CN101845958B - Fully mechanized coal face bracket withdrawing method and bracket traction puller for withdrawing - Google Patents
Fully mechanized coal face bracket withdrawing method and bracket traction puller for withdrawing Download PDFInfo
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- CN101845958B CN101845958B CN201010197674A CN201010197674A CN101845958B CN 101845958 B CN101845958 B CN 101845958B CN 201010197674 A CN201010197674 A CN 201010197674A CN 201010197674 A CN201010197674 A CN 201010197674A CN 101845958 B CN101845958 B CN 101845958B
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Abstract
The invention relates to a fully mechanized coal face bracket withdrawing method and a withdrawing bracket traction spring exerciser, in particular to a process for withdrawing a bracket after the backstoping of a working face is finished in a mine, and the traction spring exerciser used in the withdrawing process. The traction spring exerciser comprises a section of beam fixed with a traction pulley, wherein the middle part of the beam is provided with a tie beam which is vertical to and fixedly connected with the beam; the other end of the tie beam is fixedly connected with a short beam; the short beam is parallel to the beam and forms a door shape with the beam and the tie beam; a width at an opening of the door shape is matched with a base of a hydraulic bracket; and a position, matched with a pin hole on a cylinder lever head part of a traction cylinder of the hydraulic bracket, on the middle part of the tie beam is provided with the pin hole. In the fully mechanized coal face bracket withdrawing method, the traction spring exerciser is utilized, and a cylinder lever of the traction cylinder which cannot be subjected to a radial force originally is used for transversely pulling the hydraulic bracket, so the whole withdrawing process is very simple, manpower and materials are saved and withdrawing security is ensured.
Description
Technical field
The present invention relates to a kind of fully-mechanized mining working rack restoring method and use the support traction spring exerciser with returning to remove, be in a kind of mine after working face extraction end with the process of rack restoring with remove the traction spring exerciser that uses in the process said time.
Background technology
Combine and to adopt after back production finishes, all devices on the work plane, according to: precedences such as coal-winning machine, scratch board conveyor, support are withdrawn work plane.Because support is to withdraw at last, so danger is bigger.Particularly because work plane is narrow, support is moved on to the return channel from the position of arranging, be commonly referred to the extraction support, danger is bigger, because the consideration of safety has also increased the difficulty of withdrawing.In working face equipment was withdrawn from, withdrawing from of support was to influence the key link that working face equipment is withdrawn from progress and safety.Past adopt to be given birth to the mode of resisting stubbornly of drawing, after be employed in and beat anchor pole on the rib, establish the mode of hauling block, but all undesirable.The mode that adopts now is to utilize the evacuation method of the support of tail as shield support.Process roughly is: the fully-mechanized mining working support returns in order to heading from tail and removes, and with the support called after 1# of tail, remaining stents is arranged as 2# by the order of tail to head, 3# usually ... Or the like.The order of withdrawing of support also is to be begun by the 1# support, then 2#, 3# ..., withdraw in order.Support is withdrawn beginning, at first, between 1# support and the coal group with 1 * 0.5m between array pitch add and beat individual prop, regain face guard and fall the back timber of 1# support, and on the rib of the passing cylinder relative position of 1# support, beat anchor pole, fix a hauling block.The hauling block of fixing on the steel wire penetrating rib on the double-speed winch that settle at work plane head position; Bolt is in the pin hole of the passing cylinder club head of 1# support; Double-speed winch twist wire rope is drawn to the 1# support in the return channel, is adjusted to be parallel to the non-group of adopting of return channel and to rise bridge joint behind the rib and push up, and returns the shield support of removing as remaining stents; After this, remaining stents utilizes winch and 1# shield support to pull out in order.The mode of pulling out is: on the cantilever extension of 1# support or face guard, hauling block is installed.Wire rope on the double-speed winch of work plane head position is worn on cantilever extension or the face guard of 1# support hauling block is installed; Fasten in the head pin hole of the passing cylinder bar of preparing to pull out support, double-speed winch twist wire rope is with 2#, 3# ... Extract out successively on support.Whenever pulling out a support in time cooperates timber cap to carry out temporary lining with hydraulic single prop.Along with withdrawing from of remaining stents, constantly move forward as the 1# frame of shield support, in time return simultaneously and remove the individual prop of these support both sides.Total 3～4 row's monomer supporting roofs that keep in the rack restoring zone are for removing the frame space for the creativity.Need if necessary to beat post in an opposite direction (or grillage is beaten in the space of support after withdrawing from) to the goaf, prevent broken spoil pour in back evacuate between, influence rack restoring.The support of pulling out utilizes the entrucking of matching with winch loading platform, gets into transportation system, is transported to work plane.
