CN112796757A - Method for high-water filling material roadside filling gob-side entry retaining - Google Patents
Method for high-water filling material roadside filling gob-side entry retaining Download PDFInfo
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- 238000011049 filling Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000005065 mining Methods 0.000 claims abstract description 28
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- 239000002002 slurry Substances 0.000 claims description 33
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- 239000010878 waste rock Substances 0.000 claims description 10
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
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- 238000009415 formwork Methods 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
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- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 claims description 3
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- 238000000605 extraction Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 238000009423 ventilation Methods 0.000 abstract description 7
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/006—Ventilation at the working face of galleries or tunnels
-
- 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
-
- 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
- E21F15/08—Filling-up hydraulically or pneumatically
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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Abstract
The invention relates to a method for filling gob-side entry retaining beside a high-water filling material roadway, which adopts a gob-side entry retaining coal-pillar-free mining technology, and in the process of working face extraction, retains the extraction roadway of the working face through effective roadway-side support and in-roadway support technologies, and is used as an extraction roadway adjacent to the working face, so that the purpose of twice use of one roadway is realized, one roadway is dug in less quantity on each working face, the preparation time of the working face is greatly shortened, and the situation that after the working face extraction is finished, adjacent working faces are not prepared and the mining replacement is tense is avoided; meanwhile, the ventilation mode of the working face is optimized, two-in one-back Y-shaped ventilation is realized, the problem of gas accumulation at the corner of the working face is solved, and the propelling speed of the fully mechanized mining face is greatly increased.
Description
Technical Field
The invention relates to a method for high-water filling material roadside filling gob-side entry retaining, belongs to the field of working face mining methods, and particularly relates to a method for arranging a coal pillar-free roadway.
Background
The traditional fully mechanized coal mining face roadway arrangement mode is that a section coal pillar is reserved, the section coal pillar is divided into a wide coal pillar and a narrow coal pillar, the section coal pillar cannot be completely cancelled, the roadway protection coal pillar is reserved, serious waste of coal resources is caused, in the roadway arrangement mode, each working face needs to be tunneled again, and a situation that mine excavation and replacement are tight is caused.
The purpose of twice use of one roadway can be realized by gob-side entry retaining, and the problems can be solved. The roadside support is the key for ensuring the success of gob-side entry retaining, and the traditional roadside support has the defects of low resistance increasing speed, small bearing capacity, large compression deformation, poor sealing performance, low mechanization degree, high labor intensity, mechanical property not adapting to gob-side entry retaining surrounding rock deformation and the like, and is not beneficial to gob-side entry retaining maintenance and prevention of goaf air leakage and spontaneous combustion of coal beds. The high-water filling material has the advantages of high resistance increasing speed, large supporting resistance, appropriate amount of contractibility, capability of mechanically and integrally constructing the roadside support body, good sealing property of the gob, low labor intensity and the like, and is increasingly applied to gob-side entry retaining in recent years.
Disclosure of Invention
The invention provides a method for filling gob-side entry retaining beside a high-water filling material roadway, which can relieve the situation of shortage of mining and taking over, improve the economic benefit, optimize the ventilation mode of a working face and prolong the service life of a mine.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for filling gob-side entry retaining with high-water filling materials beside a roadway specifically comprises the following steps:
firstly, a first working face of the fully mechanized mining is supported by a hydraulic support, after coal cutting and a push scraper conveyor are carried out on the first working face, a rhombic metal net or a polyester fiber net is laid on a front top plate of the hydraulic support frame close to a roadway, and a hydraulic support of the first working face is pushed;
secondly, arranging a roadside filling body at one side of the goaf relative to a second working surface, and arranging dense single hydraulic struts or two gangue-blocking supports at one side of a filling area behind the hydraulic support and close to the goaf, wherein the roadside filling body is used for maintaining a working surface coal seam roof at one side of the roadside filling body close to the goaf; meanwhile, a plurality of single hydraulic supports are arranged in a filling area where the roadside filling bodies are arranged, and the single hydraulic supports are temporarily arranged to ensure the stability of a coal seam top plate on a working surface of the filling area;
