Method to form multicharge in drowned well

FIELD: mining.

SUBSTANCE: in the method to form charges in drowned wells, including drilling of wells, their filling with explosives and a plug from inertial materials, a multicharge is formed in wells filled with water, made of two different types of hose explosive charges. The main hose explosive charge with detonation speed corresponding to the speed of stress wave propagation in surrounding rock and weight of 75…80% from total mass of the multicharge is placed vertically along the well axis. The second hose explosive charge with high speed of detonation exceeding the speed of stress wave propagation in a rock massif and weight of 20…25% from the total mass of the multicharge, is placed along the spiral around the first hose charge, with a pitch of one turn along the vertical line equal to two well diameters. Linear initiation of the explosive multicharge is carried out simultaneously along the entire length of the well with a detonating chord with a charge of 40 g/m.

EFFECT: amplified amplitude of a voltage pulse and intensity of rocks grinding, which as a whole increases efficiency of drilling and blasting works with reduction of hazardous effect of explosion to environment.

5 cl, 1 dwg

 

The invention relates to mining, and in particular to methods of drilling and blasting operations in open pits in the formation of the combined charges in flooded wells, and can be used in various fields, using blasting in hard rock masses.

There is a method of separately forming the combined explosive charge dispersed by the depth of wells with the use of air gap height up to 3-4 m between charges or between the charge and the stemming, made of inert materials (see Efremov EI Preparation rock quarries / Eierman. - M.: Nedra. - 1980. - 271 S.).

The disadvantage of this method is that in flooded wells the formation of such a combined charge is difficult, thus reducing the efficiency of crushing rocks.

There is also known a method of forming explosive charge in the waterproofing membrane, previously placed in the well watered, due to displacement of water is more dense than water CENTURIES (see Sainov I.E. Technology loader flooded wells nedostojnymi explosives / Npeee, Bsales // Sat. Explosive case No. 89/46. - M.: Nedra. - 1986. - S-215).

The disadvantages of the method is that it does not allow for efficient and uniform crushing rocks, this increases the output of this kind.

Most Liskin to claimed is a method of forming a dispersed explosive charge in the waterproofing membrane, with the creation of air gaps in the watered well (see U.S. Pat. Of the Russian Federation No. 2306523, IPC F42D 1/08, publ. 20.09.2007, bull. No. 26).

This method also does not allow for efficient and uniform crushing rocks along the entire height of the ledge and to reduce the specific consumption of explosives.

The technical result of the invention is to increase the efficiency of blasting of rock crushing and reduction of oversize yield due to the formation in flooded wells combined charge, consisting of two hose explosive charge different forms, including various types of explosives, use of the combined tamping and linear simultaneous initiation of the explosive charge over the entire height of a powerful detonating cord with a hinge 40 g/m

The result is achieved that the method of charge formation in flooded wells, including drilling, formation of a charge of EXPLOSIVES and stemming from inert materials, characterized in that the formation of the explosive charge is carried out by placing in a water-filled wells hose charge, made in the form of a spiral, with the main hose charge, placed vertically along the axis of the bore, and an auxiliary charge hose wound upon a core, made of EXPLOSIVES with detonation speed greater than or equal to the propagation velocity in the wave stresses in the surrounding rock mass, respectively.

The method also differs in that the step of winding the auxiliary hose charge equal to two diameters of the well.

The method is also distinguished by the fact that the masses of the primary and auxiliary hose charges respectively 75...80% and 20...25% of the total mass of the charge.

The method is also distinguished by the fact that perform linear simultaneous initiation of auxiliary hose explosive charge along the entire length of detonating cord with a hinge 40 g/m

The method is also distinguished by the fact that the perform stemming from foamed polystyrene, is placed in the borehole above the explosive charge with a gap filled with water, and bulk material located above the well, a height of not less than three diameters of the well.

The method in that form in water-filled boreholes combined charge, consisting of two different types of hose explosive charge. Base charge comprising an explosive with a detonation speed corresponding to the speed of wave propagation stresses in the surrounding rock and weighing 75...80% of the total mass of the combined charge is placed vertically along the axis of the borehole in a thick-walled plastic hose. The second hose charge comprising an explosive substance with high detonation speed exceeding the speed of wave propagation of stresses in the rock mass and the mass 20...25% of the total mass of the combined charge, place in a spiral around the main charge. To intensify crushing apply linear simultaneous initiation of charges over the entire height of a powerful detonating cord with a hinge 40 g/m After placement in well watered explosive charge perform a combined stemming, including flooded land above the explosive charge, foamed polystyrene, laid on the water surface in the well, and the plot of the bulk material consisting of clay or fine gravel (5-20 mm) mixed with sand (35-40%) and drilling a trifle, a height of not less than three diameters of the well.