The 1# support has played the effect of supporting when removing owing to return, and above-mentioned technology is all beaten anchor pole when extracting each support out and worried and draw pulley safety on corresponding rib, saved the hydraulic prop in supporting goaf and the supporting of grillage, has practiced thrift timber and manpower.But the shortcoming of this technology also is tangible.Because hauling block is installed on the cantilever extension or face guard of hydraulic support, the position is very high.Because pulley is hung in eminence, return removing supporters and receive forward to the pulling force of top, stress condition is relatively poor, and weight support frame 22t upwards draws support to break wire rope easily.Must beat on time removing supporters, to cooperate with monomer support is accessed.During the monomer ceiling hold, there is big potential safety hazard in the people, the monomer well damage in closely operation.There is big potential safety hazard in this time removing supporters mode, consumes lot of materials, wastes time and energy, and is long in time limit.
Summary of the invention
For solving the prior art problem; The present invention proposes a kind of fully-mechanized mining working rack restoring method and uses the support traction spring exerciser with returning to remove; Said method is through the rack restoring traction spring exerciser, through the structure of h type, with not bearing the mounting points of the cylinder rod of radial pull as chest expander originally; Reasonably dissipation of ferees is carried out returning of support easily and is removed.
The objective of the invention is to realize like this: a kind of fully-mechanized mining working rack restoring method; The equipment that said method is used comprises: individual prop, anchor pole, hauling block, double-speed winch, traction spring exerciser, and said traction spring exerciser comprises: one section crossbeam that is fixed with hauling block is characterized in that; The middle part of said crossbeam have one with the tie-beam that is fixedly connected with crossbeam of beam vertical; The other end of said tie-beam is fixedly connected with a short beam, and said short beam is parallel with crossbeam, and forms the door font with crossbeam, tie-beam; The width of the opening part of said door font conforms to the base of hydraulic support; There is a pin hole at the middle part of said tie-beam with the position that the pin hole of the cylinder club head of the passing cylinder of hydraulic support conforms to, and said method is carried out the fully-mechanized mining working rack restoring according to following sequence of steps:
Set up the step of protection: be used between tail support and coal group, adding dozen individual prop with array pitch between certain; Guarantee roof safety; Simultaneously along with the withdrawing from of tail support, can beat monomer in the space of withdrawing from or grillage connects the top, extract the top, back out and cave in to prevent the tail support;
Step at installation hauling block on the rib: be used on the relative rib of the passing cylinder of tail support, beating anchor pole, hauling block is installed on anchor pole;
Step through the hauling block reeve on the anchor pole: be used for the haulage cable on the double-speed winch is passed hauling block bolt on the anchor pole is passed the cylinder club head of cylinder on the tail support pin hole;
The step that the tail support is extracted out: utilize double-speed winch to be drawn out to return channel after being used for the tail support fallen through the hauling block on the rib anchor pole;
The tail support transfer to step: be used for utilizing individual prop and double-speed winch to turn to 90 degree on the tail support of extracting out, be adjusted to and be parallel to the return channel coal and help;
Adjust the tail backing positions and rise the step on top: be used for adjusting the position that accent tail backward rises frame; Make said support the passing cylinder cylinder club head and the passing cylinder of having extracted the adjacent support that will extract out of support out point-blank and connect the top, as the shielding of extracting next support out;
