CN111578799A

CN111578799A - Continuous blasting drilling method

Info

Publication number: CN111578799A
Application number: CN202010460694.2A
Authority: CN
Inventors: 李天北; 康俊芬; 李波
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-08-25

Abstract

The present invention provides a continuous blasting drilling method, comprising the steps of, S1, simultaneously injecting mud to the front end and the rear end of a detonation section in the rock drilling direction by a continuous blasting device to form a front mud column and a rear mud column, respectively; s2, simultaneously injecting sand to the front end of the front mud column in the rock drilling direction and the rear end of the rear mud column in the rock drilling direction by a continuous blasting device to respectively form a front sand section and a rear sand section; s3, injecting blasting powder between the front mud column and the rear mud column through a continuous blasting device; and S4, igniting the blasting charge through a continuous blasting device, and blasting. The liquid explosive is filled for blasting, the blasting direction of the explosive can be controlled, the blasting effect is good, blasting and rock drilling can be simultaneously carried out, the explosive can be continuously filled without taking out a drill bit, and the drilling efficiency is high.

Description

Continuous blasting drilling method

Technical Field

The invention relates to a rock drilling method, in particular to a continuous blasting drilling method.

Background

At present, in the construction operation of tunnel engineering such as railways, highways, subways, drilling mountains and the like, two tunneling modes of artificial blasting type excavation and automatic rotary cutting type construction are commonly used. In the manual blasting mode, the excavated rock is drilled, filled with solid explosive for blasting, and then slag is removed and the next construction is carried out; and the automatic rotary drilling adopts a chipping type arched cutter, and the physical cutting is carried out through the rotation of the chipping type arched cutter. Both of the above two methods are inefficient in construction. The former is blasting but only manual excavation; the latter is automated but uses physical cutting, the effect of which is not comparable to blasting.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a continuous blasting drilling method, liquid explosives are filled for blasting, the blasting direction of the explosives can be controlled, the blasting effect is good, blasting and rock drilling can be simultaneously carried out, the explosives can be continuously filled without taking out a drill bit, and the drilling efficiency is high.

In order to solve the above technical problems, the continuous blasting drilling method of the present invention includes the steps of:

s1, a front mud column and a rear mud column are formed by simultaneously injecting mud to the front end and the rear end of the initiation section in the rock drilling direction by the continuous blasting device.

S2, a front sand section and a rear sand section are formed by simultaneously injecting sand to a front end of the front mud column in the rock drilling direction and a rear end of the rear mud column in the rock drilling direction by a continuous blasting device.

And S3, injecting blasting powder between the front mud column and the rear mud column through a continuous blasting device.

And S4, igniting the blasting powder through the continuous blasting device, supporting and maintaining the ballast formed after the blasting powder is detonated, and discharging the ballast and simultaneously implementing the next drilling blasting to perform continuous blasting.

The continuous blasting device comprises a flow guide pipe body, an anti-explosion barrel body is coaxially sleeved outside the flow guide pipe body, and a plurality of anti-explosion mesh holes are formed in the anti-explosion barrel body.

A gap is reserved between the diversion pipe body and the anti-explosion barrel body.

The flow guide pipe body relatively rotates or moves back and forth in the anti-explosion cylinder body.

And the outer side wall of the rear end of the flow guide pipe body in the rock drilling direction is provided with a medicine injection hole.

And a medicine injection channel is formed in the flow guide pipe body along the length direction.

The medicine injection channel is communicated with the medicine injection hole.

And a front liquid sealing ring is fixed on the outer wall of the front end of the flow guide pipe body along the rock drilling direction.

And a rear liquid sealing ring is arranged on the inner wall of the rear end of the explosion-proof cylinder body along the rock drilling direction.

And a front mud injection hole is formed in the inner side wall of the front end of the explosion-proof cylinder body in the rock drilling direction.

And a front mud injection channel is formed in the explosion-proof bobbin body along the length direction.

The front mud injection channel is communicated with the front mud injection hole.

