CN207499891U - Reinforcing soft broken coal rock body bores the integrated extensible anchor pole of envelope note - Google Patents

Abstract

Reinforcing soft broken coal rock body bores the integrated extensible anchor pole of envelope note, including the coaxial anchor bit set gradually by front end to rear end, hollow end anchor pole, the first anchor rod connection piece, hollow connects anchor pole, the second anchor rod connection piece and jumbolter crossover sub；The rear end of anchor bit is connect with the front end of hollow end anchor pole, the front end of first anchor rod connection piece and rear end are connect respectively with the rear end of hollow end anchor pole and the hollow front end for connecing anchor pole, and the hollow rear end for connecing anchor pole is connected with the front end of jumbolter crossover sub respectively for front end and the rear end of the second anchor rod connection piece.The utility model can either realize the support reinforcement to coal mine roadway incompact fractured surrounding rock, it again can be with spreading to adapt to different loose crushing area ranges and can adapt to the large deformation of roadway surrounding rock, anchor pole uses after piercing rock mass as grouted anchor bar, deft design is reasonable, mounting process is simple, is primarily adapted for use in coal mine roadway loose crushing area or soft-rock tunnel reinforcing engineering.

Description

Drilling, sealing and injection integration of soft and broken coal and rock can be connected to long bolts

technical field

The utility model belongs to the field of support for soft and broken coal and rock masses in coal mine roadways, in particular to a long bolt that can be connected with the integration of drilling, sealing and injection for soft and broken coal and rock masses.

Background technique

Coal is the main form of energy in my country, and its proportion of primary energy consumption in my country has occupied more than 50% of the share for a long time. Coal mining needs to dig a series of roadways, and an important part of high production and high efficiency in coal mines is the effective support of these roadways. Among the many roadways, due to the influence of mining, geological structure and coal-forming environment, loose and broken surrounding rock roadways account for a large proportion, and the support is difficult and costly. Under the existing technical conditions, the support method with grouting bolt as the core is mostly used to change the state of the loose and broken surrounding rock of the roadway, making it a complete structure, so that it has a good bearing capacity. The traditional grouting bolt has complex structure, high cost, and its length is limited by the height and width of the roadway, so the length of the bolt is limited. The technical level of on-site workers is relatively high, so it cannot be widely used in the support of soft and broken coal and rock mass in coal mine roadways, which leads to the bottleneck problem of such roadway support, threatening the safety of staff and the realization of high production and high efficiency in mines.

Utility model content

In order to solve the deficiencies of the existing technology, the utility model provides a long anchor that can be connected to the integrated drilling, sealing and injecting of soft broken coal and rock mass with simple structure, convenient construction, low cost, reliable support, and can adapt to large deformation of surrounding rock. pole.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical scheme: the soft and broken coal and rock mass is drilled, sealed and injected, and the long anchor rod can be connected, including the anchor rod drill bit and the hollow end anchor rod arranged in sequence from the front end to the rear end in the same axial direction. Rod, the first anchor rod connecting piece, the hollow connectable anchor rod, the second anchor rod connecting piece and the rocker drilling rig conversion joint; The front end and the rear end of an anchor rod connector extend into and are screwed into the rear end interior of the hollow end anchor rod and the front end interior of the hollow connectable anchor rod respectively, and the front end of the second anchor rod connector extends into and is threaded Connected inside the rear end of the hollow anchor rod, the rear end of the second anchor rod connector extends into and is screwed into the front end of the rocker drilling machine conversion joint, and the rear part of the rocker drilling machine conversion joint is for transmission with the rocker drilling machine The connected hexagonal prism structure is provided with external threads on the outer circle of the rear end of the hollow anchor rod.

Two wrench slots are symmetrically arranged on the front and rear peripheral surfaces of the hollow end anchor rod and the hollow connectable anchor rod.

Two wrench clamping planes are symmetrically arranged on the circumferential surfaces of the first anchor rod connecting part and the second anchor rod connecting part.

A through hole communicating with the inside of the anchor rod with the hollow end is opened in the anchor drill bit, and a spiral slag discharge convex rib is fixedly arranged on the outer peripheral surface of the anchor rod with the hollow end.