thirdly, cleaning a filling area after a sufficient filling distance is formed behind the hydraulic support, cleaning float coal and virtual slag in the filling area, exposing out of the coal seam bottom rock, driving two rows of single hydraulic supports along two side surfaces of the length direction of the roadside filling body to form a mold protection single body, wherein the distance from the edge of the single hydraulic support close to the second working surface to the inner side edge of the other row of single hydraulic supports is the width of the roadside filling body;
fourthly, performing a first class of formwork erecting procedure in a filling area to form a filler reinforced supporting structure, specifically hanging a reinforcing mesh, sleeving a filling bag outside the whole reinforcing mesh structure, hanging the top of the filling bag on a coal seam top plate on a working surface, arranging a plurality of counter-pull anchor rod holes in the filling bag, penetrating counter-pull anchor rods through the reserved counter-pull anchor rod holes in the filling bag, and fastening the orifices of the counter-pull anchor rod holes at two ends of the counter-pull anchor rods extending out of the filling bag through nylon ribbons or fine iron wires respectively; a plurality of reinforcing steel bar ladder beams are arranged along the length direction of the reinforcing steel bar net, and the reinforcing steel bar ladder beams connect the counter-pulling anchor rods on the same vertical line to form a whole; fixing the reinforcing mesh at the end part of the filling area, and simultaneously drilling a single hydraulic prop for reinforcement;
fifthly, inserting the slurry mixing pipe into a filling bag after completing a mold erecting procedure of one shift;
sixthly, starting a grouting pump of the pulping equipment, continuously pulping, and continuously filling the slurry into the filling bag until the filling bag is filled with the slurry, wherein the top of the slurry is contacted with the top plate of the coal layer of the working face;
seventhly, after filling in each shift of formwork erecting procedure is completed, cleaning the pulping equipment and the pipeline;
eighthly, after 6 hours, removing the two rows of single hydraulic supports which finish the vertical mold procedure in the third step and simultaneously driving the single hydraulic supports arranged at the entry retaining roadway section for reinforcement in cooperation with the pi-shaped steel beams;
the ninth step, repeat the above-mentioned step, with the propulsion of the working face, begin the next cyclic filling, until the working face is finished to recover, the construction of entry retaining is finished;
as a further preferred of the invention, in the first step, a rhombic metal net or a polyester fiber net is laid on the front top plate of 3-4 hydraulic support frames close to the entry retaining roadway;
as a further optimization of the invention, in the second step, dense single hydraulic props or a plurality of gangue stopping supports are arranged in the filling area behind the hydraulic supports and on one side close to the goaf, the dense single hydraulic props or the plurality of gangue stopping supports are not used simultaneously, when the coal seam mining height is low, the working face coal seam roof is easy to maintain, and the mine pressure is not obvious, the dense single hydraulic props are used for maintaining the working face coal seam roof on one side close to the goaf in the filling area;
when the coal seam mining height is high, the working face coal seam roof is difficult to maintain, and the mine pressure is severe, a waste rock blocking support is adopted to maintain the working face coal seam roof on one side of the filling area close to the goaf;
if single hydraulic supports are used, the distance between every two adjacent single hydraulic supports is 400 mm;
if the waste rock blocking support is used, the waste rock blocking support needs to move forwards along with the hydraulic support at the end part of the working face;
as a further preferable mode of the invention, in the third step, two rows of single hydraulic props are arranged along two side surfaces of the roadside packing body in the length direction, wherein the distance between the adjacent single hydraulic props is less than or equal to 500 mm;
as a further optimization of the invention, in the fourth step, the counter-pull anchor rod passes through a counter-pull anchor rod hole reserved on the filling bag, and a tray and nuts are installed at the threads at the two sides of the counter-pull anchor rod;
as a further preferred aspect of the present invention, the slurry preparation apparatus includes a grouting pump and four mixing tanks, the grouting pump is connected to the two mixing tanks for sucking slurry through a slurry sucking pipe, the grouting pump is connected to the two mixing tanks for preparing slurry, and the four mixing tanks realize continuous slurry preparation and continuous filling; the grouting pump is communicated with the mixer through a slurry conveying pipe, the mixer is communicated with the filling bag through a slurry mixing pipe, and the slurry conveying pipe is used for double-liquid conveying and can convey slurry for a long distance; a back-up pump is also deployed.
