AU2017417167A1 - A Miniature Full-Face Borehole Arrangement Device for Model Test and Its Application - Google Patents

Abstract

The present disclosure relates to a micro full-face borehole arrangement device for a model test and a method of using the same; the micro full-face borehole arrangement device comprises: a rail mechanism, a drilling mechanism, and a controller, wherein the drilling mechanism is provided on the rail mechanism and movable along the rail mechanism, the drilling mechanism comprising an annular rail section, a radial rail section, a drilling head portion, and a support portion, two ends of the radial rail section being disposed on the annular rail portion and peripherally rotatable along the annular rail portion, the drilling head portion being disposed on the radial rail portion and rectilinearly movable along the radial rail section, and the support portion being disposed outside of the annular rail section for fixing the entire drilling mechanism; the controller being connected to the annular rail section, the radial rail section, the drilling portion, and the support portion, respectively. The borehole arrangement device according to the present disclosure has a scientific and reasonable structure and a high automation degree; it solves the difficulties in traditional methods of full-face boring a model test tunnel; it has a high boring precision and a high efficiency; besides, it enables the drilling mechanism to cover the full face of the model test and to bore at any position, thereby adapting itself to test models with various rail specifications.

Description

Micro Full-Face Borehole Arrangement Device for a Model Test, And Method of Using the Same

Field [0001] The present disclosure relates to the technical field of tunnel excavation test facilities, and more specifically to a micro full-face borehole arrangement device for a model test and a method of using the same.

Background [0002] With its distinct advantages in the aspects of economy, efficiency, and strong adaptability to geology, the drilling and blasting method for tunnel construction is still the most important and common technical means for tunneling work in China. Among tens of thousands of completed shaft alleys and tunnel tubes, 90% above adopt the tunnel blasting method for boring operations. It can be said that the hundred years of development history of China’s tunnel construction are largely accompanied by tunnel blasting technologies. However, blasting excavation disturbance during a tunnel excavation process will induce various kinds of geological disasters, which brings great difficulties for tunnel construction. A large-scale physical model test is an important research method for revealing a mechanism of blasting excavation, which may implement collection and analysis of multivariate information during the tunnel excavation process, thereby providing a significant guidance to tunnel blasting operations. Studies show that diverting a reasonable arrangement of boreholes from an engineering scale to a physical model test scale is a bottleneck that restricts carrying out of the test. A model test tunnel generally has a relatively small span, such that with gradual advancement of a tunnel face, arrangement of bore holes in a deeper tunnel face becomes increasingly difficult. By far, a device for automatic arrangement of boreholes at a tunnel full face and a method of using the same have not been provided in the field of model test yet.

Summary [0003] To address the drawbacks in the prior art, the present disclosure provides a micro full-face borehole arrangement device for a model test.

[0004] The present disclosure further provides a method of using the micro full-face borehole arrangement device for a model test.

[0005] A technical solution of the present disclosure is provided below:

[0006] A micro full-face borehole arrangement device for a model test, comprising: a rail mechanism, a drilling mechanism, and a controller, wherein the drilling mechanism is provided on the rail mechanism and movable along the rail mechanism; the drilling mechanism comprises an annular rail section, a radial rail section, a drilling head portion, and a support portion, two ends of the radial rail section being disposed on the annular rail portion and peripherally rotatable along the annular rail portion, the drilling head portion being disposed on the radial rail portion and rectilinearly movable along the radial rail section, and the support portion being disposed outside of the annular rail section for fixing the entire drilling mechanism; and the controller is connected to the annular rail section, the radial rail section, the drilling portion, and the support portion, respectively.

[0007] Preferably, the rail mechanism comprises bar-shaped dual rails and a telescopic support, wherein the telescopic support is disposed between the bar-shaped dual rails and connects the bar-shaped dual rails, a bar-shaped rail groove being provided on the bar-shaped dual rails.

