CN208010337U - A kind of coalcutter and its roller - Google Patents

Abstract

The utility model discloses a kind of coalcutter and its roller, including cylinder, end plate, two and more than two helical blades and multiple picks, one end of the end plate and the cylinder are fixedly linked, and is located at the one end of the cylinder towards coal wall；Each helical blade is along the circumferentially disposed of the cylinder, and the end of each helical blade is fixedly linked with the end plate；Each helical blade includes divergent segment and isometrical section, and the width of the divergent segment gradually increases since the end plate side, finally equal with isometrical section of the width；The multiple pick interval is arranged on the end plate and each helical blade.The utility model can effectively reduce the generation of coal wall caving and roof fall accident, can greatly improve the safety in coal production.

Description

A kind of coalcutter and its roller

Technical field

The utility model relates generally to a kind of coalcutter, in particular to a kind of coalcutter and its roller.

Background technology

Coal wall caving and face roof- fall are the Common Accidents being happened at during coal mine high seam working face mining, and thing occurs Working face halt production is be easy to cause after therefore, equipment is impaired, the even heavy losses such as casualties exist.Therefore, coal wall caving becomes One of hot issue in Coal Mine Disasters improvement, a series of resolutions have been currently formed for this problem.But it is taken Project and measures mostly be for coal wall reinforcing or roof pressure alleviation, do not account for coal mining machine roller cutting coal wall and formed Influence of the spatial shape to coal wall caving.Helix drum is that coalcutter opens working face notch, coal breakage, the mechanism coaling, spiral shell certainly Rotating drum is mainly made of cylinder, end plate, helical blade, toothholder, pick, nozzle.Wherein, helical blade is welded in cylinder with end plate On body, toothholder is welded on blade and end plate, and the pick for coal breakage is fixed in toothholder.

It focuses mostly at present in the change to cylindrical shape for traditional Shearer Helical Drum, such as truncated cone type, arc cylinder, Or lift angle scheme is become using helical blade, increase space of coalingging to reach, improves produce coal efficiency and the purpose of lump coal rate；And or Pick form is transformed in person, increases helical blade wear plate to improve the service life of helix drum.However it is not concerned about spiral Influence of the leaf morphology to coal mining, the rotation enveloping surface of traditional coalcutter helical blade are cylindrical surface, after the complete coal body of cutting, top Plate forms a rectangular area with coal wall, and in sharp corner due to stress concentration effect, coal wall easily destroys herein, finally Cause wall caving and face roof- fall accident, especially coal mine high seam working face, the increase of mining height that coal wall caving, end face leakage are emitted Problem is more prominent, and the bulk coal and rock of several meters of eminences, which is fallen, easily to cause casualties, and equipment damage carries out accident treatment Time is long, does not meet the requirement of safety in production and high-yield and high-efficiency production.Therefore industry is badly in need of improving coalcutter cutting effect, to carry The safety of high coal production.

Above- mentioned information is only used for reinforcing the understanding to the background of the utility model disclosed in the background technology part, because This it may include the information not constituted to the prior art known to persons of ordinary skill in the art.

Utility model content

A series of concept of reduced forms is introduced in utility model content part, this will be in specific embodiment part Middle further description.The utility model content part is not meant to attempt to limit technical solution claimed Key feature and essential features, do not mean that more attempt determine technical solution claimed protection domain.

One main purpose of the utility model is to overcome at least one defect of the above-mentioned prior art, provides a kind of energy Enough improve the coal mining machine roller of coal mine production safety.

Another main purpose of the utility model is to overcome at least one defect of the above-mentioned prior art, provides one kind The coalcutter of coal mine production safety can be improved.

To realize above-mentioned purpose of utility model, the utility model adopts the following technical solution：

One side according to the present utility model, provides a kind of coal mining machine roller, including cylinder, end plate, two and two A above helical blade and multiple picks, one end of the end plate and the cylinder are fixedly linked, and are located at the cylinder One end towards coal wall；

Each helical blade is along the circumferentially disposed of the cylinder, and the end of each helical blade and the end plate are solid It is fixed to be connected；Each helical blade includes divergent segment and isometrical section, the width of the divergent segment since the end plate side by It is cumulative big, it is finally equal with isometrical section of the width；

The multiple pick interval is arranged on the end plate and each helical blade.

