CN112610262A - High-water material filling device and method suitable for gob-side entry retaining - Google Patents
High-water material filling device and method suitable for gob-side entry retaining Download PDFInfo
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- CN112610262A CN112610262A CN202011372041.5A CN202011372041A CN112610262A CN 112610262 A CN112610262 A CN 112610262A CN 202011372041 A CN202011372041 A CN 202011372041A CN 112610262 A CN112610262 A CN 112610262A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 239000002002 slurry Substances 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000005429 filling process Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 6
- 238000005065 mining Methods 0.000 abstract description 5
- 239000011440 grout Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
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- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses a high-water material filling device and a high-water material filling method suitable for gob-side entry retaining, wherein a row of front hydraulic supports and a row of rear hydraulic supports are respectively arranged on two sides of a roadway along the pushing direction of a working face and are in one-to-one correspondence, then each front hydraulic support and each rear hydraulic support are respectively provided with a combined filling plate, filling bags are hung on each combined filling plate and penetrate through opposite-pulling anchor rods, then grouting is carried out in the filling bags, and the filling bags are gradually close to the top plate of the roadway along with the continuous injection of grout after a front top beam retracts in the grouting process until top connection is completed; when the slurry in the bag reaches 4MPa after the top connection, the filling operation of the position is completed; then adjusting the combined filling plate and driving the front hydraulic support and the rear hydraulic support to move forwards along the roadway, after the work of moving the supports is completed, repeating the filling and grouting process again, and filling operation at the position; the method is simple to operate, and can realize safe, efficient and continuous filling operation of high-water materials in the gob-side entry retaining, thereby ensuring the continuous and stable coal mining.
Description
Technical Field
The invention relates to a high-water material filling device and method suitable for gob-side entry retaining, and belongs to the technical field of coal mine safety mining.
Background
The gob-side entry retaining technology cancels section coal pillars, improves the extraction rate of coal resources, and is widely applied in recent years. In the prior art, the high-water material has the advantages of large support resistance, high resistance increasing speed, proper amount of contractibility, good roadway maintenance effect and simple filling process and filling equipment, and is applied to partial mining areas at present. However, the high-water material is injected into the filling bag in a liquid form and then is solidified and formed, so that a formwork is required to provide support for filling and forming. The current main formwork supporting process comprises: the method comprises the steps of supporting columns, erecting a reinforcing mesh, hanging a filling bag, penetrating a counter-pull anchor rod and fixing a ladder beam, and grouting.
The processes are all operated manually, and are long in time consumption and low in efficiency. The reinforcing mesh has poor deformation resistance, so that the opposite-pulling anchor rods cannot be ensured to be in a straight line, and the anchoring effect of the anchor rods cannot be fully exerted; the trimming is required to be carried out according to the top plate and the bottom plate and can not be recycled. In addition, the single hydraulic prop is heavy in weight and poor in stability, and a top plate and a bottom plate bulge can occur when the surrounding rock condition of a roadway is poor, so that a filling bag cannot be fully hung or does not contact with the top after being hung, the supporting quality is affected, and the top plate is prone to caving when a goaf stand column and a back column are withdrawn. And the top beam blocks the filling body from contacting the top of the currently adopted filling support, so that the top plate is separated from the layer, and the roadway maintenance cost is increased. Therefore, how to safely, efficiently and continuously carry out high-water material filling in gob-side entry retaining is the research direction of the industry.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a high-water material filling device and method suitable for gob-side entry retaining, which are simple to operate and can realize safe, efficient and continuous high-water material filling operation in gob-side entry retaining, thereby ensuring the continuous and stable coal mining.
