CN105569701B - Suspension device is tunneled suitable for the step type that hard-rock tunnel is tunneled - Google Patents

Abstract

A kind of step type driving suspension device tunneled suitable for hard-rock tunnel, including tail unit, host groups, cutting units, block shutter arrangement and conveying device, host groups front end is provided with forestope, is characterized in that：The host groups include the secondary support group of the main support group of host groups and host groups being staggered from the front to the back：The main support group of host groups includes connecting plate I, support cylinder I, longeron I, back timber I, collateral backplate I；Host groups pair support group includes connecting plate II, support cylinder II, longeron II, back timber II；Tail unit includes the main support group of tail unit being staggered from the front to the back and the secondary support group of tail unit：The main support group of tail unit includes connecting plate III, support cylinder III, longeron III, back timber III, collateral backplate II；Tail unit pair support group includes connecting plate IV, support cylinder IV, longeron IV, back timber IV.The problems such as fundamentally solving poor existing development machine security, poor controllability, it has the advantages that equipment attrition is low, it is stable to advance.

Description

Stepping type tunneling support device suitable for tunneling in hard rock

technical field

The invention relates to the field of coal mine machinery, in particular to a step-type excavation supporting device suitable for excavation of hard rock roadways, which mainly completes the rapid advancement of roadway excavation operations by blasting.

Background technique

At present, there are mainly two methods for tunneling in hard rock roadways, one is to use a hard rock roadheader, and the other is to use blasting to complete. When cutting hard rock with a hard rock roadheader, the cutting head and equipment are severely damaged, and picks and other components often need to be replaced. In addition, after the cantilever roadheader cuts out a section of empty roof distance, the roof cannot be supported in time and effectively. It is usually necessary to withdraw the roadheader and use special bolter and other support equipment to permanently support the roof, thus affecting Drilling efficiency. When carrying out blasting operations, manual operations such as drilling and installing explosives are often carried out without good support on the roof, which poses a great potential safety hazard.

Existing comprehensive roadheader, such as the invention patent of CN102022122B disclosed "a kind of supporting type comprehensive roadheader" as the authorized announcement number, consists of crawlerless roadheader,

It consists of roadheader chassis, left and right hydraulic supports, drilling rig and scraper conveyor. The roadheader is installed on the roadheader chassis. Two pushing jacks are installed on the roadheading machine chassis. Connection, side pusher cylinders are installed on both sides of the chassis of the roadheader, a set of metal mesh storage devices are installed on the front probe beams of the left and right hydraulic supports, a drilling rig is hung at the tail of the main top beam of the support, and the first scraper conveyor The tail of the machine is installed on the shovel plate of the roadheader, the head of the machine is overlapped with the tail of the second scraper conveyor, and the head of the second scraper conveyor is overlapped with the tail of the belt transfer machine. sled. Though this technical scheme has the advantage of the drilling support and coal-cutting coal-cutting parallel operation of the roadheader, the labor intensity has been reduced to a certain extent, and the coal mining efficiency has been improved. However, it still has the following defects: when moving forward, it is divided into a left half support group and a right half support group. When the left half support group moves forward, the left half of the roadway roof is in an unsupported state. For soft rock The roadway is prone to roof instability, posing potential safety hazards. For hard rock roadways, blasting is usually the main method, and the cutting part is used for roadway modification, so it cannot be applied to hard rock roadways. The use of anchor chains to drive the whole machine backward cannot provide sufficient pulling force, and there are limitations in the backward operation. The reliability and controllability of the wire rope pulling process are poor.

Existing comprehensive tunneling machines, such as the invention patent application with the application publication number CN104500086A, discloses the "roadway unmanned anchor digging integrated machine", which mainly includes a tunneling system, a conveying system, a temporary support system, an anchoring system, and a tunneling integrated machine. system, sensing system, electrical control system. Among them, the dial roller at the connection between the shovel part in the excavation system and the front end of the conveying system can prevent material jamming at the front end of the shovel and the scraper conveyor. Though this technical scheme can be suitable for multiple roadway sections, and to a certain extent satisfies the tunneling support operation under different ground pressure conditions. However, it still has the following disadvantages: due to the use of several support plates as the roadway support mechanism, the instability of the roof is very prone to occur, and there are still potential safety hazards. Though adopting the running part of crawler mechanism can realize backward operation to a certain extent, as hard rock ground frictional force is low can cause crawler mechanism to advance or retreat extremely difficult. During the moving process of the crawler mechanism, the cutting position may deviate due to the difference in the running resistance of the left and right crawlers.

