RU2484251C1 - Anchor support for mine workings - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: anchor support for mine workings includes a bar with grooves and elastic members, a support plank and a tension nut, which are arranged on the bar end projecting into the working-out. The bar is equipped with an internal channel. Elastic members are made in the form of closed elastic covers installed in the bar grooves hydraulically or pneumatically connected to the internal channel of the bar, which is sealed with a plug or a valve.

EFFECT: simplifying the design of anchor support for mine working-outs and increasing the strength of attachment.

3 cl, 2 dwg

Description

The invention relates to the construction and mining industries, in particular to the anchoring of mine workings.

Known anchor (V.N.Semevsky, V.M. Volzhsky, O.V. Timofeev, A.P. Shirokov, G.I. Kravchenko, B.K. Chukan, S.I. Etingov. Rod support. M. Nedra, 1965, pp. 58-59, Fig. 61), including a rod with a thread on the outer end, a support plate with a bent edge and a tension nut.

The disadvantage of this invention is the complexity of the design and significant labor costs for installing the anchor.

Known steel-polymer anchor (AS SU N 929864, publ. Bull. N 19, 1982), including a reinforcing rod fixed in the hole with a thread at the outer end, a support plate, a tension nut and a sealing collar.

The disadvantage of this invention is the complexity of the design and significant labor costs for installing the anchor.

Known anchor support for mining (patent RU No. 2311535, publ. 27.11.2007). The lining includes a composite rod of two pieces or more pieces of round steel. The end parts of the segments are made in cross section in the form of semicircles, on the flat faces of each of which there are transverse protrusions 5 at an angle of 90 ° to the longitudinal axis of the rod, and are mounted mutually in relation to each other in the connecting sleeve, resting its lower end in elastic circular torus rings . The latter are planted on a segment of the rod with an interference fit below the junction of the segments. Moreover, the front end of the segment is made with a bevel, and at the lower end of the segment protruding into the excavation, a support bar is fixed using a tension nut. The longitudinal axis of the rod at the junction of the end parts of the segments passes through the middle parts of their transverse protrusions, which are made on each of them in the same amount. The total number n of transverse protrusions is determined from the description of the expression given in the text.

The disadvantage of this invention is the complexity of the design and significant labor costs for installing the anchor.

Known anchor support for mining, adopted as a prototype (patent RU No. 2417319, publ. 04/27/2011). Anchor support for mine workings includes a rod with recesses and elastic elements, a support bar and a tension nut located on the end of the rod protruding into the development. In this case, the elastic elements are made in the form of plates installed in symmetrical recesses along the length of the rod, and the plate thickness, plate length and the number of recesses along the length of the rod are calculated by mathematical formulas.

The disadvantage of this invention is the design complexity and insufficient strength of the fastening.

The technical result of the invention is to simplify the design of anchor support for mine workings and increase the strength of fastening.

The technical result is achieved in that the anchor support for mining, including a rod with symmetrical recesses and elastic elements, a support bar and a tension nut located on the end of the rod protruding into the development, is characterized in that the rod is provided with an internal channel and the elastic elements are made in the form closed elastic shells installed in the recesses of the rod and hydraulically or pneumatically connected to the internal channel of the rod, a sealed plug or valve, the diameter d of the shell receive are inequality d≥0,1D, where D - diameter of the hole to set the anchor, m.

Closed elastic shells can be made of an elastic material, such as rubber or rubber.

Anchor support for mining is illustrated by drawings, where in Fig.1 shows a General view after installation, Fig.2 shows a cross section.

The figures show:

1 - hole for installing the rod;

2 - rod with recesses 7 and channel 6;

3 - a supporting level;

4 - a tension nut;

5 - elastic elements in the form of closed elastic shells;

6 - internal channel;

7 - recesses for installing closed elastic elements;

8 - plug or valve;

D - hole diameter 1, m

Anchor support for mine workings comprises a rod 2 with an internal channel 6 and symmetrical recesses 7, into which elastic elements 5, made in the form of closed elastic shells, are installed and fixed, for example, using a threaded connection (not shown conventionally in the drawing). The diameter d of the elastic shell 5 is taken from the inequality d≥0,1D, where D is the diameter of the hole 1 for installing the rod 2, m, to provide a sufficient amount of adhesion of the closed shells of the shells 5 to the rock in which the rod 2 is installed. Using elastic shells 5 of rubber or rubber allows you to create the required value of the friction force without the use of any fixing compounds.

Anchor support for mining works as follows.

In the hole 1, drilled in the roof rocks, having a length sufficient for the operation, the rod 2 is inserted as far as it will go with the elastic elements 5 mounted on it in the form of closed elastic shells. Then, with the help of a compressor or pump, air or liquid is pumped into the inner channel 6 of the rod 2 until the closed or elastic shells 5 are completely or partially filled. The inner channel 6 is sealed with a valve or plug 8. After this operation, a support bar is installed on the protruding end of the rod 2 with a thread 3 and secured with a tension nut 4. Anchor support is checked for pulling force in accordance with known methods and, if necessary, air or liquid is additionally pumped. The rod 2 is held in the hole 1 due to the expansion of the closed elastic shells 5 against the borehole walls 1. The fixing force is created due to the friction force of the elastic material of the closed elastic shells 5 - rubber or rubber against the borehole walls 1. If necessary, the bearing capacity of the rod can be increased by additional injection air or liquid into a closed elastic shell 5. If necessary, remove the anchor, remove the plug or valve 8 and remove the anchor from the hole.

The use of anchor supports for mining provides the following advantages:

- simplification of the design of the device;

- increase the strength of fastening;

- increase the effectiveness of fixing.

Claims (3)

1. Anchor support for mining, including a rod with symmetrical recesses and elastic elements, a support bar and a tension nut located on the end of the rod protruding into the development, characterized in that the rod is provided with an internal channel, and the elastic elements are made in the form of closed elastic shells installed in the recesses of the rod and hydraulically or pneumatically connected to the internal channel of the rod, a sealed plug or valve, the diameter d of the shell is taken from the inequality d≥0,1D, where D is the dia hole meter for installing the anchor, m 2. Anchor support according to claim 1, characterized in that the closed elastic shells are made of an elastic material, for example rubber. 3. Anchor support according to claim 1, characterized in that the closed elastic shells are made of an elastic material, for example rubber.

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