Collapse hole blocking treatment method for deep hole of deep broken surrounding rock

Abstract

The invention discloses a hole collapse and blockage treatment method for deep holes in deep broken surrounding rock, and relates to the technical field of rubber cutting. Preparing a corresponding tool according to the inclination direction of the deep hole; processing through holes; a drilling machine is used for drilling while water injection is conducted, and blockages are removed; impurity removal treatment; according to the method, the multi-step mode of high-pressure water cleaning, drilling while water injection through hole penetrating and high-pressure air cleaning is combined, caved broken stones and silt are effectively removed, blockage residues are avoided, it is ensured that a hole channel is unblocked, the construction efficiency is improved, the cleaning efficiency is high, and practicability is higher; meanwhile, the equipment damage risk is reduced, the service life of construction equipment is prolonged, and the construction safety and the construction efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction, and particularly to a method for treating the collapse and blockage of deep holes in deeply fractured surrounding rock. Background Art

[0002] During the processes of mine exploitation, underground engineering, and geological exploration, due to the loose structure of deeply fractured surrounding rock, the phenomenon of hole collapse is likely to occur during drilling. Usually, within a few hours after the hole is formed, hole collapse may occur, resulting in the blockage of the hole passage, especially in geological conditions such as fault fracture zones. Hole collapse not only affects the construction progress but may also cause the drill bit to become stuck or the hole passage to be completely blocked, thereby damaging the equipment and even affecting the normal progress of in-hole monitoring work.

[0003] Currently, the methods for treating the collapse of deep holes in fractured surrounding rock are relatively limited. In most cases, the blocked drill holes are abandoned and new hole positions are drilled again. Especially in the case of severe blockage, the construction party often directly abandons the formed holes; this not only increases the economic cost and time cost of construction but also leads to low efficiency.

[0004] The existing methods for treating hole collapse mainly include mechanical and chemical means, but these methods often have problems such as incomplete cleaning, complex operation, and low efficiency when cleaning the collapsed hole. Especially in upward, horizontal, and downward deep holes, due to the influence of gravity, mud flow, and the accumulation of collapsed materials, the difficulty of cleaning the blockage is greater. Traditional treatment methods are often difficult to adjust according to the different inclination angles of the hole passage, affecting the cleaning effect and construction efficiency.

[0005] Therefore, there is an urgent need for a method for treating the collapse and blockage of deep holes in fractured surrounding rock with strong adaptability and high efficiency, which can effectively deal with the problem of hole collapse in deep holes of fractured surrounding rock with different inclination angles and reduce the economic and time costs in construction. Summary of the Invention

[0006] The purpose of the present invention is to provide a method for treating the collapse and blockage of deep holes in deeply fractured surrounding rock, aiming to solve the problems of low construction efficiency and high cost existing in the above background art.

[0007] To achieve the above object, the present invention adopts the following technical solutions: A method for treating the collapse and blockage of deep holes in deeply fragmented surrounding rock, comprising the following steps: S1. Preliminary preparation; Prepare corresponding tools according to the inclination direction of the deep hole. For upward-inclined and horizontal deep holes, a high-pressure water pump and a drill rig need to be prepared. For downward-inclined deep holes, a high-pressure air blower and a drill rig need to be prepared; S2. Through-hole treatment; When the hole is completely blocked by gravel and sediment, use the drill rig to drill while injecting water to remove the blockage, and then pull out the through-hole device; S3. Cleaning treatment; For upward-inclined and horizontal deep holes: Use high-pressure water to wash multiple times until there is no residual gravel and sediment in the deep hole; For downward-inclined deep holes: Fill the deep hole with water, apply the high-pressure air blower at the hole opening, blow high-pressure air into the hole through the air duct, and a return air member is welded to the front end of the air duct in a tripod shape, which can change the blowing direction to blow out the gravel, sediment and water from the deep hole. Repeatedly fill with water and clean until the hole is clean.

[0008] Further, when treating upward-inclined and horizontal deep holes, preliminary cleaning can be carried out. Connect the cleaning pipeline through the high-pressure water pump, and a high-pressure water jet head is equipped at the front end of the pipeline, which can change the water flow jet direction into a mushroom shape, and clean the collapsed gravel and sediment out of the deep hole through the impact of the water flow.

[0009] Further, in the through-hole treatment step, the drill rig, the water injector, multiple sections of hollow drill pipes, a reversely installed hollow hole opener and a normally installed hollow hole opener are connected in sequence. Another interface of the water injector is connected to the high-pressure water pump, and the blockage is removed by drilling while injecting water, avoiding the hard blockage of the drill bit and reducing the wear of the drill bit.