And the inner side wall of the front end of the explosion-proof cylinder body in the rock drilling direction is provided with a front sand injection hole.

And a front sand injection channel is arranged in the explosion-proof bobbin body along the length direction.

The front sand injection channel is communicated with the front sand injection hole.

The front sand injection hole is located at the front end of the front mud injection hole in the rock drilling direction.

And a front plugging ring is fixed on the outer wall of the front end of the explosion-proof tube body along the rock drilling direction.

The front plugging ring is located at the front end of the front liquid sealing ring in the rock drilling direction.

And a rear mud injection hole is formed in the outer side wall of the rear end of the flow guide pipe body in the rock drilling direction.

And a rear mud injection channel is formed in the flow guide pipe body along the length direction.

And the rear mud injection channel is communicated with the rear mud injection hole.

And a rear sand injection hole is formed in the outer side wall of the rear end of the flow guide pipe body in the rock drilling direction.

And a rear sand injection channel is formed in the flow guide pipe body along the length direction.

The back sand injection channel is communicated with the back sand injection hole.

The rear sand injection hole is located at the rear end of the rear mud injection hole in the rock drilling direction.

The drug injection hole is located at the front end of the rear mud injection hole in the rock drilling direction.

The rear sand injection hole is located at the front end of the rear liquid seal ring in the rock drilling direction.

And a rear plugging ring is fixed on the outer wall of the rear end of the explosion-proof cylinder body along the rock drilling direction.

The rear packing ring is located at the rear end of the rear packing ring in the rock drilling direction.

And the outer side wall of the middle part of the flow guide pipe body in the rock drilling direction is provided with an ignition hole.

An ignition channel is formed in the flow guide pipe body along the length direction.

An ignition wire is arranged in the ignition channel.

The ignition wire is communicated with the ignition hole.

The ignition channel is connected with a detonating device at the rear end in the rock drilling direction.

In S1, the step of forming the front and rear mud columns includes:

s11, pushing the guide pipe forward in the rock drilling direction until the front liquid-sealing ring is located at the front end of the front sand injection hole.

And S12, injecting mud into the front mud injection channel and the rear mud injection channel respectively, rotating the diversion pipe body simultaneously, enabling mud to flow out of the front mud injection hole and the rear mud injection hole respectively, and forming a front mud column and a rear mud column between the diversion pipe body and the anti-explosion pipe body respectively.

In S2, the step of forming the front sand section and the rear sand section includes:

s21, pushing the guide pipe forward in the rock drilling direction until the front liquid-sealing ring is located at the front end of the front sand injection hole.

And S22, respectively injecting sand into the front sand injection passage and the rear sand injection passage, simultaneously rotating the flow guide tube body, respectively injecting sand from the front sand injection hole and the rear sand injection hole, and respectively forming a front sand section and a rear sand section between the flow guide tube body and the explosion-proof tube body and at the front end of the front mud column in the rock drilling direction and at the rear end of the rear mud column in the rock drilling direction.

In S3, the step of injecting the blasting agent includes:

s31, pushing the guide pipe forward in the rock drilling direction until the front liquid-sealing ring is located at the front end of the front sand injection hole.

And S32, blasting powder is injected into the powder injection channel, and the liquid medicine flows out of the powder injection hole to fill the gap between the front mud column and the rear mud column.

In S4, the igniting step includes:

s41, pulling the guide tube backwards in the rock drilling direction until the front liquid sealing ring is located at the rear end of the front mud injection hole.

And S42, starting the initiating device, and igniting the blasting charge through an ignition wire.

Drawings

The continuous blasting drilling method according to the present invention will be described in further detail with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural view of the explosive-filling state of the continuous blasting device in the continuous blasting drilling method of the present invention.

Fig. 2 is a structural diagram of a continuous blasting device in a state after the continuous blasting device is filled with explosive according to the continuous blasting drilling method of the present invention.

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 1 according to the present invention.

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 1 according to the present invention.

Fig. 5 is a schematic diagram of the distribution structure of the outer side wall of the explosion-proof mesh hole of the continuous blasting device of the continuous blasting drilling method of the present invention.

