CN114810161A - A kind of support device to prevent the roadway from falling off the roof and blocking the roadway in the soft and broken belt - Google Patents

Abstract

The invention discloses a support device for preventing roof collapse and roadway blocking of a soft and broken roadway, which comprises two bearing stand columns and two damping stand columns; the top end between the two bearing upright columns is connected with a first pressure-bearing longitudinal beam; the top end between the corresponding bearing upright post and the damping upright post is connected with a contraction cross beam, and the connection end of the contraction cross beam and the damping upright post can slide downwards along the damping upright post; a second pressure-bearing longitudinal beam is connected between the ends of the two contraction cross beams far away from the first pressure-bearing longitudinal beam; a retractable auxiliary beam is connected between the first pressure-bearing longitudinal beam and the second pressure-bearing longitudinal beam; the retractable secondary beam is capable of achieving an elongation between the first and second pressure-bearing longitudinal beams. According to the combined support for the roadway, after a roof fall accident of the roadway occurs, the situation that personnel are injured by falling rock blocks and roof fall rocks block the roadway is prevented, the escape of constructors is facilitated after the roof fall of the roadway, a channel is provided for the expansion of subsequent rescue work, and the rapid installation and disassembly of the support device are met.

Description

A kind of support device to prevent the roadway from falling off the roof and blocking the roadway in the soft and broken belt

technical field

The invention relates to the technical field of roadway support, and is suitable for the roadway in the soft and broken zone of the coal mine. When the mining operation of a certain mining area or stage of the roadway is nearing the end, the surrounding rock of the roadway is deformed and broken, and the roadway has a certain danger of roofing. However, there are roadway engineering conditions with high cost and complicated procedures for re-support, which specifically involves the combination support of "four columns, two beams and one side" of the roadway with soft and broken belts and its construction method.

Background technique

The stability of the roadway support project is an important guarantee for the safe mining of underground resources. However, due to the complex and harsh conditions of the underground rock formation and the severe influence of the mining pressure, even if the roadway with good surrounding rock conditions at the initial stage of excavation, in a certain mining area When the mining operation of the or stage is coming to an end, the surrounding rock will be broken and loose. For the roadway supported by the bolt and shotcrete in the coal mine, when the mining operation in a certain mining area or stage is coming to an end, the surrounding rock of the roadway is deformed and broken, and there is a certain danger of roofing. The traditional technical methods and experience It is a technical solution for repairing damaged roadways and re-supporting, but there are problems such as high cost and complicated supporting procedures.

Aiming at the problem of roadway support in the soft and broken zone, and the lack of economical efficiency of the current technical solution of repairing the broken surrounding rock of the roadway and then re-supporting, this paper analyzes the failure and deformation mechanics mechanism of the roadway surrounding rock in the soft and broken zone and the surrounding rock of the roadway. On the basis of the principle of control mechanics, a simple structure, simple construction operation, low manufacturing cost, large bearing capacity, and can be disassembled and reused can be combined. The purpose is to economically and effectively prevent the risk of roof falling and blockage of the roadway in the soft and broken belt, and to meet the safety requirements of underground support projects.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a support device for preventing roof fall and blockage of roadway in the soft and broken zone, aiming to solve the above technical problem.

In order to achieve the above object, the present invention adopts the following technical solutions:

A support device for preventing the roof from falling off the roof of a roadway with a loose and broken zone, comprising two load-bearing columns and two damping columns; the top end between the two load-bearing columns is connected with a first pressure-bearing longitudinal beam; the corresponding load-bearing columns The top end between the upright column and the damping upright is connected with a retractable beam, and the connecting end of the retractable crossbeam and the damping upright can slide down along the damping upright; the two retractable crossbeams are far away from the first A second pressure-bearing longitudinal beam is connected between the ends of the pressure-bearing longitudinal beam; a retractable sub-beam is connected between the first pressure-bearing longitudinal beam and the second pressure-bearing longitudinal beam; the retractable sub-beam Elongation can be achieved between the first bearing stringer and the second bearing stringer.

