Well stemming method

FIELD: mining.

SUBSTANCE: during implementation of the method a stem the cross dimension of which is smaller than well diameter is lowered into well by means of stem lowering mechanisms attached to the stem. First, expansion is made in well at distance of 1-2.5 m from day surface; then, stem with stem lowering mechanisms fixed on one of its sides is lowered into well and its edges are located perpendicular to well wall till it reaches the expansion into which the stem ends are led.

EFFECT: increasing blast efficiency, reliability if stem installation, and reducing the cost of blasting operations.

4 dwg

 

The invention relates to mining, to the field of drilling and blasting operations in rocks and can be used in a variety of industries, using blasting in rock masses, in particular when the open development of mineral resources.

There is a method of drilling wells wherein in the necessary places create an extension of the well (Mpharmacy, Eierman, Megnevezesu, Art. Blasting high ledges, M.: Nedra, 1964).

The known method of tamping wells (RF patent for the invention №2371671, IPC F42D 1/08, publ. 27.10.2009), according to which in the well to a depth of array-intensive fracturing down the stemming and fixed to the lintel above the mouth of wells attached to the upper end of the rope.

The disadvantages of this method: there is a probability that the stemming engage the borehole wall and fly out without resistance during the explosion, and the need to have exploded block a certain amount of stiby for tamping.

The technical result of the invention is to improve the degree of crushing of rocks by explosion, reducing the cost of doing drilling and blasting by reducing specific consumption of EXPLOSIVES, increasing the efficiency of the explosion, increase plant reliability stemming and lowering the cost of blasting borehole method by locking products this is then in the charging cavity to the complete destruction of the array.

This technical result is achieved in that in the method of tamping wells, including lowering into the well to a depth of array-intensive fracturing tamping, the transverse size which is less than the diameter of the wells is attached to the stemming device for lowering the tamping into the well, according to the invention in a well pre-create an extension at a distance of 1-2 .5 m from the surface, then lower the stemming attached at one of its sides by a device for lowering the tamping in the hole, having its ends perpendicular to the borehole wall until it reaches extensions, which make the ends of the tamping.

The claimed technical solution is illustrated by drawings, where figure 1 shows the stemming in the moment of its installation into the borehole by the present method, figure 2 is the same view As in figure 1; figure 3 - stemming installed in the well by the present method; figure 4 is the same view B figure 3.

The method is as follows. Well create an extension 1 at a distance of 1-2 .5 m from the surface (wellhead). To one of the parties stemming of 2, made for example in the shape of a bar (or a thick Board), the transverse size that is less than the diameter of the hole, attach the device 3 for lowering and fixing of tamping 2 in the expansion of 1 well (e.g., two ropes or rope and a pole or DV is pole - to facilitate the establishment of the ends of the tamping in the extension of the well), having them mount on one side of the tamping 2 (see figure 1, 2). The stemming 2 is lowered into the borehole in a vertical position with its end faces perpendicular to the borehole wall to extension 1. Pulling the rope 3, attached to one side of the tamping when the stemming reached extensions in the hole, turn the stemming both her butt was in the extension. The ends of the ropes loosen (but if you use the staves, then take them back out of the well). At the moment of explosion of the gaseous products of the explosion fills all free to borehole stemming space well and go up to her, resting in the borehole stemming, which locks the gaseous products of the explosion, this leads to short-term locking of explosion products, thus increasing the duration of the expanding gaseous products of the explosion to destroy the array, hence the explosion energy to perform useful work - crushing rocks - spent. This results in intensification of rock crushing, reduction of specific consumption of EXPLOSIVES and improving the quality of crushing rock.

A specific example of the method. Charging wells were made on the branch of the criminal code KRU Tallinn coal mine" in the mountain area which is 1 when an explosion rocks, consisting of siltstone fortress 6-8 on a scale professional Protodiakonov MM Block was drilled by the drilling machine DMLJ No. 63 with grid 6 m × 6 m, depth of 26 m and a diameter wells 215,9 mm Wells drilled vertical, the total number of wells 414 pcs. passport explosion, the mass of the charge in the well was 150 kg of granulate yn-1. The inventive method was tested on 3 wells. In these wells at a distance of 1.5 m from the earth surface, in the zone, subject to destruction by the previous explosion, expansion was performed in the borehole to a diameter of 350 mm In these extensions in wells with rope and pole were installed wooden blocks with a size of 280×175×25 mm In the remaining wells stemming was drilling rubble. The explosion results allowed us to conclude the following: the inventive method for stemming reduces the emission of explosion products, to reduce the impact of shock waves on the surrounding objects, to improve the design quality of array explosion and reduce the specific consumption of EXPLOSIVES.

The inventive method of tamping wells allows maximum use of the energy of explosion products, to intensify the process of rock crushing, to reduce the specific consumption of EXPLOSIVES, to improve the quality of crushing rock. This is achieved by: ensuring on-time downhole tamping required to maximize the use of energy hazoor the importance of explosion products; simplifying the placement of tamping inside the well; ease of fabrication tamping.

The method of tamping wells, including lowering into the well to a depth of array-intensive fracturing tamping, the transverse size which is less than the diameter of the wells is attached to the stemming device for lowering the tamping into the borehole, characterized in that, in a well pre-create an extension at a distance of 1-2 .5 m from the surface, then lower the stemming, attached on one side devices for lowering the tamping in the hole, having its ends perpendicular to the borehole wall until it reaches extensions, which make the ends of the tamping.



 

Same patents:

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FIELD: explosives.

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FIELD: drilling and blasting operations in hard rocks, applicable in various branches using blasting, operations in hard rock masses.

SUBSTANCE: the spacer tamping bar represents a split cylinder with at least three longitudinal slots and a tapered expansion of the cavity down from the bottom, which is connected to the supporting ring through a spacer tube. A hollow spacer plug is inserted in the split cylinder from the bottom, it consists of tapered and cylindrical parts with at least three longitudinal slots, provided with a tubular haulage with a thread on the upper end, freely passing through the holes in the cylinder and supporting ring.

EFFECT: provided locking of blast products in the charge cavity before destruction of products in the charge cavity before destruction of the mass, enhanced efficiency of use of the blast energy for crushing of the rock.

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FIELD: drilling and blasting operation in hard rocks, applicable in various branches using blasting operations in hard rock masses.

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EFFECT: provided locking of blast products in the charge cavity before destruction of the mass, enhanced efficiency of use of the blast energy for crushing of the rock.

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EFFECT: enhanced operating safety of the machine due to its equipment with devices for prevention of origination of a blast at a rise of pressure or temperature in its vessel for emulsion.

4 dwg

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