RU2636070C1 - Method for hydraulic backfilling of chambers - Google Patents

Abstract

FIELD: mining engineering.

SUBSTANCE: method includes drilling of wells in inter-chamber pillars, laying of bottom-hole pulp line, supply of pulp to deposited chamber through wells. In this case, the pulp line is laid in perpendicular to bottomhole pulp line through the wells for the whole length of chamber block, the holes are made in it above each chamber for feeding pulp and successive backfilling of block chambers is carried out.

EFFECT: reduced duration of backfilling operations and reduction of labour input due to laying of one bottom-hole pulp line into the block of chambers.

4 cl, 4 dwg

Description

The invention relates to the mining industry and can be used in underground mining with the laying of the developed space.

A known method of hydraulic laying of chambers, including drilling wells entirely at the roof level, transporting the filling mixture through a slurry pipeline and supplying it to the chambers through the wells, in which the wells are drilled along the pillar to the first point of mixture supply from the chamber, alternately feed the mixture into the chambers by sequential openings of wells at the points of supply, and at each subsequent point of supply of the wells, they are opened after the filling of the filling array to the maximum height at the previous point of supply (A.S. 1788299, MKI ⁵ E21F 15/00 Spos on the hydraulic laying of the chambers, z.

The disadvantages of the described method are the need to drill long (more than 150 m) wells in their entirety, which is technically difficult to produce under conditions when the treatment chamber is passed taking into account the formation hypsometry, as well as drilling and blasting operations that adversely affect the bearing capacity of interchamber pillars.

Closest to the proposed invention is a method of hydraulic laying of chambers, including feeding pulp into the chamber to be laid through wells, in which the filling material is fed into the chambers under overpressure through a safety device having the form of a tee, one end of which is connected to the bottomhole slurry pipeline, the other to the sealant , and on the third a safety membrane is installed (Pat. No. 2449130, MITK ⁶ E21F 15/08 Method for the hydraulic laying of chambers, Z. No.2010149795 / 03, declared 03.12.2010, published on 04.27.2012).

The disadvantage of this method is the need for installation and dismantling of the slurry piping in each chamber adjacent to the mortgaged to feed the stuffing material into neighboring chambers, which requires a significant investment of time.

The technical result of the invention is to reduce the duration of laying work and reduce labor costs for installation and dismantling of slurry pipelines by laying one downhole slurry piping on the camera block and the simultaneous laying of several chambers through the slurry piping passed through the wells (“downhole” slurry piping).

The invention is illustrated by drawings, which depict: in FIG. 1 is a diagram of the laying of chambers with holes in the "borehole" slurry pipeline; in FIG. 2 - section along aa; in FIG. 3 is a diagram of the laying of chambers with the shortening of the “borehole” slurry pipeline; in FIG. 4 - a section along BB.

In the drawings: 1 - camera; 2 - downhole slurry pipeline; 3 - "downhole" slurry pipeline; 4 - interchamber pillar; 5 - well, 6 - hole in the "downhole slurry pipeline"; 7 - jumper; 8 - block chamber to be laid; 9 - cut off sections of the pipeline.

On the site to be bookmarked, a block of cameras is allocated. Depending on the geological conditions in the block, the number of chambers varies from 3 to 12 (Fig. 1, 2, 3, 4).

The method of hydraulic tabs is as follows.

Downhole slurry pipe 2 is mounted in the chamber 1 adjacent to the block being laid, from which a “borehole” slurry pipe 3 is perpendicularly laid over the entire block of chambers. To do this, under the roof of the chamber 1 in the inter-chamber pillars 4, wells 5 are drilled. Drilling of wells in the pillars is carried out so that the beginning of each subsequent well is opposite the end of the previous one. There can be several “borehole” slurry pipelines 3, and their number depends on the required degree of filling the chambers with filling material and on their hypsometry (Fig. 1, 2).

To ensure the exit of the pulp into the chamber in the "borehole" slurry line 3, holes 6 are drilled above each chamber being laid in the block. The diameter of the holes depends on the diameter of the slurry pipeline and the composition of the filling material and can average 150-200 mm. There can be several holes 6 in the “borehole” slurry pipeline within one chamber. So, with a large width of the chambers, more than 5 m, holes 6 can be two or three. Then, jumpers 7 are erected in the block chambers to be laid (Fig. 1, 2).

Next, the pulp is fed into the block chambers to be laid. The main part of the pulp will go to the first laid chamber of block 8 from the bottomhole slurry line 2. As the laying is made, the pulp closes the holes 6 in the first chamber counting from chamber 1 and then goes through the “borehole” slurry line 3 to the second chamber. Similarly, all other cameras in the block are laid. After completing the laying of the camera block, the downhole slurry pipe 2 is dismantled, and the “downhole” slurry pipe 3 is left (Fig. 1, 2).

It is also possible to set up a block of chambers with shortening the “borehole” slurry pipeline.

After the installation of the “borehole” slurry pipeline 3 is completed, jumpers 7 are installed and the pulp is fed into the block chamber 8 to be laid, which is the last one from the chamber 1 in the block to be laid. When the desired degree of filling in the chamber is reached, the pulp supply is stopped. The fact of filling the chamber is fixed either by a manometer installed on the “borehole” slurry pipeline, or visually if there is access to the chamber, for example, from a ventilation drift (Fig. 3, 4).

Next, the slurry pipeline is shortened in the penultimate chamber of the block to be laid by cutting off its section from the last chamber to be laid in block 8, which is already laid. Then feed the pulp into the penultimate camera. Similarly, lay the rest of the camera in the block. The cut off sections of the slurry pipeline 9 can be used again (Fig. 3, 4).

Claims (4)

1. The method of hydraulic laying the camera block, including drilling wells in the inter-chamber pillars, laying the bottomhole slurry pipeline, feeding the pulp into the laid chamber through the wells, characterized in that perpendicularly to the bottomhole slurry pipe, the slurry pipe is laid through the wells for the entire length of the block of chambers, holes are made in it above each camera for feeding pulp and carry out sequential bookmark block cameras. 2. The method according to p. 1, characterized in that they carry out sequential laying of the camera block, and as one chamber is filled, the slurry pipe is shortened by cutting off its section in the adjacent chamber. 3. The method according to p. 1, characterized in that several borehole slurry pipelines are laid, and their number depends on the required degree of filling the chambers with filling material and on their hypsometry. 4. The method according to p. 1, characterized in that the holes in the borehole slurry piping within the same chamber do several, and their number depends on the width of the chamber.

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