CN111779479A

CN111779479A - Ultrahigh-pressure water cutting type tunneling machine and cutting method

Info

Publication number: CN111779479A
Application number: CN202010780773.1A
Authority: CN
Inventors: 王世斌; 赵友军; 周恒博; 黄�俊; 张站民; 刘宁
Original assignee: Xian Coal Mining Machinery Co Ltd
Current assignee: Xian Coal Mining Machinery Co Ltd
Priority date: 2020-08-06
Filing date: 2020-08-06
Publication date: 2020-10-16

Abstract

The invention discloses an ultrahigh pressure water cutting type tunneling machine and a cutting method, wherein the tunneling machine comprises a machine body, a cutting part, a walking part, a shovel part, an ultrahigh pressure water supply mechanism arranged on the machine body and gem nozzle parts arranged on the cutting part, the number of the gem nozzle parts is four, the first gem nozzle part comprises a first gem seat and a first gem nozzle, the second gem nozzle part comprises a second gem seat and a second gem nozzle, the third gem nozzle part comprises a third gem seat and a third gem nozzle, and the fourth gem nozzle part comprises a fourth gem seat and a fourth gem nozzle; the cutting method comprises the following steps: firstly, acquiring a coal seam Poulper hardness coefficient; secondly, setting parameters of a nozzle; and thirdly, cutting the coal bed. The cutting device realizes cutting of the coal bed through ultrahigh pressure water, has high cutting speed and good safety, avoids abrasion of cutting teeth, and prolongs the service life of the cutting teeth.

Description

Ultrahigh-pressure water cutting type tunneling machine and cutting method

Technical Field

The invention belongs to the technical field of coal mine excavation equipment, and particularly relates to an ultrahigh pressure water cutting type heading machine and a cutting method.

Background

At present, coal still occupies an important proportion in the energy structure of China, the demand of the development of national economy on coal is still very large, but the existing coal roadway heading machine still has the following problems when cutting a coal seam: firstly, when the coal roadway heading machine cuts a coal body through a cutting tooth on a cutting head, the cutting tooth is seriously worn, so that the service life of the cutting tooth is short; secondly, when cutting picks on a cutting head of the coal roadway heading machine cut gangue, sparks are generated, if the concentration of positive gas is high, gas explosion is easy to cause, and the safety is poor; thirdly, dust is large when a cutting head of the coal roadway heading machine cuts, water mist particles sprayed by the existing spraying dust-settling method are fine and dense, the dust-settling effect is good, however, the water mist cannot be eliminated in time due to small wind flow speed of the return wind of the roadway, so that the water mist on the working face covers the working face, the sight and operation of a heading driver are influenced, and potential safety hazards are generated; fourthly, when the coal quality is hard or the quantity of the sandwiched gangue is too much, the tunneling speed of the coal roadway tunneling machine is low, and mining disorder is caused.

Therefore, an ultrahigh pressure water cutting type tunneling machine and a cutting method which are simple in structure and reasonable in design are absent at present, and the problems that cutting teeth of the tunneling machine are seriously worn, the service life of the cutting teeth is short, the safety of the cutting process is poor and the tunneling speed is low when an existing coal seam is cut are solved.

Disclosure of Invention

The invention aims to solve the technical problem of providing an ultrahigh pressure water cutting type tunneling machine aiming at the defects in the prior art, which has the advantages of simple structure, reasonable design, high cutting speed and good safety, realizes the cutting of a coal bed by ultrahigh pressure water, avoids the abrasion of cutting teeth and prolongs the service life of the cutting teeth.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides an ultrahigh pressure water cutting type entry driving machine which characterized in that: comprises a machine body, a cutting part, a walking part, a shovel plate part, an ultrahigh pressure water supply mechanism arranged on the machine body and a gem nozzle part arranged on the cutting part;

the cutting part comprises a telescopic arm connected with the machine body and a conical cutting head which is arranged at the end part of the telescopic arm and is far away from the machine body, and a plurality of cutting teeth are arranged on the conical cutting head;

the ultrahigh-pressure water supply mechanism comprises a water tank, a precision filter and an ultrahigh-pressure water pump which are arranged on the machine body, and the water tank, the precision filter and the ultrahigh-pressure water pump are communicated in sequence;

the number of the gem nozzle components is four, the four gem nozzle components are respectively a first gem nozzle component, a second gem nozzle component, a third gem nozzle component and a fourth gem nozzle component, the first gem nozzle component comprises a first gem seat and a first gem nozzle communicated with the first gem seat, the second gem nozzle component comprises a second gem seat and a second gem nozzle communicated with the second gem seat, the third gem nozzle component comprises a third gem seat and a third gem nozzle communicated with the third gem seat, the fourth gem nozzle component comprises a fourth gem seat and a fourth gem nozzle communicated with the fourth gem seat, and the first gem seat, the second gem seat, the third gem seat and the fourth gem seat are all positioned on the conical cutting head;

the water outlet of the ultrahigh-pressure water pump is communicated with the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle through conveying pipes, and the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle are uniformly distributed along the length direction of the conical cutting head.

The ultrahigh pressure water cutting type tunneling machine is characterized in that: the conveying pipe comprises a first water conveying hose, a first water conveying hard pipe, a second water conveying hose, a second water conveying hard pipe and a third water conveying hard pipe which are sequentially communicated, and a first water dividing pipe and a second water dividing pipe which are communicated with the third water conveying hard pipe through a first tee joint;

the end part, far away from the first water delivery hard pipe, of the first water delivery hose is communicated with a water outlet of the ultrahigh pressure water pump, the second water delivery hard pipe is communicated with a third water delivery hard pipe through a rotary joint, the fixed end of the rotary joint is connected with the outlet end of the second water delivery hard pipe, and the rotary end of the rotary joint is connected with the inlet end of the third water delivery hard pipe;

the utility model discloses a water pipe, including first tee bend joint, second tee bend joint, first tee bend joint's first port and third water delivery hard tube, the second port of first tee bend joint is connected with the entry end of first water distribution pipe, the third port of first tee bend joint is connected with the entry end of second water distribution pipe, the exit end of first water distribution pipe is connected with the second tee bend joint, just the exit end of first water distribution pipe and the first port intercommunication of second tee bend joint, the exit end of second water distribution pipe is connected with the third tee bend joint, just the exit end of second water distribution pipe and the first port intercommunication of third tee bend.

The ultrahigh pressure water cutting type tunneling machine is characterized in that: a second port of the second three-way joint is connected with a third water distributing pipe, and the end part of the third water distributing pipe, which is far away from the second three-way joint, is communicated with the first jewel nozzle through a first jewel seat;

a third port of the second three-way joint is connected with a fourth water distribution pipe, and the end part of the fourth water distribution pipe, which is far away from the second three-way joint, is communicated with a second jewel nozzle through a second jewel seat;

a second port of the third three-way joint is connected with a fifth water dividing pipe, and the end part, far away from the third three-way joint, of the fifth water dividing pipe is communicated with a third gem nozzle through a third gem seat;

and a third port of the third three-way joint is connected with a sixth water distribution pipe, and the end part of the sixth water distribution pipe, which is far away from the third three-way joint, is communicated with a fourth jewel nozzle through a fourth jewel seat.

The ultrahigh pressure water cutting type tunneling machine is characterized in that: the first jewel nozzle is detachably connected with the first jewel seat, the second jewel nozzle is detachably connected with the second jewel seat, the third jewel nozzle is detachably connected with the third jewel seat, and the fourth jewel nozzle is detachably connected with the fourth jewel seat;

the structure of the first jewel nozzle, the structure of the second jewel nozzle, the structure of the third jewel nozzle and the structure of the fourth jewel nozzle are the same, the first jewel nozzle, the second jewel nozzle, the structure of the third jewel nozzle and the structure of the fourth jewel nozzle all comprise a nozzle body, a conical channel arranged in the nozzle body and a straight channel which is arranged in the nozzle body and communicated with the conical channel, the angle of the conical channel is 13 degrees, and the length of the straight channel is 2-4 times of the diameter of the straight channel.