Through the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the method provided by the invention has the advantages that one roadway is excavated, the preparation time of a working face is saved, the situation of shortage of taking over is relieved, the investment of a tunneling team is reduced, and the effect of reducing the labor cost is achieved;
2. the ventilation mode of the working face is optimized to form a Y-shaped ventilation mode with two inlets and one outlet, so that the problem of gas accumulation at the corner of the working face is solved, the propelling speed of the fully mechanized mining working face is greatly increased, and meanwhile, the Y-shaped ventilation mode changes return air from return air to inlet air in a crossheading way, so that the working environment of a roadway is improved;
3. the invention recovers all the coal pillars in the section, greatly improves the recovery rate of mining area resources and prolongs the service life of the mine;
4. the method provided by the invention recovers a large amount of coal pillar resources in the section and improves the economic benefit of the mine.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a block diagram of an example of the prior art with respect to not performing gob-side entry retaining;
fig. 2 is a schematic plan view of a method for high-water filling material roadside filling gob-side entry retaining in a preferred embodiment of the present invention;
fig. 3 is a schematic diagram of a specific process and a system of a roadside filling gob-side entry retaining method for a high-water filling material according to a preferred embodiment of the invention;
FIG. 4 is a schematic view of a reinforced supporting structure of the filling body provided by the present invention;
fig. 5 a-5 b are schematic views of the structure of the filling bag provided by the present invention, wherein fig. 5a is a perspective view and fig. 5b is a side view;
FIG. 6 is a schematic view of a pulping apparatus according to the present invention.
In the figure: the method comprises the following steps of 1, 2, 3, 4, a roadway retaining roadway, 5, a roadside filling body, 6, a diamond-shaped metal net or a polyester fiber net, 7, a hydraulic support (located between one side of the first working surface and one side of the goaf), 8, dense single hydraulic supports or two gangue-blocking supports, 9, single hydraulic supports (arranged in a filling area for arranging the roadside filling body), 10, anchor rods or anchor cables, 11, a mold protection single body, 12, single hydraulic supports (arranged in a roadway retaining roadway section in a matched mode for reinforcing), 13, a reinforcing mesh, 14, a counter-pulling anchor rod, 15, a reinforcing bar ladder beam, 16, 17, 18, a slurry suction pipe, 19, a slurry injection pump, 20, 21, a slurry conveying pipe, 22, a mixer, 23, and 24, wherein the mixer is a slurry mixing pipe and the filling bag.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
In the prior art, the fully mechanized mining face roadway is arranged in a manner of reserving section coal pillars, fig. 1 is a schematic diagram without gob-side entry retaining, so that the section coal pillars are required to be reserved on the lower face for crossheading again, that is, the mining face roadway is excavated again, no coal pillar mining can be realized no matter whether the section coal pillars are wide section coal pillars or narrow section coal pillars, so that all coal pillar resources can not be recovered to some extent, and the recovery rate of mining area resources is reduced; therefore, the present application aims to provide a high-water filling material roadside filling gob-side entry retaining method shown in fig. 3, which can achieve the purpose of high yield and high efficiency, and specifically comprises the following steps:
in the first step, a first working face 1 of the fully mechanized mining is supported by a hydraulic support 7, as can be seen from fig. 2 and fig. 3, the first working face and the goaf of the fully mechanized mining are located on the same side of a roadway retaining roadway 4, a plurality of hydraulic supports are sequentially erected between one side of the first working face and one side of the goaf, after the first working face is subjected to coal cutting and scraping plate conveyor, a diamond-shaped metal net or a polyester fiber net 6 is laid on a front top plate of 3-4 hydraulic support frames close to the roadway retaining roadway, and the hydraulic support of the first working face is pushed.