The invention solves the problem that the roadway supported by the bolt and shotcrete net with good surrounding rock conditions in the initial stage of underground excavation in a coal mine will be affected by the mining pressure, and the surrounding rock will be broken and soft when the mining operation in a certain mining area or stage is nearing the end. It can meet the safety problems of the working conditions of the roadway with certain phenomenon and certain risk of roofing, and meet the rapid construction of such roadway support, as well as the safety requirements of production, transportation and ventilation. The invention proposes a combined support structure of "four columns, two beams and one surface" composed of a load-bearing column, a damping column, a shrinking beam and a shrinking sub-beam, so that after the roof of the roadway is roofed, the support will form a triangular safety at the cross-section of the roadway. Space, in the event of a roadway roof fall accident, it can prevent people from being injured by falling rocks and block the roadway by falling roof rocks, so as to facilitate the escape of construction personnel after the roadway roof falls, and to provide passages for subsequent rescue work, and at the same time to meet the needs of support devices. The quick installation and removal of the roadway combination bracket.

Preferably, in the above-mentioned support device for preventing the roof from falling off the roof of the roadway and blocking the roadway, the bottom end of the load-bearing column and the damping column are both provided with a bracket fixing base, and the outer sides of the load-bearing column and the damping column are sleeved. A bracket fixer is provided, and the bracket fixing base and the bracket fixer are both fixed on the bottom plate and the rock top of the surrounding rock through the bracket fixing anchor rod.

Preferably, in the above-mentioned support device for preventing the roof from falling off a roadway and blocking roadways, a fixed hydraulic jack is installed at the top of the load-bearing column and the damping column, and a jack emulsion is sequentially connected to the fixed hydraulic jack. The pipe and the liquid injection port of the jack are arranged along the inner side of the load-bearing column and the damping column.

Preferably, in the above-mentioned support device for preventing the roof of a roadway from falling off and blocking a roadway, an inverted trapezoidal damping groove is arranged inside the damping column, and the bottom of the inverted trapezoidal damping groove is connected to the bottom of the damping column, and the damping column is The top of the inverted trapezoidal damping groove is connected with a shrinking beam mounting groove; the shrinking beam mounting groove is arranged at the top of the damping column, and the shrinking beam mounting groove anti-protrusion cover plate is arranged on the outer side of the upper part of the shrinking beam mounting groove. The anti-protrusion cover plate of the beam installation groove can be opened and closed along the movable axis of the cover plate, and can be fixed on the damping column by the cover plate fixing screws; the end of the shrinkable beam can be connected in the shrinkable beam installation groove. , and slides down along the inverted trapezoidal damping groove under the action of the vertical pressure of the top plate.

Preferably, in the above-mentioned support device for preventing the roof of a roadway from falling off and blocking a roadway, the shrinking beam includes a fixed end of the shrinking beam and a moving end of the shrinking beam that are telescopically sleeved; the upper part of the fixed end of the shrinking beam is connected with a shrinking beam. The elastic buckle of the beam, the upper part of the movable end of the contraction beam is provided with an oblique groove type contraction beam slot, and the elastic buckle of the contraction beam and the slot of the contraction beam have unidirectional expansion and contraction, so that the contraction beam can be unidirectionally stretched The moving end of the retractable beam is fixed with a damping sliding end, and the damping sliding end is installed in the installation groove of the retracting beam. The damping sliding end slides to the lower part of the damping column along the inverted trapezoidal damping groove.

Preferably, in the above-mentioned support device for preventing roof falling and blocking of roadways with loose and broken belts, the retractable sub-beam includes a plurality of retractable support plate units connected in parallel between two retractable beams , the two sides of the plurality of retractable support plate units are connected with the retractable beams.

Preferably, in the above-mentioned support device for preventing the roof of the roadway from falling out of the loose and broken belt, the retractable support plate unit includes a movable end of the retractable support plate and a fixed end of the retractable support plate; The movable end of the support plate and the fixed end of the retractable support plate are each connected with a retractable support plate sub-beam, and a plurality of retractable support plate beam moving ends are connected between the retractable support plate sub-beams. and the fixed end of the retractable support plate beam, the wire mesh is welded on the movable end of the retractable support plate beam and the fixed end of the retractable support plate beam, and on the sub-beam of the retractable support plate; A sliding slot is formed between the movable end of the retractable support plate and the fixed end of the retractable support plate, so that the movable end of the retractable support plate and the fixed end of the retractable support plate can slide with each other.