The ultrahigh pressure water cutting type tunneling machine is characterized in that: the distance between the first jewel nozzle and the second jewel nozzle along the length direction of the conical cutting head is 200mm, the distance between the second jewel nozzle and the third jewel nozzle along the length direction of the conical cutting head is 200mm, the distance between the third jewel nozzle and the fourth jewel nozzle along the length direction of the conical cutting head is 200mm, a gap is formed between the first jewel nozzle and the rear end of the conical cutting head, and a gap is formed between the fourth jewel nozzle and the front end of the conical cutting head;

the first jewel seat, the second jewel seat, the third jewel seat and the fourth jewel seat are all located in the gap of the two adjacent cutting teeth.

The ultrahigh pressure water cutting type tunneling machine is characterized in that: the included angle between the projection of the axis of the first gem nozzle on the horizontal plane where the axis of the conical cutting head is located and the axis of the conical cutting head is 15-30 degrees;

the projection of the axis of the second gem nozzle on the horizontal plane where the axis of the conical cutting head is located and the included angle between the axis of the conical cutting head are 15-30 degrees;

the projection of the axis of the third gem nozzle on the horizontal plane where the axis of the conical cutting head is located and the included angle between the axis of the conical cutting head are 15-30 degrees;

the projection of the axis of the fourth jewel nozzle on the horizontal plane where the axis of the conical cutting head is located and the included angle between the axis of the conical cutting head are 15-30 degrees;

the horizontal plane of the axis of the conical cutting head is vertical to the rear end face of the conical cutting head.

The ultrahigh pressure water cutting type tunneling machine is characterized in that: the diameters of the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle are all 0.5-0.6 mm.

Meanwhile, the invention also provides an ultrahigh pressure water cutting type coal seam cutting method which is simple in method steps and reasonable in design, and is characterized by comprising the following steps:

step one, acquiring a coal seam Poulper hardness coefficient:

step 101, detecting the compressive strength of a coal seam to be cut:

selecting a plurality of cylindrical test pieces on a coal seam to be cut, obtaining the unidirectional ultimate compressive strength of the plurality of cylindrical test pieces by using a compression testing machine, and carrying out mean value processing on the unidirectional ultimate compressive strength of the plurality of cylindrical test pieces to obtain the mean value R of the unidirectional ultimate compressive strength of the cylindrical test pieces;

102, calculating the Python hardness coefficient of the coal seam to be cut:

according to the formula

Obtaining the Pythiier hardness coefficient f of the coal seam to be cut;

step two, setting parameters of the nozzle:

step 201, when the coefficient f of the Pythiier hardness of a coal seam to be cut is [ 3-5 ], setting the jet pressure of a first jewel nozzle, a second jewel nozzle, a third jewel nozzle and a fourth jewel nozzle to be 140MPa, and setting the jet flow of the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle to be 7.5L/min;

when the coefficient f of the Pythiier hardness of the coal seam to be cut is [ 5-10 ], setting the jet pressure of the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle to be 280MPa, and setting the jet flow of the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle to be 7.5L/min;

step 202, when the coefficient f of the Pythiier hardness of the coal seam to be cut is (3-5), selecting the diameters of a first jewel nozzle, a second jewel nozzle, a third jewel nozzle and a fourth jewel nozzle to be 0.6 mm;

when the coefficient f of the Pythiier hardness of the coal seam to be cut is [ 5-10 ], selecting the diameters of a first jewel nozzle, a second jewel nozzle, a third jewel nozzle and a fourth jewel nozzle to be 0.5 mm;

step three, cutting the coal seam:

the method comprises the following steps of dividing a coal mine roadway into a plurality of roadway tunneling sections from back to front along the length direction of the coal mine roadway, wherein the tunneling method of each roadway tunneling section is the same, and the tunneling process of any roadway tunneling section is as follows:

301, dividing any roadway driving section into a plurality of areas to be cut from bottom to top in sequence along the height direction of the coal mine roadway;

step 302, sequentially dividing a plurality of areas to be cut into a 1 st area to be cut, a 2 nd area to be cut and an nth area to be cut along the height direction of a coal mine roadway; wherein n is a positive integer, the value of n is 3-5, and the heights of n to-be-cut areas are the same;

303, enabling the tunneling machine to be close to an area to be cut through the walking part, and then operating the shovel plate part to descend to the bottom of the area to be cut; wherein the bottom of the shovel plate part is positioned at the bottom of a coal mine roadway which is formed by tunneling;

step 304, operating the telescopic arm to enable the conical cutting head to be close to one end of the 1 st area to be cut; the front end face of the conical cutting head is attached to the surface of the coal bed at one end of the 1 st area to be cut;

305, operating a precision filter and an ultrahigh pressure water pump to work, wherein water in a water tank enters the ultrahigh pressure water pump through the precision filter, and the ultrahigh pressure water pump supplies ultrahigh pressure water to a first jewel nozzle, a second jewel nozzle, a third jewel nozzle and a fourth jewel nozzle through a conveying pipe;

step 306, operating the telescopic arm to extend until the length of the conical cutting head extending into the 1 st area to be cut meets 600-700 mm; when the conical cutting head extends into the 1 st area to be cut, ultrahigh pressure water in the first jewel nozzle, ultrahigh pressure water in the second jewel nozzle, ultrahigh pressure water in the third jewel nozzle and ultrahigh pressure water in the fourth jewel nozzle are all sprayed to the 1 st area to be cut, so that the coal bed in the 1 st area to be cut is cut;

307, operating the telescopic arm to move towards the other end of the 1 st to-be-cut area along the width direction of the coal mine roadway, and continuously cutting the coal seam of the 1 st to-be-cut area by using ultrahigh pressure water in the first jewel nozzle, ultrahigh pressure water in the second jewel nozzle, ultrahigh pressure water in the third jewel nozzle and ultrahigh pressure water in the fourth jewel nozzle in the process that the telescopic arm moves along the width direction of the coal mine roadway until the coal seam of the 1 st to-be-cut area is cut;

308, operating the telescopic arm to enable the conical cutting head to be close to the other end of the 2 nd area to be cut; the front end face of the conical cutting head is attached to the surface of the coal bed at the other end of the 2 nd area to be cut;

309, repeating the step 306 and the step 307, and operating the telescopic arm to move to one end of the 2 nd area to be cut along the width direction of the coal mine roadway to finish cutting of the coal seam of the 2 nd area to be cut;

3010, repeating steps 306 to 309 for multiple times, and completing cutting of the coal seam of the nth area to be cut;

and 3011, operating the walking part to enable the tunneling machine to move to be close to the tunneling section of the next roadway along the length direction of the coal mine roadway to cut the coal seam.

The above method is characterized in that: in step 305, the ultrahigh pressure water pump provides ultrahigh pressure water for the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle through the delivery pipe, and the specific process is as follows:

3051, conveying the ultrahigh-pressure water at the water outlet of the ultrahigh-pressure water pump to a third water conveying hard pipe through a first water conveying hose, a first water conveying hard pipe, a second water conveying hose and a second water conveying hard pipe in sequence;

3052, distributing the ultrahigh-pressure water in the third water conveying hydraulic pipe to the first water distribution pipe and the second water distribution pipe through the first three-way joint;

3053, distributing the ultrahigh pressure water in the first water distributing pipe to a third water distributing pipe and a fourth water distributing pipe through a second tee joint, conveying the ultrahigh pressure water in the third water distributing pipe to the first jewel nozzle through the first jewel seat, conveying the ultrahigh pressure water in the fourth water distributing pipe to the second jewel nozzle through the second jewel seat,

and meanwhile, ultrahigh pressure water in the second water distribution pipe is distributed to a fifth water distribution pipe and a sixth water distribution pipe through a third tee joint, the ultrahigh pressure water in the fifth water distribution pipe is conveyed to a third jewel nozzle through a third jewel seat, and the ultrahigh pressure water in the sixth water distribution pipe is conveyed to a fourth jewel nozzle through a fourth jewel seat.

