SU798312A1 - Anchorage roof support - Google Patents

Description

(54) ANCHOR STRAP

one

The invention relates to the fastening of underground mine workings, namely anchoring.

Known anchor lining, including a core with a wedge-shaped head and semiproms mounted on it, having a landing nest with a two-sided slant and outer semicircular protrusions of triangular section fl

The disadvantage of such lining is that with a decrease in the diameter of the well, the strength of its fixing due to the deformation of the semi-sleeves decreases, which become insufficiently rigid.

Also known is another roof bolting comprising a set .skvs1zhine rod with a head having a spigot portion, the transition boiling in klinokonicheskuyu two impaled on the head half sleeve "with the outer triangular semicircular protrusions, which base soprzheny cylindrical surface half sleeves, washer mounted on the projecting end rod, and the nut 23 screwed on it.

The disadvantage of this support is the fragile fixing in small diameter wells due to the deformation of the semi-sleeves due to the small thickness of their walls and the contact area of the rod head.

The purpose of the invention is to provide 5 strong securing of anchor bolts in small boreholes.

This is achieved by the fact that the head of the rod is made with longitudinal double-sided grooves for creating thickenings along its edges, and the walls of the semi-plugs have longitudinal thickenings located opposite the thickening of the heads of the rod, while the double-sided grooves are parallel to each other on the flat-cylindrical part of the head and inclined on the clinorochnical parts, and the longitudinal, thickening of the wall with a koyikda half-sleeve is made convex in the form of a cylindrical surface, eccentric relative to the cylindrical surface of the half-sleeve, encompassing along the edges of the bulge and adjacent to the tops of the projections.

FIG. 1 shows schematically anchor bolts, general view; in fig. 2 - the same, another projection; in fig. 3 is a view of the inner side of the half sleeve; FIG. 4 - transverse

section bb in fig. 3 in FIG. 5 is a cross section aa in FIG.

Anchor bolt consists of a rod 1 with a head, two oluvtulok 2, washers 3, installed on the protruding end of the rod 1, and screwed on the back of the nut 4. The head of the rod has a flat-cylindrical part 5, passing into the wedge-conical part 6, on which half-sleeves 2 are mounted. The rod head is also provided with stamped double-sided longitudinal grooves 7 for creating thickenings 8 along its edges. The grooves 7 are parallel to each other on the flat-cylindrical part 5 of the head and obliquely - on the wedge-conical part 6. The semi-sleeves 2 have external There are half flanges in the protrusions 9, the bases of which are coupled with the cylindrical surface of the half bushings 2. In order to increase the rigidity of the walls, the half bushings 2 are provided with longitudinal thickenings 10 located against the thickenings 8 of the rod head. The thickening 10 of each half-sleeve 2 is made in the form of a cylindrical surface eccentric with respect to the cylindrical surface of the semi-sleeves 2, intersecting it along the edges of the thickening 10 and adjoining the tops of the projections 9.

Anchor lining set as follows.

The rod .1 with the papuvs 2 mounted on it is inserted into the installation pipe and inserted into the well. At the time of the stop of the head of the rod 1 into the bottom of the well, the half-sleeve 2 is displaced along the axis of the rod 1 by means of a pipe and wedged. Then the mounting plate is removed, ngchevayut on the protruding end of the rod 1 washer 3,. screwing and tightening the nut 4. When the nut L is tightened, the clincher portion of the head of the rod 1 slips relative to the half-sleeves 2 and creates a thrust force transmitted

through the half sleeve to the borehole wall. A maximum spread is achieved on the flat-cylinder part 5 of the head.

Claims (3)

Invention Formula 1, Anchor lining, an inclusive nail-mounted rod with a head having a flat-cylindrical part converting into a v-conical, two semi-sleeves mounted on the head with outer semi-annular projections, the bases of which are coupled with the cylindrical surface of the half-sleeve, a washer mounted on the protruding end of the rod, and the nut screwed on it, which is made up with the fact that, in order to ensure a strong fixing in small-diameter wells, the rod head is made with longitudinal double-sided grooves for tribute to thickenings 0 along its edges, and the walls of the semi-sleeves have longitudinal thickenings located against the thicknesses of the rod head. U. 2. Anchor lining in accordance with claim 1, wherein the two-sided grooves are arranged parallel to each other on the flat-cylindrical part of the head and obliquely on the wedge-conical part. 3. Anchor lining according to claim 1, wherein the longitudinal wall thickening of each half-sleeve is made convex in the form of a cylindrical surface eccentric with respect to the cylindrical surface of the half-sleeve intersecting it along the edges of the thickening and conjugated to the tops of the projections. Sources of information taken into account in the examination 1. Authors certificate USSR 0 1219508, cl. B 21 D 21/00, 1967. 2. Shirokov A.N. Anchor lining in the mining cursed, Kemerovo, Kemerovo Book Publishing House, 1973, p. 58-62.