Directional drilling blasting pressure relief device and process
By combining guide rods and placing wire, the problem of inaccurate explosive placement in borehole blasting was solved, achieving precise explosive placement, reducing construction costs, and improving the controllability of blasting effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-10
AI Technical Summary
In existing technologies, inaccurate placement of explosives during borehole blasting affects the blasting effect and increases construction costs.
A combination device of guide rod and placing element is adopted. The placing element is slidably connected to the placing hole of the guide rod to achieve precise placement of explosives. After the guide rod is inserted into the borehole, the placing element drives the explosives to the designated position and releases them, ensuring the precise placement of explosives in the borehole.
It enables precise placement of explosives, reduces construction costs, and improves the controllability of blasting effects.
Smart Images
Figure CN121631907A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of blasting equipment, in particular to a directional drilling blasting pressure relief device and process. BACKGROUND
[0002] Before the coal roadway is excavated, the advanced long-distance directional drilling blasting pressure relief technology is used to advance the stress relief of the roadway head and two sides, so as to realize the advanced pressure relief of the excavated roadway. The long-distance directional drilling blasting is performed on the coal roadway excavation head and two sides within a range of 25-30m by using the super-long pressure relief directional drilling machine, which can reduce the damage of the support caused by the pressure relief hole of the side part in the later period, and improve the excavation pressure relief efficiency and single level.
[0003] In the prior art, when the internal part of the drilling hole is subjected to point blasting, the traditional arrangement method is prone to cause the blasting agent to be arranged out of position, thereby affecting the blasting effect.
[0004] In summary, the prior art has obvious inconvenience and defects in actual use, and therefore needs to be improved. SUMMARY
[0005] In view of the above defects, the present application aims to provide a directional drilling blasting pressure relief device and process, which can accurately control the drilling depth by arranging a blasting agent arrangement device and process, reduce the construction cost, and ensure accurate arrangement of the blasting agent, thereby effectively controlling the blasting.
[0006] In order to achieve the above-mentioned purpose, the present application provides a directional drilling blasting pressure relief device, characterized in that it comprises: A guide rod is inserted into the drilling hole after the drill bit drills, the inside of the guide rod is provided with a feeding hole, and the front end of the guide rod is provided with a releasable guide head; A feeding member is slidably connected to the inside of the feeding hole, the inside of the feeding member is filled with blasting agent, when feeding, the feeding member drives the blasting agent to be injected into the bottom of the guide rod, before the feeding member slides to the front end of the guide rod, the feeding member limits the position of the blasting agent, when the feeding member slides to the front end of the guide rod, the feeding member releases the blasting agent, and the guide rod retracts to drive the feeding member to be extracted from the hole and arrange the blasting agent inside the drilling hole.
[0007] In an embodiment, the front end of the feeding hole is provided with a plugging member, the plugging member is rotationally connected to the front end of the guide rod, and the plugging member is opened under the abutting action of the feeding member.
[0008] In an embodiment, the sealing member is provided with a rotating hole, the sealing member is provided with a sealing disc corresponding to the cloth hole, a torsion spring is arranged between the sealing member and the guide rod, and the sealing member is sealed to the bottom of the cloth hole under the action of the torsion spring.
[0009] In an embodiment, the cloth hole is provided with a sliding groove on both sides, the cloth member is provided with a sliding convex edge on both sides, the sliding convex edge is slidably connected to the inside of the sliding groove, the bottom of the cloth member is provided with a limiting member for limiting the sliding of the blasting agent, and the limiting member is forced to open to release the blasting agent when the sliding convex edge slides to the bottom of the sliding groove.
[0010] In an embodiment, the cloth member and the limiting convex edge are provided with a control channel, the control channel is provided with a sliding channel in the inside of the sliding convex edge, the sliding channel is slidably provided with a sliding contact, a pushing spring is arranged between the sliding contact and the sliding channel, the sliding contact extends to the outside of the bottom of the sliding convex edge, and the sliding contact is forced to slide to the inside of the sliding channel when the sliding convex edge slides to abut to the bottom of the sliding groove.
[0011] In an embodiment, the bottom of the control channel extends to the outside of the bottom of the cloth member, the limiting member is slidably connected to the bottom of the control channel, the inside of the control channel is provided with a hydraulic fluid, and the sliding contact drives the limiting member to slide.
