RU76073U1 - TEMPORARY SAFETY FASTENERS AT THE CONSTRUCTION OF A PERMANENT ANCHOR FASTENERS - Google Patents

Abstract

The temporary safety lining contains suspensions (fast-mounted brackets) fixed to the elements of the constant lining for beams on which a protective ceiling is installed.

A threaded hole is formed in the upper part of the suspensions for the shanks of the permanent support anchors, and the protective overlap is made in the form of strips of nets laid on retractable beams.

Description

The utility model relates to the mining industry, in particular to the means of fastening horizontal and inclined mine workings, carried out by a blasting method, namely to temporary safety supports.

Known temporary safety support (see USSR author's certificate No. 2321177, IPC E21D 19/04), for mining, including a protective ceiling, a beam mounted on suspensions (hanging quick-mount brackets) with the possibility of moving in the longitudinal direction of the mine. The protective ceiling is suspended on the beams, and the beam suspensions are fixed to the top of the arch arch of the permanent lining.

The design of temporary safety supports is complex and massive and can only be used in the construction of elements of permanent support at the bottom of the mine.

The closest technical solution is the construction of a safety lining for horizontal mine workings, including a protective overlap on beams mounted on suspensions with the possibility of independent movement in the longitudinal direction of the mine (see Karetnikov V.I., Kleimenov V.B., Nuzhikhin A.G. Mounting of capital and inclined mine workings. - M .; Nedra, 1989, pp. 92-93).

The purpose of the utility model is to simplify the design and the possibility of using anchor and combined anchor-metal support for fastening workings.

In the utility model, which includes well-known features: extendable cantilever beams on suspensions fixed to permanent support elements, a protective overlap, the goal is achieved by the fact that a threaded hole for the anchor shanks is formed in the upper part of the suspensions, the protective overlap is formed by strips of mesh laid on the beams.

Figure 1 shows the position of the temporary protective lining after breaking the rock, and figure 2 - after installing the retractable beams in the chest of the face and laying the protective floor.

Figure 3 shows the position of the retractable beams after the construction of the anchor lining.

Figure 4 shows the position of the retractable beam on the suspension.

Temporary safety support consists of three retractable beams 1 made, for example, of a special profile, suspensions 2 with a threaded hole 3 for shanks 4 anchors 5 with washers 6 for pressing nuts 7 of mesh 8 to the roof of the mine.

Temporary safety support works as follows.

Three retractable beams 1, slightly longer than the double value of the rock breaking, are each suspended on two suspensions 2, mounted on the shanks of 4 anchors 5 in the threaded hole 3.

After blasting, the beams 1 are pulled out into the bottom of the face and several strips of net 8 are laid on them, which hangs from the extreme beams 1. The strips of the net 8 are fastened from slipping between themselves and the previously fixed net with a knitting wire. Then drill holes to install anchors between the beams 1.

Washers 6 on these anchors press the mesh 8 to the roof of the mine, raising the mesh 8 above the retractable beams 1, which can be moved away from the bottom for drilling holes and installing beams of anchors 5 in the suspension plane, on the closest of which suspensions 2 are installed in the bottom chest for fastening retractable beams 1.

Depending on the condition of the roof and the manifestation of rock pressure, drilling holes in the plane of the arrangement of retractable beams for anchors for which suspensions 2 are not attached, possibly with a lag from the bottom.

Since the suspensions 2 to support the beams 1 can experience double the load from the weight of the beams and the weight of the exfoliated rock of the roof before installing the anchors, the suspensions must have sufficient strength and be calculated based on the breaking strength of the anchor shank.

Claims (1)

Temporary safety support for the construction of a permanent anchor support, including retractable cantilever beams on suspensions fixed to the elements of the permanent support, a protective overlap, characterized in that a threaded hole for the anchor shanks is formed in the upper part of the suspensions, and the protective overlap is formed by strips of mesh laid on the beams .