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IPC classes for russian patent Method of dust suppression during blasting works in pits (RU 2513731):
Another patents in same IPC classes:
Dust suppression method during blasting operations / 2511326
Invention refers to mining and may be used for fine dust control during open mining of mineral deposits with blasting operations. Proposed dust suppression method during blasting operations consists in moistening of blasted unit with fluid from irrigation plant before blast. As irrigation fluid, biohumus aqueous solution is used, which concentration in solution is 10-25%. The specified solution is used for treatment of blasted unit after charge and further well stemming to mounting of blasting circuit.
 Method of dust catching in process of coal mass transportation / 2485321
Method includes moistening of a transported mass by spraying of liquid via nozzles with the help of a high pressure source. At the same time the process of transported mass transportation is additionally monitored with the help of a control device arranged under a conveyor belt and switching on when it sags under weight of the transported mass, and when it actuates, the transported coal mass is irrigated with moistening liquid. Besides, the assigned task is solved since irrigation of the transported mass after actuation of the control device is carried out by means of moistening liquid supply with the help of an injection plant to nozzles of preliminary irrigation, in its turn the injection plant is switched on by opening a valve with the help of a gear pump. Additionally in process of transportation the transported coal mass is moistened in areas of overturning, for this purpose on a conveyor in areas of overturning a vertical valve is installed, with the help of which arrival of the transported mass is controlled.
Method to prevent and suppress self-ignition / 2482279
Method includes spraying a liquid in a flow of air arriving to a mined space. At the same time liquid spraying is alternated with supply of dry gas into coal deposits. Moisture content in gas discharged from the coal deposit is measured. Gas supply is replaced with liquid spraying in case moisture content stops dropping in gas discharged from coal deposit.
Method for preventing coal self-ignition in mines / 2472938
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 Method to arrange mine tunnels in mines that are dangerous due to methane gas content / 2466277
Previously laboratory analysis is carried out on coal from a bed and its packs to detect availability of elements and substances in them that may create compounds with water; natural cracking is detected, as well as cleat in the coal bed; wells are drilled from a bottomhole by coal, with length more than by 1 m of the mine skirting cycle; water is injected into the bed with continuous measurements of the methane, water pressure, injection time; the mine is tunnelled for the value of the hydrated bed with the speed that does not exceed methane release within permissible norms; in the area of bed hydration blast holes are drilled in the sides of the mine at each cycle to detect the hydration area. During arrangement of the mine, parameters are varied, which are related to injection of water into bed, maximum reduction of the released methane, optimising arrangement of the mine.
 Method of dust suppression during blasting / 2441166
Method includes long-term treatment of a dust and gas cloud with water vapour during the blast and afterwards. Vapour is produced by a mobile steam generator by introduction of water in it that has been heated previously up to 65-70°C. The steam generator is installed in the place that is safe from the blast and is directed along with the wind. Besides, prior to blasting, atmosphere above the blasting area undergoes treatment.
 Device of pressure water supply into irrigation systems / 2403394
Device of pressure water supply to irrigation systems arranged on sections of shield mechanised support for underground mines, includes at least one system of plough or combine working element route irrigation in longwall, and at least one system for irrigation of worked space, upper ceiling and/or side mine with central water line for supply of spray nozzles of irrigation systems and switching valves. At the same time all switching valves for irrigation systems are installed in a single irrigation valve box, which is equipped with connection for water line and is arranged on section of shield mechanised support in the form of unit separated from hydraulic valve box.
 Method for assessment of rocks danger by friction inflammation of air-methane mixture / 2377411
Invention is related to the field of mining, in particular, to safety issues in coal mines, namely to explosions of methane caused by friction spark created as a result of mine machines picks friction against hard rocks. Method is suggested to assess danger of rocks regarding friction inflammation of air-methane mixture, which consists in the fact that rock samples are taken, their strength and content of silicon dioxide are determined, and then tests are carried out at test bench danger of friction sparking. In order to perform test, explosive mixture is formed in test bench, and nominal cutting speed is increased 1.5 times. If at hardness of rocks f from 3 and content of silicon dioxide up to 30% no inflammations were observed and no friction sparks were produced, then rock is considered safe. If at hardness of rock from 3 to 5 and silicon dioxide content from 30 to 50% with availability of friction sparks with temperature of up to 300°C and absence of inflammations, rock is considered as spark-hazardous of the 1st extent, and if their temperature is more than 300°C - to spark-hazardous of the 2nd extent. If at least one inflammation occurred from friction sparks, rock is considered highly explosive. Use of suggested method makes it possible to increase safety of cleaning and preparatory works.