Secondly, arranging a roadside filling body 5 at one side of the gob 3, which is opposite to the second working surface 2, and arranging dense single hydraulic supports or two gangue-blocking supports 8 at one side of a filling area behind the hydraulic support and close to the gob, wherein the roadside filling body is used for maintaining a working surface coal seam roof at one side of the roadside filling body close to the gob; meanwhile, a plurality of single hydraulic struts 9 are arranged in a filling area for arranging the roadside filling bodies, and the single hydraulic struts are temporarily arranged to ensure the stability of the coal seam top plate of the working surface of the filling area and the safety of personnel operation;
the method is characterized in that the single hydraulic props or the waste rock blocking supports are not used simultaneously, when the coal seam mining height is low, the working face coal seam roof is easy to maintain, and the mine pressure is not obvious, dense single hydraulic props are adopted to maintain the working face coal seam roof on one side of a filling area close to a goaf, and the distance between every two adjacent single hydraulic props is 400 mm;
when the coal seam mining height is high, the working face coal seam roof is difficult to maintain, and the mine pressure is severe, a waste rock blocking support is adopted to maintain the working face coal seam roof on one side of the filling area close to the goaf, and if the waste rock blocking support is used, the waste rock blocking support needs to move forwards along with a hydraulic support at the end part of the working face.
In addition, whether roof anchor rods or anchor cables 10 need to be supported or not is determined according to the lithological condition of the coal seam roof on the working face of the filling area, and when the roof strip of the working face is not good and is easy to severely sink or even collapse, the anchor rods or the anchor cables are arranged to support the roof under the condition that the single hydraulic prop is firm in support and the operation safety of personnel is ensured.
And thirdly, cleaning a filling area after a sufficient filling distance is formed behind the hydraulic support, cleaning float coal and virtual slag in the filling area, exposing out the rock of the coal bed bottom plate, driving two rows of single hydraulic supports along two side surfaces of the length direction of the roadside filling body to form a mold protection single body 11, wherein the distance from the edge of the single hydraulic support close to the second working surface to the inner side edge of the other row of single hydraulic supports is the width of the roadside filling body, and the distance between the adjacent single hydraulic supports is less than or equal to 500mm, so that the roadside filling body is ensured to have a good forming effect in the filling process.
Fourthly, performing a first shift of formwork erecting process in a filling area to form a filler reinforced supporting structure (as shown in fig. 4), specifically, hanging a reinforcing mesh 13, sleeving a filling bag 24 (the top of the filling bag is also provided with a plurality of filling holes or exhaust holes, the diameter is 150mm, and the length is 600 mm) outside the whole reinforcing mesh structure, hanging the top of the filling bag on a coal seam top plate of a working face, hanging the filling bag through hanging wires, arranging a plurality of opposite-pull anchor holes on the filling bag, penetrating opposite-pull anchor rods 14 reserved on the filling bag, installing a tray and nuts at the threads at two sides of the opposite-pull anchor rods, and respectively fastening the opposite-pull anchor rod holes at two ends of the opposite-pull anchor rods extending out of the filling bag through nylon ties or thin iron wires to form a fastened part, the diameter is 60mm, and the length is 150 mm; a plurality of reinforcing steel bar ladder beams 15 are arranged along the length direction of the reinforcing steel bar net, and the reinforcing steel bar ladder beams connect the opposite-pulling anchor rods on the same vertical line to form a whole; then fixing the reinforcing mesh at the end of the filling area, and simultaneously drilling the single hydraulic prop for reinforcement.
And a fifth step of inserting the slurry mixing pipe 23 into the filling bag after completing the mold erecting process of one shift.
Sixthly, starting a grouting pump 19 of the pulping equipment to continuously pulp, and continuously filling the slurry into the filling bag until the filling bag is filled with the slurry, wherein the top of the slurry is contacted with the top plate of the coal layer of the working face; in actual operation, the filling material is a high-water filling material which is independently researched and produced by relying on the technology of Chinese mining university and Jiangsu Boxian mine science and technology limited company, and has the advantages of high resistance increasing speed, large supporting resistance and capability of being contracted in a proper amount.
And seventhly, cleaning the pulping equipment and the pipeline after filling in each shift of formwork erecting procedure is completed.
And eighthly, after 6 hours, removing the two rows of single hydraulic supports which finish the vertical mold procedure in the third step correspondingly, and simultaneously driving the single hydraulic supports 12 arranged at the entry retaining roadway section for reinforcement by matching with the Pi-shaped steel beam.
And ninthly, repeating the steps, starting the next circulation of filling along with the advancing of the working face until the mining of the working face is finished, and finishing the entry retaining construction.