The above method is characterized in that: in step 306, the ultrahigh pressure water in the first jewel nozzle, the ultrahigh pressure water in the second jewel nozzle, the ultrahigh pressure water in the third jewel nozzle and the ultrahigh pressure water in the fourth jewel nozzle are all sprayed to the 1 st area to be cut, so that the coal seam of the 1 st area to be cut is cut, and the specific process is as follows:

step 3061, rotating the conical cutting head to drive a first jewel nozzle, a second jewel nozzle, a third jewel nozzle and a fourth jewel nozzle on the conical cutting head to rotate, and spraying ultrahigh pressure water in the first jewel nozzle, ultrahigh pressure water in the second jewel nozzle, ultrahigh pressure water in the third jewel nozzle and ultrahigh pressure water in the fourth jewel nozzle to the 1 st region to be cut to respectively form a first annular slot, a second annular slot, a third annular slot and a fourth annular slot; the depth of each of the first annular slit, the second annular slit, the third annular slit and the fourth annular slit is 150-200 mm, the central lines of the first annular slit, the second annular slit, the third annular slit and the fourth annular slit are parallel to the length direction of a coal mine roadway, the radius of the circle where the first annular slit, the second annular slit, the third annular slit and the fourth annular slit are located is reduced in sequence, and coal blocks between two adjacent slits fall onto the shovel plate part when the first annular slit, the second annular slit, the third annular slit and the fourth annular slit are formed;

step 3062: the telescopic arm is operated to move towards the other end of the 1 st zone to be cut along the width direction of the coal mine roadway, ultrahigh pressure water in the first jewel nozzle, ultrahigh pressure water in the second jewel nozzle, ultrahigh pressure water in the third jewel nozzle and ultrahigh pressure water in the fourth jewel nozzle are all sprayed to the 1 st zone to be cut to respectively form a next first annular slot, a next second annular slot, a next third annular slot and a next fourth annular slot, and coal blocks between two adjacent slots fall onto the shovel plate part when the next first annular slot, the next second annular slot, the next third annular slot and the next fourth annular slot are formed;

step 3063: and 3062, repeating the step 3062 for multiple times until cutting of the coal seam of the 1 st area to be cut is completed.

Compared with the prior art, the invention has the following advantages:

1. the coal cutting machine is simple in structure, reasonable in design, convenient to implement, convenient to install and detach, high in tunneling speed and capable of cutting the coal bed through the ultrahigh-pressure water jet, cutting of the coal bed by using a cutting tooth on a cutting head of the tunneling machine is avoided, stress of the cutting tooth is reduced, and the service life of the cutting tooth is prolonged.

2. According to the invention, the coal bed is cut by adopting ultrahigh pressure water, so that dust generated when the coal bed is cut by using the cutting pick is effectively reduced, the air of the coal face is kept fresh, and the normal work of workers is not influenced; meanwhile, the coal seam cut by using the ultrahigh pressure water can inhibit sparks possibly generated during coal seam cutting, reduce gas emission of the coal seam and enhance safety of coal seam cutting.

3. The coal seam to be cut is completely collapsed under the cutting action of the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle; secondly, in order to meet the requirement of coal seam cutting, waste of water resources and ultrahigh pressure water energy caused by the arrangement of a plurality of jewel nozzles is avoided.

4. According to the invention, the precision filter is adopted to filter water flowing out of the water outlet of the water tank, the filtered water is conveyed to the ultrahigh pressure water pump, the ultrahigh pressure water pump converts the filtered water into ultrahigh pressure water, and the ultrahigh pressure water pump conveys the ultrahigh pressure water to the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle through the conveying pipe, so that the blockage of the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle caused by the fact that impurities in the water tank are conveyed to the first jewel nozzle, the second jewel nozzle, the third jewel nozzle and the fourth jewel nozzle along with water flow is avoided, and the reliable work of the ultrahigh pressure water cutting type tunneling machine is ensured.

5. The cutting method of the ultrahigh pressure water cutting type tunneling machine is simple in steps and reasonable in design, firstly the coefficient of the Pythriter hardness of the coal seam is obtained, secondly, nozzle parameters are set according to the coefficient of the Pythriter hardness of the coal seam to be cut, and finally, the ultrahigh pressure water cutting type tunneling machine is used for cutting the coal seam until the tunneling of a coal mine tunnel is completed, the cutting speed is high, and the service life of cutting teeth is prolonged.

In conclusion, the cutting device is novel and reasonable in design, the coal bed is cut by ultrahigh-pressure water, the cutting speed is high, the safety is good, the abrasion of cutting teeth is avoided, the service life of the cutting teeth is prolonged, and the cutting device is convenient to popularize and use.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a schematic structural diagram of the ultrahigh pressure water cutting type tunneling machine of the invention.

Fig. 2 is a schematic structural view of the delivery pipe of the present invention.

FIG. 3 is a flow chart of the ultrahigh pressure water-cutting type cutting method of the present invention.

Fig. 4 is a schematic structural diagram of a first jewel nozzle, a second jewel nozzle, a third jewel nozzle and a fourth jewel nozzle according to the present invention.

Description of reference numerals:

1-a fuselage; 2, a cutting part; 3-a traveling part;

4-shovel portion; 5, a telescopic arm; 6-a conical cutting head;

7-a water tank; 8, a precision filter; 9-ultrahigh pressure water pump;

10-a first gemstone seat; 11-a first jewel nozzle; 12-a second gemstone seat;

13-a second jewel nozzle; 14-third precious stone base; 15-third gem nozzle;

16-a fourth stone mount; 17-a fourth jewel nozzle; 18-a cutting pick;

19-a first water hose; 20-a first water conveying hard pipe; 21-a second water hose;

22-a second water conveying hard pipe; 23-a third water conveying hard pipe; 24-a first tee;

25-a first water diversion pipe; 26-a second water distribution pipe; 27 — a second three-way joint;

28-a third tee fitting; 29-third water diversion pipe; 30-a fourth water dividing pipe;

31-a fifth water dividing pipe; 32-a sixth distributive pipe; 33-a rotary joint;

34-a tapered channel; 35-a direct current channel; 36 — a first reference pick;

37-a second reference pick; 38-a third reference pick; 39 — a fourth reference pick;

40-nozzle body.

Detailed Description

As shown in fig. 1 and fig. 2, the ultra-high pressure water cutting type tunneling machine according to the present invention comprises a machine body 1, a cutting part 2, a walking part 3, a shovel plate part 4, an ultra-high pressure water supply mechanism arranged on the machine body 1, and a gem nozzle part arranged on the cutting part 2;

the cutting part 2 comprises a telescopic arm 5 connected with the machine body 1 and a conical cutting head 6 which is arranged at the end part of the telescopic arm 5 and is far away from the machine body 1, and a plurality of cutting teeth 18 are arranged on the conical cutting head 6;

the ultrahigh-pressure water supply mechanism comprises a water tank 7, a precision filter 8 and an ultrahigh-pressure water pump 9 which are arranged on the machine body 1, and the water tank 7, the precision filter 8 and the ultrahigh-pressure water pump 9 are communicated in sequence;

the number of the gem nozzle components is four, the four gem nozzle components are respectively a first gem nozzle component, a second gem nozzle component, a third gem nozzle component and a fourth gem nozzle component, the first gem nozzle component comprises a first gem seat 10 and a first gem nozzle 11 communicated with the first gem seat 10, the second gem nozzle component comprises a second gem seat 12 and a second gem nozzle 13 communicated with the second gem seat 12, the third gem nozzle component comprises a third gem seat 14 and a third gem nozzle 15 communicated with the third gem seat 14, the fourth gem nozzle component comprises a fourth gem seat 16 and a fourth gem nozzle 17 communicated with the fourth gem seat 16, and the first gem seat 10, the second gem seat 12, the third gem seat 14 and the fourth gem seat 16 are all positioned on the conical cutting head 6;

the water outlet of the ultrahigh-pressure water pump 9 is communicated with a first jewel nozzle 11, a second jewel nozzle 13, a third jewel nozzle 15 and a fourth jewel nozzle 17 through conveying pipes, and the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 are uniformly distributed along the length direction of the conical cutting head 6.

In this embodiment, during actual installation, the length direction of the tapered cutting head 6 is parallel to the axis of the tapered cutting head 6.

In this embodiment, in actual use, the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17 are all conical convergent nozzles.