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 / 2278272
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Method for assessment of rocks danger by friction inflammation of air-methane mixture / 2377411
Invention is related to the field of mining, in particular, to safety issues in coal mines, namely to explosions of methane caused by friction spark created as a result of mine machines picks friction against hard rocks. Method is suggested to assess danger of rocks regarding friction inflammation of air-methane mixture, which consists in the fact that rock samples are taken, their strength and content of silicon dioxide are determined, and then tests are carried out at test bench danger of friction sparking. In order to perform test, explosive mixture is formed in test bench, and nominal cutting speed is increased 1.5 times. If at hardness of rocks f from 3 and content of silicon dioxide up to 30% no inflammations were observed and no friction sparks were produced, then rock is considered safe. If at hardness of rock from 3 to 5 and silicon dioxide content from 30 to 50% with availability of friction sparks with temperature of up to 300°C and absence of inflammations, rock is considered as spark-hazardous of the 1st extent, and if their temperature is more than 300°C - to spark-hazardous of the 2nd extent. If at least one inflammation occurred from friction sparks, rock is considered highly explosive. Use of suggested method makes it possible to increase safety of cleaning and preparatory works.
Device of pressure water supply into irrigation systems / 2403394
Device of pressure water supply to irrigation systems arranged on sections of shield mechanised support for underground mines, includes at least one system of plough or combine working element route irrigation in longwall, and at least one system for irrigation of worked space, upper ceiling and/or side mine with central water line for supply of spray nozzles of irrigation systems and switching valves. At the same time all switching valves for irrigation systems are installed in a single irrigation valve box, which is equipped with connection for water line and is arranged on section of shield mechanised support in the form of unit separated from hydraulic valve box.
Method of dust suppression during blasting / 2441166
Method includes long-term treatment of a dust and gas cloud with water vapour during the blast and afterwards. Vapour is produced by a mobile steam generator by introduction of water in it that has been heated previously up to 65-70°C. The steam generator is installed in the place that is safe from the blast and is directed along with the wind. Besides, prior to blasting, atmosphere above the blasting area undergoes treatment.
Method to arrange mine tunnels in mines that are dangerous due to methane gas content / 2466277
Previously laboratory analysis is carried out on coal from a bed and its packs to detect availability of elements and substances in them that may create compounds with water; natural cracking is detected, as well as cleat in the coal bed; wells are drilled from a bottomhole by coal, with length more than by 1 m of the mine skirting cycle; water is injected into the bed with continuous measurements of the methane, water pressure, injection time; the mine is tunnelled for the value of the hydrated bed with the speed that does not exceed methane release within permissible norms; in the area of bed hydration blast holes are drilled in the sides of the mine at each cycle to detect the hydration area. During arrangement of the mine, parameters are varied, which are related to injection of water into bed, maximum reduction of the released methane, optimising arrangement of the mine.
Method for preventing coal self-ignition in mines / 2472938
Method involves supply of frozen fluid obtained by mixing with liquid gas to the worked-out space. In addition, distribution of coal dust supplied to the worked-out space is determined as to particle fractions. Distribution of the obtained frozen fluid particles as to fractions is equal to distribution of coal dust as to particle fractions.
Method to prevent and suppress self-ignition / 2482279
Method includes spraying a liquid in a flow of air arriving to a mined space. At the same time liquid spraying is alternated with supply of dry gas into coal deposits. Moisture content in gas discharged from the coal deposit is measured. Gas supply is replaced with liquid spraying in case moisture content stops dropping in gas discharged from coal deposit.
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FIELD: blasting.
SUBSTANCE: method includes stages, at which they fill each well with an explosive charge and place a tight shell with water on the surface of the exploded block near head of each well. At the same time the tight shell with water is placed in a hollow cylinder installed above the well head. Besides, the diameter of the cylinder is comparable with the well diameter, and height is selected depending on the necessary volume of the tight shell.
EFFECT: increased efficiency of dust suppression and increased efficiency factor of explosive energy during mass blasting of wells at pits.
The invention relates to the mining industry, in particular to methods of dust suppression during massive explosions wells in pits, and can be used in rocks of any category of strength and watering.
Closest to the claimed technical essence is a method of dust suppression during massive explosions fender wells in pits that includes filling each well with charges of explosives (he) and placing the sealed shell with water on the surface of exploding block near the mouth of each well (against dust and poisonous gases when drilling and blasting in open pits. Mikhailov V.A., Beresnevich, PV, Loboda A. I. Rodionov NF M.: Nedra, 1971. - s).