Preferably, in the above-mentioned support device for preventing the roof falling and blocking of roadways with soft and broken belts, the connection between the shrinkable support plate units is also connected with the shrinkable beam, the first pressure-bearing longitudinal beam and the The connections between the second pressure-bearing longitudinal beams are all connected by a plurality of hinged buckles.

Preferably, in the above-mentioned support device for preventing roof falling and blocking of roadways with soft and broken belts, the connection between the load-bearing column and the damping column, the shrinking beam and the first pressure-bearing longitudinal beam, and The connection between the shrinking beam and the second pressure-bearing longitudinal beam is connected by a base and a pin shaft.

Preferably, in the above-mentioned support device for preventing the roof of a roadway with a loose and broken zone, the hardness of the surrounding rock on the side where the two load-bearing columns are arranged is greater than the surrounding rock on the side where the two damping columns are arranged firmness.

It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a support device for preventing the roof from falling off the roof and blocking the roadway in the roadway in the soft and broken zone. When the roof falls, the roof rock blocks are pressed on the shrinking beam, the first bearing longitudinal beam, the second bearing longitudinal beam and the shrinking sub-beam, and the damping sliding end slides down along the inverted trapezoidal damping groove of the damping column. The retractable beam and retractable sub-beam move down along the side of the damping column to the floor of the roadway, thus forming a triangular safe space in the roadway, preventing personnel from being injured by falling rocks and accident of roof falling and blocking roadway, and it is convenient for construction personnel after roof fall in roadway Escape, and provide channels for follow-up rescue work.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

Fig. 1 is the structural perspective schematic diagram of a kind of support device provided by the present invention to prevent the roadway from falling off the roof and blocking the roadway in the soft and broken zone;

Fig. 2 is a side view structural schematic diagram of a support device for preventing roof falling and blocking roadway in a roadway provided by the present invention;

Figure 3 is a schematic front view of the structure of a support device for preventing roof falling and blocking roadway in a roadway provided by the present invention;

Fig. 4 is a top-view structural schematic diagram of a support device for preventing roof falling and blocking roadway in a roadway provided by the present invention;

Figure 5 is a perspective view of the structure of a load-bearing column of a support device for preventing a roadway from falling off a roof and blocking a roadway provided by the present invention;

Figure 6 is a schematic front view of the load-bearing column structure of a support device for preventing roof fall and blockage of roadways with soft broken belts provided by the present invention;

Figure 7 is a schematic side view of the load-bearing column structure of a support device for preventing roof fall and blockage of roadways with soft broken belts provided by the present invention;

Figure 8 is a schematic top view of the load-bearing column structure of a support device for preventing roof fall and blockage of roadways with soft and broken belts provided by the present invention;

FIG. 9 is a perspective view showing the structure of a damping column of a support device for preventing roof falling and blocking of roadways in soft and broken belts provided by the present invention;

Figure 10 is a schematic front view of a damping column structure of a support device for preventing the roof of a roadway from falling off a roof and blocking a roadway provided by the present invention;

Figure 11 is a schematic side view of a damping column structure of a support device for preventing roof fall and blockage of roadways provided by the present invention;

Figure 12 is a schematic top view of the damping column structure of a support device for preventing the roof of a roadway from falling off a roof and blocking a roadway provided by the present invention;

Figure 13 is a perspective schematic view of a shrinking beam structure of a support device for preventing roof falling and blocking of roadways in soft and broken belts provided by the present invention;

Figure 14 is a schematic front view of a shrinking beam structure of a support device for preventing the roof of a roadway from falling off a roof and blocking a roadway provided by the present invention;

Figure 15 is a schematic side view of a shrinking beam structure of a support device for preventing roof fall and blockage of roadways with soft broken belts provided by the present invention;

Figure 16 is a schematic top view of a shrinking beam structure of a support device for preventing roof fall and blockage of roadways with soft broken belts provided by the present invention;

Fig. 17 is a perspective view of the structure of a pressure-bearing longitudinal beam of a support device provided by the present invention for preventing roof falling and blocking of roadways in soft and broken belts;