An embodiment according to the present utility model, the wherein quantity of helical blade are two to four, each helical-blade Piece encloses cornerite and is greater than or equal to 210 °~140 °, and the quantity of the helical blade and the cornerite size of enclosing are in inverse ratio.

An embodiment according to the present utility model, wherein the helical blade number is two, the helical blade It encloses cornerite and is greater than or equal to 210 °；The helical blade number is three, and the cornerite that encloses of the helical blade is greater than or equal to 140°；The helical blade number is four, and the cornerite that encloses of the helical blade is greater than or equal to 105 °.

An embodiment according to the present utility model, wherein the envelope of the divergent segment is circular arc line, described isometrical section Envelope be straight line.

An embodiment according to the present utility model, wherein the straight line of the helical blade tail portion is leaf tail sideline, from The direction of end plate sees that the pick against the leaf tail sideline is known as the first pick, and axial position rearward is to be located at another spiral shell One pick of vane on piece, referred to as the second pick, axial position is a pick for being located at the end plate edge rearward again, is claimed For third pick, multiple third picks are determined by multiple leaf tail sidelines of multiple helical blades, and end plate edge remaining cut Tooth is uniformly distributed between the third pick.

An embodiment according to the present utility model, wherein the toothholder surrounding of first pick is provided with intensive aspect.

An embodiment according to the present utility model, wherein the multiple pick interval be distributed in the helical blade and On the edge of end plate；Axis being distributed in the plane of the end plate in for center of circle interval of the multiple pick along the cylinder.

An embodiment according to the present utility model, wherein the axis of the axis direction of the multiple pick and the cylinder The angle in direction is 30 °~60 °.

An embodiment according to the present utility model, wherein each pick is rotatably mounted in toothholder, running Middle self-sharpening.

Another aspect according to the present utility model, a kind of coalcutter are equipped at least one coalcutter rolling as described above Cylinder.

As shown from the above technical solution, it is with good effect the advantages of the coalcutter and its roller of the utility model：

The helical blade of the utility model uses divergent segment and isometrical section of design, can make the coal mining of the utility model The angle that machine cylinder is removed between coal wall and top coal is arc transition, and the folder of the coal wall and top plate of traditional coal mining machine roller stripping Angle is right angle.By plastoelasticity it is found that the case where stress concentration degree near sharp corner is than rounding off is much bigger. Therefore, the utility model can be designed so that the stress concentration of coal wall that coal mining machine roller institute cutting goes out obtains greatly using above-mentioned Alleviation, plastic zone range reduces, reduces coal wall and leak the risk that risks in top skew lines, arc sliding wall caving and end.Separately The coal wall that the coal mining machine roller cutting of outer the utility model is formed concaves towards inside, and the mechanics of middle part drawing crack formula wall caving occurs with coal wall Feature forms the antisymmetry of structural form, therefore also reduces the risk that middle part drawing crack formula wall caving occurs for coal wall.It is possible thereby to this Utility model can not only effectively reduce the wall caving on coal wall top and end leakage is taken risks, but also effectively reduce in coal wall The probability of portion's drawing crack formula wall caving, to greatly improve the safety of coal production.

Description of the drawings

Consider the detailed description of the following preferred embodiment to the utility model in conjunction with the accompanying drawings, the utility model it is each Kind target, feature and advantage will become apparent.Attached drawing is only the exemplary diagram of the utility model, is not necessarily It is drawn to scale.In the accompanying drawings, same reference numeral always shows same or similar component.Wherein：

Fig. 1 is a kind of stereoscopic schematic diagram of coal mining machine roller shown according to an illustrative embodiments.

Fig. 2 is a kind of schematic side view of coal mining machine roller shown according to an illustrative embodiments.

Fig. 3 is a kind of schematic front view of coal mining machine roller shown according to an illustrative embodiments.

Fig. 4 is a kind of coal mining machine roller ecto-entad cutting schematic diagram shown according to an illustrative embodiments.

Fig. 5 is a kind of the first pick intensive aspect side view signal of coal mining machine roller shown according to an illustrative embodiments Figure.

Fig. 6 is the sectional schematic diagram of the coalcutter front roll cutting coal wall of the prior art.

Fig. 7 is the sectional schematic diagram of the coalcutter back roll cutting coal wall of the prior art.

