Drilling, sealing and injecting integrated device for crushed coal and rock mass and using method of drilling, sealing and injecting integrated device

Abstract

The invention discloses a broken coal and rock mass drilling, sealing and injecting integrated device and a using method, and belongs to the technical field of coal and rock mass grouting reinforcement. The drilling, sealing and injecting integrated device comprises a self-drilling type drill bit, a grouting pipe body and a self-sealing hole type pipe body. The front end of the drilling, sealing and injecting integrated device is connected with a self-drilling type drill bit, the grouting pipe body serves as a grouting pipe and can replace a drill rod, and the tail end of the drilling, sealing and injecting integrated device is connected with drilling equipment to drill to the designed depth without pushing the grouting pipe after the drill rod is withdrawn. The serious defect that a grouting pipe cannot be pushed to a designed position due to hole collapse caused by the fact that a broken coal and rock mass retreats a drill rod is avoided; according to the drilling, sealing and grouting integrated device, a hollow circular truncated cone rubber hole sealing plug of a self-sealing hole type pipe body is utilized, interference extrusion hole sealing is automatically achieved by means of thrust of drilling equipment in the grouting hole drilling process, and the tedious working procedure of hole sealing after a grouting pipe is pushed in in a traditional coal and rock mass grouting technology and uncontrollable hole sealing quality are avoided; the drilling, sealing and grouting integrated device can drill to the designed depth at a time by additionally installing grouting pipe bodies with different lengths and numbers, and after drilling equipment is detached and connected with a grouting system, grouting reinforcement can be conducted on broken coal and rock mass; according to the drilling, sealing and grouting integrated device for the crushed coal and rock mass and the using method, the drilling, sealing and grouting integrated device is high in drilling, hole sealing and grouting efficiency, good in quality, high in applicability, simple and practical, the functions of self-drilling, grouting pipe descending, self-sealing and grouting of the crushed coal and rock mass can be achieved at a time, the grouting reinforcing effect is guaranteed, and meanwhile the problem of excavation continuing tension can be effectively solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of coal rock mass grouting reinforcement, and in particular relates to a broken coal rock mass drilling, sealing and grouting integrated device and a use method thereof. Background Art

[0002] In coal mines, non-coal mines, transportation tunnels, and other geotechnical engineering projects, broken and unstable coal and rock masses are commonly encountered. Grouting reinforcement can significantly improve the strength, deformation resistance, and integrity of broken coal and rock masses, and is widely used in the field of broken coal and rock reinforcement projects. Due to the development of fissures in broken coal and rock masses, grouting holes are prone to collapse after drilling and withdrawing the drill. This makes the traditional grouting operation of drilling first and then inserting the grouting pipe difficult, inefficient, and ineffective. Therefore, practical projects urgently need a grouting reinforcement device that can achieve drilling, sealing, and grouting functions in one, as well as a simple and efficient construction process. Summary of the Invention

[0003] The purpose of the present invention is to provide an integrated device for drilling, sealing and grouting of broken coal and rock masses and a method for using the device.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] An integrated drilling, sealing and grouting device for crushed coal and rock mass, characterized by comprising: a self-drilling drill bit, a grouting pipe body and a self-sealing hole pipe body;

[0006] The self-drilling drill bit has slurry outlet holes in both the axial and radial directions, the slurry outlet holes are connected to the internal channel of the grouting pipe body, and the tail of the self-drilling drill bit has an internal thread;

[0007] The grouting pipe body is a hollow pipe body with an external thread at the upper end and an internal thread at the lower end. The outer surface of the grouting pipe body has grouting holes distributed at intervals and in a staggered manner.

[0008] The self-sealing hole type pipe body comprises a sealing hole hollow pipe, an annular baffle and a hollow frustum rubber sealing plug. The upper and lower ends of the sealing hole hollow pipe are both provided with external threads. The annular baffle is welded to the upper position of the external thread of the lower end of the sealing hole hollow pipe. The hollow frustum rubber sealing plug is interference fit downward from the upper end of the sealing hole hollow pipe to the outer surface of the sealing hole hollow pipe, and the large diameter end of the hollow frustum rubber sealing plug is in contact with the annular baffle.

[0009] The upper end of the grouting pipe body is screwed to the self-drilling drill bit, and the lower end is screwed to the upper end of the sealing hollow pipe, or is screwed to the upper end of other grouting pipe bodies to form an extended grouting pipe body. The lower end of the extended grouting pipe body is screwed to the upper end of the sealing hollow pipe, and the lower end of the sealing hollow pipe is connected to the drilling equipment or the grouting stop valve, and the grouting stop valve is connected to the grouting pipeline.