Contents of the invention

The purpose of the present invention is to provide a step-type tunneling support device suitable for tunneling in hard rock, which fundamentally solves the problems of poor safety, narrow application range, difficult retreat operation, and poor controllability of existing tunneling machines. It has the advantages of low equipment wear, stable travel, safe and reliable operation process, and easy control.

In order to achieve the above object, the present invention provides the following technical solutions: the step-type excavation support device suitable for hard rock roadway excavation includes a tail unit, a main unit, a cutting part, a blocking roller shutter assembly and a conveying device, and the front end of the main unit is equipped with There is a front probing beam, the technical point of which is: the main unit includes the main support group of the main unit and the auxiliary support group of the main unit arranged staggered from back to front:

The main supporting group of the main unit includes two horizontally arranged connecting plates I at the front and rear, two pairs of vertically supporting oil cylinders I respectively fixed on the two connecting plates I at the front and rear, and a pair of vertically arranged between the two supporting oil cylinders I at the front and rear. Longitudinal beams I, a pair of top beams I respectively located on the support cylinder I spanning between the longitudinal beams I, and side support plates I respectively hinged on the outside of the longitudinal beams I;

The auxiliary support group of the main unit includes two horizontally arranged connecting plates II at the front and rear, two pairs of vertically supporting oil cylinders II respectively fixed on the two front and rear connecting plates II, and a pair of vertically arranged between the two front and rear supporting oil cylinders II. Longitudinal beams II, a pair of top beams II respectively located on the support cylinder II spanning between the longitudinal beams II;

A pair of push cylinders I are arranged symmetrically between the connecting plate I at the front and the connecting plate II at the rear;

The cutting part comprises the support platform limited on the connecting plate 1, the pick-up machine turntable fixed on the support platform, the pick-up machine installed at the front end of the pick-up machine turntable, the base installed on the support platform, the pick-up machine installed on the base A horizontally rotatable cutting turntable, a cutting arm hinged on the cutting turntable, a cutting head installed at the front end of the cutting arm, and a drilling machine installed on the cutting arm;

The stern unit includes the main support group of the stern unit and the auxiliary support group of the stern unit, which are staggered from back to front:

The main support group of the stern unit includes two front and rear connecting plates III arranged horizontally, two pairs of vertical support cylinders III respectively fixed on the front and rear two connecting plates III, and a pair of vertical support cylinders III arranged between the front and rear two support cylinders III. Longitudinal beams III, a pair of top beams III respectively located on the support cylinder III spanning between the longitudinal beams III, and side support plates II respectively hinged on the outside of the longitudinal beams III;

The auxiliary support group of the stern unit includes two front and rear connecting plates IV arranged horizontally, two pairs of vertical support cylinders IV respectively fixed on the front and rear two connection plates IV, and a pair of vertical support cylinders IV arranged between the front and rear two support cylinders IV. Longitudinal beams IV, a pair of top beams IV respectively positioned on the support cylinder IV spanning between the longitudinal beams IV;

A pair of connecting oil cylinders are arranged symmetrically between the rear connecting plate I and the front connecting plate IV, between the front connecting plate III and the front connecting plate IV, and between the rear connecting plate III and the rear connecting plate IV A pair of push cylinders III are symmetrically arranged between them, and a pair of push cylinders II are symmetrically arranged between the connecting plate III at the front and the connecting plate IV at the rear;

A shielding roller blind assembly is installed on the supporting platform, and the shielding roller blind assembly includes a pair of angular shielding roller blind frames fixed on the supporting platform, a slide rail limited in the shielding roller blind frame, and a shielding roller blind frame installed on one side The drive motor on the top, the main pulley block and the secondary pulley block that are symmetrically installed on the outside of the shutter frame, the shutter board I and the shutter board II installed on the slide rail between the shutter shutter frames, and the shutter board I Occasionally, the roller shutter plates II or between the roller shutter plates I and II are connected through the roller blind connecting plate, and the main pulley block is arranged at the output end of the driving motor.

