RU1786276C - Method for construction of artificial pillars, isolation and gob packs, and dams in workings - Google Patents

Abstract

SUMMARY OF THE INVENTION: Two rails of wedge-shaped monolithic blocks are installed parallel to each other between the roof and the worked-out soil. The space between the enclosures is filled with bulk material, such as sand. Opposite blocks of fences are interconnected by stitches in the form of ropes. When the blocks are tightened, they move, and the wedge is introduced into the loose mass, which is pressed in and qualitatively podbuchivaya side rocks. 1 s.p. f-ly, 4 ill.

Description

The invention relates to the mining industry and can be used in underground mining.

The closest analogue in technical essence and the achieved result is a method comprising installing two fences between the soil and the working roof, equipping the fences with stitches, filling the space between the fences with bulk material, pressing the bulk material between the fences,

The disadvantage of this method is that it is difficult to carry out high-quality press-fit of bulk material between fences. This leads to the fact that the bearing capacity of the artificial pillar at the initial stage (before compaction of bulk material due to convergence of rocks) is low, which reduces the quality of maintaining the roof, leads to its delamination, increased pressure on the pillars and its destruction.

The aim of the invention is to improve the quality of the structure by increasing the degree of compaction of bulk material,

This is achieved due to the fact that when installing at least two fences between the soil and the roof parallel to each other, equipping the fences with stitches, filling loose material between the fences and pulling off the last fences, they are made of monolithic wedge-shaped blocks and when they are installed, the blades wedges are directed towards each other

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In addition, the bulk material is moistened before the guards are pulled together.

In FIG. 1 shows a cross section of an artificial pillar; in FIG. 2 - the same, with two rows of blocks; in FIG. 3 is the same as in FIG. 1, with one-sided wedges; in Fig, 4 - the position of the wedge blocks in the process of strapping fences,

The essence of the method is as follows.

When developing a reservoir field in a mined-out space 1, an artificial pillar (rubble strip) is created to support the roof 2. To do this, install two fences of blocks 3

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wedge-shaped parallel to each other. Blocks 3 are connected by cable ties 4 and the wedges of the wedge blocks 3 are oriented to each other. Blocks 3 are made of reinforced concrete and are provided with tensioned nuts 5. The space between blocks 3 is filled with loose material 6, for example, crushed rocks, sand, etc. To do this, a pneumatic filling system can be used. After filling the space between the fences, before the development of the convergence of rocks, the fences are tightened using the tension nuts 5 and ropes 4. In this case, the blades of the wedges of the blocks 3 are immersed in the bulk material 6 and squeezed out towards the roof 2 and the soil 7 of the worked-out space 1, which provides high-quality support of the side rocks.

Blocks 3 can be mounted in two (Fig. 2) in three rows (Fig. 4) in height. When installing blocks 3 in three or more rows, first centrally arranged blocks are stitched (Fig. 4), then peripheral blocks located near the roof and soil of the worked-out space. This ensures the creation of a good backwater rock. In order to reduce the internal friction of the granular material 6, it is advisable to moisten the granular material, for example, through the holes in the blocks 3 before stitching the fencing blocks 3; To reduce the adhesion between the blocks 3, it is advisable to place a lubricant layer, for example, of wet clay (not shown). When creating rubble strips on low-power formations, one-sided wedge-shaped blocks can be used (Fig. 3). This ensures the extrusion of granular material 6 towards the roof.

The method can be used to create insulating strips, for example, in the development of inclined and steep coal seams, to prevent the passage of fires to the underlying floors and horizons.

The described method can also be used to create dumb bridges in mine workings. Jumpers of this design provide effective repayment of an explosive shock wave in the conduct of mass explosions, because tight jumper contact with the output circuit is provided. If necessary, such a jumper is easily disassembled.

Claims (2)

1. A method of constructing artificial pillars, insulating and rubble strips, lintels in mine workings, including installing at least two fences between the soil and the roof parallel to each other, equipping the fences with stitches, filling the space between the fences with loose material and pulling the latter, characterized the fact that, in order to improve the quality of the structure by increasing the degree of compaction of the bulk material, the fences are made of monolithic blocks of wedge-shaped form, and when they are installed, the wedge blades guide added to each other. 2. The method of pop. 1, characterized in that before folding the fences, the bulk material is moistened. Figure 1. / ЩТЩ  //////////// Figure 2. -TO with V / -L L - - - - h - - - - - p . -./- g K / - ////////////// 1 Figure 4.