Figure 18 is a schematic front view of the structure of a longitudinal beam of a pressure-bearing longitudinal beam provided by the present invention;

Fig. 19 is a schematic side view of the structure of the bearing longitudinal beam of a support device provided by the present invention for preventing the roof of the roadway from falling off the roof and blocking the roadway;

Figure 20 is a schematic top view of the structure of a pressure-bearing longitudinal beam of a support device for preventing the roof of a roadway from falling off a roof and blocking a roadway provided by the present invention;

Figure 21 is a perspective schematic view of a retractable sub-beam structure of a support device for preventing roof falling and blocking of roadways in soft and broken belts provided by the present invention;

Figure 22 is a schematic front view of a retractable sub-beam structure of a support device for preventing roof falling and blocking of roadways in a soft and broken zone provided by the present invention;

Figure 23 is a schematic side view of a retractable sub-beam structure of a support device for preventing roof falling and blocking of roadways with soft and broken belts provided by the present invention;

Figure 24 is a schematic top view of a retractable sub-beam structure of a support device for preventing roof falling and blocking of roadways in a soft and broken zone provided by the present invention;

Fig. 25 is a perspective view showing the structure of a retractable support plate unit of a support device for preventing roof falling and blocking of roadways with loose and broken belts provided by the present invention;

Figure 26 is a schematic front view of the structure of a retractable support plate unit of a support device for preventing the roof of a roadway from falling off and blocking a roadway provided by the present invention;

27 is a schematic side view of the structure of a retractable support plate unit of a support device for preventing roof falling and blocking of roadways with loose and broken belts provided by the present invention;

Fig. 28 is a schematic top view of the structure of a retractable support plate unit of a support device for preventing roof falling and blocking of roadways with loose and broken belts provided by the present invention.

in:

1-load-bearing column; 2-damping column; 3-contraction beam; 4-first pressure-bearing longitudinal beam; 5-second pressure-bearing longitudinal beam; 6-retractable sub-beam; Emulsion pipe; 9-Jack injection port; 10-Bracket fixing hole; 11-Bracket fixing base; 12-Bracket holder; 13-Shrinkable beam connection base; 14-Shrinkable support plate unit; moving end of the guard plate; 16- moving end of the retractable support plate beam; 17- bolt fixing hole of the first pressure-bearing longitudinal beam fixing base; 18- inverted trapezoidal damping groove; 19- connecting base of the second pressure-bearing longitudinal beam; 20- 21-fixed hydraulic jack; 22-fixed base of the first pressure-bearing longitudinal beam; 23-connected base of the first pressure-bearing longitudinal beam; 24-fixed bolt; 25-shrinkable beam movable shaft; 26-Retractable beam movable base; 27-Retractable beam sliding support base; 28-Retractable support plate beam fixed end; 29-Retractable support plate fixed end; 30-Bolt fixing hole; 31-Second pressure bearing longitudinal Beam fixing base; 32-bearing longitudinal beam fixing bolts; 33-shrinking beam installation groove; 34-shrinking beam fixing end; 35-shrinking beam installation groove anti-protrusion cover; 36-cover movable shaft; 37-cover Plate fixing screw; 38-moving end of shrinking beam; 39-moving shaft hole of shrinking beam; 40- damping sliding end; 41- elastic buckle of shrinking beam; 42- groove of shrinking beam; 43-section of shrinking beam; Fixing hole; 45- mounting hole for connecting base of pressure-bearing longitudinal beam; 46- mounting hole for connecting base of retractable sub-beam; 47- retractable supporting plate sub-beam; 48- sliding slot.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The embodiment of the present invention discloses a support device for preventing roof falling and blocking of a roadway with a loose and broken zone, comprising: a load-bearing column 1 , a damping column 2 , a shrinking beam 3 , a first pressure-bearing longitudinal beam 4 , and a second pressure-bearing longitudinal beam 5 , retractable sub-beam 6 and bracket fixed anchor rod 7 .