In this embodiment, the precision filter 8 has a filtering precision of 10 μm; the water tank 7, the precision filter 8 and the ultrahigh pressure water pump 9 are communicated in sequence, and the purpose of arranging the precision filter 8 is as follows: the water flowing out of the water outlet of the water tank 7 is filtered, the filtered water is conveyed to the ultrahigh-pressure water pump 9, the ultrahigh-pressure water pump 9 converts the filtered water into ultrahigh-pressure water, and the converted ultrahigh-pressure water is conveyed to the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 through the conveying pipe, so that the situation that impurities in the water tank 7 are conveyed to the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 along with the ultrahigh-pressure water to cause blockage of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is avoided, and the reliable work of the ultrahigh-pressure water cutting type tunneling machine is guaranteed.

In this embodiment, the model of the ultrahigh pressure water pump 9 is Tj9018 to 30/140, and the ultrahigh pressure water pump 9 is provided for the purpose of: the water conveyed to the ultrahigh pressure water pump 9 from the water tank 7 through the precision filter 8 is converted into ultrahigh pressure water, the ultrahigh pressure water is conveyed to the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 or the fourth jewel nozzle 17 from a water outlet of the ultrahigh pressure water pump 9 through a conveying pipe, and the ultrahigh pressure water is provided for the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17.

As shown in fig. 2, in this embodiment, the delivery pipe includes a first water delivery hose 19, a first water delivery hard pipe 20, a second water delivery hose 21, a second water delivery hard pipe 22 and a third water delivery hard pipe 23 which are sequentially communicated, and a first water diversion pipe 25 and a second water diversion pipe 26 which are communicated with the third water delivery hard pipe 23 through a first three-way joint 24;

the end part, far away from the first water delivery hard pipe 20, of the first water delivery hose 19 is communicated with a water outlet of the ultrahigh pressure water pump 9, the second water delivery hard pipe 22 is communicated with a third water delivery hard pipe 23 through a rotary joint 33, the fixed end of the rotary joint 33 is connected with the outlet end of the second water delivery hard pipe 22, and the rotary end of the rotary joint 33 is connected with the inlet end of the third water delivery hard pipe 23;

the first port of first three way connection 24 is connected with the exit end of third water delivery hard tube 23, the second port of first three way connection 24 is connected with the entry end of first tee bend 25, the third port of first three way connection 24 is connected with the entry end of second tee bend 26, the exit end of first tee bend 25 is connected with second three way connection 27, just the exit end of first tee bend 25 and the first port intercommunication of second three way connection 27, the exit end of second tee bend 26 is connected with third three way connection 28, just the exit end of second tee bend 26 and the first port intercommunication of third three way connection 28.

In this embodiment, in actual use, the first water delivery hose 19 and the second water delivery hose 21 are both ultrahigh pressure hoses, the inner diameters of the first water delivery hose 19 and the second water delivery hose 21 are both 10mm, and the outer diameters of the first water delivery hose 19 and the second water delivery hose 21 are both 21.6 mm.

In this embodiment, during practical use, the first water delivery hard tube 20, the second water delivery hard tube 22 and the third water delivery hard tube 23 are all seamless stainless steel hard tubes, the inner diameters of the first water delivery hard tube 20, the second water delivery hard tube 22 and the third water delivery hard tube 23 are all 11.1mm, and the outer diameters of the first water delivery hard tube 20, the second water delivery hard tube 22 and the third water delivery hard tube 23 are all 19.1 mm.

In this embodiment, the connection ends of the first water delivery hose 19 and the first water delivery hard pipe 20, the first water delivery hard pipe 20 and the second water delivery hose 21, and the second water delivery hose 21 and the second water delivery hard pipe 22 are all communicated through pipe joints.

In the present embodiment, the rotary joint 33 is provided for the purpose of: when the heading machine works, the conical cutting head 6 rotates to drive the first jewel seat 10, the second jewel seat 12, the third jewel seat 14 and the fourth jewel seat 16 on the conical cutting head 6 to rotate, the first jewel seat 10 rotates to drive the third water distribution pipe 29 to rotate, the second jewel seat 12 rotates to drive the fourth water distribution pipe 30 to rotate, and the third water distribution pipe 29 and the fourth water distribution pipe 30 rotate to drive the second tee joint 27 and the first water distribution pipe 25 to rotate; the third gem seat 14 rotates to drive the fifth water dividing pipe 31 to rotate, the fourth gem seat 16 rotates to drive the sixth water dividing pipe 32 to rotate, and the fifth water dividing pipe 31 and the sixth water dividing pipe 32 rotate to drive the third three-way joint 28 and the second water dividing pipe 26 to rotate; the first water dividing pipe 25 and the second water dividing pipe 26 rotate to drive the first three-way joint 24 and the third water conveying hard pipe 23 to rotate, the inlet end of the third water conveying hard pipe 23 is connected with the rotating end of the rotating joint 33, the fixed end of the rotating joint 33 is connected with the second water conveying hard pipe 22, the second water conveying hard pipe 22 is prevented from being influenced by the rotation of the third water conveying hard pipe 23, normal conveying of ultrahigh pressure water is guaranteed, and then normal work of the ultrahigh pressure water cutting type heading machine is guaranteed.

In this embodiment, during actual installation, the water tank 7, the precision filter 8 and the ultrahigh pressure water pump 9 are all arranged on the machine body 1, the water tank 7, the precision filter 8 and the ultrahigh pressure water pump 9 are all located above the machine body 1, the first water delivery hose 19, the first water delivery hard pipe 20, the second water delivery hose 21 and the second water delivery hard pipe 22 are all installed in the machine body 1, the third water delivery hard pipe 23, the first three-way joint 24, the first water distribution pipe 25 and the second water distribution pipe 26 are installed in the telescopic arm 5, and the second three-way joint 27, the third water distribution pipe 29, the fourth water distribution pipe 30, the third three-way joint 28, the fifth water distribution pipe 31 and the sixth water distribution pipe 32 are all installed in the conical cutting head 6.

In this embodiment, in actual use, the lengths of the first water distribution pipe 25 and the second water distribution pipe 26 are not less than the length of the telescopic arm 5 when the telescopic arm 5 extends, so as to ensure that the conveying pipes can convey the ultrahigh pressure water for the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 when the telescopic arm 5 of the ultrahigh pressure water cutting-type heading machine is in the extending and retracting working states.

As shown in fig. 2, in the present embodiment, a third water diversion pipe 29 is connected to the second port of the second three-way joint 27, and the end of the third water diversion pipe 29 far from the second three-way joint 27 is communicated with the first jewel nozzle 11 through the first jewel holder 10;

a third port of the second three-way joint 27 is connected with a fourth water distribution pipe 30, and the end part of the fourth water distribution pipe 30 far away from the second three-way joint 27 is communicated with the second jewel nozzle 13 through the second jewel seat 12;

a second port of the third three-way joint 28 is connected with a fifth water distribution pipe 31, and the end part, far away from the third three-way joint 28, of the fifth water distribution pipe 31 is communicated with a third jewel nozzle 15 through a third jewel seat 14;

and a third port of the third three-way joint 28 is connected with a sixth water diversion pipe 32, and the end part of the sixth water diversion pipe 32, which is far away from the third three-way joint 28, is communicated with a fourth jewel nozzle 17 through a fourth jewel seat 16.

In this embodiment, the first jewel seat 10, the second jewel seat 12, the third jewel seat 14 and the fourth jewel seat 16 are all welded on the conical cutting head 6, and the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 are respectively in threaded connection with the first jewel seat 10, the second jewel seat 12, the third jewel seat 14 and the fourth jewel seat 16, so that the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 or the fourth jewel nozzle 17 can be replaced conveniently.

As shown in fig. 2, in this embodiment, the first jewel nozzle 11 is detachably connected to the first jewel holder 10, the second jewel nozzle 13 is detachably connected to the second jewel holder 12, the third jewel nozzle 15 is detachably connected to the third jewel holder 14, and the fourth jewel nozzle 17 is detachably connected to the fourth jewel holder 16.

As shown in fig. 4, the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 have the same structure, each of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 includes a nozzle body 40, a tapered channel 34 provided in the nozzle body 40, and a straight channel 35 provided in the nozzle body 40 and communicating with the tapered channel 34, the taper angle of the tapered channel 34 is 13 °, and the length of the straight channel 35 is 2 to 4 times the diameter of the straight channel 35.