In order to achieve the purpose, the invention adopts the technical scheme that: a high-water material filling device suitable for gob-side entry retaining comprises a plurality of front hydraulic supports and a plurality of rear hydraulic supports, wherein the number of the front hydraulic supports is the same as that of the rear hydraulic supports; each front hydraulic support and each rear hydraulic support are respectively provided with a combined filling plate, and each front hydraulic support and the two combined filling plates on the corresponding rear hydraulic support are oppositely arranged;
the front hydraulic support comprises a front hydraulic support top beam, a support arm, a telescopic upright post and an iron shoe, wherein the telescopic upright post consists of a first upright post, a second upright post, a third upright post and a fourth upright post; the second upright post is positioned in the first upright post and can extend out from the lower end of the first upright post, the third upright post is positioned in the second upright post and can extend out from the lower end of the second upright post, the fourth upright post is positioned in the third upright post and can extend out from the lower end of the third upright post, the iron shoe is fixed at the lower end of the fourth upright post, and a filling plate locking hook and a filling plate pulling hook are arranged outside the first upright post, the second upright post and the third upright post; a top beam lock is arranged on the top beam of the front hydraulic support;
the rear hydraulic support comprises a base, a front top beam, a rear top beam, a shield beam, a hydraulic strut and an inter-support sliding top plate, wherein the rear top beam is positioned above the base and is connected with the base through the shield beam and the hydraulic strut; the sliding top plate between the frames is arranged at one side of the rear top beam and the shield beam; the front top beam is positioned in the rear top beam and can extend out of the rear top beam, the extending end of the front top beam is provided with a locking groove, and the front top beam is locked with the top beam of the front hydraulic support through the locking groove and the top beam lock after extending out and is relatively fixed with the top beam of the front hydraulic support; the lower part of the front top beam is provided with a pressure sensor; the lower part of the rear top beam is provided with a telescopic oil cylinder, and the structure of the telescopic oil cylinder is the same as that of a telescopic upright post of the front hydraulic support;
the combined filling plate comprises a first filling plate, a second filling plate and a third filling plate, wherein the first filling plate consists of an upper small plate I, a middle and small plate I and a lower small plate I, the upper small plate I is arranged at the upper part of the middle small plate I, and the upper small plate I can slide upwards relative to the middle and small plate I to extend out; the lower end of the middle small plate I is movably connected with the upper end of the lower small plate I through a hinge, so that the lower small plate I can be turned upwards by taking the hinge as an axial direction and is positioned on the same plane with the upper small plate I and the middle small plate I when the lower small plate I is not turned; the second filling plate consists of an upper small plate II and a lower small plate II, the lower end of the upper small plate II is movably connected with the upper end of the lower small plate II through a hinge, so that the lower small plate II can be turned upwards by taking the hinge as an axial direction and is positioned on the same plane with the upper small plate II when the lower small plate II is not turned; the third filling plate consists of an upper small plate III and a lower small plate III, the lower end of the upper small plate III is movably connected with the upper end of the lower small plate III through a hinge, so that the lower small plate III can be turned upwards by taking the hinge as an axial direction, and is positioned on the same plane with the upper small plate III when the lower small plate III is not turned; a bag hanging bolt and a supporting platform are arranged on the side part of the upper small plate I; the same sides of the middle small plate I, the upper small plate II and the upper small plate III are provided with an inserting groove, a lock hook sliding groove and a pulling block; the lower small plate I, the lower small plate II and the lower small plate III are all provided with a split anchor rod port and a bolt; bosses are arranged at the lower end of the lower small plate I, the upper end of the upper small plate II, the lower end of the lower small plate II and the upper end of the upper small plate III; the first filling plate, the second filling plate and the third filling plate are mutually clamped and fixed through the locking hook sliding grooves and the locking hooks of the filling plates, the pulling hooks of the filling plates are connected with the pulling blocks through the pulling belts, and the first filling plate, the second filling plate and the third filling plate are fixed with the first stand column, the second stand column and the third stand column respectively and are positioned on the same vertical plane.
Furthermore, the number of the telescopic upright columns of each front hydraulic support is two.
Furthermore, three split anchor rod openings are formed in the lower small plate I, the lower small plate II and the lower small plate III.