Fig. 6 is a schematic diagram of the distribution structure of the inner side wall of the explosion-proof mesh hole of the continuous blasting device of the continuous blasting drilling method of the present invention.

Fig. 7 is a schematic structural view of an impact end face of a pneumatic-hydraulic percussion drill bit of the continuous blasting apparatus of the continuous blasting drilling method of the present invention.

Fig. 8 is a schematic side view of a pneumatic percussion drill bit of the continuous blasting apparatus of the continuous blasting drilling method according to the present invention.

Fig. 9 is a schematic structural view of a pneumatic and hydraulic combination percussion bit of the continuous blasting apparatus of the continuous blasting drilling method of the present invention.

In the figure: 1-a drill bit body; 101-impact teeth; 102-primary side impact teeth; 103-secondary side impact teeth; 104-an intake passage; 105-a slag discharge groove; 11-a secondary drill bit; 111-secondary intake passage; 112-auxiliary slag discharge groove; 2-a flow guide pipe body; 201-medicine injection hole; 202-injecting mud holes behind the draft tube; 203-sand injection holes behind the flow guide pipe; 204-liquid sealing ring in front of the draft tube; 211-ignition hole; 3-explosion-proof cylinder body; 301-explosion-proof mesh holes; 302-explosion-proof cylinder back liquid sealing ring; 303-a mud injection hole in front of the explosion-proof cylinder; 304-sand injection holes in front of the explosion-proof cylinder; 305-explosion-proof cylinder front plugging ring; 306-explosion-proof cylinder rear plugging ring; 307-collar.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

One embodiment of the present invention is shown in fig. 1 to 6, and the present embodiment provides a continuous blasting drilling method and a continuous blasting drilling apparatus thereof, the continuous blasting drilling method including the steps of:

In S1, the step of forming the front and rear mud columns includes:

s11, pushing the guide pipe forward along the rock drilling direction until the front liquid sealing ring 204 of the guide pipe is located at the front end of the sand injection hole 304 in front of the explosion-proof cylinder.

And S12, respectively injecting mud into the front mud injection channel and the rear mud injection channel, simultaneously rotating the diversion pipe body 2, and respectively allowing mud to flow out of the front mud injection hole 303 of the explosion-proof cylinder and the rear mud injection hole 202 of the diversion pipe, so that a front mud column and a rear mud column are respectively formed between the diversion pipe body 2 and the explosion-proof cylinder body 3.

s21, pushing the guide pipe forward along the rock drilling direction until the front liquid sealing ring 204 of the guide pipe is located at the front end of the sand injection hole 304 in front of the explosion-proof cylinder.

S22, sand is injected into the front sand injection passage and the rear sand injection passage, respectively, while rotating the draft tube body 2, sand flows out from the front sand injection hole 304 of the explosion-proof cylinder and the rear sand injection hole 203 of the draft tube, respectively, and a front sand section and a rear sand section are formed between the draft tube body 2 and the explosion-proof cylinder body 3, at a front end of the front mud column in the rock drilling direction and at a rear end of the rear mud column in the rock drilling direction, respectively.

In S3, the step of injecting the blasting agent includes:

s31, pushing the guide pipe forward along the rock drilling direction until the front liquid sealing ring 204 of the guide pipe is located at the front end of the sand injection hole 304 in front of the explosion-proof cylinder.

In S4, the igniting step includes:

and S41, pulling the guide pipe backwards along the rock drilling direction until the front liquid sealing ring 204 of the guide pipe is positioned at the rear end of the front mud injection hole 303 of the explosion-proof cylinder.

The rear end of a drill bit body 1 of the continuous blasting rock drilling device is connected with a guide pipe body 2, an anti-explosion tube body 3 is coaxially sleeved outside the guide pipe body 2, and a plurality of anti-explosion mesh holes 301 are formed in the anti-explosion tube body 3.

A gap is reserved between the diversion pipe body 2 and the anti-explosion barrel body 3.