As shown in Figures 5 to 8: the height of the load-bearing column 1 is the same as the height of the roadway, the structure is a hollow square steel pipe, the bottom of which is arranged with a bracket fixing base 11, and a bracket fixing hole 10 is set on the left and right sides of the bracket fixing base 11. The fixing anchor rod 7 is fixed on the bottom plate; in the middle, the bracket holder 12 slightly larger than the size of the load-bearing column is set on the outside of the load-bearing column 1, and the bracket fixing bolt 7 is used to fix the bracket holder 12 and the bracket fixing base 11 on the roadway entity One side of the rock wall; there is a first pressure-bearing longitudinal beam fixing base 22 on the left and right sides of the top of the load-bearing column 1, and the first pressure-bearing longitudinal beam 4 can be fixed on the first pressure-bearing longitudinal beam 4 by bolts through the pressure-bearing longitudinal beam bolt fixing holes 17 on the beam base 22. The other end of the first bearing longitudinal beam is connected to the first bearing longitudinal beam fixed base 22 on the top of another bearing column 1 through bolts; the front face of the top bearing column 1 is supported by a shrinkable beam movable base 26 and a shrinkable beam sliding support base 27 Structure, the shrinking beam 3 is fixed on the shrinking beam movable base 26 by bolts, and can move longitudinally and circumferentially along the shrinking beam movable axis 25, the shrinking beam sliding support base 27 is arranged under the shrinking beam movable base 26, and the shrinking beam 3 is compressed After the rotation, the bottom of the shrinking beam 3 is pressed on the inclined surface of the sliding support base 27 of the shrinking beam to form a stable support point; a fixed hydraulic jack 21 is installed on the top of the load-bearing column 1, and the emulsion pipe 8 of the jack and the injection port 9 of the jack are along the The inner side of the load-bearing column 1 is arranged.

As shown in Figures 9 to 12: the height of the damping column 2 is the same as the height of the roadway, the structure is a hollow square steel pipe, and the bottom is arranged with a bracket fixing base 11; On the outside of the upright column 2, the bracket holder 12 and the bracket holder base 11 are fixed on the side of the roadway with the weak rock wall strength or the side of the goaf by the fixing bolt 7. Inside the middle and upper section of the damping column 2, an inverted trapezoidal damping groove 18 made of thin steel plate is arranged, the bottom of the inverted trapezoidal damping groove 18 is connected to the bottom of the damping column 2, and the top of the inverted trapezoidal damping groove 18 is connected to the shrinking beam installation groove 33; 2. The installation groove 33 of the retractable beam is arranged inside the upper end. The upper part of the installation groove of the retractable beam 33 is a rectangular parallelepiped, and the lower part has a "concave" type structure. The plate 35 can be opened and closed along the movable shaft 36 of the cover, and can be fixed on the damping column 2 by the fixing screws 37 of the cover.

As shown in Figures 13 to 16: the shrinking beam 3 is composed of a fixed end 34 of the shrinking beam and a movable end 38 of the shrinking beam, and a movable shaft hole 39 of the shrinking beam is arranged on one side of the fixed end 34 of the shrinking beam. The retractable beam movable shaft 25 is connected, the retractable beam elastic buckle 41 is arranged on the upper part of the retractable beam fixed end 34, the upper part of the retractable beam movable end 38 is arranged with an oblique groove type contraction beam clip slot 42, the contraction beam elastic clip 41 and the contraction beam clip slot 42 It has one-way expansion and contraction, which can make the retractable beam 3 perform one-way expansion and contraction. There is a second pressure-bearing longitudinal beam fixing base 31 on the side of the end of the moving end 38 of the retractable beam, which is connected with the second pressure-bearing longitudinal beam 5 . A T-shaped damping sliding end 40 is arranged at the end of the moving end 38 of the retractable beam, which can be placed in the mounting groove 33 of the retractable beam on the upper part of the damping column 2. The bottom of the mounting groove 33 of the retractable beam is connected to the top of the inverted trapezoidal damping groove 18, and the retractable beam 3 After the upper part is stressed, the damping sliding end 40 slides to the lower part of the damping column 2 along the inverted trapezoidal damping groove 18 ;