A working method of a high-water material filling device suitable for gob-side entry retaining comprises the following specific steps:
A. laying a rear hydraulic support: a plurality of rear hydraulic supports are arranged on one side of the roadway in the axial direction of the roadway side by side (two follow-up hydraulic supports can be arranged in front of the rear hydraulic supports and used for supporting in time along with the advancing of a working face), then an inter-frame sliding top plate and an inter-frame advancing oil cylinder are arranged between the adjacent rear hydraulic supports, and after the lifting of each hydraulic support is finished, the rear top beam of each rear hydraulic support supports the roadway top plate;
B. laying a front hydraulic support: arranging all the front hydraulic supports on the other side of the roadway side by side, aligning the front hydraulic supports with all the rear hydraulic supports respectively, and controlling the telescopic upright posts to rise to enable the top beams of the front hydraulic supports of all the front hydraulic supports to support the top plate of the roadway; then controlling the front top beams of the rear hydraulic supports to extend until the extending ends of the front top beams and the top beams of the front hydraulic supports are mutually clamped and fixed through top beam locks and locking grooves to form an integral structure;
C. erecting a combined filling plate: the first filling plate, the second filling plate and the third filling plate are clamped and fixed with each other through a lock hook sliding groove and a filling plate lock hook, and the filling plate draw hook is connected with a drawing block through a draw belt and fixed with a first upright post, a second upright post and a third upright post of the front hydraulic support respectively, and the first filling plate, the second filling plate and the third filling plate are positioned on the same vertical plane; simultaneously, the lower small plate I, the lower small plate II and the lower small plate III are all in a non-turnover state, finally, the upper small plate I is upwards slid and extends out of the middle small plate I until the upper small plate I is contacted with the lower end of a top beam of a front hydraulic support, and at the moment, the combined filling plate is rotated to enable the supporting arm to be positioned below a supporting platform of the upper small plate I to support the extended upper small plate I; the connection process of the combined filling plate and the telescopic oil cylinder of the rear hydraulic support is the same as that of the front hydraulic support;
D. hanging a filling bag, penetrating a counter-pulling anchor rod and grouting: hanging nylon hanging rings on the filling bags on bag hanging pins of the first filling plate, sequentially penetrating each counter pull anchor rod through each counter pull anchor rod opening on the combined filling plate, and grouting in the filling bags after completion;
E. filling and roof contacting: fill the bag and can expand and contact with preceding back timber lower part at the slip casting in-process, the reading on the staff observation pressure sensor, if pressure sensor detects the pressure value, then the staff makes the back timber lock open, and then inside the control front top timber retracted to back timber, the recovery back of back roof timber is accomplished to the completion front top timber, fills the bag and is close to the tunnel roof gradually along with the continuous injection of thick liquid. Until the top contact is completed;
F. moving the front hydraulic support and the rear hydraulic support: after the roof is connected, the slurry in the filling bag starts to move towards the working face when the strength reaches 4MPa, and the lower small plate I, the lower small plate II and the lower small plate III of each filling plate are turned upwards and positioned through the bolts and the slots; rotating the combined filling plate to stagger the supporting arm and the supporting platform, so that the extended upper small plate I is reset; and then retracting a fourth upright post of the foremost group of front hydraulic supports to enable the iron shoes not to be in contact with a roadway bottom plate, simultaneously reducing the height of a rear top beam of the corresponding rear hydraulic support but keeping in contact with a roadway top plate, finally enabling the group of front hydraulic supports and the rear hydraulic supports to be wiped with pressure along the axial direction of the roadway to move in a jacking mode through a pushing oil cylinder between the sliding top plate and the sliding support, extending the fourth upright post of the group of front hydraulic supports to enable the iron shoes to be in contact with the roadway bottom plate to support after reaching a set position, enabling the rear top beam of the rear hydraulic support to be in contact with the roadway top plate to support, completing the frame moving process of the group of front hydraulic supports and the rear hydraulic supports, sequentially repeating the steps B to F to complete the whole frame moving process, and repeating the steps B to F to perform the next filling process until the filling work of the whole roadway is.
