SU989090A1 - Roof bolting - Google Patents

Description

The invention relates to anchor lining of mine workings.

The known anchor lining includes a holding device, a support plate, a tension nut and a rod having a cylindrical bushing with protrusions that rests on the nut and interacts through these protrusions with the C panel. significant deformation

Closest to the invention to the technical essence and the achieved result is anchor lining, comprising a rod and spacer heads 2 installed on it with an interval.

The disadvantage of this support is the impossibility of the sequential commissioning of spacer heads, which reduces the reliability of its operation.

The purpose of the invention is to improve the operational reliability of the lining by successive commissioning of the spacer heads.

The goal is achieved by the fact that the rod is made composite and is equipped with a compliant connecting node.

which is made in the form of a threaded sleeve and a nut screwed onto the sleeve, while the thread of the latter is left-handed with an insertion angle calculated for the nut to unscrew when the critical value of the axial load is reached.

FIG. 1 shows anchoring, general view, in FIG. 2 - node I

10 in FIG. 1, a pliable coupling assembly, in section., Anchor lining consists of a composite rod 1, a pliable coupling assembly 2, spacer heads 15 and a tension device 4. The coupling assembly 2 is a supplementing element and consists of a housing 5, threaded, fixed threaded sleeve 6,

20 internal, the thread of which is right and the external thread of the left is multiple, with a stopping angle designed for self-unscrewing of the movable nut 7 when the axial load is reached

25 critical values. In case 5 and nut 7, the threads are right. The compliance of the connecting unit is regulated by the length of the sleeve 6 and the body 5. The resistance of compliance is regulated

Claims (2)

30 magnitude of the angle of entry of the external thread of the sleeve 6 and the movable nut 7 V body 5 with. On the side of the hole, the shank 8 is screwed in another spacer of the head 3. To reduce the force, the taper between nut 7 and the end of body 5 contains a series of thin ring washers 9 ii bronze, copper, plastic), and between nut 7 and body 5 there is a gap of 0.5-1 mm. The presence of a flexible connector allows the anchor to operate in conditions of significant rock displacements. Moreover, at first, the structure works as anchor bolts when the critical load is reached, the compliance node is triggered, after which the end spreader head of the anchor comes into operation. The number of spacer heads, rod elements and connecting nodes can be increased depending on the working conditions of the support. Anchor lining set as follows. A rod 1 with a spacer head 3 is inserted into the hole, the body 5 of the connecting assembly is screwed onto the threaded end of the rod element, then screwed into the body 5, the thread shank 8 of the other spacer 3 with the rod. After that, the spacers are wedged in the hole and the anchor is tensioned by means of the device 4. Claims of the invention Anchoring, comprising a rod and spacers installed on it with an interval, characterized in that, in order to improve the operational reliability the work of the spacer heads, the rod is made composite and provided with a compliant connecting node, which is made in the form of a threaded sleeve and a nut screwed onto the sleeve, while the thread of the latter is made left-handed with the angle of entry, designed for self-unscrewing of the nut when the critical value of the axial load is reached. Sources of information taken into account in the examination 1. USSR author's certificate number 381785, cl. E 2113 21/00, 1973. 2.Shirokov A.P. Anchor lining in the mining industry. Kemerovo book publishing. 1973, p. 56 (prototype. / t ///////// {// /////// |. 7 / / G., ..,. , „... -Ie u7 //// t