[0012] In an embodiment, the limiting member comprises an arc-shaped plate and a sliding column arranged in the inside of the arc-shaped plate, and the sliding column is slidably connected to the inside of the control channel.
[0013] In an embodiment, the bottom of the arc-shaped plate is provided with a limiting plate, the limiting plate extends into the inside of the cloth hole when the sliding column slides to the inside of the control channel, and the limiting plate slides out of the cloth hole when the sliding column slides to the outside.
[0014] The application also provides a directional drilling and blasting pressure relief process, comprising the following steps: Step one, using a drilling machine, equipped with an air compressor to provide driving power for the pneumatic screw rod, using a measurement while drilling drill rod and directional drill bit to complete directional drilling construction; Step two, lowering the openable and closable guide head and guide rod into the directional drilling hole; Step three, segmentally feeding the water-gel blasting agent into the guide rod, the blasting agent end is provided with a suspension device to ensure that the blasting agent remains in the hole; Step four, segmentally withdrawing the guide rod according to the number of blasting agents fed; Step five, grouting and sealing the drilling hole to complete the directional drilling; Step six, respond to the gun, according to the blasting condition to evaluate the blasting effect; Step seven, after the evaluation meets the pressure relief strength requirement, start excavation, and use microseismic, stress and drilling method to carry out secondary test on pressure relief effect during excavation; Step eight, determine the excavation length according to the blasting effect, and then repeat the above process to form a cycle process.
[0015] The application provides a directional drilling blasting pressure relief device, which comprises: A guide rod is inserted into the drilling hole after drilling by a drill bit, an internal cloth hole is arranged in the guide rod, and a releasable guide head is arranged at the front end of the guide rod, so that the guide rod can be inserted into the inside of the drilling hole, and then the cloth hole in the inside of the guide rod is blocked by the guide head, so that the cloth hole is prevented from being blocked to affect the arrangement of the blasting agent and the blasting effect; A cloth piece is slidably connected to the inside of the cloth hole, the inside of the cloth piece is filled with the blasting agent, when the cloth piece is slid to the front end of the guide rod, the cloth piece releases the blasting agent, the guide rod is retracted to drive the cloth piece to be extracted from the hole and arrange the blasting agent in the inside of the drilling hole, at this time, the cloth piece can release the blasting agent in the inside to the bottom of the drilling hole, so that the accurate arrangement of the blasting agent can be realized, and when the guide rod is retracted, the guide rod can synchronously take out the cloth piece to leave the blasting agent in the inside, so that the arrangement effect of the blasting agent is realized, and the technical effect of the application is that the arrangement device and process of the blasting agent are arranged to accurately control the drilling depth, reduce the construction cost, ensure the accurate arrangement of the blasting agent, and effectively realize the control of the blasting. ACCURATE CONTROL OF DRILLING DEPTH
[0016] Figure 1 is a guide rod structure schematic diagram of the application; Figure 2 is a guide rod bottom section structure schematic diagram of the application; Figure 3 is a guide rod top section structure schematic diagram of the application; Figure 4 is a guide rod structure schematic diagram of the application; Figure 3 is an A part enlarged structure schematic diagram of the application; Figure 5 is a guide rod structure schematic diagram of the application; Figure 6 is a cloth piece structure schematic diagram of the application; Figure 7 is a schematic view of a cloth piece sectional structure of the present application; Figure 8 is a schematic view of a limiting piece sectional structure of the present application; In the figure, 1 is a guide rod, 2 is a guide head, 3 is a sliding groove, 4 is a blocking piece, 41 is a rotating hole, 42 is a blocking disc, 5 is a cloth piece, 51 is a control channel, 52 is a filling hole, 53 is a sliding convex edge, 6 is a thrust spring, 7 is a sliding contact, 8 is a limiting piece, 81 is a limiting plate, 82 is a sliding column, 83 is an arc plate. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0018] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.
[0019] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously satisfy the scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection claimed by the present application.