Fig. 6 shows a preferred embodiment of the pulping apparatus provided by the present application, which includes a grouting pump and four mixing tanks, wherein the grouting pump is connected to two mixing tanks 16 for sucking pulp through a pulp sucking pipe 18, and the grouting pump is connected to two mixing tanks 17 for pulping, and the four mixing tanks achieve continuous pulping and continuous filling; the grouting pump is communicated with a mixer 22 through a slurry conveying pipe 21, the mixer is communicated with the filling bag through a slurry mixing pipe, and the slurry conveying pipe is used for double-liquid conveying and can realize long-distance slurry conveying; a back-up pump 20 is also arranged.
By adopting the gob-side entry retaining coal pillar-free mining technology, in the working face extraction process, the extraction roadway of the working face is retained by effective roadside support and in-roadway support technology and is used as an extraction roadway adjacent to the working face, the entry retaining roadway schematic diagram shown in fig. 2 is obtained, the purpose of twice use of one roadway is realized, one roadway is excavated from each working face less, so that the preparation time of the working face is greatly shortened, the phenomenon of insufficient mining replacement caused by the fact that adjacent working faces cannot be prepared in time after the extraction of the working face is finished is avoided, meanwhile, the number of mining lines on a mine can be reduced, and the productivity of a mine is improved.
The schematic diagram of the entry retaining roadway obtained from fig. 2 can also find that, in part of the prior art, the working face adopts a U-shaped ventilation structure shown in fig. 1, one of the two ways is used for supplying air and the other is used for returning air, for the working face of a high gas mine, gas is easy to accumulate at the upper corner of the working face, the propelling speed of the working face is affected, dust in the return air way is large, and the working environment of workers is poor, compared with the gob-side entry retaining coal-pillar-free mining technology adopted in fig. 3, both ways of the working face are used for supplying air, the entry retaining way is used for supplying auxiliary air in the way, the other is used for supplying main air in the way, the corner of the working face is fresh air, and dirty air is returned through the existing entry retaining section roadway, the cut hole of the adjacent working face and the way, so that the gas accumulation problem at the corner of the working face can be solved, the propelling.
When the section coal pillar is fully recovered, the economic benefit of the mine is also obviously improved.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" as used herein is intended to include both the individual components or both.
The term "connected" as used herein may mean either a direct connection between components or an indirect connection between components via other components.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. A method for filling gob-side entry retaining beside a high-water filling material roadway is characterized by comprising the following steps: the method specifically comprises the following steps:
firstly, a first working face of the fully mechanized mining is supported by a hydraulic support, after coal cutting and a push scraper conveyor are carried out on the first working face, a rhombic metal net or a polyester fiber net is laid on a front top plate of the hydraulic support frame close to a roadway, and a hydraulic support of the first working face is pushed;
secondly, arranging a roadside filling body at one side of the goaf relative to a second working surface, and arranging dense single hydraulic struts or two gangue-blocking supports at one side of a filling area behind the hydraulic support and close to the goaf, wherein the roadside filling body is used for maintaining a working surface coal seam roof at one side of the roadside filling body close to the goaf; meanwhile, a plurality of single hydraulic supports are arranged in a filling area where the roadside filling bodies are arranged, and the single hydraulic supports are temporarily arranged to ensure the stability of a coal seam top plate on a working surface of the filling area;
thirdly, cleaning a filling area after a sufficient filling distance is formed behind the hydraulic support, cleaning float coal and virtual slag in the filling area, exposing out of the coal seam bottom rock, driving two rows of single hydraulic supports along two side surfaces of the length direction of the roadside filling body to form a mold protection single body, wherein the distance from the edge of the single hydraulic support close to the second working surface to the inner side edge of the other row of single hydraulic supports is the width of the roadside filling body;
fourthly, performing a first class of formwork erecting procedure in a filling area to form a filler reinforced supporting structure, specifically hanging a reinforcing mesh, sleeving a filling bag outside the whole reinforcing mesh structure, hanging the top of the filling bag on a coal seam top plate on a working surface, arranging a plurality of counter-pull anchor rod holes in the filling bag, penetrating counter-pull anchor rods through the reserved counter-pull anchor rod holes in the filling bag, and fastening the orifices of the counter-pull anchor rod holes at two ends of the counter-pull anchor rods extending out of the filling bag through nylon ribbons or fine iron wires respectively; a plurality of reinforcing steel bar ladder beams are arranged along the length direction of the reinforcing steel bar net, and the reinforcing steel bar ladder beams connect the counter-pulling anchor rods on the same vertical line to form a whole; fixing the reinforcing mesh at the end part of the filling area, and simultaneously drilling a single hydraulic prop for reinforcement;
fifthly, inserting the slurry mixing pipe into a filling bag after completing a mold erecting procedure of one shift;
sixthly, starting a grouting pump of the pulping equipment, continuously pulping, and continuously filling the slurry into the filling bag until the filling bag is filled with the slurry, wherein the top of the slurry is contacted with the top plate of the coal layer of the working face;
seventhly, after filling in each shift of formwork erecting procedure is completed, cleaning the pulping equipment and the pipeline;
eighthly, after 6 hours, removing the two rows of single hydraulic supports which finish the vertical mold procedure in the third step and simultaneously driving the single hydraulic supports arranged at the entry retaining roadway section for reinforcement in cooperation with the pi-shaped steel beams;
and ninthly, repeating the steps, starting the next circulation of filling along with the advancing of the working face until the mining of the working face is finished, and finishing the entry retaining construction.