Efficiency rock crushing enhanced by blending the longitudinal, transverse and tangential stresses in a rock mass resulting from the simultaneous detonation of various types CENTURIES combined charge and locking of detonation products in the well until the complete destruction of the surrounding rocks combined with stemming. In areas meeting detonation waves in charge of stress waves in a rock mass is more intense crushing of rock.

Combined stemming can also improve the efficiency of explosion due to the "locking" of the detonation products and reduce the radius of fragmentation. The use of foamed polystyrene as stemming, in combination with bulk materials possessing sufficient vysokoplotnogo, compressibility and a high coefficient of internal friction, reduces the length of the tamping and create air gaps, providing maximum resistance to the pushing action of detonation products.

Schematic diagram of the method of charge formation in flooded wells is shown in figure 1.

The method is as follows.

In the drilled well watered (1) with a diameter of 0.16-0.20 m put a combined charge, consisting of two different types of hose explosive charge. Base charge (2)including the explosive with a detonation speed corresponding to the speed of wave propagation stresses in the surrounding rock and weighing 75...80% of the total mass of the combined charge is placed vertically along the axis of the borehole in a thick-walled plastic hose with a diameter of 0.10 to 0.15 M. the Second additional charge hose (3) diameter 0,024 m, including explosive substance with high detonation speed exceeding the speed of wave propagation of stresses in a rock mass and weight 20... 25% of the total mass of the combined charge, attached with twine and place in a spiral around the main charge (2) increments of one turn is equal to 0,15-0,20 m additional charge hose (3) attach twine powerful detonating cord (4) with the sample of 40 g/m After placing in an irrigated squag is not explosive charge perform combined stemming, including flooded land above the explosive charge (5), polystyrene foam (6), laid on the water surface in the well, and the plot of the bulk material (7), consisting of clay or fine gravel (5-20 mm) mixed with sand (35-40%) and drilling a trifle, a height of not less than three diameters of the borehole. Using detonating cord (4) produce linear simultaneous over the entire height of the initiation of the combined explosive charge.

Method of forming a composite explosive charge in flooded wells, based on the principles of the physical laws of destruction, allows to increase the beneficial use of explosive energy and improve the quality of crushing rocks without any additional cost due to the use of combined design and technological parameters of the explosive charge, a combination of different types of EXPLOSIVES and the combined tamping.

The combined explosive charge and the combined tamping allows you to increase the useful work of the explosion in the 1.3-1.5 times due to the interference of stress waves, reducing peak pressure and increase the total pulse duration of the explosion.

Multiple waves on rocks provides amplification of the amplitude of the pulse voltage and the intensity of rock crushing, thus reducing the cost of drilling wells through slimming is their perebor and in General to improve the efficiency of drilling and blasting works by reducing the harmful effects of the explosion on the environment.

1. The method of charge formation in flooded wells, including drilling, formation of a charge of EXPLOSIVES and stemming from inert materials, characterized in that the formation of the explosive charge is carried out by placing in a water-filled wells hose charge, made in the form of a spiral, with the main hose charge, placed vertically along the axis of the bore, and an auxiliary charge hose wound upon a core, made of EXPLOSIVES with detonation speed greater than or equal to the velocity of wave propagation stresses in the surrounding rock mass, respectively.

2. The method according to claim 1, characterized in that the step of winding the auxiliary hose charge equal to two diameters of the well.

3. The method according to claim 1, characterized in that the mass of the main and auxiliary hose charges respectively 75...80 20...25% of the total mass of the charge.

4. The method according to claim 1, characterized in that perform linear simultaneous initiation of auxiliary hose explosive charge along the entire length of detonating cord with a hinge 40 g/m

5. The method according to claim 1, characterized in that the perform stemming from foamed polystyrene, is placed in the borehole above the explosive charge with a gap filled with water, and bulk material located above foamed polystyrene, a height of not less than three diameters of the wells is determined.



 

Same patents:

FIELD: mining.

SUBSTANCE: during performance of drilling and blasting works in the lower part of each explosive well a bottom charge is arranged, on the outer surface of which there is a circular cumulative groove arranged, the top of which lies in the horizontal plane, which separates the volume of the bottom charge in two and matches the plane of a working site of an open pit ledge or a bottom of an underground stope. The value of well subgrade drilling is accepted as equal to the half of the cumulative groove base width.

EFFECT: reduced drilling flow due to reduction of subgrade drilling and higher quality of arrangement of a working site of open pit ledges and a bottom of stopes at underground mining works.

2 dwg

FIELD: mining.

SUBSTANCE: inclusions may be represented by layers of hard rocks, various lenses and other inclusions, such as permafrost (eternal frost) in less hard enclosing rocks. Explosive charges in additional shortened wells are placed at the level or below the soil of hard inclusions and are exploded with moderation relative to charges in the main wells. The proposed invention makes it possible to execute efficient grinding of solid inclusions that are previously softened by explosion of charges in the main wells, due to dynamic effect of explosive gases from explosion of charges in additional wells at the lower part of inclusions.

