CN109267931B - Device for slitting rock stratum - Google Patents
Device for slitting rock stratum Download PDFInfo
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- CN109267931B CN109267931B CN201811126355.XA CN201811126355A CN109267931B CN 109267931 B CN109267931 B CN 109267931B CN 201811126355 A CN201811126355 A CN 201811126355A CN 109267931 B CN109267931 B CN 109267931B
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- 239000011435 rock Substances 0.000 title claims abstract description 80
- 239000007921 spray Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims description 33
- 238000007599 discharging Methods 0.000 claims description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 13
- 230000005641 tunneling Effects 0.000 description 24
- 238000010276 construction Methods 0.000 description 14
- 238000005755 formation reaction Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B1/00—Percussion drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Abstract
The invention provides a device for slitting a rock stratum, which comprises a cutting device, a propelling mechanism, a mounting bracket and an adjustable supporting device. The cutting device comprises an impact rock breaking drill bit and a spray head capable of forming high-pressure water jet flow, wherein the spray heads are oppositely arranged at two sides of the cutting device, and the impact rock breaking drill bit is oppositely arranged at the outer side of the spray head. And the spray heads are arranged at a certain inclination angle so as to ensure that the width between the kerfs generated by the two side edges of the cutting device is slightly larger than the width of the cutting device. The cutting device is connected with the propelling mechanism, and the cutting device and the propelling mechanism are both arranged on the mounting bracket. The mounting bracket is arranged on an adjustable supporting device, and the adjustable supporting device can adjust the pushing length and the swinging angle of the mounting bracket. The high-pressure water jet cutting technology and the mechanical impact crushing technology can be combined, so that the problems that the high-pressure water jet cutting technology is difficult to cut deep grooves and low in reliability and economy are solved.
Description
Technical Field
The invention belongs to the technical field of tunneling construction, and particularly relates to a device for slitting a rock stratum.
Background
In rock stratum tunneling construction, working condition requirements for separating a tunneling center rock body from surrounding rocks through deep drawing grooves exist, such as coring of a rock sample, blocking blasting impact, controlling section size and the like. At present, the development of a high-pressure water jet cutting technology called a water jet cutter is mature, the kerf is narrow, the depth is shallow, and the shape accuracy is high within a certain depth. However, since the slit width of the high-pressure water jet is far smaller than the radial dimension of the nozzle, the nozzle cannot extend into the slit to an expanded depth, and is difficult to cut deep grooves. If a plurality of groups of spray heads are arranged in a crossing way, the cutting joints are mutually penetrated to cut rocks with a certain width, so that the spray heads can extend into the grooves to continuously expand the depth of the cutting grooves, and in actual construction, the reliability and the energy consumption of a large number of spray heads are difficult to meet the requirements on economy and feasibility, as shown in the attached figure 1.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a device for slitting a rock stratum by combining a high-pressure water jet cutting technology and a mechanical impact crushing technology, and can solve the problems that the high-pressure water jet cutting technology is difficult to cut deep grooves and has low reliability and economy.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
A device for slitting a rock formation includes a cutting device, a propulsion mechanism, a mounting bracket, and an adjustable support device. The cutting device comprises an impact rock breaking drill bit and spray heads capable of forming high-pressure water jet flow, wherein the spray heads are oppositely arranged on two sides of the center of the cutting device, and the impact rock breaking drill bit is oppositely arranged on the outer sides of the spray heads. And the spray heads are arranged at a certain inclination angle so as to ensure that the width between the kerfs generated by the two side edges of the cutting device is slightly larger than the width of the cutting device. The cutting device is connected with the propelling mechanism, and the cutting device and the propelling mechanism are both arranged on the mounting bracket. The mounting bracket is arranged on an adjustable supporting device, and the adjustable supporting device can adjust the pushing length and the swinging angle of the mounting bracket.
According to the device for slitting the rock stratum, the high-pressure water jet is formed by the spray head to cut at least two slits on the profile line of the section of the rock mass, and then the rock ridge between the slits is impacted by the impact rock breaking drill bit to form a wide groove, so that the residual spike-shaped wall surface is not formed. The spray heads are arranged at a certain inclination angle, so that the width between the kerfs generated at the edges of the two sides of the cutting device is slightly larger than the width of the cutting device, the cutting device can go deep into the formed wide groove to continuously work, the cutting device works according to a preset track, finally the deep groove with the preset shape and depth is cut, the disturbance to surrounding rock is small, the tunneling of any shape section can be realized, the narrow kerfs and the small-size rock ridges can be cut by combining high-pressure water jet, the energy utilization rate is high, and the equipment operation reliability and the economical performance can meet the actual construction requirements.