The conveying device includes a shovel hinged on the support platform arranged in sequence, a conveyor I connected to the output end of the shovel arranged in the main unit and a conveyor II arranged in the tail unit. In the gantry structure composed of I, II, top beams I, II, support cylinders I, II and connecting plates I, II, the conveyor II is located on the longitudinal beams III, IV, top beams III, IV and support cylinders III, IV and In the gantry structure composed of connecting plates III and IV.

A bolter is provided at the end of the tail unit.

Beneficial effects of the present invention: rapid excavation through alternating steps, so that roof beams I~IV are alternately used as force fulcrums, which can ensure that the roof is always supported in time and effectively, avoiding insufficient forward force caused by uneven ground in the roadway. and backward movement, the movement is more stable, avoiding the problems of traditional hard rock excavation methods such as large equipment loss, low excavation efficiency, and large safety hazards. The entire tunneling mechanism can be supported only by the support force of the top beam and the vertical direction of the connecting plate (no waste of oblique moment), omitting the side support structure, simplifying the control process, and effectively reducing the failure rate. The rapid advancement of roadway excavation is mainly completed by blasting, and the cutting part is used to repair the roof connecting plate and side rail. Move to the designated working position by alternating steps. After the coal wall is trimmed by the cutting part, the coal block of the loader is picked up on the shovel plate, and the coal block is sent out through the conveyor I and conveyor II in turn, and can pass through the cutting part. Repair the top connecting plate and side trim. The top beam, longitudinal beam and a pair of supporting cylinders form an arched gantry structure, which can make full use of the space and facilitate the installation and use of electrical equipment such as conveying devices. Both the main unit and the tail unit are equipped with side supports, which can support the side walls of the roadway, and at the same time, the side supports can ensure that the units are more stable during the excavation process. The side support plate effectively ensures the stable operation of the support cylinder. It plays a positive role in realizing the development of complete sets of unmanned excavation equipment in coal mines, and can effectively reduce the intensity of coal miners' excavation work. The front probe beam is fixed to the auxiliary support group of the main unit, which can provide effective temporary support for the front end roof of the roadway, provide protection for workers and equipment working under the front end roof of the roadway, and improve the efficiency of underground excavation and the safety of excavation operations. In addition, support equipment such as rod bolters at the stern can provide permanent support for the roof and sides.

Description of drawings

Fig. 1 is the isometric side view structural representation of the present invention;

Fig. 2 is the schematic diagram of the isometric side view structure of the sub-support group of the main unit of the present invention;

Fig. 3 is a schematic diagram of the isometric side view of the main support group of the main unit of the present invention;

Fig. 4 is a schematic diagram of the isometric side view of the cutting portion of the present invention;

Fig. 5 is the schematic diagram of the isometric side view structure of the tail unit of the present invention;

Fig. 6 is a schematic diagram of the isometric side view of the roller blind of the present invention;

Fig. 7 is a schematic diagram of one of the alternate steps of the present invention.

Explanation of reference signs:

In Fig. 1: 1 main unit auxiliary support group, 2 main unit main support group, 3 tail unit, 4 cutting part, 5 conveyor II, 6 connection cylinder, 7 push cylinder I, 11 support cylinder II, 12 connecting plate II , 13 Longitudinal Beam II, 14 Top Beam II, 21 Support Oil Cylinder I, 22 Connecting Plate I, 23 Longitudinal Beam I, 24 Top Beam I, 31 Auxiliary Support Group of Tail Unit, 32 Main Support Group of Tail Unit, 33 Side Support Plate II;

In Fig. 2: 11 supporting oil cylinder II, 12 connecting plate II, 13 longitudinal beam II, 14 roof beam II, 15 shovel plate, 16 conveyor I, 17 front probe beam;

Among Fig. 3: 20 blocks rolling shutter assembly, 21 support oil cylinder 1, 22 connecting plate 1, 23 longitudinal beam 1, 24 top beam 1, 25 pick up machine turntable, 26 support platform, 27 support platform fixed part, 28 pick up machine, 29 side support plate I;