[0020] Reference is made to Figure 1 , Figure 2 and Figure 3The application provides a directional drilling blasting pressure relief device, which comprises a guide rod 1 which is inserted into a drilling hole after drilling by a drill bit, an inside of the guide rod 1 is provided with a distribution hole, a front end of the guide rod 1 is provided with a releasable guide head 2, so that the guide rod 1 can be inserted into the inside of the drilling hole, and then the distribution hole in the inside of the guide rod 1 is blocked by the guide head 2, so that the distribution hole is prevented from being blocked to affect the arrangement of blasting agents and the blasting effect. A distribution member 5 is slidably connected to the inside of the distribution hole, the inside of the distribution member 5 is filled with the blasting agents, when the distribution member 5 is distributed, the blasting agents are injected into the bottom of the guide rod 1 by the distribution member 5, before the distribution member 5 slides to the front end of the guide rod 1, the position of the blasting agents is limited by the distribution member 5, so that the blasting agents in the inside of the distribution member 5 are prevented from slipping off, the normal use of the blasting agents is affected, and the blasting effect is affected, when the distribution member 5 slides to the front end of the guide rod 1, the distribution member 5 releases the blasting agents, the guide rod 1 is retracted to drive the distribution member 5 to be extracted from the hole and to arrange the blasting agents into the inside of the drilling hole, at this time, the distribution member 5 can release the blasting agents in the inside to the bottom of the drilling hole, so that the accurate arrangement of the blasting agents can be realized, and when the guide rod 1 is retracted, the guide rod 1 can synchronously drive the distribution member 5 to be taken out, so that the blasting agents are left in the inside and the distribution effect of the blasting agents is realized.
[0021] In an embodiment, a front end of the distribution hole is provided with a blocking member 4, the blocking member 4 is rotationally connected to the front end of the guide rod 1, the blocking member 4 is opened under the abutting action of the distribution member 5, the blocking member 4 is pushed away by the pushing of the distribution member 5, so that the blocking member 4 is ensured to be extended out of the distribution hole, and the blasting agents in the inside of the distribution member 5 can be effectively arranged and pushed to the outside of the distribution hole, so that the distribution effect of the blasting agents is realized.
[0022] Specifically, in combination with Figure 4 and Figure 5 , in order to realize the installation and blocking effect of the blocking member 4, the blocking member 4 is provided with a rotating hole 41, the blocking member 4 is provided with a blocking disc 42 which is correspondingly arranged on the distribution hole, a torsion spring is arranged between the blocking member 4 and the guide rod 1, the blocking member 4 blocks the bottom of the distribution hole under the action of the torsion spring, at this time, the blocking disc 42 on the blocking member 4 can be directly abutted to the end of the distribution hole, so that the end of the distribution hole is blocked, and the distribution hole is prevented from being blocked and damaged by the slag in the inside of the drilling hole when the guide rod 1 is inserted, and the use of the distribution hole is affected.
[0023] In an embodiment, in order to achieve the control of the blasting agent inside the cloth piece 5, a sliding groove 3 is arranged on both sides of the cloth hole, a sliding convex edge 53 is arranged on both sides of the cloth piece 5, the sliding convex edge 53 is slidingly connected to the inside of the sliding groove 3, the cooperation between the sliding convex edge 53 and the sliding groove 3 limits the rotation of the cloth piece 5, prevents the cloth piece 5 from sliding inside the cloth hole, affects the installation position of the blasting agent, facilitates the subsequent installation and arrangement of the detonator, and the bottom of the cloth piece 5 is provided with a limiting piece 8 for limiting the sliding of the blasting agent. When the sliding convex edge 53 slides to the bottom of the sliding groove 3, the limiting piece 8 is forced to open to release the blasting agent. At this time, the limiting piece 8 can be used to block the cloth piece 5 that has reached the predetermined position and limit the sliding of the blasting agent inside. When the guide rod 1 is pulled to the predetermined position, the limiting piece 8 is opened at this time, the blasting agent inside the cloth piece 5 slides to the predetermined position under the action of gravity, and the distribution of the blasting agent is completed. The blasting agent can also be pushed out by a long rod after the cloth piece 5 is in place, which facilitates the distribution of the blasting agent in the transverse horizontal borehole and ensures the blasting effect.
[0024] Specifically, in order to achieve the cooperation and control between the cloth piece 5 and the sliding groove 3, a control channel 51 is arranged on the cloth piece 5 and the limiting convex edge. The control channel 51 is provided with a sliding channel inside the sliding convex edge 53. A sliding contact 7 is slidingly arranged inside the sliding channel. A thrust spring 6 is arranged between the sliding contact 7 and the sliding channel. The sliding contact 7 extends to the outside of the bottom of the sliding convex edge 53. When the sliding convex edge 53 slides to abut against the bottom of the sliding groove 3, the sliding contact 7 is forced to slide to the inside of the sliding channel. At this time, the sliding contact 7 slides, pushes the hydraulic fluid in the inside of the sliding channel and the control channel 51 to flow, and further pushes the limiting piece 8 to slide and release the blasting agent, thereby achieving the control of the blasting agent.
