CN213540406U

CN213540406U - Port protection structure of crude ore horizontal tunnel

Info

Publication number: CN213540406U
Application number: CN202022261171.3U
Authority: CN
Inventors: 刘飞; 肖团; 常连鹏; 刘浩; 倪耳国; 李玉勇; 蒋耀
Original assignee: Tianjin Mining Engineering Co ltd
Current assignee: Tianjin Mining Engineering Co ltd
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-06-25
Anticipated expiration: 2030-10-12

Abstract

The utility model relates to a tunnel protection structure of crude ore horizontal tunnel, it includes leading stock, anchor head and reinforcing bar net, anchor head and leading stock one end fixed connection, leading stock and anchor head are provided with a plurality ofly, an anchor head and a leading stock are a set of, anchor head drives leading stock along the edge of tunnel excavation position and inserts in the country rock, the reinforcing bar net is hung and is established in tunnel excavation position edge to with leading stock fixed connection, be provided with the non return subassembly that is used for resisting leading stock and breaks away from the country rock on the leading stock. This application has the effect of strengthening stability behind leading stock inserts the country rock inside.

Description

Port protection structure of crude ore horizontal tunnel

Technical Field

The application relates to the field of supporting of a raw ore side drift, in particular to a portal protection structure of a raw ore side drift.

Background

At present, raw ores are mined from mines and are not processed by mineral separation or other technologies, a few raw ores can be directly applied, most raw ores can be utilized after being processed by mineral separation or other technologies, and a tunnel needs to be excavated in the field in the process of mining the raw ores.

According to the related technology, a horizontal tunnel is required to be opened when a horizontal tunnel is excavated, short excavation and short building are adopted for the tunnel before excavation according to the stability of surrounding rocks, a protective structure with a steel mesh hung by forward anchor rods is adopted before excavation, then the tunnel is excavated to a stable bedrock along the tunnel site, and concrete lining is carried out until the excavation height of the horizontal tunnel is 3m, so that the surrounding rocks of the tunnel are approached, and the side slope of the tunnel is anchored and enclosed.

In order to solve the above problems, the inventor considers that the anchor rod is driven into the surrounding rock, the reinforcing mesh is drawn when the surrounding rock collapses, the reinforcing mesh is hung on the anchor rod, and then the anchor rod is drawn, so that the stability of the anchor rod is reduced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that the mesh reinforcement bears the tensile force of the collapsed surrounding rock and then pulls the anchor rod, so that the stability of the anchor rod is reduced, the application provides a portal protection structure of a crude ore horizontal portal.

The application provides a portal protection structure of a crude ore horizontal portal adopts the following technical scheme:

a tunnel protection structure of a crude ore horizontal tunnel comprises an advance anchor rod, anchoring heads and a reinforcing mesh, wherein the anchoring heads are fixedly connected with one end of the advance anchor rod, the advance anchor rod and the anchoring heads are provided with a plurality of groups, one anchoring head and one advance anchor rod form a group, the anchoring heads drive the advance anchor rod to be inserted and embedded into surrounding rocks along the edge of a tunnel excavation position, the reinforcing mesh is hung at the edge of the tunnel excavation position and is fixedly connected with the advance anchor rod, and a non-return assembly used for resisting the advance anchor rod to be separated from the surrounding rocks is arranged on the advance anchor rod.

By adopting the technical scheme, one end of the anchoring head is aligned to the surrounding rock, according to the portal position, the anchoring head with the advanced anchor rod is driven into the surrounding rock at the periphery of the portal position, the anchoring heads and the advanced anchor rods are driven into the periphery of the top of the portal, the reinforcing mesh is hung, the inserting anchor rods are more easily driven into the surrounding rock by the anchoring heads, the reinforcing mesh protects a slope, part of dropped surrounding rock is blocked, the advanced anchor rods play a role in protecting the portal position and play a role in protecting the excavation of the portal, the non-return components strengthen the connectivity of the advanced anchor rods and the surrounding rock, and when the surrounding rock which is dropped by the reinforcing mesh is pulled by the advanced anchor rods, the bearing capacity of the anchor rods is strengthened, and the effect of improving the stability of the advanced anchor rods is achieved.