Adopting the above-mentioned technical scheme, the construction method of drilling, sealing and injecting integrated drilling, sealing and injecting of soft and broken coal and rock, which can be connected to a long bolt, includes the following steps:

(a) Insert the hexagonal prism structure of the rocker drill adapter into the power output interface of the rocker drill;

(b) Connect the rocker drill adapter with the second bolt connector, screw the rocker bit to the front end of the hollow end bolt, and then use the first bolt connector to connect the hollow end bolt to the hollow connectable anchor Assemble the rod to the required length, then thread the rear end of the hollow connectable anchor rod to the front end of the second anchor rod connector and tighten it; when the required drilling length exceeds the width or height of the roadway, it needs to be used during the drilling process Continue to use the first anchor rod connecting piece to connect the hollow connectable anchor rod to meet the length requirement;

(c) Align the rock bolt bit with the set drilling point, start the rock bolt machine, and drill the long anchor rod assembled in step (b) into the soft and broken coal rock mass to the rear of the last hollow section where the anchor rod can be connected After being exposed to the designed length, then take down the drilling rig and remove the bolter rig conversion joint and the second bolt connector;

(d) After cleaning and leveling the rock surface around the anchor hole, install the sealing tray on the hollow connectable bolt, screw the nut on the external thread of the rear end of the hollow connectable bolt and press the sealing tray, and then Connect the grouting stop valve to the rear end of the hollow anchor rod, connect the front end of the grouting stop valve to the grouting pump connection pipe, then open the grouting stop valve, start the grouting pump, and the grout is sequentially pumped by the grouting stop The slurry valve, the hollow connectable anchor, the first anchor connector, the hollow end anchor and the anchor bit are injected into the annular gap between the outer wall of the long anchor and the drill hole, and the sealing tray prevents the slurry from being drilled. Hole overflow;

(e) There is a pressure gauge on the connecting pipe of the grouting pump. When the pressure on the pressure gauge reaches the set value, close the grouting stop valve, disassemble the connecting pipe and the grouting pump, and take it out after the grout solidifies. Lower the grouting stop grouting valve to complete the anchoring construction of the long anchor rod.

The outlet end of the rear end of the grouting stop valve is provided with a grouting pipe joint with an external thread, and the grouting pipe joint extends into and is screwed into the rear end of the hollow anchor rod.

The front end of the sealing tray is fixedly connected with a hollow rubber plug that extends into the drill hole. The inner diameter of the hollow rubber plug, the outer diameter of the hollow end anchor rod and the outer diameter of the hollow connectable anchor rod are equal. The outer circumference of the hollow rubber plug is in the shape of It has a conical structure with a thin front and a thick rear, and the outer diameter of the thinnest end of the front end of the hollow rubber plug is equal to the inner diameter of the drilled hole.

Compared with the prior art, the utility model has the following technical effects:

1. The grouting stop valve in the utility model is a recyclable component, which can save costs compared with the traditional grouting anchor.

2. The long anchor rod body of the present invention includes a hollow end anchor rod and a hollow connectable anchor rod (the standard length of which is 1.0m, which can be reasonably assembled by using the first anchor rod connector according to the width of the loose and broken area of the surrounding rock. It has a wider range of application than traditional grouting bolts, and due to the use of high-strength, high-elongation steel materials, coupled with the high elongation of the extension part, the rod body has good elongation after anchoring, so that it can adapt to large deformations of surrounding rock.

3. The sealing tray of the utility model is a hollow rubber plug of a certain length added on the basis of the traditional sealing tray. When the nut presses the sealing tray, the hollow rubber plug is pressed into the hole of the drilled hole. The outer circumference of the rubber plug has a conical structure that is thinner at the front and thicker at the back. The tighter the nut is pressed against the sealing tray, the stronger the sealing performance will be, which can fully improve the sealing effect and solve the problem of the traditional grouting bolt sealing process. .

4. Each component in the utility model adopts the method of threaded connection, which not only facilitates split-type manufacturing, but also facilitates assembly.

5. The long anchor rod in the utility model not only has the function of drill pipe drilling, but also has the function of sealing pipe, which kills two birds with one stone, avoids the collapse of the hole after pulling out the drill pipe after drilling, kills two birds with one stone, and saves anchoring construction time and save construction cost.