Further improvements to the above described solution are possible as follows.
According to the device for slitting rock formations of the present invention, in a preferred embodiment the cutting device comprises a slag discharging device.
The slag can be discharged out of the construction surface through the slag discharging device, so that the cutting device can continuously and smoothly work to finish slitting.
Specifically, in a preferred embodiment, the slag discharging device comprises a vacuum slag sucking pipe, which is arranged between the spray head and the impact rock breaking drill bit. The slag is discharged in a vacuum slag suction pipe mode, the structure is simple, the cost is low, the slag discharge effect is good, and the environment is protected.
Further, in a preferred embodiment, auxiliary spray heads are provided in a spaced arrangement between the spray heads.
Through setting up a plurality of auxiliary spray heads can cut more kerfs in order to promote the broken of rock ridge, improve the work efficiency of slitting.
Further, in a preferred embodiment, the jet formed by the jet of the nozzle forms an angle of 10-20 degrees with the edge of the cutting device. The arrangement mode enables the spray directions of the spray heads at two sides of the cutting device to slightly exceed the outer edge of the cutting device, and the edge of the cutting groove can be slightly wider than the width of the cutting device, so that the cutting device can penetrate into the groove to continuously cut.
Further, in a preferred embodiment, the cutting device is provided with several sets of spare nozzles, the nozzles and the spare nozzles being interconnected by a switching valve.
Because the wear of the spray head is faster, when the working spray head cannot effectively cut due to pressure reduction caused by wear, the standby spray head can be started to continue working through the switching pipeline. The worn spray heads are replaced in a concentrated mode during overhauling, so that the slitting construction efficiency can be effectively improved.
Further, in a preferred embodiment, the percussive rock drill bit is arranged at a determined inclination with respect to the groove wall.
The impact rock-breaking drill bit is arranged at a determined inclination relative to the wall of the groove, so that impact crushing machines such as a rock drill and the like do not interfere with the wall of the tunnel correspondingly, and a drill rod connected with the drill bit does not interfere with the wall of the groove, thereby ensuring that the radial position outward displacement distance of the drill bit caused by the outward expansion angle of the impact crushing machines such as the rock drill and the like is contained, eliminating steps between two tunneling and reducing undermining.
Specifically, in a preferred embodiment, the mounting bracket is constructed as a hollow cylindrical frame structure, and the cutting devices are uniformly arranged at the outer circumference of the cylindrical frame.
When the circular deep groove tunneling machine is used for circular deep groove tunneling, the mounting bracket is made into a cylinder shape, and is supported, positioned and driven to rotate outside a construction surface. In order to improve the construction speed, a plurality of groups of cutting devices can be uniformly distributed in the circumferential direction, and under the condition that the number of groups is m, the cylindrical frame can be rotated for 1/m of a circle to push one layer.
Further, in a preferred embodiment, a stop device is provided on the mounting bracket at a tail portion remote from the cutting device.
When the horizontal tunneling is carried out, the gravity influence easily causes deflection in the depth direction, so that the problem can be solved by adopting a mode that the tail part of the bracket is provided with a counterweight and other limiting devices.
Further, in a preferred embodiment, the device for slitting rock formations further comprises an extension bracket connected to the mounting bracket.
When tunneling vertically downwards, the tunneling can be kept deep by connecting the extension bracket on the mounting bracket.
Compared with the prior art, the invention has the advantages that: the high-pressure water jet cutting technology and the mechanical impact crushing technology can be combined, so that the problems that the high-pressure water jet cutting technology is difficult to cut deep grooves and low in reliability and economy are solved.
Drawings
The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings. Wherein:
FIG. 1 schematically illustrates a multi-set spray head crossover arrangement;
FIG. 2 schematically illustrates a bottom view of a cutting device according to an embodiment of the present invention;
FIG. 3 schematically illustrates a front view of an embodiment of the present invention;
FIG. 4 schematically illustrates a standby nozzle arrangement according to an embodiment of the present invention;
FIG. 5 schematically shows the overall structure of an apparatus for rock formation cutting according to an embodiment of the present invention;
Fig. 6 schematically shows the operation of the cutting device according to an embodiment of the invention;
FIG. 7 schematically illustrates an arrangement of a percussive rock drill bit according to an embodiment of the present invention;
FIG. 8 schematically illustrates one of the slag discharging modes according to the embodiment of the present invention;
FIG. 9 schematically illustrates another deslagging mode of an embodiment of the invention;
FIG. 10 schematically illustrates one configuration of a mounting bracket according to an embodiment of the present invention;
fig. 11 schematically shows an embodiment of the invention in an operating state of the device for slitting rock strata in a vertically downward tunneling.