[0008] Preferably, the annular rail section comprises an annular guide rail, a driven flywheel, a first driving motor, and a crankset, a plurality of laps of concentric rail grooves are provided on the annular guide rail, the first driving motor is mounted at an outer periphery of the annular guide rail and connected to the crankset, the crankset is engaged with the driven flywheel, and the first driving motor is electrically connected to the controller.

[0009] Preferably, the radial rack section comprises a radial guide rail and a high-strength bolt, wherein two ends of the radial guide rail are connected to the high-strength bolt, the high-strength bolt being fixedly connected to the driven flywheel through the rail groove. Such an arrangement has an advantage that the power provided by the first driving motor drives, via the crankset, the driven flywheel to rotate, which may cause the radial guide rail to peripherally rotate along the rail groove; in subsequent procedures, the driven flywheel may be connected through different rail grooves, thereby guaranteeing a full-face coverage.

[0010] Preferably, the drilling head portion comprises a micro motor and a drilling head, the drilling head is combined with an output shaft of the micro motor, and the micro motor is electrically connected to the controller. Such an arrangement has an advantage that the combined connection manner facilitates later detaching of the drilling head to change a drilling head of a different diameter, thereby satisfying different operation requirements.

[0011] Preferably, a bottom of the micro motor is provided with two micro gearwheels, the two micro gearwheels being connected by transmission via the second driving motor; a radial tooth space is provided on the radial guide rail, the micro gearwheels are provided inside the radial tooth space and driven to travel by the second driving motor, the second driving motor being electrically connected to the controller. Such an arrangement has an advantage that a position of the drilling head portion on the radial guide rail may be adjusted by the second driving motor to coordinate with rotation of the flywheel, thereby enabling boring at any position in the full face.

[0012] Preferably, the support portion is optionally a servo cylinder, the servo cylinder being electrically connected to the controller.

[0013] Preferably, three support portions are provided at an outer side of the annular guide rail, the three support portions being evenly distributed at the outer periphery of the annular guide rail.

[0014] Preferably, a running support is provided at two sides of the annular guide rail, and a pulley is provided at a bottom end of the running support, the pulley being disposed in the bar-shaped rail groove.

[0015] Preferably, the controller is optionally a single-chip machine.

[0016] A method of using the micro full-face borehole arrangement device for a model test, comprising steps of:

[0017] (1) laying the rail mechanism in a model test zone, and mounting an appropriate high strength drilling head to the micro motor;

[0018] (2) placing the whole drilling mechanism on the rail mechanism, disposing the pulley in the bar-shaped rail groove, and then moving the whole drilling mechanism to an operating zone of the model test;

[0019] (3) after the drilling mechanism arrives at the operating zone, controlling, by the controller, the support portion to start, wherein the support portion extends out to elevate the drilling mechanism overhead of a tunnel space of the model test, and then removing the rail mechanism;

[0020] (4) adjusting, by the controller, rotation of the radial guide rail and rectilinear movement of the drilling head portion along the radial guide rail, to finally cause the drilling head to align with a position to be bored;

[0021] (5) starting, by the controller, the micro motor, which drives the drilling head to perform a boring operation; and [0022] (6) finishing boring operations on other positions in a same manner as described in step (4) and step (5).

[0023] The present disclosure has the following advantageous effects:

[0024] 1. The borehole arrangement device according to the present disclosure has a scientific and reasonable structure and a high automation degree; it may be automatically manipulated by a controller, thereby effectively solving the difficulties in traditional methods for full-face boring a model test tunnel; besides, it has a high boring precision and a high efficiency.

[0025] 2. The borehole arrangement device according to the present disclosure enables selection of different radial guide rails dependent on different test models, such that it enables the drilling mechanism to cover the full face of the model test and to bore at any position, thereby adapting itself to test models with various rail specifications.

[0026] 3. The borehole arrangement device according to the present disclosure uses a support portion to effectively fix the whole drilling mechanism so as to guarantee efficiency and stabilization when the drilling portion is operating.