Optionally, the non-return assembly comprises a non-return rod, a top rod and an inserting rod, the inside of the advanced anchor rod is hollow, the anchor head is provided with a pouring hole, the pouring hole is communicated with the inside of the advanced anchor rod, the advanced anchor rod is provided with a plurality of holding tanks, the holding tanks are arranged along the length direction of the advanced anchor rod, the inside and the outside of the advanced anchor rod are opened by the holding tanks, the non-return rod is positioned in the holding tanks, one end of the non-return rod close to the anchor head is rotatably connected with two opposite cell walls of one end of the holding tanks close to the anchor head, the side wall of the non-return rod facing the inside of the advanced anchor rod is coplanar with the inner wall of the advanced anchor rod, the side wall of the non-return rod facing the outside is coplanar with the outer wall of the advanced anchor rod, one end of the top rod is fixedly connected with the side wall of the non-return rod, the number of the check assemblies is the same as that of the accommodating grooves.

Through adopting above-mentioned technical scheme, it inlays inside the pole is inserted and inlays the pole and inlay hollow advance stock, when inserting, insert the sharp taper point of inlaying the pole and with the ejector pin to keeping away from the inside direction jack-up of advance stock, finally reach the effect with the slight jack-up of non return pole, a plurality of non return poles play the effect of barb in advance relatively this moment, the connectivity between stock and the country rock has been strengthened in advance, make advance stock be difficult for being pulled out in the country rock, reach the effect that promotes advance stock stability, and the hole is pour in the cooperation of hollow advance stock, can insert before the inlaying the pole, want inside a small amount of concrete of pouring of advance stock earlier, when the concrete has mobility, insert the pole and inlay inside the advance stock, the cooperation concrete further reaches the effect that promotes advance stock stability.

Optionally, the end face of the non-return rod far away from one end of the anchoring head is obliquely arranged, and the oblique direction inclines towards the direction far away from the anchoring head along the direction far away from the inside of the advanced anchor rod.

Through adopting above-mentioned technical scheme, the design of anchor head one end slope form is kept away from to the non return pole, makes advance stock when moving to keeping away from the inside direction of country rock, plays and stops the effect, changes and forms to insert with the country rock and inlays, produces the hindrance effect to the removal of advance stock then, reaches the effect of strengthening advance stock and being located country rock internal stability.

Optionally, the fixing position of the ejector rod and the check rod is located close to one end of the check rod far away from the anchoring head.

Through adopting above-mentioned technical scheme, the injectment of the relative non return pole fixed position of ejector pin makes the ejector pin change and keeps away from first one end jack-up of anchor with the non return pole, is convenient for insert the inlay pole and inserts inside leading stock to the displacement that the non return pole kept away from the first one end small distance of anchor trades to get laborsavingly, saves man-hour, accords with the construction current situation.

Optionally, the end face of one end that the ejector pin encorbelments sets up in the slope, and the incline direction inclines to keeping away from the first direction of anchor along keeping away from leading stock axis direction.

Through adopting above-mentioned technical scheme, the tip slope form's of ejector pin and inserted and inlay the pole butt setting, it inlays the pole with ejector pin jack-up to change to insert, and it is laborsaving to save trouble, saves man-hour.

Optionally, be provided with locking Assembly in the inserted bar, locking Assembly is located inside inserted bar point taper, logical groove has been seted up on the inserted bar, it opens along perpendicular inserted bar length direction and inserts inserted bar point taper department thoroughly to lead to the groove, locking Assembly is located logical inslot, locking Assembly includes first inserted block, second inserted block and spring, first inserted block and second inserted block outer wall and lead to groove cell wall butt, the spring is located between first inserted block and the second inserted block, spring one end and first inserted block fixed connection, the spring other end and second inserted block fixed connection, when first inserted block and second inserted block are accomodate in leading inslot simultaneously, the spring is in compression state, inserted bar point taper runs through the anchor head and pours the hole, locking Assembly and anchor head keep away from leading stock one end and form spacing each other.