In summary, the utility model can not only realize the reinforcement and support of the loose and broken surrounding rock of the coal mine roadway, but also can be extended to adapt to different loose broken area ranges and can adapt to the large deformation of the roadway surrounding rock. It is used as a grouting bolt after the body, with exquisite and reasonable design and simple installation process, which solves the problems of complex construction technology and complex structure of traditional grouting bolt support, and is mainly suitable for loose and broken areas of coal mine roadways or soft rock roadway reinforcement projects.

Description of drawings

Fig. 1 is a structural representation of the utility model;

Fig. 2 is a three-dimensional structural schematic diagram of a grouting stop valve in the utility model;

Fig. 3 is a three-dimensional structural schematic diagram of the conversion joint of the rocker drilling rig in the utility model;

Fig. 4 is a three-dimensional structural schematic diagram of a hollow-ended anchor rod in the utility model;

Fig. 5 is a schematic diagram of the three-dimensional structure of the hollow connectable anchor rod in the utility model;

Fig. 6 is a schematic diagram of the three-dimensional structure of the sealing tray in the utility model;

Fig. 7 is a structural schematic diagram of the rock bolt drill bit in the utility model.

Detailed ways

As shown in Figures 1 to 7, the soft and broken coal and rock mass drilling, sealing and injection integration of the utility model can be connected to a long anchor rod, and the soft and broken coal and rock mass drilling and sealing integration can be connected to a long anchor rod, including coaxial Anchor drill 1, hollow end anchor 3, first anchor connector 4, hollow connectable anchor 5, second anchor connector 8 and anchor drill conversion joint 9 arranged in sequence from the front end to the rear end; The rear end of the rod drill bit 1 extends into and is threaded inside the front end of the hollow end anchor rod 3, and the front end and the rear end of the first anchor rod connector 4 respectively extend into and be threaded on the inside of the hollow end anchor rod 3. The interior of the rear end and the interior of the front end of the hollow connectable anchor rod 5, the front end of the second anchor rod connector 8 extends into and is screwed into the rear end interior of the hollow connectable anchor rod 5, the rear end of the second anchor rod connector 8 It is inserted into and screwed into the front end of the rocker drill conversion joint 9. The rear part of the rocker drill conversion joint 9 is a hexagonal prism structure 14 connected with the drive of the rocker drill machine, and the outer circle of the rear end of the rocker rod 5 is hollow Provided with external threads.

Two wrench slots 6 are symmetrically arranged on the front and rear circumferential surfaces of the hollow end anchor rod 3 and the hollow connectable anchor rod 5 .

Two wrench engagement planes 15 are symmetrically arranged on the circumferential surfaces of the first anchor connecting part 4 and the second anchor connecting part 8 . Both the wrench clamping groove 6 and the wrench clamping plane 15 are used for the worker to perform axial screw connection after clamping with a wrench.

The anchor drill bit 1 is provided with a through hole communicating with the interior of the hollow end anchor 3 , and the outer peripheral surface of the hollow end anchor 3 is fixedly provided with a spiral slag removal rib 2 .

The construction method of the utility model for the integration of drilling, sealing and injection of the soft and broken coal and rock body, which can be connected to a long anchor rod, comprises the following steps,

(a) Insert the hexagonal prism structure 14 of the rocker drill conversion joint 9 into the power output interface of the rocker drill;

(b) Connect the rocker drill conversion joint 9 with the second rocker connector 8, screw the rocker bit 1 to the front end of the hollow end anchor rod 3, and then use the first anchor rod connector 4 to connect the hollow end anchor rod 3. Assemble with the hollow connectable anchor rod 5 to the required length, then screw the rear end of the hollow connectable anchor rod 5 with the front end of the second anchor rod connector 8 and tighten; when the required drilling length exceeds the roadway width or When the height is high, it is necessary to continuously use the first anchor rod connector 4 to connect the hollow and connectable anchor rod 5 during the drilling process to meet the length requirement;

(c) Align the rock bolt bit 1 with the set drilling point, start the rock bolt machine, and drill the long anchor rod assembled in step 2 into the soft and broken coal rock mass to the rear part of the last section, which is hollow and connectable to the anchor rod 5 After being exposed to the designed length, the drilling rig is then removed and the bolter rig conversion joint 9 and the second bolt connector 8 are removed;