The diversion pipe body 2 relatively rotates or moves back and forth in the anti-explosion pipe body 3.

The rear outer side wall of the guide pipe body 2 in the rock drilling direction is provided with a guide pipe drug injection hole 201.

And a medicine injection channel is formed in the flow guide pipe body 2 along the length direction.

The medicine injection channel is communicated with the medicine injection hole 201 of the guide pipe.

A guide pipe front liquid sealing ring 204 is fixed on the outer wall of the front part of the guide pipe body 2 along the rock drilling direction.

The inner wall of the explosion-proof cylinder body 3 at the rear part along the rock drilling direction is provided with an explosion-proof cylinder rear liquid sealing ring 302.

The aperture of each explosion-proof mesh hole 301 is gradually reduced from the inner side wall of the explosion-proof cylinder body 3 to the outer side wall of the explosion-proof cylinder body 3.

The explosion-proof mesh hole 301 is approximately spherical.

The front inner side wall of the explosion-proof cylinder body 3 in the rock drilling direction is provided with an explosion-proof cylinder front mud injection hole 303.

And a front mud injection channel is arranged in the explosion-proof cylinder body 3 along the length direction.

The front mud injection channel is communicated with the front mud injection hole 303 of the explosion-proof cylinder.

The front inner side wall of the explosion-proof cylinder body 3 along the rock drilling direction is provided with an explosion-proof cylinder front sand injection hole 304.

And a front sand injection channel is arranged in the explosion-proof cylinder body 3 along the length direction.

The front sand injection channel is communicated with the front sand injection hole 304 of the explosion-proof cylinder.

The explosion-proof cylinder front sand injection hole 304 is located at the front end of the explosion-proof cylinder front mud injection hole 303 in the rock drilling direction.

An explosion proof cylinder front blocking ring 305 is fixed to the outer wall of the front part of the explosion proof cylinder body 3 in the rock drilling direction.

The explosion proof cylinder front blocking ring 305 is located at the front end of the guide pipe front liquid sealing ring 204 in the rock drilling direction.

The guide pipe body 2 is provided with a guide pipe rear mud injection hole 202 along the outer side wall of the rear part of the rock drilling direction.

And a rear mud injection channel is formed in the diversion pipe body 2 along the length direction.

The rear mud injection passage is communicated with the rear mud injection hole 202 of the draft tube.

The guide pipe body 2 is provided with a guide pipe rear sand injection hole 203 along the outer side wall of the rear part of the rock drilling direction.

And a back sand injection channel is formed in the flow guide pipe body 2 along the length direction.

The rear sand injection passage is communicated with the rear sand injection hole 203 of the draft tube.

The draft tube rear sand injection hole 203 is located at the rear end of the draft tube rear mud injection hole 202 in the rock drilling direction.

The injection hole 201 is located at the front end of the mud injection hole 202 behind the draft tube in the rock drilling direction.

The draft tube rear sand injection hole 203 is located at the front end of the explosion-proof cylinder rear liquid seal ring 302 in the rock drilling direction.

The sand injection channel is internally provided with a pipeline with an eyelet to prevent the sand injection channel from being blocked.

A one-way valve is arranged at the sand outlet of the sand injection channel; the sand inlet is designed as a normally open opposite-insertion type conveying passage.

An explosion-proof cylinder rear plugging ring 306 is fixed to the outer wall of the explosion-proof cylinder body 3 at the rear part in the rock drilling direction.

The rear explosion proof cartridge blocking ring 306 is located at the rear end of the rear explosion proof cartridge liquid sealing ring 302 in the rock drilling direction.

The explosion-proof cylinder rear liquid sealing ring 302 comprises fan-shaped blades and a connecting part.

The connecting part is sleeved outside the flow guide pipe body 2.

The connecting part rotates relatively in the explosion-proof cylinder body 3.

There are at most three post-seal rings.

The fan-shaped blades of the liquid sealing ring 302 behind each explosion-proof cylinder are mutually abutted.

The sum of the sectional areas of the fan-shaped blades is larger than the sectional area of a gap between the explosion-proof cylinder body 3 and the guide pipe body 2.

