A1 - Method of mining mineral deposits - Google Patents

Description

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The invention relates to the mining industry and can be used in the extraction of minerals by blocks (chambers, panels, poles) with drilling and blasting blasting on the compensation cavity with the subsequent release of the mineral and filling the developed space with a hard bookmark.

There is a known method for developing powerful ore deposits where compensatory cavities 1 pass.

The disadvantage of this method is that all operations associated with the formation of a compensation cavity in the array are laborious and inefficient.

In addition, there is a known method for developing mineral deposits, including installing the formwork in the developed space in the form of rubberized cylinders filled with gas or liquid, on the bottom plane to form a compensation cavity, filling the developed space behind the formwork with a hardening mixture, after the bookmark is solidified, the formwork is removed and produced t drilling and blasting breaking formed by the compensation cavity 2.

The disadvantage of this method. its application is relatively narrow (only for low-thickness formations).

The purpose of the invention is to expand the field of application of the method and accelerate the hardening of the bookmark.

The goal is achieved by creating a compensation cavity between the formwork and a part of the bottom plane by layering the worked-out space, and as the mixture hardens, the formwork is moved up along the bottom plane, and an electric current is passed through the tab in the area of the formwork. In addition, as the spent space is laid, the compensation cavity is filled, for example, with water, which is removed in front of the junk mineral.

FIG. Figure 1 shows the projection onto the vertical plane of the developed section of the field; in fig. 2 shows section A-A in FIG. one.

Claims (2)

2 (j Division of the ore body into the floors, as well as cutting of blocks (chambers, panels, pillars) in the floor is done by any known option. The first block in the floor is also tested in one of the known ways. The subsequent blocks are worked out in the proposed way, In the block Mining preparation and rifled excavations are carried out according to a known chosen scheme for mining this field. Then, before starting the filling operations, formwork in the form of a shield 1 is placed in the used space in the first block. It is fenced off part of the waste space adjacent to the bottom plane 2. Then, the hardening tab 3 is fed into the waste block so that it fills the waste space 4 and does not enter the compensation cavity 5 formed between the shield 1 and the part of the bottom plane 2. In this cavity 5 receives filtering water 6 from filling material through leakages between shield 1 and bottom plane 2. Specially water can be supplied from the pipeline in order to reduce the drift of the hardening tab 3 into the compensatory cavity 5. The filling of the developed space is made in layers with a height of 1–3 m. After filling the developed space into the accepted height of the layer, the laying time is set to a strength of 2–5 kg / cm and the shield 1 is lifted by an amount approximately equal to height of The next layer of the developed space is filled with 4 tons: e | with the laying tab 3, then the time is given for the setting of the tab in the new layer, after which the shield 1 is raised to form the next layer. According to the above-described technology, the entire developed space 4 is filled, and between the shield 1 and the bottom plane 2 a compensatory cavity 5 is formed, filled with water. B. After the bedding has hardened and will have the required strength of 20–80 kg / cm 2, water from the compensation cavity 5 is removed by known methods, for example, through drilled wells by gravity or explosion of explosives in the wells drilled in the lower part of the compensation cavity, or pumped out pumps. In order to accelerate the hardening process of the laying in the layers, the shield 1 can be equipped with electrodes 7 through which electric current is applied. The closure of the electrical circuit is a hardening tab in the immediate vicinity of the shield. Under the action of an electric current, the filling material dehydrates, condenses and hardens in a much shorter period of time. In addition, in order to increase the stability of the compensation cavity throughout the hardening of the filling material, it can be filled with crushed ore during its formation. The removal of the crushed ore from the compensation cavity is carried out before the ore is crushed in the block. After the compensation cavity is freed from the filler (water or crushed ore), the ore is crushed in the block. The compensation cavity is used as an additional exposed surface and space to accommodate the ore crushed and exploded. The proposed method can be used in the development of powerful fields, when the formation of a compensation cavity of a great height, for example, 10-40 m, and a cross section of 2-6 m and more is required. Claim 1. A method for developing mineral deposits, including installing a formwork in an open space at the bottom plane to form a compensation cavity, filling the developed space behind the formwork with a hardening mixture, drilling and blasting breaking into the compensated cavity after hardening the bookmark, and releasing broken mineral, different In order to expand the area of application of the method, a compensation cavity is formed between the formwork and part of the slab plane by layered bookmarks of the developed space and as the mixture hardens, the formwork is moved upwards along the bottom plane. 2. A method according to claim 1, characterized in that, in order to accelerate the hardening of the bookmark, an electric current is passed through the tab in the area of the formwork. 3. A method according to claim 1, characterized in that as the space is laid out, the compensation cavity is filled, for example, with water, which is removed before the mineral is crushed. Sources of information taken into account in the examination 1. USSR author's certificate number 403853, cl. E 21 C 41/06, 1969. 2. USSR author's certificate number 6050j) l, cl. E 21 C 41/06, 1974 (prototype).