CN108457686A - A kind of balanced type Telescopic movable supporting arch up and down - Google Patents

Abstract

An up and down balanced telescopic movable supporting arch, comprising a steel frame with a telescopic structure, the steel frame includes two vertically arranged vertical steel frames and an arc top fixedly connected to the upper ends of the two vertical steel frames Arch frame; the opposite side walls of the two vertical steel frames are provided with a driving device that drives the vertical steel frame to expand and contract in the vertical direction; the arc top arch frame is provided with a drive device that drives the arc top arch frame to expand and contract; There are many through holes on the side wall where the steel frame is in contact with the roadway wall. The inner sides of the two vertical steel frames are vertically fixed with horizontal connecting frames. The bottom of the horizontal connecting frames is equipped with universal wheels. The horizontal connecting frames on both sides A driving device is also fixed between them, and the driving device is arranged horizontally perpendicular to the vertical steel frame, and the two ends of the driving device are respectively fixed on the horizontal connecting frames on both sides. The arch frame of the present invention is simple in structure, convenient to install, and can be recycled after being disassembled, thereby reducing support cost.

Description

An up and down balanced telescopic movable support arch

technical field

The invention relates to the field of underground support in coal mines, in particular to an up and down balanced telescopic movable support arch.

Background technique

Accidents on the roof of the excavation head have been threatening the life safety of underground personnel, and happen frequently. Roof accidents refer to casualties, equipment damage, production suspension and other accidents caused by the accidental fall of the roof during the underground coal mining process. Before the implementation of fully mechanized mining, roof accidents accounted for a high proportion of coal mine accidents, up to 75%. With the use of hydraulic supports and the deepening and gradual improvement of roof accident research and prevention technology, the proportion of roof accidents has declined, but it is still one of the main disasters in coal mine production, and the heading head is one of the most dangerous places. One, roof accidents happen from time to time. As the mining depth increases, the prevention of tunneling head roof accidents becomes more important. At present, the pillars used in the working faces of most coal mines are still relatively outdated, and the pillars are basically manually operated, so that it is easy to bury the hidden danger of roof fall accidents.

Contents of the invention

The object of the present invention is to propose an up and down balanced telescopic movable support arch to effectively ensure the relative safety of personnel on the excavation face.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

An up and down balanced telescopic movable supporting arch, comprising a steel frame with a telescopic structure, the steel frame includes two vertically arranged vertical steel frames and an arc top fixedly connected to the upper ends of the two vertical steel frames Arch frame; the opposite side walls of the two vertical steel frames are provided with a driving device that drives the vertical steel frame to expand and contract in the vertical direction; the arc top arch frame is provided with a drive device that drives the arc top arch frame to expand and contract; There are many through holes on the side wall where the steel frame is in contact with the roadway wall. The inner sides of the two vertical steel frames are vertically fixed with horizontal connecting frames. The bottom of the horizontal connecting frames is equipped with universal wheels. The horizontal connecting frames on both sides A driving device is also fixed between them, and the driving device is arranged horizontally perpendicular to the vertical steel frame, and the two ends of the driving device are respectively fixed on the horizontal connecting frames on both sides.

Preferably, the driving device is a hydraulic pump or a telescopic cylinder.

Preferably, the bottom of the vertical steel frame is provided with wheels, and it is preferable to lay a track on the ground of the roadway to guide the moving direction of the arch.

The beneficial effects of the present invention are:

(1) The steel frame is retractable. The driving device on the arc top arch drives the arc top arch to be close to the roadway wall when it is extended. With the driving device between the two vertical steel frames, the driving device drives the arc top arch horizontally. When stretched, the two vertical steel frames can be close to the side wall of the roadway, and when shortened, the overall width of the steel frame can be reduced to facilitate adjustment and moving of the bracket; the driving device on the vertical steel frame drives the vertical steel frame to extend and close to the roadway wall When shrinking, it can be disassembled and disassembled or the bracket can be adjusted; in this way, the top plate and the two sides can be well supported.

(2) The arch frame can be disassembled and recycled to reduce support costs.

(3) The structure is simple and the installation is convenient. The number of steel frames to be installed can be determined according to the stress of the surrounding rock of the roof and the stress of the two sides.

Description of drawings

Fig. 1 is a front view of a vertically balanced telescopic movable supporting arch of the present invention.

Fig. 2 is a side view of a vertically balanced telescopic movable support arch of the present invention.

Among the figure: 1-steel frame, 101-vertical steel frame, 102-arc arch, 2-driving device, 3-wheel.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some, not all, embodiments of the present invention.