The angle of each fan-shaped blade is between 120 and 360 degrees.

A collar 307 is fixed to the inner wall of the explosion-proof cylinder body 3 at the rear in the rock drilling direction.

The collar 307 has two.

Both end surfaces of the plurality of explosion-proof cylinder rear liquid-sealing rings 302 abut against the inner sides of the two collars 307.

The liquid sealing ring 204 in front of the flow guide pipe is in interference fit with the anti-explosion barrel body 3.

The guide pipe body 2 is provided with an ignition hole 211 along the middle outer side wall of the rock drilling direction.

An ignition channel is formed in the diversion pipe body 2 along the length direction.

An ignition wire is arranged in the ignition channel.

The ignition wire communicates with the ignition hole 211.

The ignition wire is connected with a detonating device at the rear part along the rock drilling direction.

The explosion-proof tube body 3 can support and maintain the ballast formed after the explosive is detonated. A certain space is formed between the inside of the explosion-proof cylinder body 3 and the outside of the flow guide pipe body 2, and the impact drill bit can continue to drill and smoothly discharge slag under the condition that the ballast is not completely cleaned. After ignition, the explosive blasts to impact rocks and stratums through the explosion-proof mesh holes 301, and slag chips are discharged through a gap between the explosion-proof cylinder body 3 and the diversion pipe body 2.

The explosion-proof cylinder body 3 is provided with an independent rotary flow guide and telescopic system, and the stroke of the system is positioned between the outside of the flow guide pipe body 2 and the inner wall of the drill hole. The materials of the explosion-proof cylinder body 3 need to resist the explosion impact and the pressure from the ballast. The front end of the explosion-proof tube body 3 along the rock drilling direction is provided with a wear-resistant centralizing sleeve, and the front end of the sleeve is provided with an opening communicated with a slag discharge channel. The rear end of the explosion-proof cylinder body 3 in the rock drilling direction is provided with a rotation and propulsion device.

And a guide device is arranged between the impactor and the anti-explosion tube body 3. The guiding device is a short section which has a certain angle with the explosion-proof cylinder body 3. During drilling, the drill bit does not rotate, and the guiding device slightly rotates left and right during orientation, so that the aim of directional advancing is fulfilled.

Another embodiment of the present invention, as shown in fig. 7 to 8, provides a pneumatic and hydraulic percussion drill bit of a continuous blasting rock drilling apparatus, including a bit body 1, the impact end of the bit body 1 being embedded with a plurality of impact teeth 101.

Each of the impact teeth 101 extends beyond the end surface of the impact end.

The impact teeth 101 are made of hard alloy metal.

The drill bit body 1 is made of soft metal.

A plurality of air inlet channels 104 are arranged inside the drill bit body 1.

The outlet of each of the intake passages 104 extends to the end face of the impingement end.

The circumferential side wall of the impact end is provided with a plurality of slag discharge grooves 105.

The outlet of each slag discharge groove 105 extends to the end face of the impact end.

The impact teeth 101 are in the shape of a bar.

A plurality of main side impact teeth 102 are embedded in the impact end of the drill bit body 1.

The primary side impact teeth 102 are distributed on both sides of the outlet of each slag discharge groove 105.

Each of the primary side impact teeth 102 extends beyond the end face of the impact end.

The primary side impact teeth 102 are of a hard alloy metal.

The primary side impact teeth 102 are in the form of bars.

A plurality of secondary side impact teeth 103 are embedded at the impact end of the drill bit body 1.

The secondary side impact teeth 103 are distributed between every two slag discharge grooves 105.

Each of the secondary side impact teeth 103 extends beyond the end face of the impact end.

The secondary side impact teeth 103 are made of hard alloy metal.

The secondary side impact teeth 103 are in the shape of a cylindrical bar.

A plurality of cavities are arranged inside the drill bit body 1.

