SU1687782A1 - A method of extracting natural soil - Google Patents

Abstract

The invention relates to the excavation of pillars crushed by the weight of overlying rocks. The purpose of the invention is to reduce the labor intensity by reducing the amount of preparatory work. Pass the transport and drilling workings. Drilling of wells from drilling workings under the bottom of pillars to the upper boundary of pillars is carried out. At the bottom of the pillars, insulating hermetic pads are formed from the solid solution by pumping it into the wells, which are cased with pipes up to the soil of the pillars. Along the perimeter of the site form a side that exceeds the mark of the site. Then the wells are cased along the entire length. The upper section of each well is cased with perforated pipes. The leaching fluid is fed into the destroyed pillar array and the mineral is irrigated by it by injecting said fluid into the casing, which is sealed in contact with the walls of the wells. The mineral-rich leach fluid is collected on an insulating pressurized area in the bottom of the pillars and discharged in an organized manner into transport workings. 3 il. Yo

Description

The invention relates to the mining industry and can be used when excavating pillars crushed by the weight of overlying rocks.

The purpose of the invention is to reduce the labor intensity by reducing the amount of preparatory work.

Figure 1 shows the contour of the ore heap and drilled wells with casing; figure 2 - section aa in figure 1, fig. 3 shows a section BB in FIG.

The method is carried out as follows.

Under the lower part of the crushed ore pillar 1, parallel to the row of crushed pillars and shifted toward the ore body slope, as shown in FIG. 1, proch dates a field transport excavation 2, from which an uprising 3 passes, forming it in the lower part of the ore rear sight 1 c. receiving chute 4; Then, from the rising 3 below the soil of the ore pillar 1, parallel to the fall of the ore body, under the bottom of the pillar, a drill hole 5 is passed, from which upward wells 6 are drilled through the interlayer 7 into the ore target zone

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rtu its upper boundary. The ascending wells 6 are lined with pipes 8 and the hardening solution and the leaching fluid are fed through them in the following order. First, the casing pipes 8 are pushed into the wells 6 to the ore pillar soil 1 and a hardening fluid is pumped through it, which, spreading over the soil surface of the ore pillar 1, creates a continuous impermeable layer - an insulating hermetic pad 9 from the hardening solution. At the same time, to prevent the leaching fluid from spreading beyond the ore pillar 1 along the perimeter of the pressurized platform 9, by pumping the injection (hardening) solution, a rim 10 of bonded rock pieces protruding above the surface of the pressurized platform 9. Then the wells 6 are surrounded by pipes 8 over the entire their length, the leaching fluid is fed into the destroyed mass of the ore pillar 1. Uniform irrigation of the mineral by the leaching fluid is carried out through the first casing link pipes 8 in the upper section 11 of the wells 6, made with holes 12. Next, the leaching fluid, penetrating the ore, collects on the inclined surface of the previously created pressurized platform 9 in the bottom of the ore pillar 1 and flows down the inclined platform 9 already enriched by the useful component into the receiving chute 4 and transport production 2.

To prevent the leach solution from entering the wellhead, it is installed in the zaor between the wall

borehole and casing rough rubber gaskets.

Claims (1)

Claims method of excavation of pillars, including carrying out of transport and drilling workings, drilling wells, forming an insulating sealed platform from a hardening solution in the bottom of the pillars, feeding the leached liquid into the destroyed pillar array, irrigating the mineral with leaching liquid. sealed site at the bottom of the pillars and organized removal of the enriched leaching fluid, which is Neither laboriousness due to the reduction of the volume of the prepared works, drilling development takes place under the bottom of the pillars and drilling wells from it to the upper boundary of the pillars, forming an airtight platform from the hardening solution in the bottom of the pillars, at the same time, a rim is formed around the perimeter of the site, then the wells are planted along the entire length, with the upper part of the wells being planted with perforated pipes; The treatment fluid and irrigation of the mineral by it is carried out by injecting said fluid into the casing, which is sealed at the contact with the walls of the wells. 6 1 Figg ft P