Compared with the prior art, the invention adopts a mode of combining the front hydraulic support, the rear hydraulic support and the combined filling plate, a row of front hydraulic supports and a row of rear hydraulic supports are respectively arranged at two sides of the roadway along the advancing direction of the working surface and are in one-to-one correspondence, then each front hydraulic support and each rear hydraulic support are respectively provided with a combined filling plate, after the assembly is completed, the filling bag is hung on each combined filling plate and penetrates through the opposite pulling anchor rods, then the filling bag is grouted, and the filling bag is gradually close to the top plate of the roadway along with the continuous injection of the grout after the front top beam retracts in the grouting process. Until the top contact is completed; when the slurry in the filling bag reaches the strength of 4MPa after the roof is connected, the filling operation of the position is completed; then adjusting the combined filling plate and driving the front hydraulic support and the rear hydraulic support to move forwards along the axial direction of the roadway, after the work of moving the supports is completed, repeating the filling and grouting process again, and filling operation at the position; repeating the steps until the filling work of the whole roadway is completed; the invention has simple operation, and can realize safe, efficient and continuous filling operation of high-water material in the gob-side entry retaining, thereby ensuring the continuous and stable coal mining.
Drawings
FIG. 1 is a schematic view of the connection of two adjacent front hydraulic supports according to the present invention;
FIG. 2 is a schematic structural view of a front hydraulic mount according to the present invention;
FIG. 3 is a schematic diagram of the rear hydraulic mount of the present invention;
FIG. 4 is a schematic view showing the construction of a first infill panel according to the present invention;
FIG. 5 is a schematic view showing the construction of a second filling sheet according to the present invention;
FIG. 6 is a schematic view showing the structure of a third packing plate according to the present invention;
FIG. 7 is a schematic view of the lock slot and header lock configuration of the present invention;
FIG. 8 is a schematic view of the assembled filling board of the present invention;
fig. 9 is a schematic view of the filling process of the present invention.
In the figure: 1. the front hydraulic support, the rear hydraulic support, the combined filling plate, the rear hydraulic support, the combined filling plate, the rear hydraulic support, the rear hydraulic.
Detailed Description
The present invention will be further explained below.
As shown in the figure, the high-water material filling device suitable for gob-side entry retaining comprises a plurality of front hydraulic supports 1 and a plurality of rear hydraulic supports 2, wherein the number of the front hydraulic supports 1 is the same as that of the rear hydraulic supports 2, the plurality of front hydraulic supports 1 and the plurality of rear hydraulic supports 2 are arranged in a one-to-one correspondence manner and are arranged side by side respectively, and the adjacent front hydraulic supports 1 and the adjacent rear hydraulic supports 2 are connected through inter-support thrust cylinders 4; each front hydraulic support 1 and each rear hydraulic support 4 are respectively provided with a combined filling plate 3, and each front hydraulic support 1 and the two combined filling plates 3 on the corresponding rear hydraulic support 2 are oppositely arranged;
the front hydraulic support 1 comprises a front hydraulic support top beam 105, a supporting arm 106, a telescopic upright post and an iron shoe 102, wherein the telescopic upright post consists of a first upright post 101-1, a second upright post 101-2, a third upright post 101-3 and a fourth upright post 101-4, the first upright post 101-1 is vertically fixed below the front hydraulic support top beam 105, the upper end of the first upright post is fixedly connected with the lower part of the front hydraulic support top beam 105, the supporting arm 106 is vertically arranged with the first upright post 101-1, and one end of the supporting arm 106 is fixedly connected with the outer surface of the first upright post 101-1; the second upright post 101-2 is positioned in the first upright post 101-1 and can extend out from the lower end of the first upright post 101-1, the third upright post 101-3 is positioned in the second upright post 101-2 and can extend out from the lower end of the second upright post 101-2, the fourth upright post 101-4 is positioned in the third upright post 101-3 and can extend out from the lower end of the third upright post 101-3, the iron shoe 102 is fixed at the lower end of the fourth upright post 101-4, and the filling plate locking hook 103 and the filling plate pulling hook 104 are arranged outside the first upright post 101-1, the second upright post 101-2 and the third upright post 101-3; a top beam lock is arranged on the top beam 105 of the front hydraulic support;