The driving end of the drill bit body 1 is installed on the impactor, the impactor and the plurality of air inlet channels 104 form a closed loop, when hydraulic oil is used as a power medium of the impactor, air or water and slurry are required to be additionally added to serve as a chip carrying medium, slag chips are discharged through the slag discharging groove 105, when the water or slurry is used as the power medium of the impactor, other loops do not need to be added, and the water or slurry after doing work can directly carry out the rock chips.

Another embodiment of the present invention is shown in fig. 9, which provides a pneumatic-hydraulic combination percussion drill bit of a continuous blasting rock drilling apparatus, which includes a bit body 1 and a sub-bit 11.

The driving end of the drill bit body 1 and the driving end of the auxiliary drill bit 11 are sleeved on the support.

The cross section of the drill bit body 1 is cylindrical.

The impact end of the drill bit body 1 is embedded with a plurality of impact teeth 101.

Each of the impact teeth 101 extends beyond the end surface of the impact end of the bit body 1.

The impact teeth 101 are made of hard alloy metal.

The drill bit body 1 is made of soft metal.

The impact end of the sub-drill 11 exceeds the end surface of the impact end of the drill body 1.

The secondary drill 11 is made of hard alloy metal.

A plurality of air inlet channels 104 are arranged inside the drill bit body 1.

The outlet of each air inlet passage 104 extends to the end face of the impact end of the bit body 1.

Each of the air intake passages 104 extends to the end face of the driving end of the bit body 1 after the driving ends of the bits meet.

A plurality of sub air intake passages 111 are provided inside the body of the sub bit 11.

The outlet of each of the secondary air intake passages 111 extends to the end surface of the striking end of the secondary drill bit 11.

Each of the sub air intake passages 111 extends to the end face of the driving end of the sub bit 11 after the driving ends of the sub bits 11 are merged.

The circumferential side wall of the drill bit is provided with a plurality of slag discharge grooves 105.

Each of the slag discharge grooves 105 extends from the end face of the drive end of the drill bit to the end face of the impact end of the drill bit.

The side wall of the auxiliary drill bit 11 is provided with a plurality of convex blocks.

The bumps are arranged in rows and columns.

Gaps are reserved between the bumps in each row.

Gaps are reserved among the convex blocks in each column.

The gap between each of the lugs forms a secondary slag chute 112.

The center of the bracket is provided with a through hole.

The through hole is circular.

The bracket is provided with a plurality of sub through holes around the through hole.

The drill bit moves back and forth or rotates relatively in the through hole.

The sub-drill 11 is provided in plurality.

Each of the sub bits 11 moves back and forth in each of the sub through holes, respectively.

The impact teeth 101 are in the shape of a bar.

And a plurality of cutting teeth are embedded at the impact end of the drill bit body 1.

The cutting teeth are distributed on two sides of the outlet of each slag discharge groove 105.

Each of the cutting teeth extends beyond the end face of the impact end.

The cutting teeth are made of hard alloy metal.

The cutting teeth are in a columnar strip shape.

The secondary side impact teeth 103 are made of hard alloy metal.

The secondary side impact teeth 103 are in the shape of a cylindrical bar.

A plurality of cavities are arranged inside the drill bit body 1.

The drill bit body 1 with the drive end of vice drill bit 11 is installed on the impacter, and the impacter forms closed circuit with a plurality of inlet channel 104 and vice inlet channel 111, when adopting hydraulic oil as the power medium of impacter, then need add gas in addition or water, mud and do and carry the bits medium, the cinder passes through arrange the cinder groove 105 with vice cinder groove 112 discharges, when adopting water or mud as the power medium of impacter, then need not add other return circuits, water or mud after doing work can directly take the detritus out.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous blast drilling method, comprising the steps of:

s1, simultaneously injecting mud to the front end and the rear end of the detonation section along the rock drilling direction through a continuous blasting device to respectively form a front mud column and a rear mud column;

s2, simultaneously injecting sand to the front end of the front mud column in the rock drilling direction and the rear end of the rear mud column in the rock drilling direction by a continuous blasting device to respectively form a front sand section and a rear sand section;

s3, injecting blasting powder between the front mud column and the rear mud column through a continuous blasting device;