Among Fig. 4: 41 bases, 42 cutting turrets, 43 cutting arms, 44 drilling machines, 45 cutting heads;

Among Fig. 5: 6 connecting oil cylinders, 33 side support plates II, 311 supporting oil cylinders IV, 312 connecting plates IV, 313 longitudinal beams IV, 314 top beams IV, 315 pushing oil cylinders III, 321 supporting oil cylinders III, 322 connecting plates III, 323 Longitudinal Beam III, 324 Top Beam III, 325 Push Cylinder II;

Among Fig. 6: 201 blocks shutter frame, 202 slide rails, 203 main pulley blocks, 204 auxiliary pulley blocks, 205 drive motors, 206 shutter plates I, 207 shutter plates II, 208 shutter connecting plates.

detailed description

The content of the present invention will be described in detail through specific embodiments below in conjunction with FIGS. 1 to 7 . The walking-type excavation support device suitable for tunneling in hard rock includes a tail unit 3, a main unit, a cutting unit 4, a shutter assembly and a conveying device. Among them, the main unit includes the main support group 2 of the main unit and the auxiliary support group 1 of the main unit, which are arranged staggered from back to front:

The main support group of the main unit includes two horizontally arranged connecting plates I22 at the front and rear, two pairs of vertically supporting oil cylinders I21 respectively fixed on the two connecting plates I at the front and rear, and a pair of vertically arranged between the two supporting oil cylinders I at the front and rear. The longitudinal beam I 23 between the longitudinal beams 1, a pair of top beams I 24 respectively located on the support cylinder 1 spanning between the longitudinal beams I, and the side support plates I 29 respectively hinged on the outer sides of the longitudinal beams I 23.

The auxiliary support group of the main unit includes two horizontally arranged connecting plates II 12 at the front and rear, two pairs of vertically supporting oil cylinders II respectively fixed on the two connecting plates II at the front and rear, and a pair of two supporting oil cylinders II 11 vertically arranged at the front and rear. The longitudinal beam II 13 between them, and a pair of top beam II 14 respectively located on the support cylinder II spanning between the longitudinal beams II.

A pair of moving cylinders I 7 are symmetrically arranged between the connecting plate I at the front and the connecting plate II at the rear.

The cutting part comprises a support platform 26 limited on the connecting plate 122 (fixed on the support oil cylinder I 21 by the support platform fixing part 27), a pick-up loader turntable 25 fixed on the support platform, and rotatably installed on the pick-up platform. The pick-up machine 28 at the front end of the machine turntable, the base 41 installed on the support platform that can slide along the cross-shaped track, the horizontally rotatable cutting turntable 42 installed on the base, the cutting turntable hinged on the cutting turntable. Cutting arm 43, the cutting head 45 that is installed on the cutting arm front end and the drilling machine 44 that is installed on the cutting arm (can stretch out when needs drilling).

The front probe beam 17 is fixed on the connecting plate II 12 by a vertical column, and is connected with the roof beam 14 .

The stern unit includes the main support group 32 of the stern unit and the auxiliary support group 31 of the stern unit, which are staggered from back to front:

The main support group of the stern unit includes two front and rear connecting plates III 322 arranged horizontally, two pairs of vertical support oil cylinders III 321 respectively fixed on the front and rear two connecting plates III, a pair of vertical support oil cylinders III 321 arranged vertically between the front and rear two support oil cylinders III The longitudinal beams III 323 between them, a pair of top beams III 324 straddling between the longitudinal beams III, respectively located on the support cylinder III, and side support plates II 33 respectively hinged on the outer sides of the longitudinal beams III 323.

The auxiliary support group of the stern unit includes two horizontally arranged connecting plates IV 312 at the front and rear, two pairs of vertically supporting cylinders IV 311 respectively fixed on the two connecting plates IV at the front and rear, and a pair of vertically arranged two supporting cylinders IV at the front and rear. A pair of longitudinal beams IV 313 between the longitudinal beams IV and a pair of top beams IV 314 respectively located on the support cylinder IV.