In the drawings, like parts are designated with like reference numerals. The figures are not drawn to scale.
Detailed Description
The invention will now be described in further detail with reference to the drawings and the specific examples, which are not intended to limit the scope of the invention.
Fig. 2 schematically shows a bottom view of the cutting device 1 according to an embodiment of the invention. Fig. 3 schematically shows a front view of a cutting device 1 according to an embodiment of the present invention. Fig. 4 schematically shows a standby nozzle arrangement state according to an embodiment of the present invention. Fig. 5 schematically shows the overall structure of an apparatus 10 for slitting rock formations according to an embodiment of the invention. Fig. 6 schematically shows the operation of the cutting device 1 according to an embodiment of the invention. Fig. 7 schematically shows an arrangement of a percussive rock drill bit according to an embodiment of the present invention. Fig. 8 schematically shows one of the slag discharging modes according to the embodiment of the present invention. Fig. 9 schematically shows another deslagging mode according to an embodiment of the invention. Fig. 10 schematically illustrates one configuration of a mounting bracket according to an embodiment of the present invention. Fig. 11 schematically shows the working state of the device 10 for slitting rock strata according to an embodiment of the invention in a vertically downward tunneling.
As shown in fig. 2, 3 and 5, the apparatus 10 for slitting rock strata according to an embodiment of the present invention comprises a cutting apparatus 1, a propulsion mechanism 2, a mounting bracket 3 and an adjustable support apparatus 4. Wherein the cutting device 1 comprises an impact rock-breaking drill bit 11 and spray heads 12 capable of forming high-pressure water jet flows, the spray heads 12 are oppositely arranged at two sides of the cutting device 1, and the impact rock-breaking drill bit 11 is oppositely arranged at the outer sides of the spray heads 12. And the spray heads 12 are arranged at a determined inclination so as to ensure that the width between the slits produced by the two side edges of the cutting device 1 is slightly greater than the width of the cutting device 1. The cutting device 1 is connected to the propulsion mechanism 2, and both the cutting device 1 and the propulsion mechanism 2 are arranged on the mounting bracket 3. The mounting bracket 3 is arranged on an adjustable support device 4, and the adjustable support device 4 can adjust the pushing length and the swinging angle of the mounting bracket 3. According to the device for slitting the rock stratum, provided by the embodiment of the invention, the high-pressure water jet is formed by the spray nozzle to cut at least two slits on the profile line of the section of the rock mass, and then the rock ridge between the slits is impacted by the impact rock breaking bit to form a wide groove, so that the residual spike-shaped wall surface is not formed. The spray heads are arranged at a certain inclination angle, so that the width between the kerfs generated at the edges of the two sides of the cutting device is slightly larger than the width of the cutting device, the cutting device can go deep into the formed wide groove to continuously work, the cutting device works according to a preset track, finally the deep groove with the preset shape and depth is cut, the disturbance to surrounding rock is small, the tunneling of any shape section can be realized, the narrow kerfs and the small-size rock ridges can be cut by combining high-pressure water jet, the energy utilization rate is high, and the equipment operation reliability and the economical performance can meet the actual construction requirements. Preferably, the jet head 12 operates with a post-mix abrasive water jet.
Further, as shown in fig. 3, in a preferred embodiment, the jet formed by the jet head 12 forms an angle α of 10 to 20 degrees, more preferably 13 to 15 degrees, with the edge of the cutting device. The spray direction of the spray heads at two sides of the cutting device slightly exceeds the outer edge of the cutting device, so that the edge of the cutting groove is slightly wider than the width of the cutting device, and the cutting device stretches into the groove to cut continuously.
As shown in fig. 2, the device 10 for slitting rock formations according to an embodiment of the invention, in a preferred embodiment, the cutting device 1 comprises a slag discharging device 13. The slag can be discharged out of the construction surface through the slag discharging device, so that the cutting device can continuously and smoothly work to finish slitting. Specifically, in a preferred embodiment, the slag discharging device 13 includes a vacuum slag sucking pipe 131, which is disposed between the spray head and the impact rock breaking bit. The slag is discharged in a vacuum slag suction pipe mode, the structure is simple, the cost is low, the slag discharge effect is good, and the environment is protected.