The step of traction spring exerciser is installed: be used for the traction spring exerciser that has hauling block being installed at the pin hole of the cylinder club head of the passing cylinder of tail support on the tail support;
Step through the hauling block reeve on the traction spring exerciser: be used for the haulage cable on the double-speed winch is passed hauling block bolt on the traction spring exerciser at the pin hole that will withdraw support on the cylinder club head of passing cylinder adjacent with withdrawing from support;
The step that the support of having fastened wire rope is extracted out: utilize double-speed winch to be drawn out to return channel after being used for the support of fastening with wire rope fallen through the hauling block of the traction spring exerciser on the tail support;
Be drawn out of support transfer to step: be used for utilizing individual prop and double-speed winch to turn to 90 degree on the support of extracting out, be adjusted to and be parallel to the return channel coal and help;
Pull out the step of return channel with being drawn out of support: be used for the wire rope of double-speed winch is fastened the pin hole at the cylinder club head of the passing cylinder that is drawn out of support, will be drawn out of support with double-speed winch and pull out in return channel to the haulage gate and transport;
Repeat in order: adjustment tail backing positions and rise the step on top, the step of traction spring exerciser be installed on the tail support, the step through the hauling block reeve on the traction spring exerciser, will fasten step that the support of wire rope extracts out, be drawn out of support transfer to step, will be drawn out of the step that support is pulled out return channel; Successively the support of tail to head is extracted out and returned and withdraw haulage gate to and transport.
A kind of fully-mechanized mining working rack restoring is used the support traction spring exerciser; Comprise: one section crossbeam that is fixed with hauling block; The middle part of said crossbeam have one with the tie-beam that is fixedly connected with crossbeam of beam vertical; The other end of said tie-beam is fixedly connected with a short beam, and said short beam is parallel with crossbeam, and forms the door font with crossbeam, tie-beam; The width of the opening part of said door font conforms to the base of hydraulic support, and there is a pin hole at the middle part of said tie-beam with the position that the pin hole of the cylinder club head of the passing cylinder of hydraulic support conforms to.
The beneficial effect that the present invention produces is: the present invention utilizes a traction spring exerciser cleverly; The cylinder bar of the passing cylinder that can not receive radial pull originally is used for horizontal pulling hydraulic support; Make become very simple of whole time process of removing, saved manpower and materials, guaranteed the safety of time removing.Through on-the-spot actual measuring and calculating, certain ore deposit is adopted former technology to return and is removed 24 supports, consume 33 of monomers, 17 cubes of timber, and wire rope 700m, and 2 of slight wounds take place.Adopt the present invention, use the support traction spring exerciser to return and remove 69 supports, save man-hour 40%, by 21 cubes of 69 computational savings timber, save wire rope 400m, monomer only consumes 11.Realized removing zero defects safe time.Facts have proved the practicality of support traction spring exerciser, guaranteed that safe and efficient time of work plane removed.Return to remove for the installation in other colliery and have great application value.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is the sketch map that support is withdrawn;
Fig. 2 is the traction sketch map of wire rope in the technical scheme of existing rack restoring;
Fig. 3 is a pull of steel wire sketch map in the technical scheme of existing rack restoring;
Fig. 4 is the sketch map of the embodiment of the invention one said rack restoring method;
Fig. 5 is the structural representations of the embodiment of the invention two said rack restorings with the support traction spring exerciser;
Fig. 6 is the stressing conditions sketch mapes of the embodiment of the invention two said rack restorings with the support traction spring exerciser.
