SU1027400A1 - Method of erecting mine working roof support - Google Patents

Abstract

ERECTION METHOD mine support comprising shuttering installation, creating artificial fracture zone by the drilling of holes and blasting them kamufletnyh charges, cementing wells drilled -to artificial fracture zone forming the lining-supporting shell and the outer shell of reinforced rocks by injecting hardening materials, characterized in that, in order to improve the quality of the lining, the drilling of holes and the blasting of charges into them is carried out after the formation of the inner face internally-bearing shell during the setting of the concrete, after which the wells are drilled through the compacted backfill explosion inner liner bearing shell.

Description

The invention relates to the construction of underground structures, in particular to methods of lining of mine workings, and can be used in the mining industry, transport and hydraulic engineering.

There is a method of erection of lining of mine workings, which includes installation of the formwork during the development, construction of the inner facing-bearing shell by pumping hardening materials through the formwork and creating an outer shell of reinforced rocks 1.

There is also known a method for erecting lining of mine workings, including installation of formwork, creating an artificial fracture zone by drilling taps to accommodate camouflet explosive charges, blasting camouflet charges, drilling cement wells, and forming an inner facing non-clad shell and outer shell from reinforced rock formations. materials into wells in the zone of artificial fracturing from camouflage blasting.

The advantage of this method is that the implementation allows you to create the lining with a uniformly distributed load-carrying capacity 2.

The disadvantages of these methods are the poor quality of the support at the contour of production, as a result of the formation of air pockets, and as a result of the fragile bonding of rock formations in space between the formwork and the contour, of the massif.

The aim of the invention is to improve the quality of the lining.

This goal is achieved in that according to the method, including the installation of formwork, the creation of an artificial fracture zone by drilling knocks and blasting camouflet charges in them, and drilling of cement wells in the zone of artificial fracture. The formation of the inner cladding-bearing shell and the outer cladding of reinforced rocks by injecting hardening materials, drilling drills and blasting charges in them after the formation of the inner cladding-bearing shell in the period of concrete setting, after which the tamping wells are drilled through

the internal facing facing shell compacted by the explosion.

FIG. 1 shows a vertical longitudinal section of the mine workings; in FIG. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 is a cross-section of the FIG. I.

The construction of the lining is carried out as follows.

0 As the excavation advances, sections of metal formwork 1 are installed, which serves as temporary support and formwork to form the inner facing-bearing shell of the support.

In order to prevent the hardening material from leaking out, the end wall was erected 2 by known methods. Then the pressure hoses 4 are attached to the pipes 3 fixed on the formwork 1 and hardening material is pumped over the formwork.

0 for example, cement-sand mortar, concrete, cement-, ash solution, etc.

After filling with the hardening material the space between the breed contour and formwork 1, i.e. the formation of the inner facing-bearing shell 5,

 drill bit 6 to a depth equal to the thickness of the hardening zone (1.0-2.5 m), charge the drill holes 6 with camouflage charges of explosive 7 and explode. Moreover, drilling of bores, charging and blasting of camouflage charges 7 is carried out during the period of setting, hardening material.

After blasting camouflage charges 7 through nozzles 3 in formwork 1 and the internal facing casing 5 compacted by the explosion, the bore t is cementing

5 wells 8 to a depth equal to the thickness of the zone of artificial fracturing. Then the wells are equipped with injectors 9. The sleeves 4 are connected to them and a hardening material, such as cement mortar, is injected into the zone of artificial fracture, thereby forming the outer shell 10.

The application of the proposed method does not reduce the quality of the outer shell of hardened rocks, but significantly improves the quality of the inner facing casing due to the compaction of its material by blasting camouflet charges behind the inside casing.

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Claims (1)

METHOD FOR ESTABLISHING MOUNTAIN PRODUCTION FASTENERS, including setting the formwork, creating a zone of artificial fracturing by drilling holes and blasting camouflage charges into them, drilling cement wells in the zone of artificial fracturing, forming an inner facing-bearing shell and an outer shell of hardened rocks by pressing , characterized in that, in order to improve the quality of the lining, drilling holes and blasting charges in them is carried out after the formation of the inner facing-n sheer shell in concrete curing period, after which the wells are drilled through the compacted backfill explosion inner liner bearing shell. FIG. 7 SU .... 1027400