Combined organic plug

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.

EFFECT: increased reliability of detonation productions enclosure in a charging cavity to the moment of complete destruction of adjacent rocks with a combined plug.

2 cl, 3 dwg

 

The invention relates to the field of drilling and blasting operations in strong rocks in quarries and can be used in a variety of industries, using blasting in hard rock masses.

Known suspension stemming of blast holes, including a cylinder with an axial cavity having a conical extension, in which you have at least three longitudinal slots, and the bottom in the axial cavity of the hollow cylinder is inserted spacer cone, connected to a pull rope, the upper end attached to the lever mounted on the base plate, with the cable rod passes through the spacer tube mounted on the base plate, and through the collet grip, and the upper end of the rope is connected with earring holes /1/. This stemming blast holes allows you to lock the products of an explosion into the charging cavity to the destruction of the array and thereby to improve the energy efficiency of blast fragmentation of rocks.

The disadvantage of this design is the poor adhesion of the cylinder walls with the walls of wells of damaged structure (wood thrown out of the walls), as well as the complexity of the design with a collet grip.

The closest essentially solved problem with a device for locking the products of an explosion into the charging cavity well is a suspension stemming representing a split cylinder with not less is it than the three longitudinal grooves and a tapered extension cavity down from the bottom the bottom of the cavity split hollow cylinder is inserted spacer cone, connected to a pull rope upper end fixed on a tripod /2/.

A disadvantage of this device, taken as a prototype of the proposed invention is also a bad clutch cylinder wall with the walls of wells of damaged structure (wood thrown out of the walls), forcing to put stemming depth, and performing stemming from a metal that is not acceptable when loading rock mass on the crusher possible losses stemming in the rock mass and hit her as uncrushed body to the crusher. In addition, to secure the tamping in the well requires a special device, which complicates the manufacturing technology works.

The technical task to be solved by the invention, is to increase the reliability of the locking of detonation products in the charging cavity until the complete destruction of the surrounding rocks combined stemming composed of the filling and tamping backfill part in it and above it.

The task is achieved by the combined organic stemming, including a spacer portion in the form of a cylinder, a cavity whose bottom is assembled, the cone is connected with a pull rope according to the invention the cylinder is made in the form of a cover made of soft material, for example of p is now fabric, the upper part of the cover provided with a split ring of resilient material on the diameter of the hole, and the lower cord, spacer cone made of organic material, for example plastics or wood, with a groove in the middle part, and the inside of the cover and above the spacer part of the place they are part of, for example, from cuttings.

Spacer cone made biconical, with the angle of the taper above the groove is smaller than under it.

1 schematically depicts a spacer portion of the tamping after lowering into the borehole to a predetermined depth, figure 2 combined organic stemming in position in the borehole, figure 3 - position of the combined organic tamping after detonation of the explosive charge.

The spacer of the combined organic stemming includes a case 1, made for example from a dense fabric. At the top edge of the cover 1 is inserted split ring 2 according to the diameter of the hole of the elastic material such as spring wire, and the lower edge of the cover 1 is equipped with a cord 3. Spacer cone 4 is made of an organic material, such as plastic, wood and the like, and provided with a groove 5 in the middle part. In the upper part of the spacer cone 4 is fixed ring 6 to attach the rope 7.

The combined organic stemming works as follows. the hole 8 is lowered action 9 on the conductor initiating impulse 10, for example, detonating cord or waveguide, and place an explosive charge (CC) 11. After that, on the surface of the spacer block of the combined organic stemming gather in a constructive element. For this traction cable 7 is attached to the ring 6 spacer cone 4 and pass it through the case 1, put the bottom part of the cover 1 spacer cone 4 and knotted cord 3 in the groove 5. Then the assembled spacer portion traction on the cable 7 is lowered into the well 8 to a predetermined depth due to the weight of the spacer cone 4. The upper part of the cover 1 is pressed against the borehole walls 8 of the elastic split ring 2, slip on them, copying the roughness of the borehole walls and being open. In the case of hooking the top of the case when lowering can push the spacer cone sixth. Then a pull rope 7 is lifted by 0.2-0.3 m spacer cone 4 and begin to pour into the well 8 charging portion 12, such as drill cuttings. Filling the pouch 1, a charging part 12 straightens it clings to the walls and filling the groove 5 spacer cone 4, provides jamming of the spacer part in the hole 8, thus forming the combined organic stemming. Then traction cable 7 connected to the surface system later retrieval stemming from blasted rock mass, for example, ropes, tires, etc. (not shown), and the cavity is well over 8 spacer part to the mouth is filled with loose material charging section 12. The combined organic stemming ready for use.

After detonation of the explosive charge in the charging cavity dramatically increases the pressure of detonation products to values of a few tens of thousands of atmospheres and dynamic kick gas 13 to the spacer cone 4, which leads to pushing it in the charging portion 12 of the cover 1 by a certain amount and increasing, thus, the thrust tamping in the borehole wall. Charging part stemming this hardens, forming a "tube" 14, preventing further displacement of the spacer portion of the tamping up and break gas blast through the wellhead. In this position the spacer portion of the tamping remains until the beginning of the destruction of the walls of the well and break part of the products of detonation of the charge cavity to the atmosphere through cracks in the broken array. At this point, the clutch cover 1 with divergent walls of the borehole 8 is broken and the spacer cone 4 combined organic stemming begins to shift under the influence is still very high pressure of detonation products up through the borehole, creating again the "stopper" 14 because the upstream charging part 13 prevent its departure. This ensures long-term isolation of the charging Polo is ti, which contributes to a more complete course of secondary reactions in the detonation products and accordingly raises the energy of the explosion; this is especially important for modern coarse CENTURIES types of granulite and ramonito that have a significant share of the energy released in the process of secondary reactions. In the further destruction of the array charging part 13 crumbles and spacer cone 4 can be ejected from the bore 8 on the surface of the rock mass or remain in the rock mass at shallow depths.

After the explosion spacer cone extract using surface extraction system of blasted rock for reuse. In case of no detection, it can be shipped with a mass of rock, not representing a danger to the crusher.

Thus, the claimed combined organic stemming allows you to securely lock the products of an explosion into the charging cavity to the destruction of the array and thereby to provide the solution of a technical problem.

Sources of information

1. Suspension stemming blast holes: RF Patent №2285898, IPC F42D 1/08. 2006.

2. Suspension stemming: RF patent №2286534, IPC F42D 1/08. 2006 (prototype).

1. The combined organic stemming, including a spacer portion in the form of a cylinder, a cavity whose bottom is assembled, the cone is connected with a pull rope, different those who, the cylinder is made in the form of a cover made of soft material, for example made of thick fabric, the upper part of the cover provided with a split ring of resilient material on the diameter of the hole, and the lower cord, spacer cone made of organic material, for example plastics or wood, with a groove in the middle part, and the inside of the cover and above the spacer part of the place they are part of, for example, from cuttings.

2. The combined organic stemming according to claim 1, characterized in that the spacer cone made biconical, with the angle of the taper above the groove is smaller than under it.



 

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