The specific embodiment
Embodiment one:
Fig. 1 is the sketch map of fully-mechanized mining working rack restoring.Figure middle orbit crossheading 1 forms former combining with return channel 7 and haulage gate 9 and adopts passage; Return channel wherein is former fully-mechanized mining working; Because this work plane is mined and accomplished, cutting back, coal seam is goaf 2, and the position that can not continue again to cut is for stopping adopting line coal group 3; Support is erected at a side of withdrawing passage side by side before withdrawing, 6 is that support is withdrawn position before among Fig. 1.For guaranteeing safety, each support also will connect the top before withdrawing, only take turns to when withdrawing and just fall.Also to use hydraulic prop 4 supporting around this support before falling, prevent to cave in.Utilize double-speed winch 10 support to be extracted and transferred in forming Fig. 1 out 5 position after falling.Be pulled to haulage gate by double-speed winch then, transport by transport vehicle again.What present embodiment mainly solved is the problem that support is extracted out by the position before withdrawing.Need use hauling block to make the wire rope 8 of double-speed winch change direction during extraction, by change the vertical passage of withdrawing into withdrawing channel parallel.Existing technical scheme be with hauling block 501 be installed in one got into withdraw in the passage and accomplish transfer to the face guard or cantilever extension of support on (support shown in 5 among Fig. 1).Said got into withdraw in the passage and accomplish transfer to the tail support that normally at first is drawn out of of support.This tail support is transferred will rise backward to push up and is fixed, and so both can become the permanent position of hauling block, can play the effect of shield support again, kills two birds with one stone.
The problem of existing rack restoring technical scheme is: the position of returning hauling block when removing is too high.Hauling block is installed on the face guard or cantilever extension of tail support, and the high hauling block of the steel wire penetrating of double-speed winch is fastened in the pin hole of the cylinder club head 601 of the passing cylinder 12 that is pulled support.The moving towards of wire rope forms: low-Gao-low form, as shown in Figure 2.Wire rope also has a pulling force that makes progress, shown in arrow A among Fig. 2 except that the pulling force that a pulling support is arranged.Therefore, the wire rope of pulling support not only will bear the resistance between support and the ground, also will bear the gravity of a part of support itself; Distance between two supports is near more; The support gravity that wire rope bore is big more, if the insufficient strength of selection of steel, then fracture especially easily at this moment.
For overcoming prior art problems; Present embodiment is a kind of fully-mechanized mining working rack restoring method; Its main thought is that hauling block and double-speed winch, the cylinder club head that is pulled the passing cylinder of support are installed on the plane, eliminates the pulling force that the wire rope commitment makes progress fully outward, only bears the frictional resistance that overcomes a support motion; Making wire rope stressed in whole distraction procedure is uniformly, can not rupture because of the increase of load.For realizing this thinking; The traction spring exerciser 11 that present embodiment will have a hauling block is installed in the pin hole of cylinder club head of passing cylinder of tail support; Make hauling block and double-speed winch, be drawn out of support the passing cylinder the cylinder club head in one plane; As shown in Figure 4, make wire rope stressed evenly.
The equipment that the said method of present embodiment is used comprises: individual prop, anchor pole, hauling block, double-speed winch, traction spring exerciser.Double-speed winch or to be called winch be a kind of hoist engine that can speed change.Traction spring exerciser is a special-purpose instrument of the said method of present embodiment.Have pulley, can be installed in easily in the pin hole of cylinder club head of passing oil cylinder of tail support.
The step of the said method of present embodiment is following:
Set up the step of protection: be used between tail support and coal group, adding dozen individual prop with array pitch between certain; Guarantee roof safety; While can be played the support of monomer or grillage in the space of withdrawing from and connect the top along with the tail support is withdrawn from, and extracts the top, back out and caves in to prevent the tail support.Setting up protection is the work that often needs in the mine, for safety, whenever all will note the serious consequence that the top caves in and causes, and this step should be moved in the procedure process of back at any time, prevents any accident.
Step at installation hauling block on the rib: be used on the relative rib of the passing cylinder of tail support, beating anchor pole, hauling block is installed on anchor pole.This is to adopt on group's rib big anchor pole hauling block is installed non-, so the height and position of pulley must be with double-speed winch and by the cylinder club head of the passing cylinder of tail support in one plane, and the pulling effect of generation is best like this.