(d) After cleaning and leveling the rock surface around the anchor hole, install the sealing tray 7 on the hollow connectable anchor rod 5, screw the nut 10 on the external thread of the rear end of the hollow connectable bolt 5 and press the seal tightly. Hole tray 7, then connect the grouting stop valve 11 with the rear end of the hollow anchor rod 5, connect the front end of the grouting stop valve 11 to the grouting pump connection pipe, then open the grouting stop valve 11, start the injection Grouting pump, the grout is poured into the outer wall of the long anchor and the drill hole by the grouting stop grout valve 11, the hollow connectable anchor 5, the first anchor connector 4, the hollow end anchor 3 and the anchor drill 1. In the annular gap between the holes, the sealing tray 7 prevents the slurry from overflowing inside and outside the drill hole;

(e) A pressure gauge is installed on the connecting pipe of the grouting pump. When the pressure on the pressure gauge reaches the set value, close the grouting stop valve 11, disassemble the connecting pipe and the grouting pump, and wait until the grout solidifies. Take off the grouting stop grouting valve 11, namely complete the anchoring construction of the long anchor rod.

The outlet end of the rear end of the grouting stop valve 11 is provided with a grouting pipe joint 12 with an external thread, and the grouting pipe joint 12 extends into and is threaded inside the rear end of the hollow anchor rod 5 .

The front end of the sealing tray 7 is fixedly connected with a hollow rubber plug 13 extending into the drilled hole. The inner diameter of the hollow rubber plug 13, the outer diameter of the hollow end anchor rod 3 and the outer diameter of the hollow connectable anchor rod 5 are equal. The outer circumference of the plug 13 is a conical structure that is thinner at the front and thicker at the back, and the outer diameter of the thinnest end of the front end of the hollow rubber plug 13 is equal to the inner diameter of the drilled hole.

This embodiment does not impose any formal restrictions on the shape, material, structure, etc. of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the utility model belong to the technology of the utility model. protection scope of the program.

Claims (4)

1. reinforcing soft broken coal rock body bores the integrated extensible anchor pole of envelope note, it is characterised in that：Including coaxial by front end to rear end The anchor bit set gradually（1）, hollow end anchor pole（3）, the first anchor rod connection piece（4）, hollow connect anchor pole（5）, second Anchor rod connection piece（8）With jumbolter crossover sub（9）；Anchor bit（1）Rear end stretch into and be threaded in hollow end Anchor pole（3）Front end inside, the first anchor rod connection piece（4）Front end and rear end be respectively protruding into and be threaded in hollow end Head anchor pole（3）Rear end inside and hollow connect anchor pole（5）Front end inside, the second anchor rod connection piece（8）Front end stretch into simultaneously It is threaded in and hollow connects anchor pole（5）Rear end inside, the second anchor rod connection piece（8）Rear end stretch into and be threaded in anchor Bar drill machine crossover sub（9）Front end inside, jumbolter crossover sub（9）Rear portion be six to be sequentially connected with jumbolter Prism structure（14）, it is hollow to connect anchor pole（5）Rear end outer circle be provided with external screw thread.

2. reinforcing soft broken coal rock body according to claim 1 bores the integrated extensible anchor pole of envelope note, it is characterised in that：It is hollow End anchor pole（3）Anchor pole is connect with hollow（5）Forepart and rear portion circumferential surface on center symmetric setting there are two spanner Card slot（6）.

3. reinforcing soft broken coal rock body according to claim 1 bores the integrated extensible anchor pole of envelope note, it is characterised in that：First Anchor rod connection piece（4）With the second anchor rod connection piece（8）Circumferential surface on center symmetric setting there are two spanner be clamped plane （15）.

4. reinforcing soft broken coal rock body according to claim 1 bores the integrated extensible anchor pole of envelope note, it is characterised in that：Anchor pole Drill bit（1）It inside offers and hollow end anchor pole（3）The through-hole of inside connection, hollow end anchor pole（3）External peripheral surface consolidate Surely it is provided with spiral deslagging fin item（2）.