Fig. 8 is that a kind of helical blade shown according to an illustrative embodiments is cut without isometrical section of coalcutter front roll The sectional schematic diagram of coal cutting wall.

Fig. 9 is that a kind of helical blade shown according to an illustrative embodiments is cut without isometrical section of coalcutter back roll The sectional schematic diagram of coal cutting wall.

Figure 10 is a kind of sectional schematic diagram of coalcutter front roll cutting coal wall shown according to an illustrative embodiments.

Figure 11 is a kind of sectional schematic diagram of coalcutter back roll cutting coal wall shown according to an illustrative embodiments.

Specific implementation mode

Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that this practicality is new Type will be full and complete, and the design of example embodiment is comprehensively communicated to those skilled in the art.It is identical in figure Reference numeral indicates same or similar structure, thus will omit their detailed description.

Described feature, structure or characteristic can be incorporated in one or more embodiments in any suitable manner In.In the following description, many details are provided to provide fully understanding to the embodiment of the utility model.So And it will be appreciated by persons skilled in the art that the technical solution of the utility model can be put into practice without in the specific detail It is one or more, or other methods, component, material may be used etc..In other cases, it is not shown in detail or describes public affairs Know structure, material or operation to avoid the various aspects of fuzzy the utility model.

In order to make those skilled in the art that can more be clearly understood from the principles of the present invention and its design feature, now will Overall plan and the advantageous effect synthesis of the utility model are described as follows.

The utility model provides a kind of coal mining machine roller that can effectively prevent coal wall caving, may include cylinder, end Disk, helical blade, pick, pick box and intensive aspect, the end plate are welded on cylinder close to coal wall side, the helical-blade Piece is welded on the outside of cylinder, while also being welded with end plate.The width of the helical blade is not constant always, by proximal disk The width of side, helical blade is minimum, and toward goaf direction, width progressively increases to maximum value, this part of helical blade Referred to as divergent segment, and the remaining part for keeping maximum width is known as isometrical section, the helical blade divergent segment is with isometrical section One entirety, the pick uniform welding is on end plate and helical blade.

According to statistics, coal wall caving type is divided into different failure modes, specific table according to the difference of coal quality hardness It is now that middle part drawing crack formula wall caving and top skew lines matrix side mainly occur for hard coal wall, upper arcuate mainly occurs for rockburst Slide wall caving, it is seen that the upper angle of coal wall and middle part are the key areas that wall caving occurs.The helical blade flaring of the utility model The envelope of section is circular arc, is arc transition between the coal wall and top coal of stripping, and the coal wall of traditional coal mining machine roller stripping Angle with top plate is right angle, by plastoelasticity it is found that near sharp corner feelings of the stress concentration degree than rounding off Condition is much bigger.Therefore the stress concentration for the coal wall that the coal mining machine roller institute cutting of the utility model goes out is greatly alleviated, and is moulded Property area range reduce, reduce coal wall and leak the risk risked in top skew lines, arc sliding wall caving and end.In addition coalcutter rolls The coal wall that cylinder cutting is formed concaves towards inside, and the mechanics feature that middle part drawing crack formula wall caving occurs with coal wall forms the opposition of structural form Claim, therefore also reduces the risk that middle part drawing crack formula wall caving occurs for coal wall.

The envelope of the helical blade divergent segment of the utility model is circular arc, and isometrical section of envelope is straight line, described Helical blade number be 2~4, each helical blade is identical, the size and helical blade for enclosing cornerite of helical blade Number it is related, the cornerite that encloses refers to the angle that helical blade is unfolded on cylinder direction, in order to ensure roller transport Do not generate stress mutation when coal, should have linking between the helical blade, when helical blade number be 2 when, enclose cornerite >= 210 °, when helical blade number is 3, cornerite >=140 ° are enclosed, when helical blade number is 4, enclose cornerite >=105 °.

The envelope of isometrical section of the helical blade of the utility model is straight line so that after coal mining machine roller cutting, is removed The remaining top coal and ground coal that divergent segment generates in upper coal cutting cycle, such design can ensure that coalcutter completes cutting Afterwards, during elapsing hydraulic support, set cap is in during original plane, and passage drag conveyor, scraper plate conveying Machine bottom surface is still within original plane.