Step through the hauling block reeve on the anchor pole: be used for the haulage cable on the double-speed winch is passed hauling block bolt on the anchor pole is passed the cylinder club head of cylinder on the tail support pin hole.
The step that the tail support is extracted out: utilize double-speed winch to be drawn out to return channel after being used for the tail support fallen through the hauling block on the rib anchor pole.
The tail support transfer to step: be used for utilizing individual prop and double-speed winch to turn to 90 degree on the tail support of extracting out, be adjusted to and be parallel to the return channel coal and help.
Step afterwards is the committed step of present embodiment:
Adjust the tail backing positions and rise the step on top: be used for adjusting the position that accent tail backward rises frame; Make said support the passing cylinder cylinder club head and the passing cylinder of having extracted the adjacent support that will extract out of support out point-blank and connect the top, as the shielding of extracting next support out.
The step of traction spring exerciser is installed: be used for the traction spring exerciser that has hauling block being installed at the pin hole of the cylinder club head of the passing cylinder of tail support on the tail support.
Step through the hauling block reeve on the traction spring exerciser: be used for the haulage cable on the double-speed winch is passed hauling block bolt on the traction spring exerciser at the pin hole that will withdraw support on the cylinder club head of passing cylinder adjacent with withdrawing from support.
The step that the support of having fastened wire rope is extracted out: utilize double-speed winch to be drawn out to return channel after being used for the support of fastening with wire rope fallen through the hauling block of the traction spring exerciser on the tail support.
Be drawn out of support transfer to step: be used for utilizing individual prop and double-speed winch to turn to 90 degree on the support of extracting out, be adjusted to and be parallel to the return channel coal and help.
Pull out the step of return channel with being drawn out of support: be used for the wire rope of double-speed winch is fastened the pin hole at the cylinder club head of the passing cylinder that is drawn out of support, will be drawn out of support with double-speed winch and pull out in return channel to the haulage gate and transport.
Repeat in order: adjustment tail backing positions and rise the step on top, the step of traction spring exerciser be installed on the tail support, the step through the hauling block reeve on the traction spring exerciser, will fasten step that the support of wire rope extracts out, be drawn out of support transfer to step, will be drawn out of the step that support is pulled out return channel; Successively the support of tail to head is extracted out and returned and withdraw haulage gate to and transport.
The key of present embodiment is installed the traction spring exerciser that has hauling block on the tail support.Use this traction spring exerciser easily the support of arranging to be extracted out.
Embodiment two:
Present embodiment is the key tool traction spring exerciser that method described in the embodiment one is used, and is as shown in Figure 5.Present embodiment comprises: one section crossbeam 1101 that is fixed with hauling block; The middle part of said crossbeam have one with the tie-beam that is fixedly connected with crossbeam 1102 of beam vertical; The other end of said tie-beam is fixedly connected with a short beam 1104; Said short beam is parallel with crossbeam; And form a door font with crossbeam, tie-beam, and the width of the opening part of said door font conforms to the base of hydraulic support, and there is a pin hole 1103 at the middle part of said tie-beam with the position that the pin hole of the cylinder club head of the passing cylinder of hydraulic support conforms to.