Brief Description of the Drawings [0027] Fig. 1 shows a schematic diagram of a whole structure of a borehole arrangement device of the present disclosure;

[0028] Fig. 2 shows a structural schematic diagram of a drilling mechanism of the present disclosure;

[0029] Fig. 3 shows a structural schematic diagram of a radial guide rail of the present disclosure;

[0030] Fig. 4 shows a structural schematic diagram of a support and fixation device of the present disclosure;

[0031] Where: 1. Bar-shaped dual rails; 2. Telescopic support; 3. Annular guide rail; 4. Radial guide rail; 5. Micro motor; 6. High-strength drilling head; 7. Support portion; 8. Controller; 9. Pulley; 10. Data transmission line; 11. Bar-shaped rail groove; 12. Rail groove; 13. Radial tooth space; 14. High-strength bolt; 15. Telescopic arm; 16. Driven flywheel; 17.

Crankset; 18. First driving motor; 19. Second driving motor.

Detailed Description of Embodiments [0032] Hereinafter, the present disclosure will be described in further detail through embodiments with reference to the accompanying drawings, but is not limited thereto.

[0033] Embodiment 1 [0034] As shown in Figs. 1~4, this embodiment provides a micro ftril-face borehole arrangement device for a model test, mainly comprising: a rail mechanism, a drilling mechanism, and a controller, wherein the drilling mechanism is disposed on the rail mechanism and movable along the rail mechanism, thereby adjusting the whole drilling mechanism to travel to a ftril-face working position of a model test zone. The drilling mechanism is a main working component, comprising: an annular rail section, a radial rail section, a drilling head portion, and a support portion; two ends of the radial rail section are disposed on the annular rail portion and peripherally rotatable along the annular rail portion; the drilling head portion is disposed on the radial rail portion and rectilinearly movable along the radial rail section; the support portion is disposed outside of the annular rail section for fixing the entire drilling mechanism; and the controller is connected to the annular rail section, the radial rail section, the drilling portion, and the support portion, respectively.

[0035] The rail mechanism comprises bar-shaped dual rails 1 and a telescopic support 2, wherein the telescopic support 2 is disposed between the bar-shaped dual rails 1 and connects the bar-shaped dual rails 1, a bar-shaped rail groove 11 being provided on the bar-shaped dual rails 1. An interval between the two bar-shaped rails of the bar-shaped dual rails 1 may be adjusted by the telescopic support 2 to match different drilling mechanisms. Besides, the rail mechanism is a multi-unit combined type, wherein by connecting rail mechanism units of the same specification, the rail mechanism may be extended to meet long-distance movement of the drilling mechanism.

[0036] The annular rail section comprises an annular guide rail 3, a driven flywheel 16, a first driving motor 18, and a crankset 17; a through-cavity type rail groove 12 is provided on the annular guide rail 3, a first driving motor 18 is mounted at an outer periphery of the annular guide rail 3 and connected to the crankset 17, the crankset 17 is engaged with the driven flywheel 16, and the first driving motor 18 is electrically connected to a controller 8. In this embodiment, two first driving motors 18 are symmetrically mounted at two ends of an outer periphery of a horizontal diameter of the annular guide rail 3 and is driven to connect with the driven flywheel 16 via two cranksets 17.

[0037] The radial rack section comprises a radial guide rail 4 and a high-strength bolt 14, wherein two ends of the radial guide rail 4 are connected to the high-strength bolt 14, the high-strength bolt 14 being fixedly connected to the driven flywheel 16 through the rail groove 12. The first driving motor 18 provides power to drive the driven flywheel 16 to rotate through the crankset 17, and then rotation of the driven flywheel 16 may cause the radial guide rail 4 to peripherally rotate along the rail groove 12.

