RU2295700C2 - Device for localization of components of blast hole net - Google Patents

Abstract

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

SUBSTANCE: the device for localization of components of the blast hole net has a cylinder, bearing rod with a spacer installed in its axis for rotation and a detachable cover. The device is provided with a metal shell with a spider installed in its lower part, a bearing rod is fastened on it, the cylinder in its axis is cut in pieces, which are fastened to the spider by pins. The spacer is made in the form of cams fastened on the bearing rod, flanges for fastening of the power pipe with a pusher and a spring are made opposite them on the cut pieces of the cylinder, and the detachable cover is installed on the shell and provided with a locking component.

EFFECT: enhanced reliability of protection of the blast hole net against unauthorized use from the moment of hole charging to the beginning of laying of the surface blast net, enhanced safety of blasting operations.

5 dwg

Description

The invention relates to the field of drilling and blasting in strong rocks and can be used in various industries using blasting in rock massifs of rocks.

When preparing mass explosions with explosive charges of a large number of wells for several days, the need arises for the constant protection of the charged blocks due to the presence on the ledge of the elements of the borehole blast network — parts of detonating cords (LH) emerging from the wells from the militants [ one]. These elements may be unauthorized to be used, and in case of possible arrivals on the main guns of charging and clogging machines, there is a danger of premature explosion of the charge. To eliminate these drawbacks, it is necessary to reliably localize the elements of the downhole blast network on the surface of the ledge.

Known cover-pointer charged wells, including a cylindrical body and a cover, which, in order to increase the safety and reliability of blasting, is equipped with a spacer located in the lower part of the body and connected by traction to the cover, in which a sealed cavity is made [2]. The device is inserted into the mouth of a charged well, which is not 0.5-0.6 m full of stemming, the DS is placed in an airtight cavity and the expansion device is burst by turning the rod with the help of a figured nut. It will protect the LH from jamming and, according to the developers, will protect the LH from accidental collisions of mining vehicles and will serve as an indicator for finding a well in difficult weather conditions.

If you can agree with the last argument, then the protection against collision is doubtful, since the device rises above the well and will inevitably be crushed by heavy mining vehicles, especially in difficult weather conditions. In addition, it will not be difficult to open the device and remove the DS from it, because the nut does not protect against unauthorized access.

The technical problem to which the invention is directed is to increase the safety of blasting operations due to the reliable shelter of the elements of the explosive network before the installation of the surface explosive network.

The problem is achieved in that in a device for localizing elements of a borehole blast network, including a cylinder mounted on its axis with the possibility of rotation of the supporting rod with a spacer and a removable cover, according to the invention, the device is equipped with a metal shell with a cross installed in its lower part, on which the supporting rod is fixed, while the cylinder along its axis is cut into parts that are attached to the cross with pins, the spacer is made in the form of fixed on the carrier second cam rod, which is opposite to the cut parts of the cylinder provided with protrusions for fastening power tube with a pusher and a spring, and a removable cover is attached to the shell and is provided with a locking element.

Figure 1 schematically shows a device for the localization of elements of a borehole blast network in a well before it is installed, in figure 2 - in a working position, after expansion into the walls of a well, in figure 3 - after localization of elements of a borehole blast network, in figure 4 - section along aa in figure 1, figure 5 - section along bb in figure 2.

A device for localizing elements of a borehole blast network includes a cylinder 1 made of metal or plastic mass with a diameter of 4-8 mm less than the diameter of the well and cut along the longitudinal axis, for example, into 3 parts. A support rod 2 with cams 3 is mounted on its axis, on which pushers 5 are mounted using pins 4, inserted into the power pipe 6, which is fixed at the opposite end by a pin 7 on the protrusion 8 of the cylinder 1. Inside the power pipe 6, between the pusher 5 and the protrusion 8 is placed spring 9. On the cams 3, latches 10 are made. The support rod 2 is mounted on the crosspiece 11, mounted in the lower part of the metal shell 12 with the help of washers 13 with the possibility of rotation, and has a socket key in the upper part of the face 14. Tubes 15 are fixed on the crosspiece 11, into which the pins 16 are inserted from the parts of the cylinder 1. In the shell 12, a hole 17 is made under the pin 18 of the removable cover 19 provided with a locking element 20, and a protrusion 21 under the tongue of the locking element 20.