The stressing conditions of hauling block as shown in Figure 6.Show among the figure that hauling block receives the big load of both direction: the direction of arrow B, C direction.Can be reached a conclusion by stressing conditions: hauling block can not be directly installed on the cylinder club head that moves oil cylinder.Reason is fairly obvious: the cylinder bar that moves oil cylinder can only bear axial big load, just the big load of C direction among Fig. 6; Can not bear radially big load, just the big load of B direction among Fig. 6.Present embodiment will be realized is stressed and do not make the cylinder bar of oil cylinder produce distortion, the radial load that reduces cylinder rod of trying one's best in other words at both direction.Present embodiment has solved this problem through traction spring exerciser.Present embodiment can produce small rotation around the pin hole of cylinder rod head when receiving the load of both direction; As shown in Figure 6; Under the acting in conjunction of active force B, C; At this moment cylinder rod head stressed converts torque into, makes bracket base bear a part of radial load, reduced the radial load that the cylinder bar is born.Present embodiment has solved the problem that the cylinder bar bears big radial load through mechanics principle with traction spring exerciser simple in structure cleverly.Should conform to the size of bracket base with distance between the short beam at actual middle cross beam as far as possible; In the operation of carrying out the support extraction; The cylinder bar of the hydraulic cylinder of traction spring exerciser is installed should be regained as far as possible, to reduce the pressure of radial load to the cylinder shaft seal, makes it avoid damaging.
Why present embodiment becomes the h type, can make the support that is drawn out of as far as possible near the center of withdrawing passage on one side of traction spring exerciser breach, for next step to ready.
Embodiment three:
Present embodiment is the improvement of embodiment two, is the refinement of embodiment two about chest expander.Be provided with reinforcing rib 1105 between described crossbeam of present embodiment and the tie-beam.
Present embodiment is provided with leg-of-mutton reinforcing rib according to stressing conditions at crossbeam and tie-beam.
What should explain at last is; Below only unrestricted in order to technical scheme of the present invention to be described; Although with reference to the preferred arrangement scheme the present invention is specified, those of ordinary skill in the art should be appreciated that can be to technical scheme of the present invention (such as returning the process remove, returning the arrangement of particulars of removing; And the form of traction spring exerciser etc.) makes amendment or be equal to replacement, and do not break away from the spirit and the scope of technical scheme of the present invention.
Claims (3)
1. fully-mechanized mining working rack restoring method; The equipment that said method is used comprises: individual prop, anchor pole, hauling block, double-speed winch, traction spring exerciser; Described traction spring exerciser comprises: one section crossbeam that is fixed with hauling block, the middle part of said crossbeam have one with the tie-beam that is fixedly connected with crossbeam of beam vertical, the other end of said tie-beam is fixedly connected with a short beam; Said short beam is parallel with crossbeam; And form a door font with crossbeam, tie-beam, and the width of the opening part of said door font conforms to the base of hydraulic support, and there is a pin hole at the middle part of said tie-beam with the position that the pin hole of the cylinder club head of the passing cylinder of hydraulic support conforms to; Said method is carried out the fully-mechanized mining working rack restoring by following sequence of steps:
Set up the step of protection: be used between tail support and coal group, adding dozen individual prop with array pitch between certain; Guarantee roof safety; Simultaneously along with the withdrawing from of tail support, can beat individual prop in the space of withdrawing from or grillage connects the top, extract the top, back out and cave in to prevent the tail support;
Step at installation hauling block on the rib: be used on the relative rib of the passing cylinder of tail support, beating anchor pole, hauling block is installed on anchor pole;
Step through the hauling block reeve on the anchor pole: be used for the hauling block that the haulage cable on the double-speed winch passes on the anchor pole is fastened the pin hole of on the tail support, passing the cylinder club head of cylinder;
The step that the tail support is extracted out: utilize double-speed winch to be drawn out to return channel after being used for the tail support fallen through the hauling block on the rib anchor pole;
The tail support transfer to step: be used for utilizing individual prop and double-speed winch to turn to 90 degree on the tail support of extracting out, be adjusted to and be parallel to the return channel coal and help;