The pick of the utility model is fixed on by circlip in toothholder, and when cutting coal body can spin, and have The effect of self-sharpening.Toothholder is welded in the plane of end plate, on the edge of end plate and on helical blade edge.Wherein it is located at end Pick in disk plane and edge respectively forms a circle, and axis is directed toward the steering of roller, and the elevation angle is 20 °~60 °, and is biased to coal 20 °~45 ° of wall, the pick being located on helical blade edge, axis are directed toward the steering of roller, and the elevation angle is 20 °~60 °, and partially It is equal to helical blade lift angle to the angle in goaf direction.The axis direction of pick is identical as the steering of roller, and is biased to coal wall, The axis direction angle of pick axis direction and cylinder is 30 °~60 °.

The straight line of the helical blade tail portion is known as leaf tail sideline, in terms of the direction of end plate, against cutting for leaf tail sideline Tooth is known as the first pick, and position is a pick being located on another helical blade, referred to as the second pick, then rearward rearward Position is a pick positioned at end plate edge, referred to as third pick, in total may be used by n leaf tail sideline of n helical blade To determine n third pick, and remaining pick of end plate edge is uniformly distributed between the third pick.In end plate plane Pick using end plate midpoint as the center of circle, be circumferentially uniformly distributed, the pick on helical blade edge is uniformly distributed along edge camber line. The pick setting form then to be middle part again first by cutting on the outside of coal wall, by cutting, to be finally only end plate side Coal wall at edge is by cutting, the cutting sequence of such ecto-entad so that produce the new scope of freedom when external cutting, reduce Required energy consumption when the cutting of middle part also produces the new scope of freedom, reduces end plate likewise, after coal wall middle part is by cutting The required energy consumption of edge cutting.That is, the coal cutting sequence of ecto-entad makes the specific energy consumption of roller greatly reduce, But also slow down the abrasion that internal pick is subject to.

First pick, the second pick, third pick position successively rearward, the toothholder surrounding of first pick It is welded with intensive aspect.Due to the first pick always coal cutting at first of coal mining machine roller, when drum rotation speed is slower, the first pick by Power is larger, may make toothholder weld cracking, and an intensive aspect is welded between helical blade and toothholder and is conducive to prevent toothholder from welding Seam stress reaches capacity, and there is a phenomenon where be broken.

The cylinder is the truncated cone, and the radius by proximal disk side is maximum, and toward goaf direction, radius is gradually reduced, The angle of the semi-cone angle of the truncated cone can be 2 °~6 ° between.Since helical blade is from divergent segment to isometrical section of variation, in addition Half radial goaf direction of frusto-conical barrel is gradually reduced so that the space of coal exit is increasing；High seam major diameter roller, Small section of depth so that the lift angle of helical blade is larger；At the same time, truncated cone shape roller to coal flow path to thrust component so that cutting The coal to get off can be shipped by helical blade in time.These combined factors make transporting coal flow unobstructed, and interior cycle is reduced, and coal is crushed Rate reduces, and lump coal rate is high, therefore it is smaller to generate coal dust amount.

Cutting for the coal mining machine roller is deep, i.e., the width of Shearer Helical Drum is 600mm, practical according to field application, Coalcutter cuts and mostly uses 600mm or 800mm deeply, and small section of deep coalcutter reduces exploitation and push up exposure with empty to the interference of coal wall Therefore product cuts deep roller using 600mm and is conducive to alleviate coal wall caving phenomenon.

After the complete top coal of front roll cutting of traditional coalcutter, an interim step can be formed, accumulation is easy on step Residual coal and coal cinder, when back roll, which again passes by, cuts ground coal, residual coal and coal mine on step moment can enter roller, Ke Nengzao It is blocked at roller, when serious, bulk falls damage equipment.And the coal mining machine roller of the utility model is not in then such existing As after coalcutter front roll cutting complete coal wall, an interim arc gradient can be formed, and residual coal and coal cinder are difficult in this heap Product, so as to avoid problem above.

1-11 below in conjunction with the accompanying drawings is illustrated below specific embodiment of the present utility model, it is clear that described Embodiment is only a part of the embodiment of the utility model, rather than whole embodiments, following embodiment are merely illustrative The utility model, but be not to limit the scope of the utility model.