[0010] Further, the water injector has three interfaces, two of which are respectively connected to the drill rig and the drill pipe, and the other interface is connected to the high-pressure water pump.

[0011] Further, the multiple sections of hollow drill pipes are connected end to end to realize the adjustment of the length. During drilling, high-pressure water can reach the blockage from the center of the drill pipe.

[0012] Further, the return air member is in a shape of a sharp cone in the middle and a concave disc on the periphery, which can change the blowing direction of the high-pressure air.

[0013] The present invention has the following beneficial effects: The present invention provides a method for treating the collapse and blockage of deep holes in deeply fragmented surrounding rock. By combining multiple steps of high-pressure water cleaning, drilling while injecting water through the hole, and high-pressure air cleaning, the collapsed gravel and sediment are effectively removed, avoiding the residue of the blockage, ensuring the smoothness of the hole, improving the construction efficiency, and having a high cleaning efficiency: For upward-inclined, horizontal and downward-inclined deep holes, the present invention designs different through-hole and cleaning steps, which can flexibly adapt to different types of deep holes and has stronger practicability.

[0014] Through scientific hole penetration treatment and cleaning methods, problems such as drill bit jamming and blockage are avoided, effectively reducing the risk of equipment damage, extending the service life of construction equipment, and improving construction safety at the same time; compared with traditional methods, the need for re-drilling and equipment replacement is reduced, construction costs are lowered, and the construction cycle is shortened through efficient cleaning steps, saving construction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cleaning method for the up-dip deep hole caving in the present invention; Figure 2 It is a schematic diagram of the hole penetration treatment for the up-dip deep hole caving in the present invention; Figure 3 It is a schematic diagram of the hole penetration treatment for the down-dip deep hole caving in the present invention; Figure 4 It is a schematic diagram of using high-pressure air to clean blockages in the down-dip deep hole in the present invention; In the figure: 1, chamber wall; 2, fractured surrounding rock; 3, fault fracture zone; 4, high-pressure water pump; 5, high-pressure water jet head; 6, drill rig; 7, water injector; 8, hollow drill pipe; 9, hollow opening cutter; 10, high-pressure air blower; 11, air duct; 12, air return part. DETAILED DESCRIPTION OF THE INVENTION

[0016] As Figures 1 to 4 shown, a method for treating caving and blockage of deep holes in deeply fractured surrounding rock includes the following steps: S1. Preliminary preparation: Prepare corresponding tools according to the inclination direction of the deep hole. For up-dip and horizontal deep holes, a high-pressure water pump 4 and a drill rig 6 need to be prepared. For down-dip deep holes, a high-pressure air blower 10 and a drill rig 6 need to be prepared; S2. Hole penetration treatment: When the hole is completely blocked by gravel and sediment, use the drill rig 6 to drill while injecting water to remove the blockage, and then pull out the hole penetration device; S3. Debris cleaning treatment: For up-dip and horizontal deep holes: Use high-pressure water to wash multiple times until there is no residual gravel and sediment in the deep hole; For down-dip deep holes: Fill the deep hole with water, the high-pressure air blower 10 acts at the hole opening, and high-pressure air is blown into the hole through the air duct 11. The front end of the air duct 11 is welded with an air return part 12 in a tripod shape, which can change the blowing direction to blow out the gravel, sediment and water from the deep hole. Repeatedly fill with water and clean until the hole is clean.

[0017] For up-dip and horizontal deep holes, after the preliminary preparation, preliminary cleaning can be carried out first. Connect the cleaning pipeline through the high-pressure water pump 4, and a mushroom-shaped high-pressure water jet head 5 is equipped at the front end of the pipeline, so that the high-pressure water changes the flow direction, and the collapsed gravel and sediment are cleaned out of the deep hole by the impact of the water flow, and then the hole penetration treatment and debris cleaning treatment are carried out.

[0018] In the through-hole treatment step, the drill 6, the water injector 7, the multi-section hollow drill pipe 8, the reversely installed hollow hole opener 9 and the normally installed hollow hole opener 9 are connected in sequence. Another interface of the water injector 7 is connected to the high-pressure water pump 4. Water is injected while drilling to remove blockages, avoiding hard blockages that jam the drill and reducing wear on the drill bit. The two hollow hole openers 9 are symmetrically welded to each other. During the through-hole process, the normally installed hole opener 9 is mainly used to remove blockages. Some of the cut blockages scatter backward along the advancing direction of the drill bit 6, which may cause the drill bit to be blocked and the device cannot be pulled out. At this time, the reversely installed hole opener 9 can be used to clean the blockages and smoothly pull out the through-hole device.