In this embodiment, the diameters of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17 refer to the diameters of the straight flow path 35 of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17.

In this embodiment, the length of the straight flow channel 35 is set to be 2 to 4 times the diameter of the straight flow channel 35: when the length of the straight flow passage 35 is less than 2 times of the diameter of the straight flow passage 35, the water flow jetted by the jetting ports of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is divergent, so that the pressure of the ultrahigh pressure water jetted by the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 to the surface of the coal seam to be cut is not enough to cut the coal seam; when the length of the straight flow passage 35 is greater than 4 times of the diameter of the straight flow passage 35, the water flow jetted by the jetting ports of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is linear, and the water flow diffusion is small, so that the cutting seam width formed on the surface of the coal seam to be cut by the ultrahigh-pressure water jetted to the surface of the coal seam to be cut by the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is small, and the cutting effect is poor.

In this embodiment, the distance between the first jewel nozzle 11 and the second jewel nozzle 13 along the length direction of the tapered cutting head 6 is 200mm, the distance between the second jewel nozzle 13 and the third jewel nozzle 15 along the length direction of the tapered cutting head 6 is 200mm, the distance between the third jewel nozzle 15 and the fourth jewel nozzle 17 along the length direction of the tapered cutting head 6 is 200mm, a gap is provided between the first jewel nozzle 11 and the rear end of the tapered cutting head 6, and a gap is provided between the fourth jewel nozzle 17 and the front end of the tapered cutting head 6;

the first, second, third and

fourth stone settings

10, 12, 14, 16 are each located in the space between two adjacent picks 18.

In this embodiment, the distance between the first jewel nozzle 11 and the rear end face of the conical cutting head 6 and the distance between the fourth jewel nozzle 17 and the front end face of the conical cutting head 6 are the same.

In this embodiment, a cutting pick close to the first jewel nozzle 11 is denoted as a first reference cutting pick 36, a cutting pick close to the second jewel nozzle 13 is denoted as a second reference cutting pick 37, a cutting pick close to the third jewel nozzle 15 is denoted as a third reference cutting pick 38, and a cutting pick close to the fourth jewel nozzle 17 is denoted as a fourth reference cutting pick 39; the shortest distance between the jet orifice of the first jewel nozzle 11 and the axis of the conical cutting head 6 is smaller than the shortest distance between the first reference cutting pick 36 and the axis of the conical cutting head 6; the shortest distance between the jet orifice of the second jewel nozzle 13 and the axis of the conical cutting head 6 is smaller than the shortest distance between the second reference pick 37 and the axis of the conical cutting head 6; the shortest distance between the jet orifice of the third gem nozzle 15 and the axis of the conical cutting head 6 is smaller than the shortest distance between the third reference cutting pick 38 and the axis of the conical cutting head 6; the shortest distance between the jet orifice of the fourth gemstone nozzle 17 and the axis of the conical cutting head 6 is smaller than the shortest distance between the fourth reference pick 39 and the axis of the conical cutting head 6.

In this embodiment, the included angle between the projection of the axis of the first jewel nozzle 11 on the horizontal plane where the axis of the conical cutting head 6 is located and the axis of the conical cutting head 6 is 15-30 degrees;

the included angle between the projection of the axis of the second gem nozzle 13 on the horizontal plane where the axis of the conical cutting head 6 is positioned and the axis of the conical cutting head 6 is 15-30 degrees;

the included angle between the projection of the axis of the third gem nozzle 15 on the horizontal plane where the axis of the conical cutting head 6 is positioned and the axis of the conical cutting head 6 is 15-30 degrees;

the included angle between the projection of the axis of the fourth jewel nozzle 17 on the horizontal plane where the axis of the conical cutting head 6 is positioned and the axis of the conical cutting head 6 is 15-30 degrees;

the horizontal plane of the axis of the conical cutting head 6 is vertical to the rear end face of the conical cutting head 6.

In this embodiment, in actual use, the jet flow directions of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 are all close to the advancing direction of the ultrahigh pressure water cutting type heading machine.

In this embodiment, the diameters of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 are all 0.5mm to 0.6 mm.

Fig. 3 shows an ultrahigh pressure water-cutting coal seam cutting method, which is combined with fig. 1 and 2, and comprises the following steps:

step one, acquiring a coal seam Poulper hardness coefficient:

step 101, detecting the compressive strength of a coal seam to be cut:

102, calculating the Python hardness coefficient of the coal seam to be cut:

according to the formula

Obtaining the general of the coal seam to be cutA coefficient of hardness f;

step two, setting parameters of the nozzle:

step 201, when the coefficient f of the Pythiier hardness of the coal seam to be cut is [ 3-5 ], setting the jet pressure of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 to be 140MPa, and setting the jet flow of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 to be 7.5L/min;

when the coefficient f of the Pythiier hardness of the coal seam to be cut is [ 5-10 ], setting the jet pressure of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 to be 280MPa, and setting the jet flow of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 to be 7.5L/min;

step 202, when the coefficient f of the Pythiier hardness of the coal seam to be cut is [ 3-5 ], selecting the diameters of a first jewel nozzle 11, a second jewel nozzle 13, a third jewel nozzle 15 and a fourth jewel nozzle 17 to be 0.6 mm;

when the coefficient f of the Pythiier hardness of the coal seam to be cut is [ 5-10 ], the diameters of a first jewel nozzle 11, a second jewel nozzle 13, a third jewel nozzle 15 and a fourth jewel nozzle 17 are all 0.5 mm;

step three, cutting the coal seam:

303, enabling the development machine to be close to the area to be cut through the walking part 3, and then operating the shovel part 4 to descend to the bottom of the area to be cut; wherein, the bottom of the shovel plate part 4 is positioned at the bottom of a coal mine roadway which is formed by tunneling;

step 304, operating the telescopic arm 5 to enable the conical cutting head 6 to be close to one end of the 1 st area to be cut; wherein the front end face of the conical cutting head 6 is attached to the surface of the coal bed at one end of the 1 st area to be cut;

step 305, operating the precision filter 8 and the ultrahigh pressure water pump 9 to work, enabling water in the water tank 7 to enter the ultrahigh pressure water pump 9 through the precision filter 8, and enabling the ultrahigh pressure water pump 9 to provide ultrahigh pressure water for the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 through the conveying pipes;

step 306, operating the telescopic arm 5 to extend until the length of the conical cutting head 6 extending into the 1 st area to be cut meets 600-700 mm; during the process that the conical cutting head 6 extends into the 1 st area to be cut, ultrahigh pressure water in the first jewel nozzle 11, ultrahigh pressure water in the second jewel nozzle 13, ultrahigh pressure water in the third jewel nozzle 15 and ultrahigh pressure water in the fourth jewel nozzle 17 are all sprayed to the 1 st area to be cut, so that the coal bed in the 1 st area to be cut is cut;

307, operating the telescopic arm 5 to move towards the other end of the 1 st to-be-cut area along the width direction of the coal mine roadway, and continuously cutting the coal seam of the 1 st to-be-cut area by using the ultrahigh pressure water in the first jewel nozzle 11, the ultrahigh pressure water in the second jewel nozzle 13, the ultrahigh pressure water in the third jewel nozzle 15 and the ultrahigh pressure water in the fourth jewel nozzle 17 in the process that the telescopic arm 5 moves along the width direction of the coal mine roadway until the coal seam of the 1 st to-be-cut area is cut;

308, operating the telescopic arm 5 to enable the conical cutting head 6 to be close to the other end of the 2 nd area to be cut; wherein the front end face of the conical cutting head 6 is attached to the coal bed surface at the other end of the 2 nd area to be cut;

step 309, repeating the step 306 and the step 307, and operating the telescopic arm 5 to move to one end of the 2 nd area to be cut along the width direction of the coal mine roadway to finish cutting of the coal seam of the 2 nd area to be cut;

and 3011, operating the walking part 3 to enable the tunneling machine to move to be close to the tunneling section of the next roadway along the length direction of the coal mine roadway to cut the coal bed.

