SU1500796A1 - Excavated space filling method - Google Patents

Description

The invention relates to the mining industry and can be used in underground mining of mineral deposits with the laying of the goaf. The goal is to increase the bearing capacity of the backfill array. For this up

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filling the strip with filling material in the worked-out area is laid a perforated pipeline. Explosive charges are spread on its surface and the energy is sequentially compacted by exploding explosive charges of the filling mass before it is hardened. Carry out dozakladka hardening mixtures formed after the explosion of the cavities as they are formed. The perforated pipeline with explosive charges is placed parallel to the clearing face in the newly constructed strip. Explosive compaction, dozakladku and hardening of the array carried out in each of the previous strip after filling the filling material of the subsequent newly constructed strip. This allows for 1.5-2 times to reduce the subsidence of the undermined surface and bring the completeness of the bookmark to 95-97% of the extracted reservoir capacity, 3 sludge.

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The invention relates to the mining industry and can be used in underground mining of mineral deposits with the laying of the goaf.

The aim of the invention is to increase the carrying capacity of the backfill array.

FIG. 1 shows a diagram of the lava and the technology of construction of the backfill array on the proposed method; in fig. 2 is a section A-A in FIG. 1 (lava and backfill in the initial position); in fig. 3 - section.

BB in FIG. 1 (position after explosive consolidation and hardening of the backfill array).

The method is as follows.

Preparation of the excavation column is carried out by delineating its ventilation 1 and 2 drip drifts, installing a mechanized stowing complex 3 in a split furnace with a main stowing pipe 4 supports 5 and 6 of the conjunction of the lava with the adjacent workings.

s 1500796

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'The construction of the backfill array (for example, hydro-folding of the goaf) is performed in the following sequence.

As the coal is excavated and the prop 3 moves to the next accepted step of laying (2-3 coal strips taken out by the combine), the spent space is pledged through the main main backfill pipe 4 with side pulp outlets 7. The backfill material is delivered from the surface through the drilled well through the pipeline , 15 laid along the main lines suitable for lava. The stowing pipe 4 has a barrier 8 in the lava, preventing the penetration of the embedding material into the working space.

In the process of laying and forming a new filling strip 9, the injection pipeline 10 is left in the latter. The pipeline is mounted from separate perforated pipes made of low-strength materials (for example, PVC), equipped with distributed charges BB 1 along its length and laid on 30 soil formation or backfill array, depending on the height of the laid out strip.

After erection of the backfill strip 9 in 35, the subsequent strip 12 successively explodes charges of explosives 13 behind the mechanized support. At the same time, reinforcing compositions are injected through the injection pipeline 14 into the filling mass. Injection pipe-. 40 wire is connected to the pressure pipe 15 and the installation 16 for the preparation of reinforcing mixtures.

As a result of the blast wave, a part of the filling material 45 moves towards the developed space and fills the voids formed at the roof 17. The cavities 18 formed (in the place of explosive charges) are filled with hardening mixtures through the blast-damaged sections of the pipeline 14, and through the perforations of the pipelines 14 strengthen the surrounding stacking array .. 55

Thus, in the first lane behind the lining, the filling of the backfill array is exploded and voids filled, and in the second - the addition

backfill array and hardening of backfill material. In this case, the first strip acts as a jumper, protecting the workspace from the effects of an explosion and the penetration of hardening solutions.

The safety of blasting operations is guaranteed by the fact that explosive charges explode in an inert, water-saturated environment of the backfill array and under the protection of newly erected strips.

The frequency of laying injection pipelines and the location of the explosive charges are determined by the required compression properties of the backfill array. Periodicity can be taken within the width of 1-3 backfill strips in the direction of the lava movement. The magnitude of the explosive charge is determined by the conditions of destruction of the pipeline at the site of injection of hardening mixtures and the development of the necessary efforts to move the backfill material to close the voids formed, i.e. ensure the required completeness of bookmarks.

Claims (1)

Claim The method of laying the developed space, including periodically filling the bands with a filling material in the developed space and hardening the filling mass through the perforation channels of the pipeline, characterized in that, in order to increase the bearing capacity of the filling mass, the perforated pipes are laid into the space developed before filling the strip with a filling material on the surface the pipeline spreads the explosive charges and, before hardening the filling mass, it is compacted using energy of successive explosive charges of explosives, dozakladka hardening mixtures formed after the explosion of the cavities as they form, and the perforated pipeline with explosive charges placed parallel to the face in the newly constructed filling strip, explosion compaction, disassembly and hardening of the array carried out in each previous filling strip filling material subsequent to the newly constructed strip. 1500796 Μ 1500796 6 '6