Combined charge shaping method

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

 

The invention relates to mining and can be used for loading wells by blasting in mining. The invention can also be used in the production of explosions in the building.

Known methods of loading flooded wells, which use expensive waterproof explosives (he) (Welburn, Wagoner "Equipment and technology of blasting in USA M.: Nedra, 1989, 376 S.; Bunkhouses "the Destruction of rocks by explosion. Explosive technologies in industry", M: Publishing house of Moscow state mining University, 1994, 446 C.), which increases the cost of preparation 1 m3blasted rock.

There is also known a method of forming a combined charge (Welburn, Wagoner "Equipment and technology of blasting in USA M.: Nedra, 1989, 376 S.; Bunkhouses "the Destruction of rocks by explosion. Explosive technologies in industry", M: Publishing house of Moscow state mining University, 1994, 446 S.), in which the water poured granular waterproof CENTURIES (granulator), which is heavier than water, and after filling them well in his charge nevodostoykogo CENTURIES. But this BB 2.0-2.5 times more expensive waterproof emulsion EXPLOSIVES and currently is almost never used.

The known method of forming a combination of the CSOs charge (RF patent for the invention №2364828, IPC F42D 1/08, publ. 20.08.2009)adopted for the prototype, including the formation in flooded parts of the borehole charge of waterproof CENTURIES, placing on the mirror pushed up the well water of a subject with floating properties capable of withstanding the weight of the charge of nevodostoykogo CENTURIES, which put the pieces of rock or drill cuttings, placed in tissue or plastic shell of a diameter greater than the diameter of the hole.

The disadvantages of this method: the complexity of the loading flooded wells, the high cost of production blasting.

The technical result of the invention is to empower the execution of the material from which is made the subject with floating properties, reducing the cost of production blasting due to the replacement of expensive waterproof CENTURIES cheaper nevodostoykogo CENTURIES.

These objectives are achieved by the fact that in the method of forming a combined charge, including the formation in flooded parts of the borehole charge of waterproof CENTURIES, placing on the mirror is displaced upward through the borehole water material with floating properties capable of withstanding the weight of the charge of nevodostoykogo CENTURIES, which lowered nevodostoykogo CENTURIES, according to the invention are pre-mixed material with the melt is CIMI properties and a binder, the resulting mixture is poured on the surface of the water displaced waterproof CENTURIES after contact with water, the mixture is moistened, it left in the well to the time required for solidification of the mixture on the surface of the water, and after curing the resulting mixture at her place nevodostoykogo CENTURIES.

The inventive method is illustrated by a drawing, which shows a diagram of the loading watered well.

The method is as follows. First, on the bottom of the well is lowered action 1, then fall asleep waterproof BB 2 at the minimum, a valid passport blasting quantity. Pre-prepare a mixture of the material with floating properties, and a binder. Then on the mirror 3, the extruded upward through the borehole waterproof BB 2, put the prepared mixture of 4 made, for example, sawdust, mixed with cement. This allows you to extend the capabilities of the execution of the material from which is made the subject with floating properties. Once in contact with water, the mixture is moistened, it left in the well for several hours required for solidification of the mixture on the surface of the water. The solidified mixture forms a tube, on which is placed the following action 1 and poured into the well nevodostoykogo BB 5 in number, not the required for high-quality explosion on the passport CENTURIES. Are stemming of the well.

An example of a specific implementation of the method.

The method was implemented on the branch of JSC "MC Creu" Tallinn coal mine", in the mountain station No. 3, the bottom of the excavator ASH-20/90 No. 20, when an explosion rocks the castle 7 on a scale professional Protodiakonov MM Block was drilled by the drilling machine DML No. 63 with grid 6 m 6.5 m, a depth of 25 m and a diameter of 215,9 mm Wells drilled vertical. The inventive method was tested on 5 wells. First, on the bottom of the well down to the detonating cord Thriller FRI P, then poured expensive waterproof BB - Siberia 1200 - 280 kg, then on the surface of the water displaced waterproof CENTURIES, lowered pre-prepared dry mixture of the material with floating properties, and a binder (for example, a mixture of cement grade 400 and sawdust in the ratio 1:4). The mixture is left in the well for 5 hours, during this time, she got soaked with water, hardened and formed tube on the surface of the water displaced waterproof CENTURIES, after which the resulting tube is lowered to the detonating cord following action FRI P and fell asleep in the borehole cheap nevodostoykogo CENTURIES - granulit yn-1 - in the amount of 400 kg, required for a quality of the explosion in the passport CENTURIES. Made stemming wells. Before the explosion was the distance measured from the day the surface to the top of the charge in the well. It is during charge of the entire block has not changed. Although some precious CENTURIES was replaced by the cheaper CENTURIES, the quality of training blasted rock ten monitoring wells remained the same as in the rest of the wells.

The inventive method enables you to extend the run of the material from which is made the subject with floating properties, to reduce the cost of production blasting, without reducing the quality of training blasted mass.

The method of forming a combined charge, including the formation in flooded parts of the borehole charge of waterproof CENTURIES, placing on the mirror is displaced upward through the borehole water material with floating properties capable of withstanding the weight of the charge of nevodostoykogo CENTURIES, which lowered nevodostoykogo CENTURIES, characterized in that the pre-mixed material with floating properties, and a binder, the resulting mixture is poured on the surface of the water displaced waterproof CENTURIES after contact with water, the mixture is moistened, it left in the well to the time required for solidification of the mixture on the surface of the water, and after solidification of the mixture at her place nevodostoykogo CENTURIES.



 

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