[0025] In an exemplary embodiment, in order to ensure the control effect of the limiting piece 8, the bottom of the control channel 51 extends to the outside of the bottom of the cloth piece 5, the limiting piece 8 is slidingly connected to the bottom of the control channel 51, the inside of the control channel 51 is provided with hydraulic fluid, the sliding contact 7 slidingly drives the limiting piece 8 to slide, thereby achieving the control of the state of the limiting piece 8 by changing the position of the cloth piece 5, and further ensuring that the state of the limiting piece 8 can be controlled by the hydraulic flow and the sliding effect of the sliding contact 7.
[0026] In an embodiment, in order to ensure the control of the state of the blasting agent by the sliding of the limiting piece 8, the limiting piece 8 comprises an arc-shaped plate 83 and a sliding column 82 arranged inside the arc-shaped plate 83, and the sliding column 82 is slidingly connected to the inside of the control channel 51.
[0027] In specific implementation,Figures 1-8 The bottom of the arc-shaped plate 83 is provided with a limiting plate 81, when the limiting member 8 slides to the axis position of the guide rod 1, the limiting plate 81 can limit the blasting agent inside the cloth member 5, preventing the blasting agent from sliding out, meanwhile, when the sliding column 82 slides to the inside of the control channel 51, the limiting plate 81 extends to the inside of the cloth hole, when the sliding column 82 slides to the outside, the limiting plate 81 slides out of the cloth hole, at this time, the blasting agent can freely slide out of the inside of the cloth member 5, and is arranged into the inside of the drill hole, preventing the blasting agent of the cloth member 5 from being affected when the guide rod 1 is pulled out.
[0028] Further, in use, by the existing drill hole, the corresponding position is drilled, after drilling, the corresponding drill bit can be pulled out, then the guide rod 1 is inserted into the inside of the drill hole, at this time, the cloth member 5 has not been placed into the inside of the cloth hole, when the blasting agent needs to be loaded, at this time, the corresponding blasting agent is directly placed into the filling hole 52 of the cloth member 5, then the cloth member 5 is placed into the inside of the cloth hole, the cloth member 5 slides from the cloth hole to the bottom of the guide rod 1, or a push rod is directly inserted to push the cloth member 5 into the bottom of the guide rod 1, when the cloth member 5 is pushed to the bottom of the guide rod 1, the sliding convex edge 53 at this time abuts to the bottom of the sliding groove 3, and triggers the sliding contact 7, is compressed into the inside of the sliding channel, thereby pushing the limiting member 8 to rotate, releasing the blasting agent inside, completing the cloth process of the blasting agent.
[0029] In the embodiment, the present application provides a device selection in use, the device selects the ZDY15000LD caterpillar type full hydraulic directional drill for coal mine, the drill rod selects the Φ89mm spiral cable drill rod with the length of 3m and the Φ95-78mm hollow drill rod with the length of 3m, the drill bit selects the Φ120mm PDC drill bit and the Φ108-78mm open-close type drill bit, selects the air compressor to discharge residue, the model of the screw type mobile air compressor for coal mine is MLGF23 / 20-200G.
[0030] In construction, a directional drilling blasting pressure relief process comprises the following steps: Step one, using the drill, the air compressor is used to provide driving power for the pneumatic screw drill, the directional drilling construction is completed by using the measurement drill rod and the directional drill bit while drilling; Step two, the open-close type guide head 2 and the guide rod 1 are lowered into the directional drill hole; Step three, the water gel blasting agent is sent into the guide rod 1 in sections, the blasting agent end is provided with a suspension device, ensuring that the blasting agent remains in the hole; Step four, according to the number of sent blasting agent, the guide rod 1 is withdrawn in sections; Step five, grouting and sealing the borehole, and completing the drilling; Step six, blasting, and evaluating the blasting effect according to the blasting situation; Step seven, after the evaluation meets the pressure relief strength requirement, starting the excavation, and using microseismic, stress, and drilling method for secondary testing of pressure relief effect during the excavation; Step eight, determining the excavation length according to the blasting effect, and then repeating the above process to form a cycle process.