As shown in Figures 17 to 20: a base fixing hole 44 is arranged at both ends of the first pressure-bearing longitudinal beam 4 and the second pressure-bearing longitudinal beam 5, which are respectively connected with the load-bearing column 1 and the damping column 2 through fixing bolts. A plurality of first pressure-bearing longitudinal beam connecting bases 23 and second pressure-bearing longitudinal beam connecting bases 19 are arranged between two ends of a pressure-bearing longitudinal beam 4 and a second pressure-bearing longitudinal beam 5, and the first pressure-bearing longitudinal beam is connected The base 23 and the second pressure-bearing longitudinal beam connection base 19 are arranged with pressure-bearing longitudinal beam connection base mounting holes 45, and the pressure-bearing longitudinal beam connecting base mounting holes 45 are connected to the retractable support plate sub-beam by fixing bolts. The base 20, shrink The cross-beam connection bases 13 are connected, so that the shrinkable cross-beam 3, the first pressure-bearing longitudinal beam 4, the second pressure-bearing longitudinal beam 5, and the shrinkable support plate unit 14 are connected to form a protective plane.

As shown in Figures 21 to 28: the retractable sub-beam 6 is composed of several retractable support plate units 14, and the retractable support plate unit 14 consists of the retractable support plate moving end 15 and the retractable support plate fixed end 29 A retractable support plate sub-beam 47 is arranged on both sides of the movable end 15 of the retractable support plate and the fixed end 29 of the retractable support plate, and several retractable support plate sub-beams 47 are arranged between the retractable support plate sub-beams 47 The movable end 16 of the support plate beam and the fixed end 28 of the retractable support plate beam, the wire mesh is welded to the movable end 16 of the retractable support plate beam, the fixed end 28 of the retractable support plate beam and the sub-beam 47 of the retractable support plate On the side of the retractable support plate sub-beams 47 on the left and right sides of the retractable support plate unit 14, several retractable support plate sub-beams are connected to the base 20, and the adjacent retractable support plate sub-beams are connected by bolts. The base 20, so as to connect several retractable support plate units 14 together to form a retractable sub-beam 6, and then connect the first pressure-bearing longitudinal beam to the base 23 and the second pressure-bearing longitudinal beam to the base 19 and the shrinkage through bolts. The cross beam is connected to the base 13, and the retractable sub-beam 6 is fixed on the retractable cross beam 3, the first pressure-bearing longitudinal beam 4, and the second pressure-bearing longitudinal beam 5 to form a support plane.

As shown in Figures 1 to 28: the length of the retractable beam 3 and the retractable support plate unit 14 in the retracted state is consistent with the width of the cross-section of the roadway, and the height of the load-bearing column 1 and the damping column 2 is slightly lower than that of the roadway. A load-bearing column 1 is arranged on the firmer side of the help, and a damping column 2 is arranged on the other side, and the load-bearing column 1 and the damping column 2 are respectively fixed on the roadway rock side and the bottom plate by the bracket fixing anchor rod 7 . At the top plate, a hydraulic jack 21 is arranged to fix the top plate. One end of the shrinking beam 3 is connected with the load-bearing column 1 by bolts, and the other end of the shrinking beam 3 is placed in the shrinking beam installation groove 33 of the damping column 2 . The first bearing longitudinal beam 4 and the second bearing longitudinal beam 5 are respectively connected with the bearing column 1 and the shrinking beam 3 through bolts. The retractable support and sub-beams 6 are respectively fixed on the retractable cross beam 3, the first pressure-bearing longitudinal beam 4, and the second pressure-bearing longitudinal beam 5 through bolts, forming a three-dimensional support space. The device is erected in the roadway of the soft crushing zone where there is a danger of roof falling. When the pressure is applied, the falling rock from the roof presses on the support retractable sub-beam 6, and the damping sliding end 40 slides down along the inverted trapezoidal damping groove 18 of the damping column 2, shrinks and shrinks. The beam 3 and the retractable sub-beam 6 are stretched and lengthened along the damping column 2, and finally stop sliding when they fall on the bracket fixing base 11 of the damping column 2, and finally form a triangular safe space at the cross section of the roadway.

As shown in Figures 1 to 28, the support device is arranged in the roadway where the roof is a soft and broken zone. When the roof falls, the roof rock blocks are pressed on the shrinking beam 3 and the shrinking sub-beam 6, and the damping sliding end 40 runs along the The inverted trapezoidal damping groove 18 of the damping column 2 slides down, and the retractable beam 3 and retractable sub-beam 6 at the top plate move down along the side of the damping column 2 to the floor of the roadway, thereby forming a triangular safe space in the roadway to prevent personnel from falling. The accident of rock damage and roof falling and blocking the roadway occurred, which facilitated the escape of construction personnel after the roof fell in the roadway, and provided a channel for the follow-up rescue work.