In the embodiment, when the conical cutting head (6) cuts the coal bed at any tunneling section, the telescopic arm (5) drives the conical cutting head (6) to cut along an S-shaped route at any tunneling section.

In this embodiment, the ejection flow rates of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17 refer to the flow rates at the ejection ports of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17.

In this embodiment, the bottom of each cutting area is parallel to the width direction of the coal mine roadway, the length of the roadway tunneling section is not greater than the length of the conical cutting head 6, and the height of each area to be cut is not greater than the diameter of the rear end face of the conical cutting head 6.

In this embodiment, the jet pressures of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17 are referred to as jet pressures p.

In the embodiment, when the coefficient f of the Pythiier hardness of the coal seam to be cut is [ 3-5 ], the jet pressure of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is 140MPa, the total jet flow of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is 30L/min, and the total jet flow is calculated according to a formula

q is total jet flow, and q is 30L/min; mu is a nozzle flow coefficient, and mu is 0.95; p is the jet pressure and p is 140MPa, the diameter d of the total jet cross section of the nozzle is obtained_Z1.16mm, according to the formula

Obtaining a first jewel nozzle 11 and a second jewel nozzle13. The diameters of the third jewel nozzle 15 and the fourth jewel nozzle 17 are both 0.58mm, and the diameters of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 are all 0.6 mm.

Meanwhile, when the coefficient f of the Pythriters hardness of the coal seam to be cut is [ 5-10%]When the flow rate is high, the jet pressure of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is 280MPa, the total jet flow rate of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is 30L/min, and the total jet flow rate is calculated according to a formula

q is total jet flow, and q is 30L/min; mu is a nozzle flow coefficient, and mu is 0.95; p is the jet pressure and p is 280MPa, giving the diameter d of the total jet cross-section of the nozzle_Z0.957mm, according to the formula

The diameters of the obtained first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 are all 0.478mm, and the diameters of the obtained first jewel nozzle 11, the obtained second jewel nozzle 13, the obtained third jewel nozzle 15 and the obtained fourth jewel nozzle 17 are all 0.5 mm.

In this embodiment, it should be noted that when the jet impact force of the ultrahigh-pressure water jet on the surface of the coal seam to be cut is greater than 10 times of the average value R of the unidirectional ultimate compressive strength of the coal seam to be cut, the ultrahigh-pressure water jet can effectively cut the coal seam.

In this embodiment, in practical use, when the coefficient F of the straight hardness of the coal seam to be cut is [ 3-5 ], the diameters of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 are all 0.6mm, and according to the formula F ═ pi d²p and d are nozzle diameters, d is 0.6mm, p is jet pressure, p is 140MPa, pi is 3.14, the jet hitting force F of the ultra-high pressure water jetted from the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 to the surface of the coal seam to be cut is 158N, and the jet hitting force F recorded as the nozzle hits the surface of the coal seam to be cutImpact force F; then, the ratio of the jet flow hitting force F of the nozzle to 9.8N/Kg is used to obtain the conversion value of the jet flow hitting force of the nozzle, which is 16.1 Kg; the areas of the ejection ports of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17

The first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 jet to the jet hitting power of the surface of the coal seam to be cut per unit area

Get straight shi hardness coefficient f and become 5, should treat that the one-way ultimate compressive strength average value R in cut coal seam is 50MPa, and the one-way ultimate compressive strength average value R in the coal seam of treating cutting of superhigh pressure water jet in first precious stone nozzle 11, second precious stone nozzle 13, third precious stone nozzle 15 and the fourth precious stone nozzle 17 is greater than 10 times the one-way ultimate compressive strength average value R in cut coal seam of treating the jet impact force on cut coal seam surface, can satisfy the requirement of coal seam cutting.

Meanwhile, when the coefficient f of the Pythriters hardness of the coal seam to be cut is [ 5-10%]The diameters of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 are all 0.5mm, and pi d is obtained according to the formula F²p and d are the diameter of the nozzle, d is 0.5mm, p is the jet pressure, p is 280MPa, and pi is 3.14, so that the jet hitting force F of the ultrahigh pressure water jetted to the surface of the coal seam to be cut by the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 is 220N and is recorded as the jet hitting force F of the nozzle; then, the ratio of the jet flow hitting force F of the nozzle to 9.8N/Kg is used to obtain the conversion value of the jet flow hitting force of the nozzle, which is 22.4 Kg; the areas of the ejection ports of the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17

The first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 jet to the jet beating of the surface of the coal seam to be cut in unit areaImpact force

The straight hardness coefficient f is 10, the average value R of the one-way ultimate compressive strength of the coal seam to be cut is 100MPa, the jet hitting force of the ultrahigh-pressure water jet in the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15 and the fourth jewel nozzle 17 on the surface of the coal seam to be cut is more than 10 times of the average value R of the one-way ultimate compressive strength of the coal seam to be cut, and the requirement of cutting the coal seam can be met.

In this embodiment, in step 305, the ultrahigh pressure water pump 9 supplies ultrahigh pressure water to the first jewel nozzle 11, the second jewel nozzle 13, the third jewel nozzle 15, and the fourth jewel nozzle 17 through the delivery pipe, and the specific process is as follows:

3051, conveying the ultrahigh-pressure water at the water outlet of the ultrahigh-pressure water pump 9 to a third water conveying hard pipe 23 through a first water conveying hose 19, a first water conveying hard pipe 20, a second water conveying hose 21 and a second water conveying hard pipe 22 in sequence;

3052, distributing the ultrahigh-pressure water in the third water delivery hard pipe 23 to a first water distribution pipe 25 and a second water distribution pipe 26 through a first three-way joint 24;

3053, distributing the ultrahigh pressure water in the first water distribution pipe 25 to a third water distribution pipe 29 and a fourth water distribution pipe 30 through a second tee joint 27, conveying the ultrahigh pressure water in the third water distribution pipe 29 to the first jewel orifice 11 through the first jewel seat 10, conveying the ultrahigh pressure water in the fourth water distribution pipe 30 to the second jewel orifice 13 through the second jewel seat 12,

meanwhile, the ultrahigh pressure water in the second water dividing pipe 26 is divided into a fifth water dividing pipe 31 and a sixth water dividing pipe 32 through a third three-way joint 28, the ultrahigh pressure water in the fifth water dividing pipe 31 is conveyed to a third jewel nozzle 15 through a third jewel seat 14, and the ultrahigh pressure water in the sixth water dividing pipe 32 is conveyed to a fourth jewel nozzle 17 through a fourth jewel seat 16.

In this embodiment, in step 306, the ultrahigh pressure water in the first gem nozzle 11, the ultrahigh pressure water in the second gem nozzle 13, the ultrahigh pressure water in the third gem nozzle 15, and the ultrahigh pressure water in the fourth gem nozzle 17 are all injected to the 1 st to-be-cut area, so as to cut the coal seam in the 1 st to-be-cut area, and the specific process is as follows:

step 3061, rotating the conical cutting head 6 to drive a first jewel nozzle 11, a second jewel nozzle 13, a third jewel nozzle 15 and a fourth jewel nozzle 17 on the conical cutting head 6 to rotate, and spraying ultrahigh pressure water in the first jewel nozzle 11, ultrahigh pressure water in the second jewel nozzle 13, ultrahigh pressure water in the third jewel nozzle 15 and ultrahigh pressure water in the fourth jewel nozzle 17 to a 1 st zone to be cut to respectively form a first annular cutting seam, a second annular cutting seam, a third annular cutting seam and a fourth annular cutting seam; the depths of the first annular slot, the second annular slot, the third annular slot and the fourth annular slot are all 150-200 mm, the central lines of the first annular slot, the second annular slot, the third annular slot and the fourth annular slot are parallel to the length direction of a coal mine roadway, the radiuses of circles where the first annular slot, the second annular slot, the third annular slot and the fourth annular slot are located are sequentially reduced, and coal blocks between two adjacent slots fall onto the shovel plate part 4 when the first annular slot, the second annular slot, the third annular slot and the fourth annular slot are formed;

step 3062: the telescopic arm 5 is operated to move towards the other end of the 1 st zone to be cut along the width direction of the coal mine roadway, ultrahigh pressure water in the first jewel nozzle 11, ultrahigh pressure water in the second jewel nozzle 13, ultrahigh pressure water in the third jewel nozzle 15 and ultrahigh pressure water in the fourth jewel nozzle 17 are all sprayed to the 1 st zone to be cut to respectively form a next first annular slot, a next second annular slot, a next third annular slot and a next fourth annular slot, and coal blocks between two adjacent slots fall onto the shovel plate part 4 when the next first annular slot, the next second annular slot, the next third annular slot and the next fourth annular slot are formed;