A pair of connecting cylinders 6 are arranged symmetrically between the rear connecting plate I and the front connecting plate IV, the front connecting plate III and the front connecting plate IV, the rear connecting plate III and the rear connecting plate IV A pair of push cylinders III 315 are arranged symmetrically therebetween, and a pair of push cylinders II 325 are symmetrically arranged between the connecting plate III at the front and the connecting plate IV at the rear.

The block roller blind assembly is installed on the support platform, and the block roller blind assembly 20 includes a pair of angular block roller blind frames 201 fixed on the support platform 26, a slide rail 202 (one end of the slide rail 202 ) limited in the block shutter frame. Fixed with blocking roller blind frame 201, bottom surface is fixed on the longitudinal beam 123), drive motor 205 that is installed on wherein one side shields roller blind frame, main pulley block 203 and auxiliary pulley block 204 that are respectively symmetrically installed in blocking roller blind frame outside (the main pulley block can slide on the slide rail 202, and the output ends of the main pulley block 203 are respectively connected with the secondary pulley block 204 and the rolling shutter plate I 206, thereby driving the rolling shutter plate I206 and the rolling shutter plate II 207 up and down), installed on the slide rail The roller shutter plate I 206 and the roller shutter plate II 207 located between the shutter frames are connected by the roller shutter connecting plate 208 between the roller shutter plates I 206 or between the roller shutter versions II or between the roller shutter versions I and II, The roller shutter plate II 207 is located at the very end of the entire roller shutter assembly. The area of a single roller shutter plate II 207 is smaller than that of the roller shutter plate I206, and it is set in the middle of both sides to reserve the installation space for the cutting part and the installation machine, effectively avoiding the rolling Interfere with the pick-up machine 28 when the curtain is put down. The main pulley block is connected with the output end of the driving motor through a coupling.

The conveying device includes shovel plates 15 arranged sequentially and hinged on the support platform (the shovel plates 15 are fixed on the vertical plates between the uprights for installing the front probe beam 17, and the vertical plates are perpendicular to the connecting plate II 12), arranged on The conveyor I 16 connected to the output end of the shovel in the main unit (conveyor I 16 is fixed on the connecting plate II 12) and the conveyor II 5 arranged in the tail unit. In the gantry structure composed of top beams I, II, supporting cylinders I, II and connecting plates I, II, conveyor II is located on the longitudinal beams III, IV, top beams III, IV, supporting cylinders III, IV and connecting plates III, Inside the gantry structure formed by IV.

A bolter (not shown in the figure) is provided at the end of the stern unit.

How alternate strides work:

1. The process of the host group moving:

Step 1) The support cylinder II 11 descends, driving the longitudinal beam II 13 and the top beam II 14 to descend, and after the top beam II 14 descends, it separates from the supported top plate and overlaps the longitudinal beam I 23 .

Step 2) Push cylinder I 7 to retract, drive two connecting plates II 12, connecting plate II 12 drives supporting cylinder II 11, longitudinal beam II 13, top beam II 14, shovel plate 15 and conveyor I 16 to advance one step (about 500mm) and then stop.

Step 3) The support cylinder II 11 rises, driving the longitudinal beam II 13 and the top beam II 14 to rise, and the top beam II 14 breaks away from the main support group longitudinal beam (longitudinal beam I 23), reaches the supported roof until the supporting pressure meets the requirements, and the main engine The sub-support group 1 completes a step forward process.

Step 4) The support cylinder I 11 descends, driving the longitudinal beam I 23 and the top beam I 24 to descend, and after the top beam I 24 descends, it separates from the supported top plate and overlaps the longitudinal beam II 13. Side support guard plate 1 29 shrinks, stops the support to roadway side.

Step 5) Push cylinder I7 out, drive two connecting plates I 22, connecting plate I 22 drives supporting oil cylinder I 21, longitudinal beam I23, top beam I 24, supporting platform 26 and side support plate I 29 to advance one step Stop after distance (about 500mm).

Step 6) The support cylinder I 21 rises, driving the longitudinal beam I 23 and the top beam I 24 to rise, and the top beam I 24 breaks away from the secondary support group longitudinal beam (longitudinal beam II 13) and reaches the supported roof until the supporting pressure meets the requirements. The support plate I 29 is stretched out to complete the support to the side of the roadway. The main supporting group 2 of the main unit completes a step forward process.