Preferably, the slag discharging device 13 is changed according to different tunnel construction modes, as shown in fig. 8, when the horizontal tunneling is performed, the deep hole 101 can be drilled horizontally at the bottom of the section by using a rock drilling rod according to the preset cutting depth in advance when the section is circular, a screw conveyor which can be inserted into and reach the bottom of the deep hole 101 is arranged, and the auxiliary fluid flushes the slag during deep cutting to the deep hole at the bottom of the groove along the circular track, so that the rapid slag removal is realized by adopting the screw conveying mode. As shown in fig. 9, when the cross section is arched, two deep holes 101 can be drilled at two bottom corners of the arched cross section, two screw conveyors are arranged, auxiliary fluid is used for flushing the slag to the two bottom corners, and then screw conveying is used for discharging the slag. When the vertical tunneling is performed, the broken large rock ridges can be crushed into small slag by utilizing the secondary crushing effect of the rock drill bit, and the slag is timely discharged in a vacuum suction mode.
Further, as shown in fig. 2 and 3, in a preferred embodiment, there are spaced apart auxiliary spray heads 14 between spray heads 12. Can cut more kerfs through setting up a plurality of auxiliary sprinkler and can promote the broken of rock ridge, improve the work efficiency of slitting. The auxiliary spray heads 14 can be arranged in a staggered manner along the direction of the slitting track, the spraying direction of the auxiliary spray heads 14 points to the depth direction of the grooving, and the angle between the spraying directions of the two auxiliary spray heads 14 is not more than plus or minus 10 degrees.
Specifically, as shown in FIG. 2, in a preferred embodiment, the pre-cut width is set to 1.2 to 1.6 times the diameter of the percussive rock drill bit. The auxiliary spray heads 14 are uniformly arranged for more than 2 along the width direction of the groove, and the distance between the cutting slits generated by the two auxiliary spray heads 14 is not more than 0.8 times of the diameter of the impact rock breaking drill bit. The auxiliary spray heads 14 can be arranged in a staggered manner along the direction of the slitting track. When the slitting trajectory is a closed curve and the cutting device 1 can be continuously advanced in the slitting trajectory direction, only the impact rock-breaking bit 11 and the vacuum slag-sucking pipe at the rear side in the advancing direction of the head 12 are activated. When the slitting track is a non-closed curve or the track is a closed curve but the cutting device 1 cannot continuously advance along the track direction, the cutting device 1 needs to adopt a reciprocating motion mode along the track, before changing the motion direction, the impact rock breaking drill bit and the vacuum slag suction pipe at the other side need to be started, and after reversing, the cutting device 1 passes through the unbroken rock ridge section in a slow-speed and strong-impact state. When the cutting track is a closed curve, in order to avoid the adoption of a rotary joint and the reduction of the reliability of the propelling mechanism, the cutting devices can also adopt a reciprocating rotary motion mode, and when the cutting devices are reversed, the impact drill bit 11 and the vacuum slag suction pipe 131 behind each group of the cutting devices 1 are started.
Preferably, as shown in fig. 6, the groups of the spray heads 12 and the auxiliary spray heads 14 move at a constant speed v1, the impact rock breaking drill 11 and the vacuum slag suction pipe 131 do not translate in a stepping manner, that is, the impact rock breaking drill is pulled up to the spray head groups at a speed v2 after impact, and the relationship between the impact time t1 of the impact rock breaking drill, the drilling time t2 and the moving time t3 of the impact rock breaking drill, the translation speed v1 of the spray heads 12 and the auxiliary spray heads 14 and the translation speed v2 of the impact rock breaking drill should satisfy v1×1+t2+t3) =v2×t3.ltoreq.1.4d. For the target rock, the depth of the kerf generated when the jet 11 and the auxiliary jet 14 move at the speed v1 is equal to or greater than the depth of the impact in the time of striking the rock breaking bit t 1. As shown in fig. 5 and 6, the cutting device 1 is mounted on a mounting bracket 3 and is advanced along the mounting bracket 3 by a propulsion mechanism 2, the mounting bracket 3 being of a length matching a preset undercut depth. The adjustable supporting device 4 at the bottom of the mounting bracket 3 is constructed into a telescopic swing arm structure, the length and the swing angle of the swing arm can be changed to realize a preset slitting track, and the cutting device 1 is advanced into the cutting device after removing one layer of rock until reaching a preset depth.