EFFECT: higher efficiency of grinding of various solid inclusions available in the upper and middle part of the ledge and arranged in less hard enclosing rocks.

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FIELD: oil and gas industry.

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1 dwg

FIELD: mining

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EFFECT: enhanced efficiency and safety of drilling and blasting operations alongside with ore beneficiation efficiency.

1 dwg, 1 dwg

Suspended well stem // 2441197

FIELD: mining.

SUBSTANCE: suspended well stem comprises flat elements and an elastic link. At the same time flat elements are made as two hingedly joined half-discs joined to each other, length of each equals 0.55-0.7 dw, and width - 0.65-0.9 dw. At one side each element is rounded, following the well circumference. A rope is fixed to the hinged joint, so that the hinged joint is arranged at the bottom.

EFFECT: higher operational reliability of the device, intensified process of rocks grinding, reduced specific consumption of explosive, higher quality of rock mass grinding, simplified and cheaper design.

3 dwg

FIELD: mining.

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FIELD: mining.

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3 tbl, 4 dwg

FIELD: blasting.

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1 tbl, 6 ex

FIELD: explosives.

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1 tbl, 12 ex

FIELD: mining.

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2 dwg

FIELD: mining.

SUBSTANCE: combined organic plug comprises a spacer part in the form of a cylinder, in the cavity of which a spacer cone is inserted, connected to a cable traction. At the same time the cylinder is made in the form of a jacket from a soft material, for instance, from a dense cloth, the upper part of the jacket is equipped with a split ring from elastic material along well diameter, and the lower one - with a cord, the spacer cone is made of organic material, for instance, from plastic mass or wood, with a bore in the central part, and a filling part, for instance, from bore mud, is placed into the jacket and on top of the spacer part.

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EFFECT: simpler formation of air gap in the explosive charge and higher reliability of the charge spread.

2 dwg

FIELD: explosives.

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EFFECT: easier formation of air gap in the explosive charge and higher reliability of charge dispersal by using the mechanical bore-hole gate.

2 dwg

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

FIELD: mining.

SUBSTANCE: combined charge shaping method involves formation of charge in water-flooded part of the well from water-resistant explosive, arrangement on mirror of water displaced upwards in the well of the mixture consisting of the material having floating properties, capable of withstanding the weight of charge from non-water-resistant explosive, on which non-water-resistant explosive is lowered. At that, material having floating properties and binding agent are pre-mixed; the obtained mixture is poured on surface of water displaced upwards with water-resistant explosive; after mixture is moistened due to contact with water, it is left in the well for the period required for mixture to cure on water surface, and after the obtained mixture is cured, non-water-resistant explosive is arranged on it.

EFFECT: enlarging the capabilities of the material having floating properties, and reducing the manufacturing cost of blasting operations.

1 dwg

Suspended well stem // 2419063

FIELD: mining.

SUBSTANCE: suspended well stem is arranged in the form of a solid cylinder, diametre of which is approximated and comparable to the well diametre to the maximum. The cylinder is installed at the depth of the massif with intensive cracking. Between a charge and a stem there is an air gap. The upper and lower ends of the cylinder are arranged as truncated in parallel to each other, besides the length L of the large axis of the formed ellipse equals 1.15-1.25 of the well diametre, besides, the upper end is fixed to the crosspiece arranged above the well head with a rope fixed near the lower edge of the truncated part of the stem.

EFFECT: invention makes it possible to use the energy of explosion products to the maximum, to intensify the process of rocks grinding, to reduce the specific weight of explosives, to increase quality of rock mass grinding, to increase reliability of the well stem, to simplify its manufacturing.

3 dwg

FIELD: explosives.

SUBSTANCE: method provides for delivery of emulsion explosive by means of pump to charging hose and during transportation via the latter of components of emulsion explosive components the supply to annular gap between the hose wall and the flow of water composition with surface-active substance. Alkyl benzene sulphonate (NP-1 sulphanole) or alkyl sulphate of secondary alcohol (penta-surface active substances) in quantity of 0.05-0.1% is used as surface active substance.

EFFECT: introduction of surface active substances allows reducing inter-phase surface tension between emulsion explosives and wall of charging hose, which considerably reduces the pressure during the charging process and excludes the break of the charging hose.

2 cl, 1 tbl

FIELD: earth or rock drilling, particularly means adapted to reduce mutual impact influence of explosives during well development and operation.

SUBSTANCE: method involves arranging one or more shock-absorbing members near one or more explosive doses, which prevent propagation of shock caused by detonation of the explosive doses. Shock-absorbing members include porous material, for instance gas-filled liquid or porous solid material, having 2%-9% porosity. Shock-proof screen may be arranged between detonating cord and explosive doses. Hollow charges may be placed in capsule.

EFFECT: increased reliability and capacity.

57 cl, 30 dwg

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