[0031] 1. Charge scheme (1) Use ZDY15000LD coal mine crawler-mounted full-hydraulic directional tunnel drill to send Φ95mm hollow drill rod into the hole, and rotate the drill rod during the sending process. Use a screw type mobile air compressor to continuously supply air to discharge the residual coal powder in the drill rod.
[0032] (2) Rotate and fasten the coal mine permissible gas extraction water-gel explosive column by thread, and then wrap it with adhesive tape for reinforcement, and then fill it into the hole through the Φ95mm hollow drill rod.
[0033] (3) After the coal mine permissible gas extraction water-gel explosive column is filled, connect the air supply device to the tail of the hollow drill rod. The air supply device is connected to the screw type mobile air compressor by a Φ51mm high-pressure rubber hose.
[0034] (4) After the air supply device is installed, start the screw type mobile air compressor, and use compressed air to push the coal mine permissible gas extraction water-gel explosive column to the specified position. The pushing time should not exceed 20 minutes. After the pushing is completed, remove the air supply device.
[0035] (5) Push the drill rod into the hollow drill rod by hand or drill rod pushing machine. Measure the length of the exposed drill rod with a tape measure to determine the specific pushing position of the coal mine permissible gas extraction water-gel explosive column. If the drill rod has been pushed to the specified position, use the directional tunnel drill to withdraw the hollow drill rod from the hole one by one. During the withdrawal process, determine whether the explosive has slipped out of the hole by marking the position of the drill rod. If the drill rod has slipped out, push the explosive back to the specified position after withdrawing a single drill rod, and ensure that the error of the explosive pushing position does not exceed 2cm. Repeat the above operation until the length of the withdrawn hollow drill rod is consistent with the designed charge length. If the explosive has not been pushed to the specified position, reconnect the air supply device and continue to push.
[0036] (6) Repeat the above operation until the charge length reaches the designed charge length.
[0037] (7) The drill head needs to be pushed separately by hand or drill rod pushing machine.
[0038] (8) After the above steps are completed, withdraw the remaining drill rod and drill rod from the hole.
[0039] 2. Explosive specifications The coal mine permissible gas extraction water glue explosive column has a length of 1 m, a diameter of 63 mm, and a weight of about 3.3 kg, and the weight of each box is 20 kg.
[0040] Precise measurement of the position of the explosive column After the coal mine permissible gas extraction water glue explosive column is pushed into the hollow drill rod by using the cannon rod, the exposed cannon rod length is measured by using a tape measure to determine the specific pushing position of the explosive column. After the explosive column is pushed into position, the drill rod is withdrawn, and the position of the cannon rod needs to be marked. If the explosive column in the hole slips, the cannon rod is used to push the explosive column to the marked position again, and the error of the explosive column in the specified position is ensured to be not more than 2 cm.
[0041] 4. Cannon head manufacturing When manufacturing the cannon head, no less than 4 detonators are used. First, the detonator foot line is left out for 100 mm, and the excess is cut off. The detonator foot line and the bus bar are twisted for not less than 10 turns, and then the twisted part of the detonator and the bus bar is tightly wrapped with insulating tape. The positive and negative foot lines are separated to avoid short circuiting. Then, waterproof tape is used to wrap for not less than 2 turns, and the overlapping part of the tape needs to be tightly sealed without any gaps. Then, the detonator is inserted into the middle position of the explosive, and transparent tape is used to tightly wrap the explosive to ensure that the detonator is in close contact with the explosive. Finally, the cannon head is placed, the bus bar head is twisted for short circuiting, and insulating tape is used to tightly wrap the exposed core wire.
[0042] 5. During the hole sealing process, Adopting bag + cement hole sealing (1) Before construction, it is necessary to ensure that the drill hole is clean, and to check and confirm whether the hole sealing pipe, hole sealing materials, grouting equipment, etc. are complete and intact.
[0043] (2) A bag with a length of 5 m is used to seal the hole at the hole opening, and cement is used to seal the hole in the hole.
[0044] (3) A pneumatic grouting pump for coal mines is used to mix the cement with a water-cement mass ratio of 1.2:0.8, and the cement is uniformly mixed. During the grouting process, the cement is continuously stirred, and the return slurry pipe is observed. When the return slurry pipe appears, the grouting is stopped.