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an ultrahigh pressure water cutting type entry driving machine which characterized in that: comprises a machine body (1), a cutting part (2), a walking part (3) and a shovel board part (4), as well as an ultrahigh pressure water supply mechanism arranged on the machine body (1) and a gem nozzle part arranged on the cutting part (2);

the cutting part (2) comprises a telescopic arm (5) connected with the machine body (1) and a conical cutting head (6) arranged at the end part of the telescopic arm (5) and far away from the machine body (1), and a plurality of cutting teeth (18) are arranged on the conical cutting head (6);

the ultrahigh-pressure water supply mechanism comprises a water tank (7), a precision filter (8) and an ultrahigh-pressure water pump (9) which are arranged on the machine body (1), and the water tank (7), the precision filter (8) and the ultrahigh-pressure water pump (9) are communicated in sequence;

the number of the gem nozzle components is four, the four gem nozzle components are respectively a first gem nozzle component, a second gem nozzle component, a third gem nozzle component and a fourth gem nozzle component, the first gem nozzle component comprises a first gem seat (10) and a first gem nozzle (11) communicated with the first gem seat (10), the second gem nozzle component comprises a second gem seat (12) and a second gem nozzle (13) communicated with the second gem seat (12), the third precious stone nozzle component comprises a third precious stone base (14) and a third precious stone nozzle (15) communicated with the third precious stone base (14), the fourth gem nozzle component comprises a fourth gem seat (16) and a fourth gem nozzle (17) communicated with the fourth gem seat (16), the first gem holder (10), the second gem holder (12), the third gem holder (14) and the fourth gem holder (16) are all positioned on the conical cutting head (6);

the water outlet of the ultrahigh-pressure water pump (9) is communicated with a first jewel nozzle (11), a second jewel nozzle (13), a third jewel nozzle (15) and a fourth jewel nozzle (17) through conveying pipes, and the first jewel nozzle (11), the second jewel nozzle (13), the third jewel nozzle (15) and the fourth jewel nozzle (17) are uniformly distributed along the length direction of the conical cutting head (6).

2. The ultra-high pressure water cutting type tunneling machine according to claim 1, characterized in that: the conveying pipe comprises a first water conveying hose (19), a first water conveying hard pipe (20), a second water conveying hose (21), a second water conveying hard pipe (22) and a third water conveying hard pipe (23) which are sequentially communicated, and a first water dividing pipe (25) and a second water dividing pipe (26) which are communicated with the third water conveying hard pipe (23) through a first tee joint (24);

the end part, far away from the first water delivery hard pipe (20), of the first water delivery hose (19) is communicated with a water outlet of the ultrahigh-pressure water pump (9), the second water delivery hard pipe (22) is communicated with a third water delivery hard pipe (23) through a rotary joint (33), the fixed end of the rotary joint (33) is connected with the outlet end of the second water delivery hard pipe (22), and the rotary end of the rotary joint (33) is connected with the inlet end of the third water delivery hard pipe (23);

the first port of first three way connection (24) is connected with the exit end of third water delivery hard tube (23), the second port of first three way connection (24) is connected with the entry end of first water distribution pipe (25), the third port of first three way connection (24) is connected with the entry end of second water distribution pipe (26), the exit end of first water distribution pipe (25) is connected with second three way connection (27), just the exit end of first water distribution pipe (25) communicates with the first port of second three way connection (27), the exit end of second water distribution pipe (26) is connected with third three way connection (28), just the exit end of second water distribution pipe (26) communicates with the first port of third three way connection (28).

3. The ultra-high pressure water-cutting tunneling machine according to claim 2, characterized in that: a second port of the second three-way joint (27) is connected with a third water distribution pipe (29), and the end part, far away from the second three-way joint (27), of the third water distribution pipe (29) is communicated with the first jewel nozzle (11) through a first jewel seat (10);

a third port of the second three-way joint (27) is connected with a fourth water distribution pipe (30), and the end part, far away from the second three-way joint (27), of the fourth water distribution pipe (30) is communicated with a second jewel nozzle (13) through a second jewel seat (12);

a second port of the third three-way joint (28) is connected with a fifth water distribution pipe (31), and the end part, far away from the third three-way joint (28), of the fifth water distribution pipe (31) is communicated with a third gem nozzle (15) through a third gem seat (14);

and a third port of the third three-way joint (28) is connected with a sixth water distribution pipe (32), and the end part, far away from the third three-way joint (28), of the sixth water distribution pipe (32) is communicated with a fourth jewel nozzle (17) through a fourth jewel seat (16).

4. The ultra-high pressure water cutting type tunneling machine according to claim 1, characterized in that: the first jewel nozzle (11) is detachably connected with the first jewel seat (10), the second jewel nozzle (13) is detachably connected with the second jewel seat (12), the third jewel nozzle (15) is detachably connected with the third jewel seat (14), and the fourth jewel nozzle (17) is detachably connected with the fourth jewel seat (16);

the structure of the first jewel nozzle (11), the second jewel nozzle (13), the third jewel nozzle (15) and the fourth jewel nozzle (17) are identical, the first jewel nozzle (11), the second jewel nozzle (13), the third jewel nozzle (15) and the fourth jewel nozzle (17) respectively comprise a nozzle body (40), a conical channel (34) arranged on the nozzle body (40) and a straight channel (35) arranged in the nozzle body (40) and communicated with the conical channel (34), the angle of the conical channel (34) is 13 degrees, and the length of the straight channel (35) is 2-4 times of the diameter of the straight channel (35).

5. The ultra-high pressure water cutting type tunneling machine according to claim 1, characterized in that: the distance between the first jewel nozzle (11) and the second jewel nozzle (13) along the length direction of the conical cutting head (6) is 200mm, the distance between the second jewel nozzle (13) and the third jewel nozzle (15) along the length direction of the conical cutting head (6) is 200mm, the distance between the third jewel nozzle (15) and the fourth jewel nozzle (17) along the length direction of the conical cutting head (6) is 200mm, a gap is arranged between the first jewel nozzle (11) and the rear end of the conical cutting head (6), and a gap is arranged between the fourth jewel nozzle (17) and the front end of the conical cutting head (6);

the first jewel seat (10), the second jewel seat (12), the third jewel seat (14) and the fourth jewel seat (16) are all positioned at the gap of two adjacent cutting teeth (18).

6. The ultra-high pressure water cutting type tunneling machine according to claim 1, characterized in that: the included angle between the projection of the axis of the first gem nozzle (11) on the horizontal plane where the axis of the conical cutting head (6) is located and the axis of the conical cutting head (6) is 15-30 degrees;

the included angle between the projection of the axis of the second gem nozzle (13) on the horizontal plane where the axis of the conical cutting head (6) is located and the axis of the conical cutting head (6) is 15-30 degrees;

the projection of the axis of the third gem nozzle (15) on the horizontal plane where the axis of the conical cutting head (6) is located and the included angle between the axis of the conical cutting head (6) are 15-30 degrees;

the included angle between the projection of the axis of the fourth jewel nozzle (17) on the horizontal plane where the axis of the conical cutting head (6) is positioned and the axis of the conical cutting head (6) is 15-30 degrees;

the horizontal plane of the axis of the conical cutting head (6) is vertical to the rear end face of the conical cutting head (6).

7. The ultra-high pressure water cutting type tunneling machine according to claim 1, characterized in that: the diameters of the first jewel nozzle (11), the second jewel nozzle (13), the third jewel nozzle (15) and the fourth jewel nozzle (17) are all 0.5-0.6 mm.