2. The stepping process of the tail unit:

Step 1) The support cylinder IV 311 descends, driving the longitudinal beam IV 313 and the top beam IV 314 to descend. After the top beam IV 314 descends, it separates from the supported top plate and overlaps the longitudinal beam III 323 .

Step 2) The connection cylinder 6 and the push cylinder II 325 are retracted, and the two pairs of push cylinders III 315 are extended to drive two connecting plates IV 312, which drive the support cylinder I 311, the longitudinal beam IV 313 and the top beam IV 314 Wait for one step forward (about 500mm) and then stop.

Step 3) The support cylinder I 311 rises, driving the longitudinal beam IV 313 and the roof beam IV 314 to rise, and the roof beam IV 314 breaks away from the main support group stringer (longeron III 323), and reaches the supported roof until the support pressure meets the requirements. The auxiliary support group 31 of the unit completes a step forward process.

Step 4) The support cylinder III 321 descends, driving the longitudinal beam III 323 and the top beam III 324 to descend. After the top beam III 324 descends, it breaks away from the supported top plate and overlaps the longitudinal beam IV 313, and the side support plate II 33 shrinks. Stop supporting the roadway sides.

Step 5) The connecting cylinder 6 and the pushing cylinder II 325 are stretched out, and the two pairs of pushing cylinders III 315 are retracted, driving two connecting plates III 322, and the connecting plate III 322 drives the supporting cylinder III 321, the longitudinal beam III 323, and the top beam III 324 And the side support plate II 33 etc. advance one step distance (about 500mm) and then stop.

Step 6) The support cylinder III 321 rises, driving the longitudinal beam III 323 and the top beam III 324 to rise, the top beam III 324 breaks away from the auxiliary support group longitudinal beam (longitudinal beam IV 313), reaches the supported roof until the supporting pressure meets the requirements, and the side support The guard plate II33 is stretched out to complete the support to the side of the roadway, and the main support group 32 of the tail unit completes a step forward process.

Among them, in terms of control, the main unit drive is only provided with a pair of push cylinders I 7, and the tail unit drive adopts a pair of push cylinders II 325 and two pairs of push cylinders III 315, and the push cylinder II 325 is located between the two pairs of push cylinders III 315. Push cylinder I 7, connecting cylinder 6, and push cylinder II 325 can be retracted or extended sequentially at intervals (set according to actual parameters), or retracted or extended at the same time (the movement process shown in Figure 7 ). Normally, when the push cylinder I 7, the connecting cylinder 6, and the push cylinder II 325 are in the extended state, the push cylinder III 315 is in the retracted state, and the push cylinder I 7, the connected cylinder 6, and the push cylinder II 325 are in the retracted state At this time, the pushing oil cylinder III 315 is stretched out, which ensures the alternate stepping of the tunneling system.

3. Hard rock roadway cutting process:

Step 1) Push the base 41 out of the main unit on the support platform 26, and simultaneously drive the cutting rotary table 42, the cutting arm 43, the drilling machine 44 and the cutting head 45 to move forward.

Step 2) The two cutting arms 43 drive the drilling machine 44 to drill the blast hole on the cross-section of the roadway. After the drilling and drilling of the blast hole is completed, the two cutting arms 43 are pulled back on the support platform 26 to Inside the host unit, explosives are placed manually.

Step 3) Drive the motor to drive the shutter plates I and II to fall, and isolate the equipment and personnel at the rear from the section of the roadway, so as to prevent personnel and equipment from being injured by coal and rocks that collapse during excavation. After the safety and blasting work is ready, the blasting operation will be implemented. After the gun excavation operation is completed, the shutter 20 is raised, and the two cutting arms 43 are released on the support platform 26, and the top connecting plate and the side rail are repaired by the cutting head 45 . The coal rock of caving and cutting is picked up on the shovel plate 15 by the pick-up machine 28, and the coal rock is transported away by the conveyor I 16 and the conveyor II 5. The rock bolter (not shown in the figure) installed in the tail unit 3 can permanently support the roadway top and side bolting at the rear. After the step-type excavation support device completes the excavation work of one step, it moves forward according to the above-mentioned step process.