As shown in Figure 1, Figure 2 and Figure 3, the utility model provides a kind of coal mining machine roller, and coal mining machine roller may include cylinder Body 1, the end plate 2 for being welded on 1 one end of cylinder while the helical blade 3 being welded on 1 outside of cylinder and end plate 2, further include pick 4 and toothholder 12.The helical blade 3 is segmented into two parts, the width of a part of helical blade width since end plate 2 Maximum value, the as divergent segment 5 of helical blade are progressively increased to, and the remaining part for keeping maximum width is known as isometrical section 6, institute Unitary design may be used with isometrical section 6 in the helical blade divergent segment 5 stated.The pick 4 is uniformly welded on 2 He of end plate On helical blade 3, the toothholder 12 can be connected in the plane of end plate 2 by welding manner, on the edge of end plate 2 and spiral shell On 3 edge of vane piece.The pick 4 being wherein located in 2 plane of end plate and edge respectively forms a circle, and axis is directed toward turning for roller Between being 20 °~60 ° to the angle at, the elevation angle, and between the angle for being biased to coal wall is 20 °~45 °；Positioned at 3 side of helical blade Pick 4 on edge, axis be directed toward roller steering, the elevation angle can be 20 °~60 ° between, and be biased to goaf direction angle Lift angle of the degree equal to helical blade 3.

As shown in Fig. 2, the envelope of the helical blade divergent segment 5 is circular arc, and isometrical section 6 of envelope is straight Line.The number of the helical blade 3 is two to four, and each helical blade shape is identical, and rotation direction is also identical.In this reality It applies in example when helical blade number is three, the size for enclosing cornerite of the helical blade 3 is related with the number of helical blade, The size that cornerite is enclosed in the present embodiment can be 150 °, and the cornerite that encloses of wherein divergent segment 5 is 120 °, and isometrical section 6 of the cornerite that encloses is 30°。

As shown in Figure 1, Figure 2 and Figure 3, the pick 4 can be pick-shaped cutter.In the present embodiment, each helical blade 3 On have seven picks, 12 picks 4 are evenly distributed on the cylinder edge of end plate 2, one is also evenly distributed in end plate plane Enclose pick 4, number be can be six, the direction of all picks 4 is all identical as roller steering, and is partial to coal wall side Can be between 30 °~60 ° to, the angle of the axis direction of pick 4 and the axis direction of cylinder.

As shown in figure 3, the position of first pick 13, the second pick 14, third pick 15 is successively rearward, therefore When cutting coal wall, position is as shown in figure 4, the first pick 13 cutting coal wall at first, followed by the second pick 14, finally It is third pick 15, forms cutting sequence from outside to inside.Due to constantly forming the new scope of freedom from outside to inside so that roller Specific energy consumption greatly reduce, but also slow down the abrasion that internal pick 4 is subject to.Due to the first pick 13 of coal mining machine roller Always coal cutting at first, when drum rotation speed is slower, 13 stress of the first pick is larger, may make toothholder weld cracking, such as Fig. 5 institutes Show, an intensive aspect 16 can be welded between helical blade 3 and toothholder 12, is conducive to prevent toothholder weld seam stress from reaching pole Limit, there is a phenomenon where be broken.

As shown in Fig. 6, Fig. 8 and Figure 10, in high seam top-coal caving face, coalcutter roller 9 in front cuts top coal, different 9 cutting coal wall 10 of roller it is different from the shape of top coal 11, after what Fig. 6 was indicated is traditional coal-cutting drum cutting, coal wall 10 and top 11 intersection of coal is right angle, Fig. 8 shows be coal wall 10 and 11 intersection of top coal only after the coal-cutting drum cutting comprising divergent segment An arc transition is formd, although reducing coal wall caving and end leaks the risk risked, due to depositing for apex angle Triangle Coal In so that hydraulic support 7 to after reach frame, top beam is no longer on original plane, cause later coal cutting recycle be difficult to after It is continuous, roller 9 is further added by upper isometrical section on this basis, as shown in Figure 10, not only ensures the advantage in Fig. 8 designs in this way, and And solves the problems, such as it.

