Protective device for underground mine construction type

 

(57) Abstract:

The invention relates to the creation of underground structures and can be used as a protective device on a seldom used mine entrances of underground structures, including structures that contain harmful or hazardous products, such as underground nuclear station. The present invention addresses the problem of reliable protection of underground silo structures, including structures with hazardous industries. To solve this problem in a protective device of the underground mine construction type overlap is installed in the shaft at a certain depth relative to the surface of the earth and fixed anchor rods for circular foundations or private foundations located outside the lining of the mine above the ceiling, and inside the mine from the level of overlap to the level of the earth's surface is arranged in the filling of granular material such as sand in flexible bags. Backfilling can be arranged with bituminaria granular backfill material during operation of the facility. Backfilling can be arranged with the possibility of chemical fixation of granular backfill material in processorspecific a high degree of protection input structure when external dynamic and temperature effects, as well as to provide reliable localization of hazardous or radioactive substances during their emergency allocation above the established limits in the internal volume of underground structures. In addition, provided a relatively short time and labor required for opening and closing the protective device. 3 C. p. F.-ly, 1 Il.

The invention relates to the creation of underground structures and can be used as a protective device on a seldom used mine entrances of underground structures, including structures that contain harmful or hazardous products, such as underground nuclear station.

One of the most common types of protective devices at the entrances of underground structures are jumpers. Known bulk jumper installed in the mine workings and bounded on both sides by walls, loose body which is arranged by dredging, for example, of sand and, if necessary, during operation cemented. (See the application for the invention A. N. Aussage "Jumper bulk" N 92011586/33(057592), 20.02.95. g ). However, use at entrances of underground structures jumper not found. This is due to the complexity of dismantling jumpers, mouth, respectively, loads on the lining transmitted through the ceiling.

Known protective device of the nuclear power station, located in the underground mine construction type containing an overlap in the upper part of the building with a dirt filling on top of it (See. the book Melnikov N. N. Conwhen B. N. Naumov, C. A. "the Underground nuclear power plant". KOLA SCIENCE CENTER, USSR ACADEMY OF SCIENCES. Apatity, 1991, S. 13). The ceiling has a large span and, consequently, low bearing capacity. The thickness of the package and, therefore, its protective ability is also low. Furthermore, the design of the protective device does not allow you to quickly make its removal and subsequent recovery.

Known protective device underground mine construction type, similar to the last, where the overlap is used, the type design of the dome. (See Proceedings of the scientific-technical conference "Integrated use of underground space in the North-Western region". S. - Petersburg. 1994 S. 22, 23.) The carrying capacity of the slab, assuming symmetric loading increases, but the other disadvantages remain.

Known protective device underground mine construction type, containing the protective cover (peurile "Energy building" N5 1992 S. 18). This unit is adopted for the prototype.

The disadvantage of the prototype is that the device has a low defensive ability as in the case of external influences and internal accidents with release of harmful or radioactive substances in groundwater volume.

The present invention addresses the problem of reliable protection of underground silo structures, including structures with hazardous industries.

As a result of implementation of the present invention can be obtained from the following technical results: increase the protective ability of the protective device of the underground mine construction type of the dynamic and thermal effects: maintaining low complexity of the opening and closing device: enabling a reliable localization of hazardous or radioactive substances during their emergency allocation above the established limits in the internal volume of underground structures.

To achieve the said technical result in a known protective device underground mine construction type containing an overlap, the latter is "flexible", installed in the shaft at a certain depth you located on the outside of the lining of the mine above the ceiling, and inside the mine from the level of overlap to the level of the earth's surface is arranged in the filling (jumper) from the bulk material, for example, sand in flexible bags.

Backfilling can be arranged with the possibility of cementation of loose backfill material during operation of the facility.

Backfilling can be arranged with bituminaria granular backfill material during operation of the facility.

Backfilling can be arranged with the possibility of chemical fixing of loose backfill material during operation of the facility.

The drawing schematically shows a longitudinal section of a protective device of the underground mine construction type.

Protective device for underground mine construction type contains "flexible" overlap 1 installed in the shaft 2 at a certain depth, circular foundations or private foundations 3 located on the outside of the lining of the shaft 2 above the floor and thrust anchor 4 connecting overlapping 1 Foundation (Foundation) 3. Backfilling (jumper) 5 of granular material such as sand in flexible bags is inside stupelmana with ribbed surface, for example, from tubing to ensure transfer of the load from the bulk material on the lining).

Filling 5 can be arranged with the possibility of cementation, bituminaria or chemical fastening of loose material during operation of the facility. Providing such opportunities should include a number of structural and organizational measures implemented during the design and construction of protective devices, such as: selection and justification of the method of attachment of the granular backfill material 5: calculate the required height of backfill 5 to provide the required degree of protection against penetration of harmful or radioactive substances into the atmosphere in case of an accident inside underground structures: the choice of structure for fixing the granular backfill material 5 and the choice of equipment for the production of fixing: constructive activities that enable consolidation of backfill 5 using the selected equipment (for example, in the body of the backfill 5 when its impact can be laid perforated pipe).

The device operates as follows.

In normal operation the load from the weight of the backfill 5 is transmitted to the ceiling 1. However, perekreditovanii on the outside of the shaft 2. From the Foundation (Foundation) 3 load transmitted to the ground.

When dynamic effects on the upper surface of the backfill layer 5, for example, in the case of the crash, load, several relaxing the filling 5 is transmitted to the overlap of 1 and through the thrust anchor 4 and the Foundation (Foundation) 3 on the ground. "Flexibility" overlap 1 ensures its integrity during movement from tension anchor rods 4 and the precipitate Foundation (Foundation) 3 at the maximum rated load on the top surface of the backfill 5.

The technical feasibility of implementation and reliable operation of the proposed design is proven by our experience in hydraulic engineering when creating type buildings are connected by an anchor pile wall.

Depending on the temperature on the top surface of the backfill layer 5, for example, in case of fire, filling 5 provides reliable long-term protection of underground volume.

When dynamic effects (explosion) inside underground structures, the load on the lower surface of the slab 1 will not exceed the weight of the backfill 5, which will cause only a temporary reduction in tension of an anchor rod 4.

By accident in an underground facility in the course of its operation with backfill 5 by cementation, bituminaria or chemical grouting so that there would be a reliable localization of the indicated substances.

If necessary, the opening of the protective device is as follows:

1. Using a simple lifting device is hollow granular backfill material 5, for example, sand in flexible bags, on the surface of the earth.

2. Loosen and detach the anchor thrust 4 from the floor 1 and disassembling overlap 1 (in whole or elementwise).

Unlocking is done in reverse order.

The proposed protective device underground mine construction type can provide a high degree of protection input structure when external dynamic and thermal loads, as well as to provide reliable localization of hazardous or radioactive substances during their emergency allocation above the established limits in the internal volume of underground structures. In addition, provided a relatively short time and labor required for opening and closing the protective device.

1. Protective device for underground mine construction type, containing the lining of the shaft, and p is rnost land and fixed anchor rods for circular foundations or private foundations, located on the outside of the lining of the shaft above the ceiling, and inside of the shaft from the level of overlap to the level of the earth's surface is arranged in the filling of granular material such as sand in the elastic bag.

2. The device under item 1, characterized in that the filling is arranged with the possibility of cementation of loose material during operation of the facility.

3. The device under item 1, characterized in that the filling is arranged with the possibility of bituminaria bulk material during operation of the facility.

4. The device under item 1, characterized in that the filling is arranged with the possibility of chemical fixation of the bulk material during operation of the facility.

 

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