Through adopting above-mentioned technical scheme, after inserting and inlaying the pole and run through the hole of pouring completely, spring self kick-backs and makes first inserted block and second inserted block remove to the direction of keeping away from each other simultaneously, in inserting the ejecting space of embedded pole point taper tip, the tip that advanced stock was kept away from to first inserted block and second inserted block and anchor head forms spacingly, make to insert and inlay the pole and be located inside the advanced stock forever, the stability that the non return pole set up has been guaranteed, reach the effect that promotes advanced stock and country rock stability through stable non return pole.

Optionally, the end faces of the first insertion block and the second insertion block, which face away from each other, are inclined, and the inclination angle is set according to the taper angle of the insertion rod.

Through adopting above-mentioned technical scheme, the design that first inserted block and second inserted block tip slope form makes the inserted and embedded pole when running through the anchor head, does not take place to obstruct with leading stock inner wall and the first inner wall of anchor, and the smooth and easy degree when the increase inserted and embedded pole is inserted and is embedded.

Optionally, it is a plurality of the holding tank divide into two sets ofly, and adjacent holding tank is seted up along advance stock length direction equidistance in the same group, and the holding tank of adjacent group uses advance stock axis as the symmetry axis, and the symmetry sets up on advance stock circumference outer wall.

Through adopting above-mentioned technical scheme, the position that the holding tank was seted up is the distribution of non return pole symmetry on the leading stock outer wall, and the increase leading stock passes through the non return pole and inserts the equilibrium of inlaying the connection with the country rock, is convenient for insert after inlaying the pole angle of adjustment simultaneously and inlays inside leading stock, and the relative holding tank dislocation of first inserted block and second inserted block is put promptly, avoids first inserted block and second inserted block and holding tank to produce the hindrance.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the non-return assembly strengthens the connectivity of the advanced anchor rod and the surrounding rock, so that when the reinforcing mesh bears the falling surrounding rock and plays a pulling role on the advanced anchor rod, the bearing capacity of the anchor rod is strengthened, and the effect of improving the stability of the advanced anchor rod is achieved;

2. the design that one end of the non-return rod, which is far away from the anchoring head, is inclined enables the non-return rod to form an agnail of the advanced anchor rod, so that when the advanced anchor rod moves towards the direction far away from the inside of the surrounding rock, the non-return rod is easier to form insertion embedding with the surrounding rock, and then the movement of the advanced anchor rod is hindered, and the effect of strengthening the stability of the advanced anchor rod in the surrounding rock is achieved;

3. the setting up of locking Assembly makes to insert and inlays that the pole is inside being located the advanced stock permanently, has guaranteed the stability that the non return pole set up, reaches the effect that promotes advanced stock and country rock stability through stable non return pole.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a partial structural schematic diagram of an advance anchor rod in the embodiment of the application.

FIG. 3 is a schematic view showing the use state of the insert rod.

FIG. 4 is a schematic view of the locking assembly in use.

Description of reference numerals: 1. leading an anchor rod; 11. accommodating grooves; 2. an anchoring head; 21. pouring holes; 3. a reinforcing mesh; 4. a check assembly; 41. a check rod; 42. a top rod; 43. inserting the embedded rod; 431. a through groove; 5. positioning a rod; 6. a locking assembly; 61. a first insert block; 62. a spring; 63. and a second insert block.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a portal protection structure of a crude ore horizontal portal.

