CN201560781U - Roadway support device for gob-side entry retention in semi-coal rock - Google Patents

Abstract

The utility model belongs to the field of underground roadway support device for coal mine, particularly relates to a gob-side entry retaining roadway support device for half coal rock, which is characterized by comprising a roof beam and an upper side beam, wherein both the roof beam and the upper side beam are provided with anchor rope holes; and anchor ropes penetrate through the anchor rope holes and are respectively connected with the roof beam and the upper side beam through recyclable anchorage devices. The gob-side entry retaining roadway support device has the advantages of reasonable structure, convenient use, safety and reliability, and low cost.

Description

Roadway support device for gob-side entry retention in semi-coal rock

technical field

The utility model belongs to the field of support devices for underground roadways in coal mines, in particular to a roadway support device for retaining roadways along the gob of semi-coal rocks.

Background technique

Due to the short service life of the half-coal and rock-side gob-side entry roadway in the coal mine, its support forms are mainly passive support forms such as wooden brackets and steel frames to passively withstand the mine pressure, so the maintenance of the roadway is large, and the support and maintenance costs Higher, although the use of retractable steel frames in large mining groups has improved the shortcomings of this passive support to a certain extent, and at the same time increased the recycling rate, but in small coal mining enterprises, the use of retractable steel frames is one-time The investment is too large, and it is difficult to play a role in the recycling and reuse of materials due to the lack of equipment and technology, so wood support materials are often used instead. In recent years, the state has explicitly banned the use of wood support materials. It is imperative to reform the roadway support of Yanyan goaf retaining roadway.

Utility model content

The purpose of the utility model is to provide a semi-coal and rock gob-side entry roadway support device with large bearing capacity, high strength, safe and reliable use, and convenient material recovery and reuse in the small coal mine.

The utility model is achieved through the following technical solutions:

That is, a kind of roadway support device for half-coal and rock gob-side entry retention, which is characterized in that it includes a roof beam and an upper beam. Both the roof beam and the upper beam are provided with anchor holes, and the anchor cables pass through the anchor holes and pass through the recyclable anchors. The tools are respectively connected with the roof beam and the upper side beam.

The distance between the anchor holes on the roof girder is 1700mm, and they are evenly arranged in the middle of the length direction of the roof girder.

The distance between the anchor holes of the upper rail is 1000mm, the anchor holes are arranged from the end of the upper rail, and the distance between the anchor holes near the end of the upper rail is 300-400mm.

Both the roof beam and the upper side beam are I-beams.

The anchor cable is braided into a steel wire rope by multiple strands of ￠18.5mm steel wire rope.

The utility model is a supporting whole composed of recyclable anchors, anchor cables, roof beams and upper side beams, which is used for roadway support along the goaf. The roof girder and the upper girder use 24H I-beam with a length of about 2.5 meters. The anchor cable material uses the old ￠18.5mm steel wire rope programming steel wire rope instead of the threaded steel anchor. and steel girders are recycled and reused.

The utility model has the advantages of reasonable structure, convenient use, safety and reliability, and low cost. On the one hand, the utility model changes the passive support mode of the original semi-coal and rock-side gob-side roadway, and changes the passive support into active support, which fully guarantees the integrity of the original roadway and the overall support strength of the roadway. And achieve the perfect combination of pressure bearing and yielding pressure. At the same time, the support structure is reasonable, easy to use, safe and reliable, and can recycle and reuse the recyclable anchors, roof beams and upper side beams, which greatly reduces the space left The amount of maintenance work for the lane is reduced, and the consumption of support materials is reduced.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

As shown in the figure: 1-1 anchor cable; 1-2 anchor cable; 2-1 upper beam; 2-2 roof beam; 3-1 recyclable anchor; 3-2 recyclable anchor.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further elaborated.

As shown in the accompanying drawings: the utility model consists of an anchor cable 1-1, an anchor cable 1-2, an upper side beam 2-1, a roof beam 2-2, a recoverable anchor 3-1, and a recoverable anchor 3 -2 together form a supporting whole. According to the anchoring force and maximum tensile strength requirements stipulated in the regulations, the anchor cable 1-1 and anchor cable 1-2 adopt the old ￠18.5mm steel wire rope, and the length is 2.5m-3m according to the design calculation of the maximum loose circle. 2-1. The roof beam 2-2 adopts 24H I-beam with a length of about 2.5 meters. When the anchor cable holes are arranged, the distance between the two anchor cable holes of the roof beam 2-2 is 1.7 meters, and they are evenly arranged on the length of the roof beam 2-2. The middle position of the direction; the distance between the anchor holes of the upper beam 2-1 is 1.0 meters, and the distance between the anchor holes near the end of the upper beam 2-1 is 300~ 400mm.

When the utility model is in use, at first the anchor cable holes are drilled, and when the anchor cable holes are arranged, the anchor cable holes of the roof beam 2-2 will be in the upper position in the middle of the roadway width direction, and the two anchor cable holes will be on a straight line, and The vertical roof beam 2-2 is arranged; the anchor cable holes of the upper side beam 2-1 shall be arranged downward from 400mm below the coal seam floor, and the two anchor cable holes shall be on a straight line, and shall be arranged vertically on the upper side beam 2-1 . Then put the anchoring agent first, then insert the anchor cable 1-1, anchor cable 1-2 and stir evenly with the anchor cable machine, install the upper beam 2-1, roof beam 2-2 and back plate, and use the tensioner to pass through the Tight retrievable anchor 3-1 and retrievable anchor 3-2 can fix the upper side beam 2-1 and roof beam 2-2 firmly. When the support damage is small, it can still be used as support for the gob-side retaining roadway only for simple undercover and maintenance.

Claims (5)

1. one and half coal petrography gob side entry retaining roadway support devices is characterized in that comprising top board beam and last group beam, are equipped with the anchor cable hole on top board beam and the last group beam, and anchor cable passes the anchor cable hole and is connected with last group beam with the top board beam respectively by the recuperability ground tackle.

2. half coal petrography gob side entry retaining roadway support device according to claim 1 is characterized in that the anchor cable pitch of holes on the described top board beam is 1700mm, and is arranged in the centre position of top board beam length direction uniformly.

3. half coal petrography gob side entry retaining roadway support device according to claim 1, it is characterized in that the described anchor cable pitch of holes that goes up group's beam is 1000mm, the anchor cable hole begins to arrange from last group beam-ends head, and the anchor cable pitch-row of close last group beam-ends head is 300 ~ 400mm from the termination.

4. half coal petrography gob side entry retaining roadway support device according to claim 1 is characterized in that described top board beam and last group beam are i iron.

5. half coal petrography gob side entry retaining roadway support device according to claim 1 is characterized in that anchor cable weaves into steel wire cable by multiply ￠ 18.5mm wire rope.

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