the rear hydraulic support 2 comprises a base 201, a front top beam 204, a rear top beam 203, a shield beam 205, a hydraulic strut 202 and an inter-support sliding top plate 206, wherein the rear top beam 203 is positioned above the base 201 and is connected with the base 201 through the shield beam 205 and the hydraulic strut 202; an inter-frame sliding top plate 206 is mounted on one side of the rear top beam 203 and the shield beam 205; the front top beam 204 is positioned inside the rear top beam 203 and can extend out of the rear top beam 203, the extending end of the front top beam 204 is provided with a locking groove 207, and the front top beam 204 is locked with the front hydraulic support top beam 105 through the locking groove 207 and the top beam lock after extending out and is relatively fixed; a pressure sensor is arranged at the lower part of the front top beam 204; the lower part of the rear top beam 203 is provided with a telescopic oil cylinder, and the structure of the telescopic oil cylinder is the same as that of a telescopic upright post of the front hydraulic support 1;
the combined filling plate comprises a first filling plate 3-1, a second filling plate 3-2 and a third filling plate 3-3, wherein the first filling plate 3-1 consists of an upper small plate I, a middle and small plate I and a lower small plate I, the upper small plate I is arranged at the upper part of the middle small plate I, and the upper small plate I can slide upwards relative to the middle and small plate I to extend out; the lower end of the middle small plate I is movably connected with the upper end of the lower small plate I through a hinge 303, so that the lower small plate I can be turned upwards by taking the hinge 303 as an axis and is positioned on the same plane with the upper small plate I and the middle small plate I when the lower small plate I is not turned; the second filling plate 3-2 consists of an upper small plate II and a lower small plate II, the lower end of the upper small plate II is movably connected with the upper end of the lower small plate II through a hinge 303, so that the lower small plate II can be turned upwards by taking the hinge 303 as an axis and is positioned on the same plane with the upper small plate II when the lower small plate II is not turned; the third filling plate 3-3 consists of an upper small plate III and a lower small plate III, the lower end of the upper small plate III is movably connected with the upper end of the lower small plate III through a hinge 303, so that the lower small plate III can be turned upwards by taking the hinge 303 as an axis and is positioned on the same plane with the upper small plate III when the lower small plate III is not turned; the side part of the upper small plate I is provided with a bag hanging bolt 307 and a support table 308; the same sides of the middle small plate I, the upper small plate II and the upper small plate III are provided with an inserting groove 305, a latch hook sliding groove 306 and a pulling block 302; the lower small plate I, the lower small plate II and the lower small plate III are all provided with a counter-pull anchor rod port 301 and a plug pin 304; bosses are arranged at the lower end of the lower small plate I, the upper end of the upper small plate II, the lower end of the lower small plate II and the upper end of the upper small plate III; the first filling plate 3-1, the second filling plate 3-2 and the third filling plate 3-3 are mutually clamped and fixed through the locking hook sliding groove 306 and the filling plate locking hook 103, the filling plate pulling hook 104 is connected with the pulling block 302 through a pulling strip, and are respectively fixed with the first upright post 101-1, the second upright post 101-2 and the third upright post 101-3, and the first filling plate 3-1, the second filling plate 3-2 and the third filling plate 3-3 are positioned on the same vertical plane.
Further, the number of the telescopic upright columns of each front hydraulic support 1 is two.
Further, three counter-pull anchor rod openings 301 are formed in the lower small plate I, the lower small plate II and the lower small plate III.