Referring to fig. 1, a portal protection structure of a crude ore horizontal portal comprises a plurality of leading anchor rods 1 and a mesh reinforcement 3, the leading anchor rods 1 are arranged in a plurality, the leading anchor rods 1 are driven into surrounding rocks around the portal according to the size of the portal, the surrounding rocks around the portal are reinforced, the mesh reinforcement 3 is hung on the leading anchor rods 1, the mesh reinforcement 3 is bound and fixed with the ends of the leading anchor rods 1 through thin steel bars, the mesh reinforcement 3 is arranged close to the outer walls of the surrounding rocks and protects the portal position, the leading anchor rods 1 support the portal after the portal is excavated, the stability of the surrounding rocks is reinforced, the mesh reinforcement 3 is matched with the anchor rods 1 and has a stabilizing effect on the outer walls of the rocks, most of the fallen surrounding rocks are held by the mesh reinforcement 3, and the downward force of the mesh reinforcement 3 is borne by the leading anchor rods 1.

Referring to fig. 2 and 3, the leading anchor rod 1 is hollow, the end of the leading anchor rod 1 is fixed with an anchoring head 2, the anchoring head 2 is in threaded connection with the leading anchor rod 1, a pouring hole 21 is arranged in the anchoring head 2, the pouring hole 21 enables the hollow interior of the leading anchor rod 1 to be communicated with the outside, the leading anchor rod 1 is provided with a plurality of accommodating grooves 11, the accommodating grooves 11 are arranged along the length direction of the leading anchor rod 1, the accommodating grooves 11 are arranged in two groups, the connecting lines in the length direction of the accommodating grooves 11 in the same group are collinear, the accommodating grooves 11 in the adjacent group use the central axis in the length direction of the, the symmetry sets up on 1 outer wall of leading stock, is provided with non return subassembly 4 on the leading stock 1, and non return subassembly 4 includes non return pole 41, ejector pin 42 and inserts and inlay pole 43, inserts and inlays pole 43 and be provided with one, and non return pole 41 and ejector pin 42 all are provided with a plurality ofly, and set up quantity and holding tank 11 quantity the same.

The inserting and embedding rod 43 is inserted and embedded in the advanced anchor rod 1, the end part of the inserting and embedding rod 43 is in a taper shape, and the outer wall of the inserting and embedding rod 43 is abutted against the inner wall of the advanced anchor rod 1; a positioning rod 5 is arranged at one end, close to the anchoring head 2, in each accommodating groove 11, the positioning rod 5 is fixedly connected with the two opposite groove walls of the accommodating groove 11, a non-return rod 41 is positioned in the accommodating groove 11, one end of the non-return rod 41 is penetrated through by the positioning rod 5, the non-return rod 41 rotates in the accommodating groove 11 in a fan-shaped track by taking the positioning rod 5 as a rotating shaft, one end face, away from the positioning rod 5, of the non-return rod 41 is obliquely arranged, and the oblique direction inclines towards the position, away from the leading anchor rod 1; the ejector rod 42 is rectangular block, the ejector rod 42 is positioned in the advanced anchor rod 1, one end of the ejector rod 42 is fixedly connected with the non-return rod 41, the joint of the ejector rod 42 and the non-return rod 41 is positioned at the end close to the non-return rod 41 far away from the positioning rod 5, the other end of the ejector rod 42 is arranged towards the central axis of the length direction of the advanced anchor rod 1 in an overhanging way, the end face of the overhanging end of the ejector rod 42 is arranged in an inclined way, the inclined direction inclines towards the direction close to the non, so as to conform to the taper end part of the inserting and embedding rod 43, then the inserting and embedding rod 43 is easier to jack up the ejector rod 42, and then the end of the non-return rod 41 far away from the positioning rod 5 is jacked up to the position far away from the advanced anchor rod 1, so that the non-return rod 41 and the surrounding rock outside the advanced anchor rod 1 form clamping and embedding limit, that is, the non-return rods 41 of a plurality of perks are equivalent to the barbs on the outer wall of the advanced anchor rod 1, so that the effect of blocking the advance anchor rod 1 from being separated from the surrounding rock is achieved, and the stability of the advanced anchor rod 1 after being inserted into the surrounding rock is enhanced.

