SU1320452A1 - Method of erecting foamed-plastic partitions - Google Patents

Abstract

The invention relates to mining, mining, and is intended to isolate mine workings in response to accidents in mines. The purpose of the invention is to reduce the air permeability of the lintel by increasing penetration ability of the hardening foam in the middle of its own rocks. In the mine work, one at a distance from one another, two support barriers are installed. Before feeding the hardening foam in the space between the partitions, an overpressure is created by injecting air into the barrier space with dispersed streams directed perpendicular to the roof of the excavation. The overpressure is maintained until the space is completely filled with hardening foam. Between the partitions, the hardening foam flows into the filter air and is entrained in the cracks of the lateral rocks and the body of the partitions, cures for 1 -1.5 minutes and forms a foam plastic that creates a good seal of the cracks. 2 Il. and (L o w o 4: cd

Description

one

The invention relates to the mining industry and can be used to isolate mine workings in response to accidents in mines.

The purpose of the invention is to reduce the air permeability of the lintels by increasing the penetrating power of the hardening foam into host rocks.

FIG. 1 shows a schematic diagram of the method; in fig. 2 is a diagram of a pipe with outlets for injecting air into the space between the partitions.

The method of constructing the jumper is carried out as follows.

At a distance of 3-5 .m from one another 15, two support partitions 1 are erected, in which a pipe 2 is installed for air injection, a pipe 3 for supplying a hardening foam into the space between the partitions, two pipes 4 and 5 for measuring pressure difference from an isolated space to a support partition, a pipe 6 for monitoring the state of the atmosphere in an isolated space, and a pipe 7 for draining water from an isolated space. A manometer 8 is connected to the ends of pipes 4 and 5, and a source of 10 compressed air is connected to pipe 2 by means of a sleeve 9. Before supplying the hardening foam, air is forced into the space between the partitions and a pressure differential is created on the first partition wall from the insulated space, equal in absolute value to the maximum depression of the insulated area. Then, the foam generator 11 is turned on and a hardening foam is injected into the space between the partitions along the flexible sleeve 12.

20

25

thirty

The hardening foam fed into the space between the partitions is filtered air flows into the lateral cracks and the body of the partitions and for 1 -1.5 minutes, it has flowed, cured and forms foam plastic that creates a good sealing of the cracks. The air entering through the pipe 2 is redistributed evenly through the taps 13. The holes 14 on the pipe 2 and the taps 13 are designed so that the air jets emanating from them are directed perpendicular to the roof of the excavation. In this case, dispersed small air jets, hitting the roof of the mine, lose their speed.

Experiments have shown that such a dispersion of sources of air entering the space between the partitions prevents the destruction of the foam structure and ensures effective sealing of cracks along the entire height of the excavation.

Claims (1)

Invention Formula A method of erecting a foam bridge, which includes installing two support walls in a mine working at a distance from one another and feeding hardening foam into the space between the walls, characterized in that Before supplying the hardening foam in the space between the partitions, they create an overpressure by injecting air into the bridged space and maintain it until full. In order to fill the space between the 35 countries with a hardening foam, the hardening foam is shown to force air into the confined space, and the mano meter regulates the flow rate through the partition walls. perpendicular blood pressure at a given level. 1320452 0 five 0 five 0 The hardening foam fed into the space between the partitions is filtered air flows into the lateral cracks and the body of the partitions and for 1 -1.5 minutes, it has flowed, cured and forms foam plastic that creates a good sealing of the cracks. The air entering through the pipe 2 is redistributed evenly through the taps 13. The holes 14 on the pipe 2 and the taps 13 are designed so that the air jets emanating from them are directed perpendicular to the roof of the excavation. In this case, dispersed small air jets, hitting the roof of the mine, lose their speed. Experiments have shown that such a dispersion of sources of air entering the space between the partitions prevents the destruction of the foam structure and ensures effective sealing of cracks along the entire height of the excavation. Invention Formula A method of erecting a foam bridge, which includes installing two support walls in a mine working at a distance from one another and feeding hardening foam into the space between the walls, characterized in that Before supplying the hardening foam in the space between the partitions, they create an overpressure by injecting air into the bridged space and maintain it until full. ying space hardening foam, the air in gnetanie zaperemychennoe The space is performed dispersed stru- E, directed perpendicularly to the roof generation. Editor Y. Sereda Order 2631/34 VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production Facility, Lygraphic Enterprise, Uzhgorod, ul. Project, 4 (Rez. 2 Compiled by V. Baranov Tehred I. VeresKorrektor B. But ha Circulation 429 Subscription