A working method of a high-water material filling device suitable for gob-side entry retaining comprises the following specific steps:
A. laying a rear hydraulic support 2: a plurality of rear hydraulic supports 2 are arranged on one side of the roadway in the axial direction of the roadway side by side (two follow-up hydraulic supports can be arranged in front of the rear hydraulic supports 2 and used for supporting in time along with the advance of a working face), then an inter-frame sliding top plate 206 and an inter-frame advancing oil cylinder 4 are arranged between the adjacent rear hydraulic supports 2, after the completion, each hydraulic support 202 is controlled to rise, and the rear top beam 203 of each rear hydraulic support 2 supports the top plate of the roadway;
B. arranging a front hydraulic support 1: arranging the front hydraulic supports 1 on the other side of the roadway side by side and aligning the front hydraulic supports 1 with the rear hydraulic supports 2 respectively, and controlling the telescopic upright posts to rise to enable the front hydraulic support top beams 105 of the front hydraulic supports 1 to support the top plate of the roadway; then, the front top beams 204 of the rear hydraulic supports 2 are controlled to extend until the extending ends of the front top beams 204 and the front hydraulic support top beams 105 are mutually clamped and fixed through top beam locks and locking grooves 207 to form an integral structure;
C. erecting a combined filling plate 3: a group of front hydraulic support 1 and a group of rear hydraulic support 2 are respectively provided with a combined filling plate 3, wherein the combined filling plate 3 connected with the front hydraulic support 1 is characterized in that a first filling plate 3-1, a second filling plate 3-2 and a third filling plate 3-3 are mutually clamped and fixed through a lock hook sliding groove 306 and a filling plate lock hook 103, a filling plate draw hook 104 is connected with a draw block 302 through a draw belt, and the combined filling plate 3-1, the second filling plate 3-2 and the third filling plate 3-3 are respectively fixed with a first upright column 101-1, a second upright column 101-2 and a third upright column 101-3 of the front hydraulic support 1, and the first filling plate 3-1, the second filling plate 3-2 and the third filling plate 3-3 are positioned on the same vertical plane; meanwhile, the lower small plate I, the lower small plate II and the lower small plate III are all in a non-turnover state, finally, the upper small plate I is upwards slid and extends out relative to the middle small plate I until the upper small plate I is contacted with the lower end of the top beam 105 of the front hydraulic support, and at the moment, the combined filling plate 3 is rotated to enable the supporting arm 106 to be positioned below the supporting platform 308 of the upper small plate I to support the extended upper small plate I; the connection process of the combined filling plate 3 and the telescopic oil cylinder of the rear hydraulic support 2 is the same as that of the front hydraulic support 1;
D. hanging a filling bag, penetrating a counter-pulling anchor rod and grouting: hanging nylon hanging rings on the filling bags on bag hanging pins of the first filling plate 3-1, sequentially penetrating each counter pull anchor rod through each counter pull anchor rod port 301 on the combined filling plate 3, and grouting in the filling bags after completion;
E. filling and roof contacting: fill the bag and can expand and contact with preceding back timber 204 lower part at the slip casting in-process, the reading on the staff observation pressure sensor, if pressure sensor detects the pressure value, then the staff makes the back timber lock open, and then inside the control front top timber 204 retracted to back top timber 203, the recovery back of accomplishing front top timber 204, fill the bag and be close to the tunnel roof gradually along with the continuous injection of thick liquid. Until the top contact is completed;
F. moving the front hydraulic support 1 and the rear hydraulic support 2: after the top is connected, the slurry in the filling bag starts to move towards the working face when the strength reaches 4MPa, and the lower small plate I, the lower small plate II and the lower small plate III of each filling plate are turned upwards and positioned through the bolts 304 and the slots 305; rotating the combined filling plate 3 to stagger the supporting arm 106 and the supporting platform 308, so that the extended upper small plate I is reset; then the fourth upright post 101-4 of the front group of the front hydraulic supports 1 is retracted to ensure that the iron shoe 102 is not contacted with the roadway bottom plate, simultaneously, the height of the rear top beam 203 of the corresponding rear hydraulic support is reduced, but the rear top beam keeps contact with the top plate of the roadway, finally, the front hydraulic support 1 and the rear hydraulic support 2 of the group are subjected to wiping and jacking movement along the axial direction of the roadway under pressure through the inter-frame sliding top plate 206 and the inter-frame propelling oil cylinder 4, after reaching the set position, the fourth upright post 101-4 of the group of front hydraulic supports 1 is extended out to enable the iron shoe 102 to be in contact with the roadway bottom plate for supporting, meanwhile, the rear top beam 203 of the rear hydraulic support is in contact with the top plate of the roadway for supporting, the support moving process of the group of the front hydraulic support 1 and the rear hydraulic support 2 is completed, the processes are sequentially repeated for the rear groups, the whole support moving process is completed, and then repeating the steps B to F, carrying out the next filling process, and repeating the steps until the filling work of the whole roadway is completed.