Referring to fig. 3 and 4, the inserting rod 43 is provided with a locking assembly 6, a through groove 431 is formed at the tapered end of the inserting rod 43, the opening direction of the through groove 431 is perpendicular to the length direction of the inserting rod 43, the through groove 431 is formed through the tapered end of the inserting rod 43, and the locking assembly 6 is located in the through groove 431; the locking assembly 6 comprises a first insertion block 61, a second insertion block 63 and a spring 62, wherein the first insertion block 61 and the second insertion block 63 are both positioned in the through groove 431, the spring 62 is positioned between the first insertion block 61 and the second insertion block 63, one end of the spring 62 is fixedly connected with the end part of the first insertion block 61 close to the second insertion block 63, the other end of the spring 62 is fixedly connected with the end part of the second insertion block 63 close to the first insertion block 61, the outer walls of the first insertion block 61 and the second insertion block 63 are abutted against the inner wall of the through groove 431, the sections of the first insertion block 61 and the second insertion block 63 which depart from each other are obliquely arranged, the oblique angle is in accordance with the oblique angle of the tip cone of the insertion embedded rod 43, the obstruction of the first insertion block 61 and the second insertion block 63 to the insertion embedded rod 43 into the advance anchor rod 1 is reduced, when the insertion embedded rod 43 is positioned in the advance anchor rod 1, the first insertion block 61 and the second insertion block 63 are dislocated with the accommodating groove 11, so as to avoid the obstruction of the first insertion, insert and inlay pole 43 when leading stock 1 is inside to slide, spring 62 is in the compression state, after inserting and inlaying the first 2 backs of anchor of pole 43 taper tip, locking Assembly 6 is located anchor head 2 outsidely, insert and inlay pole 43 and then go deep into one section distance in the country rock again, insert and inlay pole 43 is then pulled back to the pull-back, there is sufficient space this moment to make first inserted block 61 and second inserted block 63 deviate from one end each other and pop out logical groove 431 and form spacingly with anchor head 2 tip, it can't be taken back to make inserted and inlayed pole 43, it is permanent fixed with leading stock 1 formation, guarantee that non return pole 41 keeps away from locating lever 5 one end by stable jack-up, reach the effect of strengthening leading stock 1 and inserting the inside back stability of country rock.

The implementation principle of the portal protection structure of the crude ore horizontal portal in the embodiment of the application is as follows: aim at the country rock with 2 one ends of anchor head, squeeze into the country rock with anchor head 2 and leading stock 1 together, to the inside a small amount of concrete that adds of leading stock 1, when the concrete has mobility, insert embedded rod 43 and insert inside leading stock 1, make and insert embedded rod 43 outer wall and jack-up ejector pin 42, then keep away from 5 one end jack-ups of locating lever with non return rod 41, insert embedded rod 43 and finally run through anchor head 2, insert embedded rod 43 and then go deep into one section distance in the country rock again, insert embedded rod 43 is drawn back, there is sufficient space this moment to make first inserted block 61 and second inserted block 63 deviate from one end each other and pop out logical 431 and form spacingly with anchor head 2 tip, make inserted rod 43 can't draw back, form fixedly with leading stock 1 forever, guarantee that non return rod 41 keeps away from locating lever 5 one end by stable jack-up, reach the effect of strengthening the stability behind leading stock 1 inserts the country rock inside.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A portal protection structure of a raw ore side portal is characterized in that: the anchor head (2) is fixedly connected with one end of the advance anchor rod (1), the advance anchor rod (1) and the anchor head (2) are provided with a plurality of anchor heads, one anchor head (2) and one advance anchor rod (1) form a group, the anchor head (2) drives the advance anchor rod (1) to be inserted and embedded in surrounding rocks along the edge of a portal excavation position, the reinforcing mesh (3) is hung at the edge of the portal excavation position and is fixedly connected with the advance anchor rod (1), and a non-return assembly (4) used for resisting the advance anchor rod (1) to be separated from the surrounding rocks is arranged on the advance anchor rod (1).