Referring to accompanying drawings 1 and 2, the present embodiment provides a kind of up and down balanced telescopic mobile support arch frame, which includes a steel frame 1 with a telescopic structure, and the steel frame 1 includes two vertically arranged vertical steel frames 101 And the arc-top arch 102 fixedly connected to the upper ends of the two vertical steel frames 101; the opposite side walls of the two vertical steel frames 101 are provided with a driving device 2 for driving the vertical steel frames 101 to expand and contract in the vertical direction; The arc top arch 102 is provided with a driving device 2 for driving the arc top arch 102 to expand and contract; the side wall of the steel frame 1 in contact with the roadway wall is provided with a plurality of through holes 103, and the inner sides of the two vertical steel frames 101 Both are vertically fixed with a transverse connection frame 104, the bottom of the transverse connection frame 104 is provided with universal wheels 105, and a driving device 2 is also fixed between the horizontal connection frames 104 on both sides, and the driving device 2 is perpendicular to the vertical steel frame 101 along the horizontal direction. set, and the two ends of the driving device 2 are respectively fixed on the transverse connecting frames 104 on both sides, the vertical steel frame 101 and the arc top arch frame 102 are formed by the butt joint of two half-segment steel frames, one half The end of the section steel frame is provided with a telescopic guide rod 4, and the end of the other half of the steel frame opposite to it is provided with a guide hole 5, and the telescopic guide rod 4 extends into the guide hole 5 to realize two and a half The butt joint of the section steel frame to form the vertical steel frame 101 or arc top arch 102, and the two ends (telescopic end and fixed end) of the driving device 2 are respectively fixed on the two half-section steel frames. The side wall of the steel frame 1 in contact with the roadway wall is provided with a plurality of through holes 103 which can be drilled by a drilling rig. The driving device 2 is a hydraulic pump or telescopic cylinder, or an electric push rod. The bottom of the vertical steel frame 101 is provided with wheels 3, and it is preferable to lay tracks in the roadway to facilitate the movement of the wheels 3, and the tracks can simultaneously play the role of solidifying the moving path of the arch. During installation, the arch frame and the roadheader can be connected by a chain. When the arch frame needs to be moved, the excavation machine can be used to drive the steel frame to move as a whole to move the arch frame to the position of the new roadway.

When multiple arches are required, two adjacent arches can be connected in a detachable manner.

The steps for using arches for support are as follows:

Step 1: Transport the components of the arch frame to the tunneling head through the underground transportation equipment. After laying the track, assemble the steel frame and place it on the track.

Step 2: Connect the arch frame with the boring machine through the chain, and after the boring machine advances forward, pull the arch frame under the newly excavated roadway.

Step 3: Fix the position of the wheel 3. If the driving device 2 uses a hydraulic pump, first add liquid to the hydraulic pump on the vertical steel frame 101 to increase the support pressure of the hydraulic pump, so that the vertical steel frame 101 is placed on the hydraulic pump. Under the driving of the arc top arch 102 and the hydraulic pump between the two vertical steel frames 101, add liquid to increase its pressure, so that the arc top arch 102 is in the position of the hydraulic pump. Driven to elongate, the distance between the two vertical steel frames 101 increases under the action of the hydraulic pump; until the outer side walls of the vertical steel frame 101 and the arc top arch frame 102 are all close to the roadway wall.

Step 4: Drill holes around the roadway through the through holes 103 and gaps on the steel frame, and then drive in anchor rods for reinforcement.

Step 5: Move the arch frame to the new position of the next excavation, and add secondary reinforcement such as anchor mesh or shotcrete to the roadway wall driven into the anchor rod.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.

Claims (3)

1. a kind of up and down balance telescopic movable support arch frame, it is characterized in that: comprise the steel frame (1) of telescopic structure, described steel frame (1) comprises the vertical steel frame (101 of two vertically arranged ) and the arc top arch (102) fixedly connected to the upper ends of the two vertical steel frames (101); A drive device (2) that expands and contracts in the vertical direction; the arc top arch (102) is provided with a drive device (2) that drives the arc top arch (102) to expand and contract; the side of the steel frame (1) in contact with the roadway wall A plurality of through holes (103) are opened on the wall, horizontal connecting frames (104) are vertically fixed on the inner sides of the two vertical steel frames (101), and universal wheels (105) are arranged on the bottom of the horizontal connecting frames (104). , the driving device (2) is also fixed between the horizontal connecting frames (104) on both sides, the driving device (2) is arranged horizontally perpendicular to the vertical steel frame (101), and the two ends of the driving device (2) are respectively Be fixed on the lateral connecting frame (104) on both sides. 2. A vertically balanced telescopic movable support arch according to claim 1, characterized in that: the driving device (2) is a hydraulic pump, a telescopic cylinder or an electric push rod. 3. A vertically balanced telescopic movable support arch according to claim 1, characterized in that: the bottom of the vertical steel frame (101) is provided with wheels (3).