The disadvantage of analogue is that water in a sealed envelope, not fully used for wetting the fine products of destruction of rocks, which reduces the effectiveness of dust suppression according to a known method and waste materials, in particular water, which must be considered along with excessive work on the implementation of the method. In other words, use only the amount of water that is directly over the mouth of the well. This is due to the fact that when the explosion occurs breakthrough shell after expanding products is sriva of the explosion chamber, advancing the General uplift of the surface of the blasted rock block. Therefore, only a partial atomization of the liquid volume above the surface of the blasted rock block. The remaining water moves together with the surface of the blasted rock block, while on her after the expiration of the hermetic shell that has lost its integrity after the above breakthrough. This part of the water is not sprayed because of the nature of the influence exerted on them, namely the linear speed of the lifting surface of exploding block and its temperature repeatedly yield similar characteristics to the expiration of explosion products of the explosion chamber, which could not lead to the dispersion and, consequently, prevent you from performing useful work on coagulation and deposition of fine pedigree parts for dust suppression.
The technical result of the invention is to improve the effectiveness of dust suppression and increase in efficiency energy EXPLOSIVES with a mass explosion wells in pits.
This technical result is achieved in that in the method of dust control when blasting in open pits, including filling each well with an explosive charge (CC) and placing the sealed shell with water on the surface of exploding block near the mouth of each well according to the claimed is the invention of the sealed shell with water placed in the manner prescribed above the mouth of the bore hollow cylinder, the diameter commensurate with the diameter of the hole, and the height which puts the hermetic shell of the required amount.
The volume of the placed hermetic shell is determined by several factors, the main of which are mining and geological conditions of mining operations, as well as production conditions, determining an operational need. Consider both groups significant factors. Obviously, mining and geological conditions of mining operations, such as lithology drilling and blasting unit, strength, fracture, structure, water content composing rocks, affect the intensity of dust during drilling and blasting impact. Also, depending on the production conditions is necessary to provide a controlled specific impact of exploding the array, as for example when using bestransportnye technology, blasting is carried out to reset the breed, when calling a complex coal-rock blocks to reduce violations contact breed-coal deliberately reducing the specific consumption of EXPLOSIVES and amerivault respectively developed wells, when the shaking of detonations frozen weak rocks vary the intensity and volume of dust, and hence the need to use one or another volume of pulpotomies.
PR is that to increase the effectiveness of dust suppression diameter of the cylinder is comparable with the diameter of the hole, the only obvious tool to change the volume of the placed hermetic shell is the height of the cylinder. Thus, for the different, the above-described conditions, the calculation-experimental method is selected cylinder with height, allowing it to accommodate a sealed envelope containing necessary and sufficient for current conditions, the amount of water.
The inventive method is as follows.
Each well of the rechargeable unit is filled with an explosive charge (CC) and over its mouth is placed a hollow cylinder, the diameter of which is commensurate with the diameter of the hole and the height of the cylinder provides accommodation hermetic shell of the required amount, the hollow cylinder is placed tight casing filled with water.
A specific example of implementation of the proposed method.
Charging wells produced at JSC cut Boruszewski mountain station # 1 in the explosion of rocks consisting of Sandstone and siltstone, interspersed depth fortress 7-10 on a scale professional Protodiakonov MM Block was drilled by the drilling machine SBS-200 No. 261 with a grid of 5 m to 6 m, depth 15 m and a diameter of 215.9 mm, cut 8 m Wells drilled vertical. The total number in rivenich wells was 220 PCs On the passport of the explosion, the mass of the charge in the borehole was 474,3 kg of the Inventive method was tested on 100 wells. Charging wells was carried out as follows. At the bottom of a borehole to the detonating cord lowered his sword TG-P, then realized mechanized charging wells Siberia. Over the mouth of each well placed hollow cylinder (e.g., cardboard, plastic), with a diameter commensurate with the diameter of the hole, and the height of the cylinder defined calculation-experimental method. In the hollow cylinder was placed a sealed envelope filled with water (or other palapathwala, for example, any coagulant, usually water, sometimes with surface-active substance (SAS)). Thus was charged 100 wells.
At the time of production of the explosion, the expanding gases during the upward flux from the explosion chamber encounter on the way the cylinder is sealed envelope filled with water. As the cylinder diameter commensurate with the diameter of the blast hole, the entire volume contained in a sealed envelope water will be sprayed expanding products of the explosion that will allow you to maximize the use of water as a coagulant, and delete the unwanted distraction of the materials used.
After conducting a massive explosion reported a marked accelerating the reduction of dust in the steamy pool at the place of explosion. The raising of dust and gas cloud to a height of over 40 meters and its further dissemination beyond the mine workings were observed.
The intensification of the process of deposition of dust over the site of the explosion can reduce the contamination of the quarry site, which is a positive effect on the environmental situation in the region mining operations.
The method of dust control when blasting in open pits, including filling each well with an explosive charge (CC) and placing the sealed shell with water on the surface of exploding block near the mouth of each well, wherein the hermetic shell with water placed in the manner prescribed above the mouth of the bore hollow cylinder, the diameter of which is commensurate with the diameter of the hole, and the height which puts the hermetic shell of the required amount.
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