2. A port protection structure for a crude ore tunnel according to claim 1, wherein: the non-return assembly (4) comprises a non-return rod (41), an ejector rod (42) and an inserting rod (43), the interior of the advanced anchor rod (1) is hollow, a pouring hole (21) is formed in the anchoring head (2), the pouring hole (21) is communicated with the interior of the advanced anchor rod (1), a plurality of accommodating grooves (11) are formed in the advanced anchor rod (1), the accommodating grooves (11) are formed in the length direction of the advanced anchor rod (1), the interior and the exterior of the advanced anchor rod (1) are opened by the accommodating grooves (11), the non-return rod (41) is positioned in the accommodating grooves (11), one end of the non-return rod (41) close to the anchoring head (2) is rotatably connected with two opposite groove walls of the accommodating grooves (11) close to one end of the anchoring head (2), the non-return rod (41) faces towards the side wall of the interior of the advanced anchor rod (1) and the inner wall of the advanced anchor rod (, ejector pin (42) one end and non return pole (41) are towards the lateral wall fixed connection of advance stock (1) inner wall, and the other end is towards the setting of encorbelmenting of advance stock (1) axis, inserts and inlays pole (43) one end and be the taper shape, inserts and inlays pole (43) taper shape one end and inserts and inlay inside advance stock (1), inserts and inlays pole (43) outer wall and advance stock (1) inner wall butt, and non return subassembly (4) set up quantity and set up quantity the same with holding tank (11).

3. A port protection structure for a crude ore tunnel according to claim 2, wherein: the end face of one end of the non-return rod (41) far away from the anchoring head (2) is obliquely arranged, and the oblique direction inclines towards the direction far away from the anchoring head (2) along the direction far away from the inside of the advanced anchor rod (1).

4. A port protection structure for a crude ore tunnel according to claim 2, wherein: the fixing position of the ejector rod (42) and the check rod (41) is positioned at one end, far away from the anchoring head (2), of the check rod (41).

5. A port protection structure for a crude ore tunnel according to claim 2, wherein: the end face of one end that encorbelments of ejector pin (42) sets up in the slope, and the incline direction is to keeping away from anchor head (2) direction slope along keeping away from leading stock (1) axis direction.

6. A port protection structure for a crude ore tunnel according to claim 2, wherein: the locking assembly (6) is arranged in the inserting and embedding rod (43), the locking assembly (6) is positioned in a pointed cone shape of the inserting and embedding rod (43), a through groove (431) is formed in the inserting and embedding rod (43), the through groove (431) penetrates through the pointed cone position of the inserting and embedding rod (43) along the length direction of the vertical inserting and embedding rod (43), the locking assembly (6) is positioned in the through groove (431), the locking assembly (6) comprises a first inserting block (61), a second inserting block (63) and a spring (62), the outer walls of the first inserting block (61) and the second inserting block (63) are abutted against the groove wall of the through groove (431), the spring (62) is positioned between the first inserting block (61) and the second inserting block (63), one end of the spring (62) is fixedly connected with the first inserting block (61), the other end of the spring (62) is fixedly connected with the second inserting block (63), and the first inserting block (61) and the second inserting block (63) are simultaneously accommodated in the through groove (431), the spring (62) is in a compressed state, the inserting and embedding rod (43) has a taper shape and penetrates through the anchoring head (2) to pour the hole (21), and the locking assembly (6) and one end, far away from the advanced anchor rod (1), of the anchoring head (2) form mutual limiting.

7. A port protection structure for a crude ore tunnel according to claim 6, wherein: the end faces of the first inserting block (61) and the second inserting block (63) which deviate from each other are inclined, and the inclined angles are set according to the taper angles of the inserting and embedding rod (43).

8. A port protection structure for a crude ore tunnel according to claim 7, wherein: a plurality of holding tank (11) divide into two sets ofly, and adjacent holding tank (11) is seted up along leading stock (1) length direction equidistance in the same group, and holding tank (11) of adjacent group use leading stock (1) axis as the symmetry axis, and the symmetry sets up on leading stock (1) circumference outer wall.