A device for the localization of elements of a downhole blast network is used as follows. On the surface of the block it is assembled into a structural element. To do this, the pins 16 of the parts of the cylinder 1 are inserted into the tubes 15, the initiating pulse conductor 22 (the waveguide of the non-electric system or the detonating cord) is passed through the cylinder 1 and in this form the device is lowered into the well 23 to a certain depth, until the stop 24.

After that, with the help of faces 14, the support rod 2 is turned with the faces 14 until the stoppers 10 rest in the power pipe 6. In this case, the cams 3 are rotated and burst the split parts of the cylinder 1 into the walls of the well 23 using the power pipe 6, inside which the spring 9 is compressed. The latches are made so that when they abut the pin 6, the pin 4 is located behind the axial line of the power pipe 6, which prevents the cams 3 from turning back due to the compressed spring 9. Since the upper part of the well, where the device for localizing elements of the downhole blast network is located, is located in the part of the ledge disturbed by previous explosions, there are often wall outfalls, they are uneven. Therefore, when meeting any part of the cylinder 1 of such a collapse, the spring 9 straightens and pushes the specific element of the cylinder 1 further, until it contacts the wall of the well 23. At the same time, the power pipe 6 slides along the follower 5 and the device bursts tightly in the well. After that, the conductor of the initiating pulse 22 is rolled into a cove, laid in the cavity of the metal shell 12, the pin 18 of the removable cover 19, made with a smooth surface along the diameter of the shell 12, is inserted into the hole 17, and the tab of the locking element 20 is latched over the protrusion 21. The initiating pulse conductor 22 is reliably protected - the device is installed deep in a narrow well, the lid is closed by a locking element, there are no protrusions on it. The implementation of the cover the size of the outer diameter of the shell 12 protects it from a possible act of vandalism (intentional exposure to jamming, for example, scrap with a crowbar). The mechanical protection of the downhole blast network will make it possible to abandon the armed guard and increase the reliability of the storage of explosive materials on blocks, since recently the human factor has become increasingly the reason for the theft of explosive materials.

Before starting the installation of the explosive network, the locking element of the device is unlocked, the cover 19 is removed using the key in the lock as a handle. By turning the cams 3 in the opposite direction, the device spacer is removed into the borehole walls, the end of the initiating pulse conductor is turned and removed from the shell 12, and the device is removed from the well for reuse. Then proceed with the installation of the surface explosive network in the usual manner.

Thus, the inventive device for the localization of the elements of a borehole blast network allows you to reliably protect the borehole blast network from unauthorized use from the moment of charging the wells to the beginning of the installation of a surface blast network, increasing the safety of blasting operations, thereby achieving the technical task.

Information sources

1. Babayants G.M., Evsin V.G., Nikolaev K.P. Improving blasting in mining enterprises // Mining Journal. 1995. - No. 12.

2. Cover pointer charged wells. A.S. USSR No. 727849. E 21 C 37/00, F 42 D 5/04. 1980 (prototype).

Claims (1)

A device for localizing elements of a borehole blast network, including a cylinder mounted on its axis with the possibility of rotation of the supporting rod with a spacer and a removable cover, characterized in that the device is equipped with a metal shell with a cross installed in its lower part, on which the supporting rod is mounted, this cylinder along its axis is cut into parts that are attached to the crosspiece with pins, the spacer is made in the form of cams mounted on a support rod, opposite which at times ezannyh parts of the cylinder provided with protrusions for fastening power tube with a pusher and a spring, and a removable cover is attached to the shell and is provided with a locking element.

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