Claims (4)
1. A high-water material filling device suitable for gob-side entry retaining is characterized by comprising a plurality of front hydraulic supports and a plurality of rear hydraulic supports, wherein the number of the front hydraulic supports is the same as that of the rear hydraulic supports; each front hydraulic support and each rear hydraulic support are respectively provided with a combined filling plate, and each front hydraulic support and the two combined filling plates on the corresponding rear hydraulic support are oppositely arranged;
the front hydraulic support comprises a front hydraulic support top beam, a support arm, a telescopic upright post and an iron shoe, wherein the telescopic upright post consists of a first upright post, a second upright post, a third upright post and a fourth upright post; the second upright post is positioned in the first upright post and can extend out from the lower end of the first upright post, the third upright post is positioned in the second upright post and can extend out from the lower end of the second upright post, the fourth upright post is positioned in the third upright post and can extend out from the lower end of the third upright post, the iron shoe is fixed at the lower end of the fourth upright post, and a filling plate locking hook and a filling plate pulling hook are arranged outside the first upright post, the second upright post and the third upright post; a top beam lock is arranged on the top beam of the front hydraulic support;
the rear hydraulic support comprises a base, a front top beam, a rear top beam, a shield beam, a hydraulic strut and an inter-support sliding top plate, wherein the rear top beam is positioned above the base and is connected with the base through the shield beam and the hydraulic strut; the sliding top plate between the frames is arranged at one side of the rear top beam and the shield beam; the front top beam is positioned in the rear top beam and can extend out of the rear top beam, the extending end of the front top beam is provided with a locking groove, and the front top beam is locked with the top beam of the front hydraulic support through the locking groove and the top beam lock after extending out and is relatively fixed with the top beam of the front hydraulic support; the lower part of the front top beam is provided with a pressure sensor; the lower part of the rear top beam is provided with a telescopic oil cylinder, and the structure of the telescopic oil cylinder is the same as that of a telescopic upright post of the front hydraulic support;
the combined filling plate comprises a first filling plate, a second filling plate and a third filling plate, wherein the first filling plate consists of an upper small plate I, a middle and small plate I and a lower small plate I, the upper small plate I is arranged at the upper part of the middle small plate I, and the upper small plate I can slide upwards relative to the middle and small plate I to extend out; the lower end of the middle small plate I is movably connected with the upper end of the lower small plate I through a hinge, so that the lower small plate I can be turned upwards by taking the hinge as an axial direction and is positioned on the same plane with the upper small plate I and the middle small plate I when the lower small plate I is not turned; the second filling plate consists of an upper small plate II and a lower small plate II, the lower end of the upper small plate II is movably connected with the upper end of the lower small plate II through a hinge, so that the lower small plate II can be turned upwards by taking the hinge as an axial direction and is positioned on the same plane with the upper small plate II when the lower small plate II is not turned; the third filling plate consists of an upper small plate III and a lower small plate III, the lower end of the upper small plate III is movably connected with the upper end of the lower small plate III through a hinge, so that the lower small plate III can be turned upwards by taking the hinge as an axial direction, and is positioned on the same plane with the upper small plate III when the lower small plate III is not turned; a bag hanging bolt and a supporting platform are arranged on the side part of the upper small plate I; the same sides of the middle small plate I, the upper small plate II and the upper small plate III are provided with an inserting groove, a lock hook sliding groove and a pulling block; the lower small plate I, the lower small plate II and the lower small plate III are all provided with a split anchor rod port and a bolt; bosses are arranged at the lower end of the lower small plate I, the upper end of the upper small plate II, the lower end of the lower small plate II and the upper end of the upper small plate III; the first filling plate, the second filling plate and the third filling plate are mutually clamped and fixed through the locking hook sliding grooves and the locking hooks of the filling plates, the pulling hooks of the filling plates are connected with the pulling blocks through the pulling belts, and the first filling plate, the second filling plate and the third filling plate are fixed with the first stand column, the second stand column and the third stand column respectively and are positioned on the same vertical plane.
2. The high-water material filling device suitable for gob-side entry retaining according to claim 1, wherein there are two telescopic pillars for each front hydraulic support.