[0010] The method for using the integrated drilling, sealing and injection device for crushed coal and rock mass comprises the following steps:

[0011] S1: Connect the tail end of the drilling, sealing and grouting integrated device, i.e., the lower end of the sealing hollow pipe, to the drilling equipment, then move the drilling, sealing and grouting integrated device to the designed drilling position of the coal rock wall, start the drilling equipment to drill, and during the drilling process, consider whether to increase the grouting pipe body or extend the grouting pipe body according to the designed depth of the grouting drilling hole. During the grouting hole drilling process, the hollow cone rubber sealing plug of the self-sealing pipe body is squeezed with the grouting hole wall to achieve self-sealing of the grouting hole. After drilling to the designed depth, remove the drilling equipment;

[0012] S2: Connect the tail end of the drilling, sealing and grouting integrated device, i.e. the lower end of the sealing hollow tube, to the grouting pipeline through the grouting stop valve, and then start the grouting equipment to carry out single-liquid or double-liquid grouting reinforcement on the pre-grouting areas such as the broken coal rock mass and the empty area. After the grouting index is reached, close the grouting stop valve to stop the grouting, and finally remove the grouting pipeline to complete the drilling, sealing and grouting integrated grouting reinforcement operation of the broken coal rock mass.

[0013] Beneficial effects of the present invention:

[0014] Compared with the traditional broken coal rock grouting drilling and sealing device and process, the drilling, sealing and injection integrated device uses a self-drilling drill bit to drill to the designed depth, and then pushes the grouting pipe without withdrawing the drill rod. The grouting pipe body is both a grouting pipe and can replace the drill rod, eliminating the serious defect of the grouting pipe being unable to be pushed to the designed position due to the collapse of the hole caused by withdrawing the drill rod in the broken coal rock; the drilling, sealing and injection integrated device uses a hollow cone rubber sealing plug with a self-sealing hole body, which relies on the thrust of the drilling equipment to automatically achieve interference squeeze sealing during the grouting hole drilling process, avoiding the traditional The coal rock grouting process has the tedious process of pushing the grouting pipe and then sealing the hole, and the uncontrollable sealing quality; the drilling, sealing and grouting integrated device can drill to the designed depth at one time by adding grouting pipes of different lengths and numbers; a broken coal rock drilling, sealing and grouting integrated device and its use method have high drilling, sealing and grouting efficiency, good quality, strong applicability, simplicity and practicality, and can realize the self-drilling, grouting pipe installation, self-sealing and grouting functions of the broken coal rock at one time, ensuring the grouting reinforcement effect while effectively alleviating the problem of tense mining connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A front view structural diagram of an integrated drilling, sealing and injection device for crushing coal and rock mass provided by an embodiment of the present invention;

[0016] Figure 2 A front view structural diagram of a self-drilling drill bit provided by an embodiment of the present invention;

[0017] Figure 3 A front view structural diagram of a grouting pipe body provided in an embodiment of the present invention;

[0018] Figure 4 A front view structural diagram of a self-sealing hole type pipe body provided by an embodiment of the present invention;

[0019] Figure 5 A cross-sectional view of a self-drilling drill bit provided by an embodiment of the present invention;

[0020] Figure 6 A cross-sectional view of a grouting pipe body provided in an embodiment of the present invention;

[0021] Figure 7 A cross-sectional view of a self-sealing hole pipe provided in an embodiment of the present invention.

[0022] In the figure: 1. Self-drilling drill bit, 2. Grouting pipe body, 3. Self-sealing pipe body, 4. Slurry outlet hole, 5. Slurry outlet hole, 6. Sealing hollow pipe, 7. Hollow cone rubber sealing plug, 8. Circular baffle, 9. Grouting stop valve or drilling equipment, 10. Grouting stop valve switch, 11. Grouting pipeline, 12. External thread on the upper end of the grouting pipe body, 13. External thread on the upper end of the sealing hollow pipe, 14. External thread on the lower end of the sealing hollow pipe, 15. Internal thread on the tail of the self-drilling drill bit, 16. Internal thread on the lower end of the grouting pipe body. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and examples, but they do not constitute any limitation to the present invention.

[0024] Example 1

[0025] like Figure 1-Figure 7As shown, a device for drilling, sealing and grouting a broken coal rock mass is characterized in that it comprises: a self-drilling drill bit 1, a grouting pipe body 2 and a self-sealing hole type pipe body 3; the self-drilling drill bit has slurry holes 4 in the axial and radial directions, the slurry holes 4 are connected to the internal channel of the grouting pipe body 2, and the tail of the self-drilling drill bit 1 has an internal thread 15; the grouting pipe body 2 is a hollow pipe body, with an external thread 12 at the upper end and an internal thread 16 at the lower end, and the outer surface of the grouting pipe body 2 has slurry holes 5 distributed at intervals and staggeredly; the self-sealing hole type pipe body 3 comprises a sealing hole hollow pipe 6, an annular baffle 8 and a hollow frustum rubber sealing plug 7, the sealing hole hollow pipe 6 has external threads 13 and 14 at the upper and lower ends, and the annular baffle 8 is welded to the outer thread of the lower end of the sealing hole hollow pipe 6 At the upper position of the thread 14, the hollow conical rubber sealing plug 7 is interference fit downwardly from the upper end of the sealing hollow tube 6 to the outer surface of the sealing hollow tube 6, and the large diameter end of the hollow conical rubber sealing plug 7 is fitted with the annular baffle 8; the grouting pipe body 2 is screwed with the internal thread 15 at the tail of the self-drilling drill bit 1 through its upper end external thread 12, and its lower end internal thread 16 is screwed with the external thread 13 at the upper end of the sealing hollow tube 6, or is screwed with the internal thread 12 at the upper end of other grouting pipe bodies to extend the grouting pipe body, and the internal thread 16 at the lower end of the extended grouting pipe body is screwed with the external thread 13 at the upper end of the sealing hollow tube 6, and the external thread 16 at the lower end of the sealing hollow tube 6 is connected to the drilling equipment or to the grouting stop valve 9, and the grouting stop valve 9 is connected to the grouting pipeline 11.

