SU1252503A1 - Ferroconcrete roof bolting - Google Patents

Description

FIELD OF THE INVENTION The invention relates to mining, in particular to fastening workings with anchor bolts.

The purpose of the invention is to improve the quality of securing the anchor by reliably sealing the space between the anchor and the walls of the well.

FIG. 1 shows an anchor with a device for sealing a well, a general view; in fig. 2 shows section A-A in FIG. one.

The reinforced concrete anchor consists of a supporting element 1, the locking part of which is monolithic hardening m with solution 2 and a sealing element in the form of a rubber sealing cuff 3, having a funnel-shaped recess on the side of the wellhead with longitudinal cuts, and an abutment ring 4 made of a coil of wire left winding and mounted on the rod. 1 at a distance equal to the depth of the well in the idle.

The installation of the anchor is carried out as follows.

Cartridges are introduced into the drilled well with a rapid hardening in the holding and fixed from falling out by a special stop (not shown). Then, the supporting element I is introduced into the borehole 5 in the form of a metal rod, at the end of which a seal is installed. On the cuff 3. The rod is connected with an adapter to a hand-held drill or a special device for installing anchors and fed into the well.

When vra1tsatelno-11 available movement of the rod 1 in the well 5 bearing element destroys the shell of ammunition, mixes and activates the mixture. The seal-cuff 3 is packed in the formed

0

hardening mass and, like a piston, it is pressed to the thrust ring 4 fixed on the p tanga at a distance equal to the depth of the niriypa cartridges multiplied by the coefficient of hardening mass output, which is assumed to be 0.65-0.9 depending on the rod diameter and of the type in the holding case, with the retaining ring 4 coming into contact with the inner surface of the cuff 3 and bursting it into the walls of the well. This achieves the necessary sealing of the well at a predetermined distance from its mouth and jamming of the rod, as a result of which the reliability of fixing the anchor is increased and there is no need to fix the tangi until the setting of the hardening mass is completed within 30-40 seconds.

As the bench tests show, the task can be successfully solved by applying the proposed design of a sealing cuff and an anvil ring made of a coil of a left-handed wire spiral.

In this case, due to the misalignment of the spiral winding directions (left) and the iiKMine ptangi (right) cuff, it is thrown off by the spiral and moves the lip of the well along the bar B1 until the resistance of the compacted mass exceeds the reactive force developed by the other spiraling. Thereafter, the coil is inserted into the funnel-shaped recess of the cuff and spreads it into the walls of the well.

The application of the proposed device will improve the quality of securing the anchors on the hardening in the gangway and reduce the time spent on their installation in 30 seconds.

(ocTaBHT (iij I l. bept iKnna

Editor A, SaboG Chre.1 And Bi tt4-Corrsmo; li (lshinka

Zakuz 4t) 02, 35 Circulation 47011ol1Zh1N NVNIIPI State Committee (, SSR

on 13 acquisitions and discoveries

113035, Moscow. Zh-35, Raushsk nab. 4;, t

Branch PPP "Patent, Uzhgorod, st. Project, 4

2

Claims (1)

REINFORCED CONCRETE ANCHOR, including a supporting element with a homogeneous homogeneous hardening mortar, a locking part and a thrust ring and a rubber sealing collar placed on it in contact with the walls of the well, characterized in that. in order to improve the quality of anchor fixing by ensuring the reliability of sealing the space between the anchor and the walls of the well, the rubber sealing cuff is made in the form of a sleeve with a funnel-shaped recess and longitudinal slots, while the larger base of the funnel-shaped recess and longitudinal slots are located on the wellhead side, and the thrust ring is made from a coil of wire spiral left winding. yu sp u sl o about GO Fig 7