The construction method of a support device for preventing the roof of the roadway in the soft and broken zone disclosed by the present invention is as follows:

A Design the height of the load-bearing column 1 and the damping column 2 according to the dimension of the roadway section, the length of the first pressure-bearing longitudinal beam 4 and the second pressure-bearing longitudinal beam 5, the length of the retractable cross beam 3, the retractable sub-beam 6, and the retractable sub-beam The number of combinations of 6.

B On site, fix the load-bearing column 1 with the bracket fixing bolt 7 on the bottom plate and the rock top on the hard side of the surrounding rock, fix the top of the load-bearing column 1 with a fixed hydraulic jack 21, and fix the first pressure-bearing longitudinal beam 4 on the On the load-bearing column 1 , the damping column 2 is fixed on the bottom plate and the rock help on the weak side of the surrounding rock, and the top of the damping column 2 is fixed by a fixed hydraulic jack 21 .

C. Bolt the fixed end of the shrinking beam 3 on the movable base 26 of the shrinking beam of the load-bearing column 1, then put the damping sliding end 40 of the shrinking beam into the mounting groove 33 of the shrinking beam inside the damping column 2, and place the shrinking beam After the installation groove anti-protrusion cover 35 is closed, it is fixed with cover fixing screws 37 to prevent the retractable beam 3 from being forced to eject the damping column 2 . The second pressure-bearing longitudinal beam 5 is fixed to the second pressure-bearing longitudinal beam fixing base 31 of the shrinking beam 3 by means of bolts.

D. Fix the retractable support plate unit 14 on the first pressure-bearing longitudinal beam 4 with bolts in turn, and then fix it on the second pressure-bearing longitudinal beam 5 with bolts in turn, and then bolt the retractable support plates on the left and right sides of the bracket. The unit 14 is fixed on the shrinkable beam 3 , and finally the shrinkable support plate units 14 are sequentially connected into a whole with bolts to form a shrinkable sub-beam 6 .

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A supporting device for preventing roof collapse and roadway blocking of a soft and broken roadway is characterized by comprising two bearing upright columns (1) and two damping upright columns (2); a first pressure-bearing longitudinal beam (4) is connected to the top end between the two bearing upright columns (1); the top end between the corresponding bearing upright post (1) and the damping upright post (2) is connected with a contraction cross beam (3), and the connection end of the contraction cross beam (3) and the damping upright post (2) can slide downwards along the damping upright post (2); a second pressure-bearing longitudinal beam (5) is connected between the end heads of the two contraction cross beams (3) far away from the first pressure-bearing longitudinal beam (4); a retractable auxiliary beam (6) is connected between the first pressure-bearing longitudinal beam (4) and the second pressure-bearing longitudinal beam (5); the retractable secondary beam (6) is capable of extending between the first pressure-bearing longitudinal beam (4) and the second pressure-bearing longitudinal beam (5).

2. The support device for preventing roof fall and roadway blockage of soft crushing zone roadway according to claim 1, characterized in that the bottom ends of the bearing upright column (1) and the damping upright column (2) are respectively provided with a support fixing base (11), the outer sides of the bearing upright column (1) and the damping upright column (2) are respectively sleeved with a support fixer (12), and the support fixing base (11) and the support fixer (12) are respectively fixed on the bottom plate and the rock side of the surrounding rock through a support fixing anchor rod (7).

3. The support device for preventing roof fall and lane blocking of the soft crushing zone roadway according to claim 1, wherein a fixed hydraulic jack (21) is installed at the top end of each of the bearing upright column (1) and the damping upright column (2), and a jack emulsion pipe (8) and a jack liquid injection port (9) which are sequentially connected with the fixed hydraulic jack (21) are arranged along the inner sides of the bearing upright column (1) and the damping upright column (2).