As shown in Fig. 7, Fig. 9 and Figure 11, in high seam top-coal caving face, the subsequent roller of coalcutter 9 cuts ground coal, different The cutting coal wall 10 at bottom surface of roller 9 shape it is different, what Fig. 7 was indicated is coal wall 10 and bottom after traditional coal-cutting drum cutting Face intersection be right angle, Fig. 9 indicate is only comprising divergent segment coal-cutting drum cutting after, coal wall 10 is formed with bottom surface intersection One arc transition, however due to the presence of base angle Triangle Coal so that after drag conveyor 8 elapses forward, bottom is no longer In original plane, causes later coal cutting to recycle and be difficult to continue, on this basis, roller 9 is further added by upper isometrical section, such as Shown in Figure 11, the advantage in design not only ensure that in this way, and solve the problems, such as it.

It should be understood that multiple examples described above can along multiple directions (as tilted, reverse, horizontal, vertical, etc.) and It is utilized with multiple constructions, without departing from the principles of the present invention.Embodiment shown in the accompanying drawings is only used as the utility model Principle the example effectively applied and be shown and described, the utility model is not limited to these examples any specific Details.

Certainly, once thinking over the above description of representative embodiment, those skilled in the art are just it will be readily understood that can A variety of remodeling, addition, replacement, deletion and other variations are made to these specific embodiments, and these variations are in this reality In the range of novel principle.Therefore, the detailed description of front should be clearly understood that it is only with explanation and exemplary side Come what is provided, the spirit and scope of the utility model are only limited by the appended claims and its equivalent formula.

Although disclosing the utility model with reference to some embodiments, without departing substantially from the scope of the utility model and Under the premise of scope, a variety of variants and modifications can be carried out to the embodiment described.It will therefore be appreciated that the utility model is not It is confined to illustrated embodiment, protection domain should be limited by the content of appended claims and its structure and scheme of equivalence It is fixed.

Claims (10)

1. a kind of coal mining machine roller, including cylinder, end plate, two and more than two helical blades and multiple picks, feature It is, one end of the end plate and the cylinder is fixedly linked, and is located at the one end of the cylinder towards coal wall；

Each helical blade is along the circumferentially disposed of the cylinder, and the end of each helical blade and the end plate stationary phase Even；Each helical blade includes divergent segment and isometrical section, and the width of the divergent segment gradually increases since the end plate side Greatly, finally equal with isometrical section of the width；

The multiple pick interval is arranged on the end plate and each helical blade.

2. coal mining machine roller as described in claim 1, which is characterized in that the quantity of helical blade is two to four, each described Helical blade encloses cornerite and is greater than or equal to 210 °~140 °, and the quantity of the helical blade and the cornerite size of enclosing are in anti- Than.

3. coal mining machine roller as described in claim 1, which is characterized in that the helical blade number is two, the spiral The cornerite that encloses of blade is greater than or equal to 210 °；The helical blade number be three, the helical blade enclose cornerite be more than or Equal to 140 °；The helical blade number is four, and the cornerite that encloses of the helical blade is greater than or equal to 105 °.

4. coal mining machine roller as described in claim 1, which is characterized in that the envelope of the divergent segment is circular arc line, described Isometrical section of envelope is straight line.

5. coal mining machine roller as described in claim 1, which is characterized in that the straight line of the helical blade tail portion is leaf tail side Line, in terms of the direction of end plate, the pick against the leaf tail sideline is known as the first pick, and axial position rearward is to be located at other one A pick on a helical blade, referred to as the second pick, axial position is be located at the end plate edge one section rearward again Tooth, referred to as third pick determine multiple third picks by multiple leaf tail sidelines of multiple helical blades, and end plate edge remaining Pick be uniformly distributed between the third pick.

6. coal mining machine roller as claimed in claim 5, which is characterized in that the toothholder surrounding of first pick is provided with reinforcement Body.

7. coal mining machine roller as described in claim 1, which is characterized in that the multiple pick interval is distributed in the spiral On the edge of blade and end plate；The multiple pick is distributed in the flat of the end plate along the axis of the cylinder for center of circle interval On face.

8. coal mining machine roller as claimed in claim 7, which is characterized in that the axis direction of the multiple pick and the cylinder The angle of axis direction be 30 °~60 °.

9. claim 1-8 it is any as described in coal mining machine roller, which is characterized in that each pick is rotatably fixed In toothholder, self-sharpening in running.

10. a kind of coalcutter is equipped at least one coal mining machine roller as described in any one of claim 1 to 9.