[0038] The drilling head portion comprises a micro motor 5 and a high-strength drilling head 6, the high-strength drilling head 6 is combined with an output shaft of the micro motor 5, and the micro motor 5 is electrically connected to the controller 8. The combined connection manner facilitates later detaching of the drilling head to change a drilling head of a different diameter, thereby satisfying different operation requirements.

[0039] A bottom of the micro motor 5 is connected to two micro gearwheels (not shown) via a base plate, the two micro gearwheels being connected by transmission via the second driving motor 19; a radial tooth space 13 is provided on the radial guide rail 4, the micro gearwheels are provided inside the radial tooth space 13 and driven to travel by the second driving motor 19, the second driving motor 19 being electrically connected to the controller 8. After the output shaft of the second driving motor is fixedly connected to the micro gearwheels, one end of the output shaft is connected to the base plate via a bearing; the second driving motor 19 drives the micro gearwheel to move rectilinearly along the radial tooth space 13. In other words, a position of the drilling head portion on the radial guide rail may be adjusted by the second driving motor 19 to coordinate with rotation of the driven flywheel 16, thereby implementing boring at any position in the full face.

[0040] The support portion 7 is optionally a servo cylinder, the servo cylinder being electrically connected to the controller 8. In this embodiment, three of the support portions 7 are provided at an outer side of the annular guide rail 3, the three support portions 7 being evenly distributed at the outer periphery of the annular guide rail.

[0041] Additionally, a running support is provided at two sides of the annular guide rail 3, and a pulley 9 is provided at a bottom end of the running support, the pulley 9 being disposed in the bar-shaped rail groove 11. The drilling mechanism is moved to a model test operating zone as the pulley 9 runs in the bar-shaped rail groove. In this embodiment, the controller 8 is optionally a single-chip machine; a driver may be prewritten in the single-chip machine; the first driving motor 18, the second driving motor 19, the micro motor 5, and the servo cylinder are all connected to the controller via a data transmission line 10, their respective operations being controlled by the controller.

[0042] Embodiment 2 [0043] A micro full-face borehole arrangement device for a model test has a structure shown in Embodiment 1, except that three laps of concentric annular rail grooves 12 are provided on the annular guide rail 3. Radial guide rails 4 of different diameter sizes may be selected dependent on different test models; it is only needed to cause the high-strength bolts 14 at two ends of the radial guide rails 4 to pass through corresponding guide grooves 12 so as to be fixedly connected with the driven flywheel 16, such that full face operations on different model areas are enabled.

[0044] Embodiment 3 [0045] A method of using the micro full-face borehole arrangement device for model test according to embodiment 1, specifically comprising:

[0046] (1) laying the rail mechanism in a model test zone, wherein a multi-unit rail mechanism may be optionally connected based on a distance the drilling mechanism is required to travel; adjusting, by a telescopic support, the two rails at two sides of the bar-shaped dual rails to an appropriate interval from the pulley; and based on experiment requirements, selecting an appropriate high-strength drilling head 6 to be mounted on a micro motor 5;

[0047] (2) placing the whole drilling mechanism on the rail mechanism, disposing the pulley 9 in the bar-shaped rail groove 11, and then moving the whole drilling mechanism to an operating zone of the model test;

[0048] (3) after the drilling mechanism arrives at the operating zone, controlling, by a controller 8, the support portion 7 to start, wherein a telescopic arm 15 (piston rod) of the servo cylinder extends out to elevate the drilling mechanism overhead of a tunnel space of the model test so as to detach it from the bar-shaped dual rails 1 and further maintain an enough stability of the drilling mechanism; and then removing the rail mechanism;

[0049] (4) controlling, by the controller 8, a first driving motor 18 and a second driving motor 19 to start working so as to adjust rotation of the radial guide rail 4 and rectilinear movement of the drilling head portion along the radial guide rail 4, to finally cause the high-strength drilling head 6 to align with a position to be bored;

[0050] (5) controlling, by the controller 8, to start the micro motor 5, wherein the micro motor 5 drives the high-strength drilling head 6 to perform a boring work; and [0051] (6) adjusting the high-strength drilling head 6 to other positions that need to be bored in a same manner as described in step (4) and step (5), thereby finishing boring operations on other positions.