It is characterized in that:
Adjust the tail backing positions and rise the step on top: be used for adjusting the position that accent tail backward rises frame; Make said support the passing cylinder cylinder club head and the passing cylinder of having extracted the adjacent support that will extract out of support out point-blank and connect the top, as the shielding of extracting next support out;
The step of traction spring exerciser is installed: be used for the traction spring exerciser that has hauling block being installed at the pin hole of the cylinder club head of the passing cylinder of tail support on the tail support;
Step through the hauling block reeve on the traction spring exerciser: be used for the haulage cable on the double-speed winch is passed hauling block bolt on the traction spring exerciser at the pin hole that will withdraw support on the cylinder club head of passing cylinder adjacent with withdrawing from support;
The step that the support of having fastened wire rope is extracted out: utilize double-speed winch to be drawn out to return channel after being used for the support of fastening with wire rope fallen through the hauling block of the traction spring exerciser on the tail support;
Be drawn out of support transfer to step: be used for utilizing individual prop and double-speed winch to turn to 90 degree on the support of extracting out, be adjusted to and be parallel to the return channel coal and help;
Pull out the step of return channel with being drawn out of support: be used for the wire rope of double-speed winch is fastened the pin hole at the cylinder club head of the passing cylinder that is drawn out of support, will be drawn out of support with double-speed winch and pull out in return channel to the haulage gate and transport;
Repeat in order: adjustment tail backing positions and rise the step on top, the step of traction spring exerciser be installed on the tail support, the step through the hauling block reeve on the traction spring exerciser, will fasten step that the support of wire rope extracts out, be drawn out of support transfer to step, will be drawn out of the step that support is pulled out return channel; Successively the support of tail to head is extracted out and returned and withdraw haulage gate to and transport.
2. a fully-mechanized mining working rack restoring is used the support traction spring exerciser; Comprise: one section crossbeam that is fixed with hauling block; It is characterized in that, the middle part of said crossbeam have one with the tie-beam that is fixedly connected with crossbeam of beam vertical, the other end of said tie-beam is fixedly connected with a short beam; Said short beam is parallel with crossbeam; And form a door font with crossbeam, tie-beam, and the width of the opening part of said door font conforms to the base of hydraulic support, and there is a pin hole at the middle part of said tie-beam with the position that the pin hole of the cylinder club head of the passing cylinder of hydraulic support conforms to.
3. chest expander according to claim 2 is characterized in that, is provided with reinforcing rib between described crossbeam and the tie-beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010197674A CN101845958B (en) | 2010-06-11 | 2010-06-11 | Fully mechanized coal face bracket withdrawing method and bracket traction puller for withdrawing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010197674A CN101845958B (en) | 2010-06-11 | 2010-06-11 | Fully mechanized coal face bracket withdrawing method and bracket traction puller for withdrawing |
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| CN101845958A CN101845958A (en) | 2010-09-29 |
| CN101845958B true CN101845958B (en) | 2012-10-10 |
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| CN102086769B (en) * | 2010-12-15 | 2012-09-05 | 中国神华能源股份有限公司 | Method for retracting hydraulic support by utilizing four shield supports |
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| CN2755282Y (en) * | 2004-06-10 | 2006-02-01 | 铁法煤业(集团)有限责任公司小康煤矿 | Apparatus for restoring machines from comprehensive coal face |
| CN101100947A (en) * | 2007-08-13 | 2008-01-09 | 李长生 | Lane type hydraulic support for sheltering from sharply slanted coal layer and its mounting, retracting and retreating method |
| CN201705371U (en) * | 2010-06-11 | 2011-01-12 | 北京天地华泰采矿工程技术有限公司 | Tractor for withdrawing support on fully mechanized mining face |
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| IN189157B (en) * | 1994-06-27 | 2002-12-28 | Voss Richard Grubenausbau |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2755282Y (en) * | 2004-06-10 | 2006-02-01 | 铁法煤业(集团)有限责任公司小康煤矿 | Apparatus for restoring machines from comprehensive coal face |
| CN101100947A (en) * | 2007-08-13 | 2008-01-09 | 李长生 | Lane type hydraulic support for sheltering from sharply slanted coal layer and its mounting, retracting and retreating method |
| CN201705371U (en) * | 2010-06-11 | 2011-01-12 | 北京天地华泰采矿工程技术有限公司 | Tractor for withdrawing support on fully mechanized mining face |
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