4. The support device for preventing roof fall and roadway blocking of the soft crushing zone roadway according to any one of claims 1 to 3, wherein an inverted trapezoidal damping groove (18) is arranged inside the damping upright post (2), the bottom of the inverted trapezoidal damping groove (18) is connected with the bottom of the damping upright post (2), and a shrinkage beam mounting groove (33) is connected to the top of the inverted trapezoidal damping groove (18); the retractable beam mounting groove (33) is arranged at the top end of the damping upright post (2), the retractable beam mounting groove anti-protrusion cover plate (35) is arranged on the outer side of the upper part of the retractable beam mounting groove (33), the retractable beam mounting groove anti-protrusion cover plate (35) can be opened and closed along a cover plate movable shaft (36), and can be fixed on the damping upright post (2) by a cover plate fixing screw (37); the end of the contraction beam (3) can be connected in the contraction beam mounting groove (33), and slides downwards along the inverted trapezoidal damping groove (18) under the action of pressure in the vertical direction of the top plate.

5. The support device for preventing roof fall and lane blocking of a soft and broken roadway according to claim 4, wherein the contraction cross beam (3) comprises a contraction cross beam fixed end (34) and a contraction cross beam moving end (38) which are telescopically sleeved; the upper part of the fixed end (34) of the contraction beam is connected with an elastic buckle (41) of the contraction beam, the upper part of the movable end (38) of the contraction beam is provided with a chute-shaped contraction beam clamping groove (42), and the elastic buckle (41) of the contraction beam and the contraction beam clamping groove (42) have one-way flexibility, so that the contraction beam (3) can perform one-way telescopic motion; a damping sliding end (40) is fixed at the end of the movable end (38) of the contraction cross beam, the damping sliding end (40) is installed in the installation groove (33) of the contraction cross beam, and after the upper parts of the contraction cross beam (3) and the contraction type auxiliary beam (6) are stressed, the damping sliding end (40) slides to the lower part of the damping upright post (2) along the inverted trapezoidal damping groove (18); the side wall of the bearing upright post (1) is positioned below the fixed end (34) of the contraction beam and is fixed with a triangular inclined plane type contraction beam sliding support base (27).

6. The support device for preventing roof fall and roadway blocking of soft broken strip roadway according to claim 1, wherein the retractable auxiliary beam (6) comprises a plurality of retractable support plate units (14) connected between two retractable cross beams (3) in parallel, and two sides of the plurality of retractable support plate units (14) are connected with the retractable cross beams (3).

7. The support device for preventing roof collapse and roadway blocking of soft broken roadway according to claim 1, wherein the retractable support plate unit (14) comprises a retractable support plate moving end (15) and a retractable support plate fixing end (29); the two sides of the movable end (15) and the fixed end (29) of the retractable support guard plate are respectively connected with a retractable support guard plate secondary beam (47), a plurality of movable ends (16) and fixed ends (28) of the retractable support guard plate beam are connected between the retractable support guard plate secondary beams (47), and a wire mesh is welded on the movable ends (16) and the fixed ends (28) of the retractable support guard plate beam and the retractable support guard plate secondary beams (47); a sliding clamping groove (48) is formed between the movable end (15) of the retractable support guard plate and the fixed end (29) of the retractable support guard plate, so that the movable end (15) of the retractable support guard plate and the fixed end (29) of the retractable support guard plate can slide mutually.

8. The support device for preventing roof collapse and roadway blocking of soft and broken roadway zones according to claim 1, wherein the connection among the retractable support plate units (14) and the connection among the retractable cross beam (3), the first pressure-bearing longitudinal beam (4) and the second pressure-bearing longitudinal beam (5) are connected through a plurality of hinge buckles.

9. The support device for preventing roof fall and lane blocking of a soft and broken roadway according to claim 1, wherein the connection between the bearing upright column (1) and the damping upright column (2) and the contraction cross beam (3) and the first pressure-bearing longitudinal beam (4), and the connection between the contraction cross beam (3) and the second pressure-bearing longitudinal beam (5) are connected through a base and a pin shaft.

10. The support device for preventing roof fall and roadway blocking of soft crushing zone roadway according to claim 1, characterized in that the hardness of the surrounding rock on one side where two bearing columns (1) are arranged is greater than that of the surrounding rock on one side where two damping columns (2) are arranged.

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