[0026] Example 2

[0027] The method for using the integrated drilling, sealing and injection device for crushed coal and rock mass comprises the following steps:

[0028] S1: Connect the tail end of the drilling, sealing and grouting integrated device, i.e., the lower end of the sealing hollow pipe, to the drilling equipment. Then, move the drilling, sealing and grouting integrated device to the designed drilling position of the coal rock wall, start the drilling equipment and start drilling. During the drilling process, consider whether to install an extended grouting pipe body and the number of extended grouting pipe bodies according to the designed grouting drilling depth. During the grouting hole drilling process, the hollow cone rubber sealing plug of the self-sealing pipe body is squeezed with the borehole wall to achieve self-sealing of the grouting hole. After drilling to the designed depth, remove the drilling equipment.

[0029] S2: Connect the tail end of the drilling, sealing and grouting integrated device, i.e. the lower end of the sealing hollow tube, to the grouting pipeline through the grouting stop valve, and then start the grouting equipment to carry out single-liquid or double-liquid grouting reinforcement on the pre-grouting areas such as the broken coal rock mass and the empty area. After the grouting index is reached, close the grouting stop valve to stop the grouting, and finally remove the grouting pipeline to complete the drilling, sealing and grouting integrated grouting reinforcement operation of the broken coal rock mass.

[0030] The above description is only a preferred specific implementation method within the scope of protection of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. An integrated drilling, sealing and injection device for crushed coal and rock mass, characterized in that: include: Self-drilling drill bits, grouting pipe bodies and self-sealing pipe bodies; The self-drilling drill bit has slurry outlet holes in both the axial and radial directions, the slurry outlet holes are connected to the internal channel of the grouting pipe body, and the tail of the self-drilling drill bit has an internal thread; The grouting pipe body is a hollow pipe body with an external thread at the upper end and an internal thread at the lower end. The outer surface of the grouting pipe body has grouting holes distributed at intervals and in a staggered manner. The self-sealing hole type pipe body comprises a sealing hole hollow pipe, an annular baffle and a hollow frustum rubber sealing plug. The upper and lower ends of the sealing hole hollow pipe are both provided with external threads. The annular baffle is welded to the upper position of the external thread of the lower end of the sealing hole hollow pipe. The hollow frustum rubber sealing plug is interference fit downward from the upper end of the sealing hole hollow pipe to the outer surface of the sealing hole hollow pipe, and the large diameter end of the hollow frustum rubber sealing plug is in contact with the annular baffle. The upper end of the grouting pipe body is screwed to the self-drilling drill bit, and the lower end is screwed to the upper end of the sealing hollow pipe, or is screwed to the upper end of other grouting pipe bodies to form an extended grouting pipe body. The lower end of the extended grouting pipe body is screwed to the upper end of the sealing hollow pipe, and the lower end of the sealing hollow pipe is connected to the drilling equipment or the grouting stop valve, and the grouting stop valve is connected to the grouting pipeline.

2. The method for using the above-mentioned integrated drilling, sealing and injection device for crushed coal and rock mass is characterized in that: The following steps are involved: S1: Connect the tail end of the drilling, sealing and grouting integrated device, i.e., the lower end of the sealing hollow pipe, to the drilling equipment, then move the drilling, sealing and grouting integrated device to the designed drilling position of the coal rock wall, start the drilling equipment to drill, and during the drilling process, consider whether to increase the grouting pipe body or extend the grouting pipe body according to the designed depth of the grouting drilling hole. During the grouting hole drilling process, the hollow cone rubber sealing plug of the self-sealing pipe body is squeezed with the grouting hole wall to achieve self-sealing of the grouting hole. After drilling to the designed depth, remove the drilling equipment; S2: Connect the tail end of the drilling, sealing and grouting integrated device, i.e. the lower end of the sealing hollow tube, to the grouting pipeline through the grouting stop valve, and then start the grouting equipment to carry out single-liquid or double-liquid grouting reinforcement on the pre-grouting areas such as the broken coal rock mass and the empty area. After the grouting index is reached, close the grouting stop valve to stop the grouting, and finally remove the grouting pipeline to complete the drilling, sealing and grouting integrated grouting reinforcement operation of the broken coal rock mass.

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