2. The method for high-water filling material roadside filling gob-side entry retaining of claim 1, characterized by: in the first step, a diamond-shaped metal net or a polyester fiber net is laid on the front top plate of 3-4 hydraulic support frames close to the entry retaining roadway.
3. The method for high-water filling material roadside filling gob-side entry retaining of claim 1, characterized by: in the second step, dense single hydraulic props or a plurality of gangue stopping supports are arranged in the filling area behind the hydraulic supports and on the side close to the goaf, the dense single hydraulic props or the plurality of gangue stopping supports are not used simultaneously, and when the coal seam mining height is low, the working face coal seam roof is easy to maintain, and the mine pressure is not obvious, the dense single hydraulic props are used for maintaining the working face coal seam roof on the side close to the goaf in the filling area;
when the coal seam mining height is high, the working face coal seam roof is difficult to maintain, and the mine pressure is severe, a waste rock blocking support is adopted to maintain the working face coal seam roof on one side of the filling area close to the goaf;
if single hydraulic supports are used, the distance between every two adjacent single hydraulic supports is 400 mm;
if the waste rock blocking support is used, the waste rock blocking support needs to move forwards along with the hydraulic support at the end part of the working face.
4. The method for high-water filling material roadside filling gob-side entry retaining of claim 1, characterized by: and thirdly, two rows of single hydraulic supports are arranged along two side surfaces of the roadside packing body in the length direction, wherein the distance between the adjacent single hydraulic supports is less than or equal to 500 mm.
5. The method for high-water filling material roadside filling gob-side entry retaining of claim 1, characterized by: and in the fourth step, the counter-pull anchor rod penetrates through a counter-pull anchor rod hole reserved in the filling bag, and the tray and the nut are installed at the threads on the two sides of the counter-pull anchor rod.
6. The method for high-water filling material roadside filling gob-side entry retaining of claim 1, characterized by: the pulping equipment comprises a grouting pump and four stirring barrels, wherein the grouting pump is connected with the two stirring barrels for sucking the pulp through a pulp sucking pipe, the grouting pump is connected with the two stirring barrels for pulping, and the four stirring barrels realize continuous pulping and continuous filling; the grouting pump is communicated with the mixer through a slurry conveying pipe, the mixer is communicated with the filling bag through a slurry mixing pipe, and the slurry conveying pipe is used for double-liquid conveying and can convey slurry for a long distance; a back-up pump is also deployed.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803110A (en) * | 2021-10-11 | 2021-12-17 | 山东科技大学 | Roadside filling and supporting method for gob-side entry retaining of large-dip-angle coal seam |
| CN114215591A (en) * | 2021-11-30 | 2022-03-22 | 中国矿业大学 | Method for filling gob-side entry retaining by mixing filling working face roadside gangue and ultrahigh water material |
| CN116857001A (en) * | 2023-07-27 | 2023-10-10 | 山西文龙中美环能科技股份有限公司 | Paste filling gob-side entry retaining construction method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289939A (en) * | 2008-06-10 | 2008-10-22 | 沈阳天安矿山机械科技有限公司 | Comprehensive support device for gob-side entry retaining |