2. The continuous blasting drilling method according to claim 1,

the continuous blasting device comprises a flow guide pipe body, an explosion-proof cylinder body is coaxially sleeved outside the flow guide pipe body, and a plurality of explosion-proof mesh holes are formed in the explosion-proof cylinder body;

a gap is reserved between the flow guide pipe body and the anti-explosion barrel body;

the flow guide pipe body relatively rotates or moves back and forth in the anti-explosion cylinder body;

the outer side wall of the rear end of the flow guide pipe body along the rock drilling direction is provided with a medicine injection hole;

a medicine injection channel is formed in the length direction in the flow guide pipe body;

the medicine injection channel is communicated with the medicine injection hole;

a front liquid sealing ring is fixed on the outer wall of the front end of the flow guide pipe body along the rock drilling direction;

the inner wall of the rear end of the explosion-proof cylinder body along the rock drilling direction is provided with a rear liquid sealing ring;

the inner side wall of the front end of the explosion-proof cylinder body along the rock drilling direction is provided with a front mud injection hole;

a front mud injection channel is formed in the explosion-proof bobbin body along the length direction;

the front mud injection channel is communicated with the front mud injection hole;

the inner side wall of the front end of the explosion-proof cylinder body along the rock drilling direction is provided with a front sand injection hole;

a front sand injection channel is arranged in the explosion-proof bobbin body along the length direction;

the front sand injection channel is communicated with the front sand injection hole;

the front sand injection hole is positioned at the front end of the front mud injection hole along the rock drilling direction;

a front plugging ring is fixed on the outer wall of the front end of the explosion-proof cylinder body along the rock drilling direction;

the front plugging ring is positioned at the front end of the front liquid sealing ring along the rock drilling direction;

the outer side wall of the rear end of the guide pipe body along the rock drilling direction is provided with a rear mud injection hole;

a rear mud injection channel is formed in the length direction in the flow guide pipe body;

the rear mud injection channel is communicated with the rear mud injection hole;

the outer side wall of the rear end of the flow guide pipe body along the rock drilling direction is provided with a rear sand injection hole;

a rear sand injection channel is formed in the length direction in the flow guide pipe body;

the rear sand injection channel is communicated with the rear sand injection hole;

the rear sand injection hole is positioned at the rear end of the rear mud injection hole in the rock drilling direction;

the drug injection hole is positioned at the front end of the rear mud injection hole along the rock drilling direction;

the rear sand injection hole is positioned at the front end of the rear liquid sealing ring along the rock drilling direction;

a rear plugging ring is fixed on the outer wall of the rear end of the explosion-proof cylinder body along the rock drilling direction;

the rear plugging ring is positioned at the rear end of the rear liquid sealing ring along the rock drilling direction;

an ignition hole is formed in the outer side wall of the middle part of the flow guide pipe body along the rock drilling direction;

an ignition channel is formed in the length direction in the flow guide pipe body;

an ignition wire is arranged in the ignition channel;

the ignition wire is communicated with the ignition hole;

3. The continuous blast drilling method of claim 2, wherein the step of forming the front and rear mud columns at S1 comprises:

s11, pushing the guide pipe forwards along the rock drilling direction until the front liquid sealing ring is positioned at the front end of the front sand injection hole;

4. The continuous blast drilling method of claim 2, wherein the step of forming the front sand section and the rear sand section in S2 comprises:

s21, pushing the guide pipe forwards along the rock drilling direction until the front liquid sealing ring is positioned at the front end of the front sand injection hole;

5. The continuous blast drilling method of claim 2, wherein the step of injecting blasting agent in S3 comprises:

s31, pushing the guide pipe forwards along the rock drilling direction until the front liquid sealing ring is positioned at the front end of the front sand injection hole;

6. The continuous blast drilling method of claim 2, wherein in S4, said firing step comprises:

s41, pulling the guide pipe backwards along the rock drilling direction until the front liquid sealing ring is positioned at the rear end of the front mud injection hole;