[0019] The water injector 7 has three interfaces, two of which are horizontal interfaces respectively connected to the drill 6 and the hollow drill pipe 8, and the other vertical interface is connected to the high-pressure water pump 4.

[0020] The multi-section hollow drill pipes 8 are connected end to end, enabling the adjustment of the length. While drilling, high-pressure water can reach the blockage through the center of the drill pipe.

[0021] The air return part 12 is in the shape of a sharp cone in the middle and a concave disc on the periphery, which can change the blowing direction of the high-pressure air; the air duct 11 and the air return part 12 are welded together through a tripod.

[0022] The specific operation process of the present invention is as follows: 1. A method for treating the collapse and blockage of fragmented surrounding rock suitable for upward and horizontal deep holes: Preliminary preparation and preliminary cleaning: Connect the cleaning pipeline through the high-pressure water pump 4, and a mushroom-shaped high-pressure water spray head 5 is equipped at the front end of the pipeline to wash out the collapsed gravel and sediment from the deep hole and preliminarily clean the hole; Through-hole treatment: When the gravel and sediment completely block the hole, use the drill, inject water while drilling, and at the same time inject water through the hollow drill pipe 8 to loosen the blockage and gradually remove it, and then pull out the through-hole device; Re-cleaning: After the through-hole treatment is completed, use high-pressure water to wash the hole again to ensure that there is no residual gravel and sediment in the hole and it reaches a smooth state.

[0023] 2. A method for treating the collapse and blockage of fragmented surrounding rock suitable for downward deep holes: Preliminary preparation and through-hole treatment: Use the drill 6 to inject water while drilling to remove blockages, and pull out the through-hole device after the through-hole; High-pressure air cleaning: After filling the deep hole with water, connect the high-pressure air source at the hole opening, change the blowing direction through the tripod connecting the air return part 12, and blow high-pressure air to quickly blow out the water, gravel and sediment from the deep hole. Repeat the operation until the hole is cleaned.

Claims

1. A method for treating the collapse and blockage of deep holes in deeply fractured surrounding rock, characterized in that, It includes the following steps: S1. Preliminary preparation: Prepare corresponding tools according to the inclination direction of the deep hole. A high-pressure water pump and a drill are required for upward-inclined and horizontal deep holes, while a high-pressure air blower and a drill are required for downward-inclined deep holes. S2. Through-hole treatment: When the hole is completely blocked by gravel and sediment, use the drill and inject water while drilling to remove the blockage, and then pull out the through-hole device. S3. Debris removal treatment: For upward-inclined and horizontal deep holes: Use high-pressure water to flush multiple times until there is no residual gravel and sediment in the deep hole. For downward-inclined deep holes: Fill the deep hole with water, apply the high-pressure air blower at the hole opening, and blow high-pressure air into the hole through the air duct. The front end of the air duct is welded with a return-air piece in a tripod shape, which can change the blowing direction to blow out the gravel, sediment and water from the deep hole. Repeatedly fill with water and clean until the hole is clean.

2. The method for dealing with the collapse hole blockage according to claim 1, wherein, When dealing with upward-inclined and horizontal deep holes, preliminary cleaning can be carried out. Connect the cleaning pipeline through a high-pressure water pump. The front end of the pipeline is equipped with a high-pressure water jet head that can change the water flow jet direction into a mushroom shape, and clean the collapsed gravel and sediment out of the deep hole through the impact of the water flow.

3. The method for treating the collapse hole blockage according to claim 1, wherein, In the through-hole treatment step, the drill, the water injector, multiple sections of hollow drill pipes, a reversely installed hollow hole opener and a normally installed hollow hole opener are connected in sequence. Another interface of the water injector is connected to the high-pressure water pump. Drill and inject water at the same time to remove the blockage, avoiding the blockage being hard and jamming the drill and reducing the wear on the drill bit.

4. The method for dealing with the collapse hole blockage according to claim 3, wherein, The water injector has three interfaces, two of which are respectively connected to the drill and the drill pipe, and the other interface is connected to the high-pressure water pump.

5. The method for treating the collapse hole blockage according to claim 3, wherein, The multiple sections of hollow drill pipes are connected end to end, which can realize the adjustment of the length. At the same time of drilling, high-pressure water can reach the blockage from the center of the drill pipe.

6. The method for treating the collapse hole blockage according to claim 1, wherein The return-air piece is in a shape with a pointed cone in the middle and a concave disc on the periphery, which can change the blowing direction of the high-pressure air.

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