[0045] (4) The setting speed is fast, and the slurry is injected into the drill hole to solidify into a solid body in about 24 hours.
[0046] Of course, the present application can also have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application. However, these corresponding changes and modifications should all belong to the protection scope of the claims attached to the present application.
Claims
1. A directional drilling pressure release device, comprising: The utility model provides a kind of drilling and blasting method, including: Guide rod is inserted in the drill hole drilled by drill bit, the inside of the guide rod is equipped with cloth hole, the front end of the guide rod is equipped with releasable guide head; Cloth piece is slidably connected to the inside of the cloth hole, the inside of the cloth piece is filled with blasting agent, when cloth, the cloth piece drives the blasting agent to be injected to the bottom of guide rod, before the cloth piece slides to the front end of the guide rod, the cloth piece limits the position of blasting agent, when the cloth piece slides to the front end of the guide rod, the cloth piece releases the blasting agent, the guide rod retracts and drives the cloth piece to be extracted from the hole and arranges blasting agent to the inside of drill hole.
2. The directional drilling pressure release device of claim 1, wherein, The front end of the cloth hole is equipped with plugging piece, the plugging piece is rotatably connected to the front end of the guide rod, the plugging piece opens the cloth hole under the abutting action of cloth piece.
3. The directional drilling pressure release device of claim 2, wherein, The plugging piece is equipped with rotating hole, the plugging piece is equipped with plugging disc corresponding to cloth hole, torsion spring is arranged between the plugging piece and the guide rod, the plugging piece is blocked to the bottom of cloth hole under the action of torsion spring.
4. The directional drilling pressure release device of claim 1, wherein, Both sides of the cloth hole are equipped with sliding chute, both sides of the cloth piece are equipped with sliding convex edge, the sliding convex edge is slidably connected to the inside of the sliding chute, the bottom of the cloth piece is equipped with limiting piece for limiting the sliding of the blasting agent, when the sliding convex edge slides to the bottom of the sliding chute, the limiting piece is forced to open to release the blasting agent.
5. The directional drilling pressure release device of claim 4, wherein, The cloth piece and the limiting convex edge are equipped with control channel, the control channel is located in the inside of the sliding convex edge and is equipped with sliding channel, the inside of the sliding channel is slidably equipped with sliding contact, push spring is arranged between the sliding contact and the sliding channel, the sliding contact extends to the outside of the bottom of the sliding convex edge, when the sliding convex edge slides to the bottom of the sliding chute, the sliding contact is forced to slide to the inside of the sliding channel.
6. The directional drilling pressure release device of claim 5, wherein, The bottom of the control channel extends to the outside of the bottom of the cloth piece, the limiting piece is slidably connected to the bottom of the control channel, the inside of the control channel is equipped with hydraulic fluid, the sliding contact slides and drives the limiting piece to slide.
7. The directional drilling pressure release device of claim 6, wherein, The limiting piece includes arc-shaped plate and sliding column arranged on the inside of the arc-shaped plate, and the sliding column is slidably connected to the inside of the control channel.
8. The directional drilling pressure release device of claim 7, wherein, The bottom of the arc-shaped plate is equipped with limiting plate, when the sliding column slides to the inside of the control channel, the limiting plate extends to the inside of the cloth hole, when the sliding column slides outward, the limiting plate slides out of the cloth hole.
9. A directional drilling pressure release process based on the directional drilling pressure release device of any one of claims 1 to 8, characterized in that, The utility model provides a kind of drilling and blasting method, including the following steps: Step one, using drill, air compressor is equipped to provide driving power for pneumatic screw rod drilling tool, adopts while drilling measuring drill rod and directional drill bit to complete directional drilling construction; Step two, openable and closable guide head and guide rod are lowered in directional drilling; Step three, water gel blasting agent is segmented into guide rod, and the end of blasting agent is provided with a suspension device to ensure that the blasting agent remains in the hole; Step four, according to the number of blasting agent, segmented guide rod is withdrawn; Step five, the drill hole is grouted and sealed, and the drilling is completed; Step six, the blast is responded, and the blasting effect is evaluated according to the blasting condition. Step seven, after the evaluation meets the pressure relief strength requirements, start excavation, and use microseismic, stress, and drilling method to conduct secondary test of pressure relief effect during excavation; Step eight, determine the excavation length according to the blasting effect, and then repeat the above process to form a cycle process.