Claims (3)

1. a kind of step type driving suspension device tunneled suitable for hard-rock tunnel, including tail unit, host groups, cutting units, screening Shutter arrangement and conveying device are kept off, host groups front end is provided with forestope, it is characterised in that：The host groups are included from the front to the back The secondary support group of the main support group of host groups and host groups being staggered：

The main support group of host groups include the front and rear two pieces connecting plate I laterally set, be separately fixed at it is vertical on front and rear two pieces of connecting plate I Two couples of support cylinder I in direction, the longeron I being disposed longitudinally on for a pair between former and later two support cylinders I, across longeron I it Between the back timber I, the collateral backplate I that is respectively hinged on the outside of longeron I that are located at respectively on support cylinder I for a pair；

The secondary support group of host groups includes the front and rear two pieces connecting plate II laterally set, is separately fixed at erecting on front and rear two pieces of connecting plate II Nogata to two couples of support cylinder II, be disposed longitudinally on for a pair between former and later two support cylinders II longeron II, across vertical A pair of back timber II respectively on support cylinder II between beam II；

A pair of passage oil cylinder I are arranged between anterior connecting plate I and the connecting plate II at rear portion；

Cutting units includes spacing support platform on connecting plate I, the drive hoeing machine panoramic table being fixed in support platform, installed in taking off Drive hoeing machine, the base in support platform, the cut horizontally rotated on base of installation panoramic table front end Panoramic table, the cutting arm being hinged on cut panoramic table, the cutterhead installed in cutting arm front end and on cutting arm Drilling machine；

Tail unit includes the main support group of tail unit being staggered from the front to the back and the secondary support group of tail unit：

The main support group of tail unit includes the front and rear two pieces connecting plate III laterally set, is separately fixed on front and rear two pieces of connecting plate III Two couples of support cylinder III of vertical direction, the longeron III being disposed longitudinally on for a pair between former and later two support cylinders III, across The back timber III that a pair between longeron III is located at respectively on support cylinder III, be respectively hinged at it is collateral on the outside of longeron III Backplate II；

The secondary support group of tail unit includes the front and rear two pieces connecting plate IV laterally set, is separately fixed at erecting on front and rear two pieces of connecting plate IV Nogata to two couples of support cylinder IV, be disposed longitudinally on for a pair between former and later two support cylinders IV longeron IV, across vertical A pair of back timber IV respectively on support cylinder IV between beam IV；

A pair of connection oil cylinders, anterior connecting plate III and anterior company are arranged between the connecting plate I at rear portion and the connecting plate IV of front portion Respectively symmetrically provided with a pair of passage oil cylinders III, anterior connecting plate III between plate IV, the connecting plate III at rear portion and rear portion connecting plate IV A pair of passage oil cylinder II are arranged between the connecting plate IV at rear portion；

It is provided with support platform and blocks shutter arrangement, blocks the angular screening that shutter arrangement includes a pair and is fixed in support platform Gear roller shutter framework, it is spacing block the slide rail in roller shutter framework, side installed therein block motor on roller shutter framework, Respectively symmetrically being located at installed in the head pulley group and auxiliary pulley group blocked on the outside of roller shutter framework, on slide rail blocks roller shutter Pass through volume between rolling slat I and rolling slat II between framework, rolling slat I or between roller shutter version II or between roller shutter version I and II Curtain connecting plate is connected, and head pulley group is arranged on the output end of motor.

2. the step type driving suspension device according to claim 1 tunneled suitable for hard-rock tunnel, it is characterised in that：Institute The shovel board being hinged in support platform that conveying device includes setting gradually is stated, is arranged in host groups and is connected with shovel board output end Conveyer I and the conveyer II that is arranged in tail unit, conveyer I be located at by longeron I, II and back timber I, II and support cylinder In the gantry structure that I, II and connecting plate I, II are constituted, conveyer II is located at by longeron III, IV and back timber III, IV and support cylinder In the gantry structure that III, IV and connecting plate III, IV are constituted.

3. the step type driving suspension device according to claim 1 tunneled suitable for hard-rock tunnel, it is characterised in that：Institute Tail machine group end is stated provided with jumbolter.