Further, in a preferred embodiment, as shown in fig. 4, the cutting device 1 arranges several sets of backup heads 15 side by side along the slitting trajectory, the arrangement positions and angles of the heads 12 and the backup heads 15 of the same set are identical in projection in the slitting width direction, the heads 12 and the backup heads 15 are connected to each other by a switching valve 16, and the heads 12 and the backup heads 15 are arranged on a mounting seat 17. Because abrasive water jet nozzle wears fast, when the work shower nozzle can't effectively cut because of wearing and tearing cause pressure decline, can start reserve shower nozzle through the switching pipeline and continue work. The worn spray heads are replaced in a concentrated mode during overhauling, so that the slitting construction efficiency can be effectively improved.
Further, as shown in fig. 7, in a preferred embodiment, the percussive rock drill bit 11 is disposed at a defined inclination with respect to the wall of the slot. Preferably, the slope is preferably 3% to 5%. For the case where the length of the in-flight length of the impact breaking bit 11 is large, a down-the-hole drill is preferable, and the distance of the shower head 12 is adjusted according to the size of the impact breaking bit 11. The impact rock-breaking drill bit is arranged at a determined inclination relative to the wall of the groove, so that impact crushing machines such as a rock drill and the like do not interfere with the wall of the tunnel correspondingly, and a drill rod connected with the drill bit does not interfere with the wall of the groove, thereby ensuring that the radial position outward displacement distance of the drill bit caused by the outward expansion angle of the impact crushing machines such as the rock drill and the like is contained, eliminating steps between two tunneling and reducing undermining.
Specifically, in a preferred embodiment, as shown in fig. 10, the mounting bracket 3 is constructed in a hollow cylindrical frame 31 structure, and the cutting devices 1 are uniformly arranged at the outer circumference of the cylindrical frame 31. When the circular deep groove tunneling machine is used for tunneling, the mounting bracket is made into a cylinder shape, is supported, positioned and driven to rotate outside a construction surface, and also adopts a layer-by-layer progressive extending mode. In order to improve the construction speed, a plurality of groups of cutting devices can be uniformly distributed in the circumferential direction, and under the condition that the number of groups is m, the cylindrical frame can be rotated for 1/m of a circle to push one layer. In order to prevent broken stone from entering the mounting bracket 3 to damage the pipeline and the cutting device 1, a closed protective cover is added on the inner cylindrical surface and the outer cylindrical surface of the mounting bracket 3. Further, the cylindrical frame 31 includes support rings 311 arranged at intervals in the axial direction, the cutting device 1 is located at one end of the cylindrical frame 31, the other end of the cylindrical frame 31 is provided with a driving flange 312, and the driving flange 312 is provided with a pipe connection hole 313.
Further, in a preferred embodiment, a stop means is provided on the mounting bracket 3 at a tail portion remote from the cutting device 1. When the horizontal tunneling is carried out, the gravity influence easily causes deflection in the depth direction, so that the problem can be solved by adopting a mode that the tail part of the bracket is provided with a counterweight and other limiting devices. Meanwhile, the central cantilever core is deformed, easy to squeeze and clamp, and the mounting bracket 3 moves, so that the circulating footage is controlled, and the core is taken out in time, so that the tunneling is continued.
Further, as shown in fig. 11, in a preferred embodiment, the device for slitting rock strata further comprises an extension bracket 5, the extension bracket 5 being connected to the mounting bracket 3. When tunneling vertically downwards, the tunneling can be kept deep by connecting the extension bracket on the mounting bracket. Preferably, the propulsion mechanism comprises a drive ring 7, a pinch roller 8, a slewing drive 9 and a lifting drive 102. Specifically, the mounting bracket 3 or the extension bracket 5 is fixed on the driving ring 7 through the connecting flange 6, the pushing force is transmitted to the driving ring 7 by the pressing roller 8 and then transmitted to the mounting bracket 3 or the extension bracket 5, and the slewing drive 9 is transmitted to the driving ring 7 through the gear-gear ring and then transmitted to the mounting bracket 3 or the extension bracket 5. The high-pressure water pipe, the abrasive delivery pipe, the impact driving power pipeline (hydraulic pressure, compressed air, power line), the vacuum suction pipe and the like are converged into a tube bundle, and are led out from the cutting device 1 to ground equipment for connection. When the tunneling depth exceeds 20m, the impact drilling tool adopts a down-the-hole mode. In another preferred embodiment, when tunneling vertically upwards, the central suspended core is extremely easy to fracture and fall, so that a protection device is also arranged to prevent safety accidents caused by fracture and fall of the core.
