SU861606A1 - Method of mining thin steeply deeping veins - Google Patents

Description

one

The invention relates to the underground mining of ore deposits and can be used in the development of low-power (0.6-1.0 m) steeply dipping veins with insufficiently stable

enclosing rocks.

, I - There is a known method of developing thin veins with a separate recess, which “€ work out with a scoring capacity of 1F1X rocks used for bookmarks 8; the worked out DJ space”

The disadvantage of this method is high, the laboriousness of the work on the laying of the developed space.

There is also known a method of developing 1-hoped | cx fields with a capacity of up to Э-4 m with the maintenance of the worked-out space with a spacer support and partial laying.

The disadvantage of this method is the high cost of maintaining the space developed.

The purpose of the invention is to reduce the complexity of the work and the cost of mining.

This is achieved by the fact that the development of the block with simultaneous fastening is carried out by sub-plugs, a partial laying of the developed space by horizontal stripes is carried out with enclosing rocks, which is obtained

10 when penetrating the underlaying drifts in the recumbent side by blasting horizontal holes drilled from the rebels and yushi, which are held at the elevation of the sublevel drift in the central part of the excavation site, and the ore is delivered to the ore floor in the sub-floor by laying the underlying substage whose surface is leveled cement-sand mortar.

Claims (2)

 FIG. 1 shows the testing of a block, b in the first substage: in FIG. 2 the same, in the second substage. 38 Preparation of the excavation section consists of carrying out haulage 1 and flanking rising 2. On the other flank of the block, an accompanying rising 3 is held in parallel with the clearing notch. The block’s direction, exit from the conditions of scraping, is taken within 20-25 m. up horizontal layers with installation in each layer of the spacer support 4. The beaten off ore under the action of its own weight moves down and out of the cleaning space through removable hatches 5 mounted in the roof of the haulage roadway. During the excavation of the upper part of the substage at a height of 1i i from the roof of the drift in the rocks of the recumbent block, a niche 6 is formed. From it, as well as from the rising 2 and 3, drill 7 holes for the first subsurface drift by the time the substage is completed. Before charging and blasting, boreholes 7 dismantle the exit hatches 5 and cover the hatch holes in the roof of the haulage drift. The holes of the boreholes 7 explode, and the loose host rocks fill a part of the cleaning space, l in height, between the roof of the haul road and the lower mark of the first subsurface drift 8. After leveling the bookmark and creating a gradient of 4-5 on its side, flooring 9 is arranged on its surface by gunning with cement-sand mortar. In the process of excavating the second substage, the ore is fed to the formed flooring 9 and through it the scraper 10 is delivered to the ore-discharging department of the rising 2. The second substage is excavated with the installation in each layer of the spacer support 4. In the process of excavating the upper part of the substage at a height from the ground The first sublevel drift in the lying side rocks make up a niche b. In the future, all operations for the removal of the substage are repeated. At the same time, before the charging and blasting of holes 7 at a distance h from the soil of the second sublevel drift, a floor is laid on the spacer, and the charges of holes 7 under the rock are placed as a bookmark. The proposed method of development will reduce costs and improve the efficiency of working steeply dipping low-power veins with insufficiently stable enclosing rocks. Claims of the Invention The method of developing low-power steep-grades lived with the maintenance of the developed space with an expansion bolt installed as the ore was dredged and partially put into place, including the penetration of ore blocks, cutting the ore horizontally in 1 layer, cleaning the rock into the developed space and delivering the ore with seals and ore pulping to do the other. By the fact that, in order to reduce the laboriousness of the work and the cost of excavation of the mineral, the block is worked up with simultaneous fastening by sub-floors , partial laying of the worked-out space with horizontal stripes is carried out with enclosing rocks obtained when sinking subsurface drifts in the recumbent side by blasting horizontal holes drilled from the rebels and a niche that passes at the subsurface drift mark in the central part of the excavation site, and the ore is delivered to the ore passes in the sub-floor, it is produced according to the tab of the underlying sub-floor, the surface of which is leveled with a cement-sand mortar. Sources of information taken into account in the examination 1.V.menit.R. The processes of underground mining in the development of ore deposits. M., Nedra, 1978, p. 459-462. 2. Kaplunov R.P. Cheremushentsev I.A. Underground mining of ore and placer deposits. M., Higher School, 1966, p.341 (prototype. C / /////////// 77 77 //////// // // L -iA /. ft-O / i.: .o P.: .9 TH