| CN101424195A (en) * | 2008-01-23 | 2009-05-06 | 王岩 | Method and equipment for digging gangue and filling tunnel for coal mine coal-rock drift |
| CN101519977A (en) * | 2009-03-28 | 2009-09-02 | 中国矿业大学 | Method for fixing gob-side entry retaining roadside packing body on coal seam with big declined angle |
| CN103161480A (en) * | 2013-03-14 | 2013-06-19 | 中国矿业大学 | Method for actively supporting lane side filling gob-side entry retaining |
| CN103397905A (en) * | 2013-04-17 | 2013-11-20 | 唐建新 | System and method for achieving natural striding, falling and filling of coal beds, flexible roadway protection and complete gob-side entry retaining |
| CN103628911A (en) * | 2013-12-06 | 2014-03-12 | 中国矿业大学 | Fully-mechanized coal mining/ caving working face sectional type gob-side entry retaining method |
| CN104018837A (en) * | 2014-06-20 | 2014-09-03 | 中国矿业大学 | Spacing-filling gob-side entry retaining method for treating dinting gangue |
| AU2015377002A1 (en) * | 2015-01-14 | 2016-09-01 | China University Of Mining And Technology | Non-coal-pillar gob-side entry retaining method having filling-wall self-elimination |
| CN111485912A (en) * | 2020-03-31 | 2020-08-04 | 扬州中矿建筑新材料科技有限公司 | Gangue filling and cementing roadway retaining system and method |
-
2021
- 2021-01-26 CN CN202110101817.8A patent/CN112796757A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424195A (en) * | 2008-01-23 | 2009-05-06 | 王岩 | Method and equipment for digging gangue and filling tunnel for coal mine coal-rock drift |
| CN101289939A (en) * | 2008-06-10 | 2008-10-22 | 沈阳天安矿山机械科技有限公司 | Comprehensive support device for gob-side entry retaining |
| CN101519977A (en) * | 2009-03-28 | 2009-09-02 | 中国矿业大学 | Method for fixing gob-side entry retaining roadside packing body on coal seam with big declined angle |
| CN103161480A (en) * | 2013-03-14 | 2013-06-19 | 中国矿业大学 | Method for actively supporting lane side filling gob-side entry retaining |
| CN103397905A (en) * | 2013-04-17 | 2013-11-20 | 唐建新 | System and method for achieving natural striding, falling and filling of coal beds, flexible roadway protection and complete gob-side entry retaining |
| CN103628911A (en) * | 2013-12-06 | 2014-03-12 | 中国矿业大学 | Fully-mechanized coal mining/ caving working face sectional type gob-side entry retaining method |
| CN104018837A (en) * | 2014-06-20 | 2014-09-03 | 中国矿业大学 | Spacing-filling gob-side entry retaining method for treating dinting gangue |
| AU2015377002A1 (en) * | 2015-01-14 | 2016-09-01 | China University Of Mining And Technology | Non-coal-pillar gob-side entry retaining method having filling-wall self-elimination |
| CN111485912A (en) * | 2020-03-31 | 2020-08-04 | 扬州中矿建筑新材料科技有限公司 | Gangue filling and cementing roadway retaining system and method |
Non-Patent Citations (3)
| Title |
|---|
| 张雪峰: "3414工作面高水材料巷旁充填沿空留巷技术应用研究", 《煤炭科技》 * |
| 徐海兵: "高水材料巷旁充填沿空留巷技术在黑龙煤业的应用", 《内蒙古煤炭经济》 * |
| 武善元等: "薄煤层综采新型高水材料巷旁充填沿空留巷技术研究", 《煤炭工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113803110A (en) * | 2021-10-11 | 2021-12-17 | 山东科技大学 | Roadside filling and supporting method for gob-side entry retaining of large-dip-angle coal seam |
| CN113803110B (en) * | 2021-10-11 | 2023-11-03 | 山东科技大学 | Gob-side entry retaining roadside filling support method for large-dip-angle coal seam |
| CN114215591A (en) * | 2021-11-30 | 2022-03-22 | 中国矿业大学 | Method for filling gob-side entry retaining by mixing filling working face roadside gangue and ultrahigh water material |
| CN116857001A (en) * | 2023-07-27 | 2023-10-10 | 山西文龙中美环能科技股份有限公司 | Paste filling gob-side entry retaining construction method |
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