According to the embodiment, the device for cutting the rock stratum can combine the high-pressure water jet cutting technology and the mechanical impact crushing technology, so that the problems that deep grooves are difficult to cut and the reliability and economy are low in the high-pressure water jet cutting technology are solved.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed herein, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. A device for slitting a rock formation, comprising a cutting device, a propulsion mechanism, a mounting bracket and an adjustable support device; wherein,
The cutting device comprises an impact rock breaking drill bit and spray heads capable of forming high-pressure water jet flow, the spray heads are oppositely arranged on two sides of the center of the cutting device, and the impact rock breaking drill bit is oppositely arranged on the outer side of the spray heads; the spray heads are arranged at a certain inclination angle so as to ensure that the width between the kerfs generated by the edges of the two sides of the cutting device is slightly larger than the width of the cutting device;
The cutting device is connected with the propelling mechanism, and the cutting device and the propelling mechanism are both arranged on the mounting bracket;
the mounting bracket is arranged on the adjustable supporting device, and the adjustable supporting device can adjust the pushing length and the swinging angle of the mounting bracket;
A plurality of auxiliary spray heads are arranged between the spray heads at intervals, the auxiliary spray heads are arranged in a staggered manner along the direction of a cutting track, the spraying direction of the auxiliary spray heads points to the depth direction of the cutting groove, the cutting device also comprises a slag discharging device, the slag discharging device comprises a vacuum slag sucking pipe, the vacuum slag sucking pipe is arranged between the spray heads and the impact rock breaking drill bit,
Wherein the jet head and the auxiliary jet head move at a constant speed v1, the impact rock breaking drill bit and the vacuum slag suction pipe move in a stepping mode, namely do not translate during impact, the impact rock breaking drill bit is pulled to be close to the jet head at a translation speed v2 after impact,
The relations among the impact time t1, the drill lifting time t2, the moving time t3, the translation speed v1 of the spray head and the auxiliary spray head and the translation speed v2 of the impact rock breaking drill bit should satisfy the following formula: v1 (t1+t2+t3) =v2×t3.ltoreq.1.4d, where d is the diameter of the impact rock drill bit,
And the depth of the kerf generated when the spray head and the auxiliary spray head move at the speed v1 is more than or equal to the depth of the impact rock breaking drill bit in the time t 1.
2. A device for slitting a rock formation according to claim 1, wherein the jet formed by the jet jets makes an angle of 10-20 degrees with the edge of the cutting device.
3. A device for slitting a rock formation according to claim 1 or 2, wherein the cutting device is provided with several sets of spare jets, the jets and the spare jets being interconnected by a switching valve.
4. A device for rock formation cutting according to claim 1 or 2, wherein the percussive rock drill bit is arranged at a determined inclination with respect to the slot wall.
5. A device for rock strata slitting as claimed in claim 1 or claim 2 wherein the mounting bracket is configured as a hollow cylindrical frame structure and the cutting means is evenly arranged around the periphery of the cylindrical frame.
6. A device for slitting a rock strata as claimed in claim 1 or claim 2 wherein a stop means is provided on the mounting bracket at a rear portion remote from the cutting means.
7. A device for slitting a rock strata as claimed in claim 1 or claim 2 further comprising an elongate bracket connected to the mounting bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811126355.XA CN109267931B (en) | 2018-09-26 | 2018-09-26 | Device for slitting rock stratum |
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|---|---|---|---|
| CN201811126355.XA CN109267931B (en) | 2018-09-26 | 2018-09-26 | Device for slitting rock stratum |
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| CN109267931A CN109267931A (en) | 2019-01-25 |
| CN109267931B true CN109267931B (en) | 2024-06-04 |
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| CN110107223A (en) * | 2019-05-20 | 2019-08-09 | 中国铁建重工集团股份有限公司 | Drilling device |
| CN114151078B (en) * | 2021-12-02 | 2024-04-19 | 中国铁建重工集团股份有限公司 | Water jet gangue layer slitting device |
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