SU1481420A1 - Method of preventing rock swelling in mine workings - Google Patents

Abstract

This invention relates to the mining industry. The purpose of the invention is to increase the reliability of the method of preventing stumps in the mine workings (B). Along B 1, drill into the soil B 1 row of well (C) 2 along the line of interface between the walls and soil B 1 obliquely toward its sides. In row C 2 alternate so that C 2 have different angles of inclination and, accordingly, different lengths. The bottom of all C 2 is located at the same depth from the soil B 1 in the same plane. Along the width B 1, one or several rows C 3 are drilled. The C 3 faces are located in the same horizontal plane as C2. In all C 2 and 3, the commutate charges of explosives are placed and they are detonated. The formed cavities and cracks are poured with a fastening solution. Prior to its embedding, the explosive charges are again placed in the formed cavities C 2 and 3 and re-exploded. Due to the hydraulic shock, there is a greater compaction of rocks in the soil with the simultaneous introduction of the solution into the cracks formed. After the binder solution has set in C 2 and after one in C3, located opposite C2 of shorter length, the binding solution is re-injected. 2 Il.

Description

The invention relates to the mining industry and is intended to prevent the formation of rocks in mine workings.

. The purpose of the invention is to improve the reliability of the method of preventing the stump of rocks in the mine workings

Fig. 1 shows a vertical section through a section of production j in Fig. 2 - the production of reinforced zones formed in the soil, plan i

In the drawing there are: horn making 1, passed in pulling rocks, inclined towards the array of well 2, alternating along the working of tilt and length, vertical wells 3, hardened undulating areas 4 of the rock, hardened zones 5 of the rock, cavities 6 formed in soil about

The method is carried out as follows.

Along the production of 1 drill into the soil of a series of wells 2 along the interface of the walls with the soil obliquely toward the sides of the excavation. In the series of well 2 they alternate in such a way that the wells have different angles of inclination and, accordingly, different lengths all wells are located at the same depth from the soil of the mine in the same plane. Thus, long flat and short steeply inclined wells are formed. One or several rows of vertical wells 3 are drilled along the width of the wells with the location of their bottom faces in the same horizontal plane as Inclined wells 2f In all wells 2 and 3, camouflage explosive charges are placed and blasting. In the cavities formed after blasting and cracks, a bonding solution is poured (sand-cement, synthetic resins and). Do not wait for the solution to set, in the hollow cavities formed 2 and 3, the camouflet charges of explosives are again placed (charges of explosives can be placed first in the cavities and then filled in all the voids and cracks with a fastening solution) and the charges are repeatedly detonated in the liquid fastening solution. there is a greater compaction of rocks in the soil with the simultaneous introduction of the solution into the cracks formed. After setting, the bond

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The first solution in all the inclined wells 2 and through one into the vertical wells 3, which are opposite the inclined wells with a greater angle of inclination, again pressurizes the fastening solution under pressure. The solution penetrates into the cavities and cracks formed in the rocks of the soil and, grasping, creates in the soil along the workings of each side of it protective reinforced areas 4, having a wave-like appearance in plan,

The distance between the inclined boreholes 2 and the depth from the production soil is chosen so that after blasting camouflage charges and forcing the fastening solution, a continuous wave-shaped region of reinforced rocks 4 is formed at a predetermined depth from the soil. the concave parts of the protective ziloobrachnyh consolidations. 4 between the hardened zones 5 there are cavities formed in the soil, the walls of which and the contour layer are strengthened. by fastening solution after the second camouflet charge in the liquid phase of the solution,

The goal is achieved by creating solid wavy reinforced areas 4 in the soil under the walls and reinforced zones 5 across the width of the excavation, leaving cavities 6 between them. Such a system of reinforced zones of the rocks allows better resistance to heaving of rocks, because Repeated blasting of camouflage charges with the use of a hydraulic impact not only contributes to the formation of a solid hardened area, but also significantly increases the strength of clay rocks around this area for years. In addition, the waveguide reinforced area 4 is better opposed to the heaving of rocks, so here the arch effect is realized, namely, the reinforced zones 5e are opposed to the reinforced areas 4 that are concave on the production side, they form, as it were, supports for the wave-shaped regions 4 " The remaining unfilled mortar cavity 6 between the reinforced zones 5 serve as a kind of compensation tanks

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for unaccounted displacements of puffing rocks, gradually filling these cavities with regard to their strengthened walls, at the same time cavities 6 create additional unloading in the soil of excavation.

Claims (1)

Invention Formula A method of preventing stump rocks in mines, including drilling into the soil, producing a series of wells located along the interface line of the walls with the excavation soil obliquely towards its sides, blasting in the wells of camouflage charges, characterized in that 0 ° in order to increase the reliability of the method, vertical wells are additionally drilled in the soil, while the inclined wells drill more and shorter compared to each other lengths and different angles of inclination alternate them, and the bottoms of all the wells are located at the same depth, and after the blasting, the bonding solution is poured into the wells and prior to its setting, the blasting is repeated; solution in all inclined wells and in vertical, located opposite inclined wells of shorter length, 6 .: X x X W g /. X : -Hhh, . x-SrfcH0 U, / (x V xy if  H ix xx -. N i g fsf h  l / x X D Xx4 Xv X / X -V Yr xy CH X a , ) T axx