Claims (5)

1. A micro full-face borehole arrangement device for a model test, comprising: a rail mechanism, a drilling mechanism, and a controller, wherein the drilling mechanism is provided on the rail mechanism and movable along the rail mechanism; the drilling mechanism comprises an annular rail section, a radial rail section, a drilling head portion, and a support portion, two ends of the radial rail section being disposed on the annular rail portion and peripherally rotatable along the annular rail portion, the drilling head portion being disposed on the radial rail portion and rectilinearly movable along the radial rail section, and the support portion being disposed outside of the annular rail section for fixing the entire drilling mechanism; and the controller is connected to the annular rail section, the radial rail section, the drilling portion, and the support portion, respectively;

the rail mechanism comprises bar-shaped dual rails and a telescopic support, wherein the telescopic support is disposed between the bar-shaped dual rails and connects the bar-shaped dual rails, a bar-shaped rail groove being provided on the bar-shaped dual rails;

the annular rail section comprises an annular guide rail, a driven flywheel, a first driving motor, and a crankset; a plurality of laps of concentric rail grooves are provided on the annular guide rail; the first driving motor is mounted at an outer periphery of the annular guide rail and connected to the crankset; the crankset is engaged with the driven flywheel, and the first driving motor is electrically connected to the controller; and the radial rack section comprises a radial guide rail and a high-strength bolt, wherein two ends of the radial guide rail are connected to the high-strength bolt, the high-strength bolt being fixedly connected to the driven flywheel through the rail groove.

(2) placing the whole drilling mechanism on the rail mechanism, disposing the pulley in the bar-shaped rail groove, and then moving the whole drilling mechanism to an operating zone of the model test;

15

2. The micro full-face borehole arrangement device for a model test according to claim 1, wherein the drilling head portion comprises a micro motor and a drilling head, the drilling head being combined with an output shaft of the micro motor, the micro motor being electrically connected to the controller.

(3) after the drilling mechanism arrives at the operating zone, controlling, by a controller, a support portion to start, wherein the support portion extends out to elevate the drilling mechanism overhead of a tunnel space of the model test, and then removing the rail mechanism;

3. The micro full-face borehole arrangement device for model test according to claim 2, wherein a bottom of the micro motor is provided with two micro gearwheels, the two gearwheels being connected by transmission via the second driving motor; a radial tooth space is provided on the radial guide rail; the micro gearwheels are provided inside the radial tooth space and driven to travel by the second driving motor, the second driving motor being electrically connected to the controller.

(4) adjusting, by the controller, rotation of the radial guide rail and rectilinear movement of a drilling head portion along the radial guide rail, to finally cause the drilling head to align with a

20 position to be bored;

4. The micro full-face borehole arrangement device for a model test according to claim 1, wherein the support portion is optionally a servo cylinder, the servo cylinder being electrically connected to the controller; and three support portions are provided at an outer side of the annular guide rail, the three support portions being evenly distributed at the outer periphery of the annular guide rail.

5. The micro full-face borehole arrangement device for a model test according to claim 2, wherein a running support is provided at two sides of the annular guide rail, and a pulley is provided at a

5 bottom end of the running support, the pulley being disposed in the bar-shaped rail groove.

6. The micro full-face borehole arrangement device for a model test according to claim 1, wherein the controller is optionally a single-chip machine.

7. A method of using the micro full-face borehole arrangement device for model test according to any one of claims 1~6, comprising steps of:

10 (1) laying the rail mechanism in a model test zone, and mounting an appropriate high strength drilling head on the micro motor;

(5) starting, by the controller, the micro motor, which drives the drilling head to perform a boring operation; and (6) finishing boring operations on other positions following a same manner as described in step (4) and step (5)