3. The high-water-content material filling device suitable for gob-side entry retaining according to claim 1, wherein the lower small plate I, the lower small plate II and the lower small plate III are provided with three opposite-pull anchor rod openings.
4. The working method of the high-water material filling device suitable for the gob-side entry retaining according to claim 1 is characterized by comprising the following specific steps:
A. laying a rear hydraulic support: arranging a plurality of rear hydraulic supports on one side of the roadway in the axial direction of the roadway side by side, then installing an inter-frame sliding top plate and an inter-frame propelling oil cylinder between the adjacent rear hydraulic supports, and controlling each hydraulic support to rise after completion so that a rear top beam of each rear hydraulic support supports the roadway top plate;
B. laying a front hydraulic support: arranging all the front hydraulic supports on the other side of the roadway side by side, aligning the front hydraulic supports with all the rear hydraulic supports respectively, and controlling the telescopic upright posts to rise to enable the top beams of the front hydraulic supports of all the front hydraulic supports to support the top plate of the roadway; then controlling the front top beams of the rear hydraulic supports to extend until the extending ends of the front top beams and the top beams of the front hydraulic supports are mutually clamped and fixed through top beam locks and locking grooves to form an integral structure;
C. erecting a combined filling plate: the first filling plate, the second filling plate and the third filling plate are clamped and fixed with each other through a lock hook sliding groove and a filling plate lock hook, and the filling plate draw hook is connected with a drawing block through a draw belt and fixed with a first upright post, a second upright post and a third upright post of the front hydraulic support respectively, and the first filling plate, the second filling plate and the third filling plate are positioned on the same vertical plane; simultaneously, the lower small plate I, the lower small plate II and the lower small plate III are all in a non-turnover state, finally, the upper small plate I is upwards slid and extends out of the middle small plate I until the upper small plate I is contacted with the lower end of a top beam of a front hydraulic support, and at the moment, the combined filling plate is rotated to enable the supporting arm to be positioned below a supporting platform of the upper small plate I to support the extended upper small plate I; the connection process of the combined filling plate and the telescopic oil cylinder of the rear hydraulic support is the same as that of the front hydraulic support;
D. hanging a filling bag, penetrating a counter-pulling anchor rod and grouting: hanging nylon hanging rings on the filling bags on bag hanging pins of the first filling plate, sequentially penetrating each counter pull anchor rod through each counter pull anchor rod opening on the combined filling plate, and grouting in the filling bags after completion;
E. filling and roof contacting: fill the bag and can expand and contact with preceding back timber lower part at the slip casting in-process, the reading on the staff observation pressure sensor, if pressure sensor detects the pressure value, then the staff makes the back timber lock open, and then inside the control front top timber retracted to back timber, the recovery back of back roof timber is accomplished to the completion front top timber, fills the bag and is close to the tunnel roof gradually along with the continuous injection of thick liquid. Until the top contact is completed;
F. moving the front hydraulic support and the rear hydraulic support: after the roof is connected, the slurry in the filling bag starts to move towards the working face when the strength reaches 4MPa, and the lower small plate I, the lower small plate II and the lower small plate III of each filling plate are turned upwards and positioned through the bolts and the slots; rotating the combined filling plate to stagger the supporting arm and the supporting platform, so that the extended upper small plate I is reset; and then retracting a fourth upright post of the foremost group of front hydraulic supports to enable the iron shoes not to be in contact with a roadway bottom plate, simultaneously reducing the height of a rear top beam of the corresponding rear hydraulic support but keeping in contact with a roadway top plate, finally enabling the group of front hydraulic supports and the rear hydraulic supports to be wiped with pressure along the axial direction of the roadway to move in a jacking mode through a pushing oil cylinder between the sliding top plate and the sliding support, extending the fourth upright post of the group of front hydraulic supports to enable the iron shoes to be in contact with the roadway bottom plate to support after reaching a set position, enabling the rear top beam of the rear hydraulic support to be in contact with the roadway top plate to support, completing the frame moving process of the group of front hydraulic supports and the rear hydraulic supports, sequentially repeating the steps B to F to complete the whole frame moving process, and repeating the steps B to F to perform the next filling process until the filling work of the whole roadway is.
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