8. A method of cutting a coal seam using the ultra-high pressure water-cutting roadheader of claim 1, the method comprising the steps of:

step one, acquiring a coal seam Poulper hardness coefficient:

step 101, detecting the compressive strength of a coal seam to be cut:

102, calculating the Python hardness coefficient of the coal seam to be cut:

according to the formula

Obtaining the Pythiier hardness coefficient f of the coal seam to be cut;

step two, setting parameters of the nozzle:

step 201, when the Pythiier hardness coefficient f of a coal seam to be cut is [ 3-5 ], setting the jet pressure of a first jewel nozzle (11), a second jewel nozzle (13), a third jewel nozzle (15) and a fourth jewel nozzle (17) to be 140MPa, wherein the jet flow of the first jewel nozzle (11), the second jewel nozzle (13), the third jewel nozzle (15) and the fourth jewel nozzle (17) is 7.5L/min;

when the coefficient f of the Pythiis hardness of the coal seam to be cut is [ 5-10 ], setting the jet pressure of a first jewel nozzle (11), a second jewel nozzle (13), a third jewel nozzle (15) and a fourth jewel nozzle (17) to be 280MPa, and setting the jet flow of the first jewel nozzle (11), the second jewel nozzle (13), the third jewel nozzle (15) and the fourth jewel nozzle (17) to be 7.5L/min;

step 202, when the coefficient f of the Pythiier hardness of the coal seam to be cut is (3-5), selecting the diameters of a first jewel nozzle (11), a second jewel nozzle (13), a third jewel nozzle (15) and a fourth jewel nozzle (17) to be 0.6 mm;

when the coefficient f of the Pythiier hardness of the coal seam to be cut is [ 5-10 ], the diameters of a first jewel nozzle (11), a second jewel nozzle (13), a third jewel nozzle (15) and a fourth jewel nozzle (17) are all 0.5 mm;

step three, cutting the coal seam:

303, enabling the development machine to be close to an area to be cut through the walking part (3), and then operating the shovel part (4) to descend to the bottom of the area to be cut; wherein the bottom of the shovel plate part (4) is positioned at the bottom of a coal mine roadway which is formed by tunneling;

step 304, operating the telescopic arm (5) to enable the conical cutting head (6) to be close to one end of the 1 st area to be cut; the front end face of the conical cutting head (6) is attached to the surface of the coal bed at one end of the 1 st area to be cut;

305, operating a precision filter (8) and an ultrahigh pressure water pump (9) to work, enabling water in a water tank (7) to enter the ultrahigh pressure water pump (9) through the precision filter (8), and enabling the ultrahigh pressure water pump (9) to provide ultrahigh pressure water for a first jewel nozzle (11), a second jewel nozzle (13), a third jewel nozzle (15) and a fourth jewel nozzle (17) through conveying pipes;

step 306, operating the telescopic arm (5) to extend until the length of the conical cutting head (6) extending into the 1 st area to be cut meets 600-700 mm; during the process that the conical cutting head (6) extends into the 1 st area to be cut, ultrahigh pressure water in the first jewel nozzle (11), ultrahigh pressure water in the second jewel nozzle (13), ultrahigh pressure water in the third jewel nozzle (15) and ultrahigh pressure water in the fourth jewel nozzle (17) are all sprayed to the 1 st area to be cut, so that the coal bed in the 1 st area to be cut is cut;

307, operating the telescopic arm (5) to move towards the other end of the 1 st to-be-cut area along the width direction of the coal mine roadway, and continuously cutting the 1 st to-be-cut area coal seam by using ultrahigh pressure water in the first jewel nozzle (11), ultrahigh pressure water in the second jewel nozzle (13), ultrahigh pressure water in the third jewel nozzle (15) and ultrahigh pressure water in the fourth jewel nozzle (17) in the process that the telescopic arm (5) moves along the width direction of the coal mine roadway until the 1 st to-be-cut area coal seam is cut;

308, operating the telescopic arm (5) to enable the conical cutting head (6) to be close to the other end of the 2 nd area to be cut; the front end face of the conical cutting head (6) is attached to the surface of the coal bed at the other end of the 2 nd area to be cut;

309, repeating the step 306 and the step 307, and operating the telescopic arm (5) to move to one end of the 2 nd area to be cut along the width direction of the coal mine roadway to finish cutting of the coal bed of the 2 nd area to be cut;

and 3011, operating the walking part (3) to enable the tunneling machine to move to be close to the next roadway tunneling section along the length direction of the coal mine roadway to cut the coal seam.

9. The method of claim 8, wherein: in the step 305, the ultrahigh pressure water pump (9) provides ultrahigh pressure water for the first jewel nozzle (11), the second jewel nozzle (13), the third jewel nozzle (15) and the fourth jewel nozzle (17) through the delivery pipe, and the specific process is as follows:

3051, conveying the ultrahigh-pressure water at the water outlet of the ultrahigh-pressure water pump (9) to a third water conveying hard pipe (23) through a first water conveying hose (19), a first water conveying hard pipe (20), a second water conveying hose (21) and a second water conveying hard pipe (22) in sequence;

step 3052, distributing the ultrahigh-pressure water in the third water delivery hard pipe (23) to a first water distribution pipe (25) and a second water distribution pipe (26) through a first tee joint (24);

3053, distributing the ultrahigh pressure water in the first water distributing pipe (25) to a third water distributing pipe (29) and a fourth water distributing pipe (30) through a second tee joint (27), conveying the ultrahigh pressure water in the third water distributing pipe (29) to the first jewel nozzle (11) through the first jewel seat (10), conveying the ultrahigh pressure water in the fourth water distributing pipe (30) to the second jewel nozzle (13) through the second jewel seat (12),

meanwhile, ultrahigh pressure water in the second water dividing pipe (26) is divided into a fifth water dividing pipe (31) and a sixth water dividing pipe (32) through a third tee joint (28), the ultrahigh pressure water in the fifth water dividing pipe (31) is conveyed to a third jewel nozzle (15) through a third jewel seat (14), and the ultrahigh pressure water in the sixth water dividing pipe (32) is conveyed to a fourth jewel nozzle (17) through a fourth jewel seat (16).

10. The method of claim 8, wherein: in the step 306, the ultrahigh pressure water in the first gem nozzle (11), the ultrahigh pressure water in the second gem nozzle (13), the ultrahigh pressure water in the third gem nozzle (15) and the ultrahigh pressure water in the fourth gem nozzle (17) are all sprayed to the 1 st area to be cut, so that the coal seam of the 1 st area to be cut is cut, and the specific process is as follows:

step 3061, rotating the conical cutting head (6) to drive a first jewel nozzle (11), a second jewel nozzle (13), a third jewel nozzle (15) and a fourth jewel nozzle (17) on the conical cutting head (6) to rotate, and spraying ultrahigh-pressure water in the first jewel nozzle (11), ultrahigh-pressure water in the second jewel nozzle (13), ultrahigh-pressure water in the third jewel nozzle (15) and ultrahigh-pressure water in the fourth jewel nozzle (17) to a 1 st area to be cut to respectively form a first annular slot, a second annular slot, a third annular slot and a fourth annular slot; the depth of each of the first annular slot, the second annular slot, the third annular slot and the fourth annular slot is 150-200 mm, the central lines of the first annular slot, the second annular slot, the third annular slot and the fourth annular slot are parallel to the length direction of a coal mine roadway, the radius of the circle where the first annular slot, the second annular slot, the third annular slot and the fourth annular slot are located is sequentially reduced, and coal blocks between two adjacent slots fall onto the shovel plate part (4) when the first annular slot, the second annular slot, the third annular slot and the fourth annular slot are formed;

step 3062: the telescopic arm (5) is operated to move towards the other end of the 1 st zone to be cut along the width direction of a coal mine roadway, ultrahigh pressure water in the first jewel nozzle (11), ultrahigh pressure water in the second jewel nozzle (13), ultrahigh pressure water in the third jewel nozzle (15) and ultrahigh pressure water in the fourth jewel nozzle (17) are all sprayed to the 1 st zone to be cut to respectively form a next first annular slot, a next second annular slot, a next third annular slot and a next fourth annular slot, and coal blocks between two adjacent slots fall onto the shovel plate part (4) when the next first annular slot, the next second annular slot, the next third annular slot and the next fourth annular slot are formed;