CN112081623A - Solid filling roadway filling process system and construction method - Google Patents
Solid filling roadway filling process system and construction method Download PDFInfo
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- CN112081623A CN112081623A CN202010961851.8A CN202010961851A CN112081623A CN 112081623 A CN112081623 A CN 112081623A CN 202010961851 A CN202010961851 A CN 202010961851A CN 112081623 A CN112081623 A CN 112081623A
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- filling
- grouting
- roadway
- blocking plate
- waste rock
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
Abstract
The invention provides a solid filling roadway filling and retaining process system and a construction method in order to realize direct roadway retaining in the solid filling process. The solid filling and roadway filling process system comprises a set of waste rock blocking and grouting equipment, such as a set of self-made telescopic high-strength waste rock blocking plate, a filling material stirrer, a high-pressure grouting machine, a grouting pipeline system and other equipment and the space-time coordination of the equipment. The main unique technology along the filling entry retaining comprises the steps of fixing a self-made waste rock blocking plate, directly performing high-pressure grouting entry retaining and the like, and the specific construction method comprises the steps of supporting the waste rock blocking plate, stirring grouting materials, inserting a grouting pipeline, performing high-pressure pump grouting operation and forming a roadside body. The process method not only can solve the problems of complex process and poor effect of traditional support modes such as waste rock bags and the like, but also can reduce equipment, cost and workload of independent filling and entry retaining operation, so that goaf filling operation and entry retaining operation are not interfered with each other, goaf filling bodies and roadside filling bodies can be kept to be closely connected, cooperatively integrated and jointly supported, and the effect of achieving two purposes of filling and entry retaining is achieved.
Description
Technical Field
The invention belongs to the technical field of solid filling green mining in the coal industry.
Background
The gangue solid filling technology becomes an important green mining technology for solving the problem of coal pressing under three conditions and improving the environment of a mining area, and is widely applied due to the social benefit, the economic benefit and the environmental benefit. In the conventional filling of coal mines, a filling support of 'front mining and rear filling' is often adopted, so that the solid filling can realize the synchronous integrated operation of mining and filling, and the method is favorable for the condition that no roadway is left on the two sides of a long working face.
However, if a direct entry retaining is performed in a solid filling stope, the gangue filling body on one side of the roadway is loose, no cohesive force exists among particles, independence and stability of the gangue filling body cannot be maintained, the sinking pressure of a top plate cannot be effectively borne and supported, and the collapse and scattering phenomena occur. In the existing waste filling entry retaining technology, an earlier entry retaining method adopts waste bagging and is stacked on one side of a roadway to play a supporting role. The method increases the labor capacity of workers, has serious material waste, high cost and poor supporting effect, and is applied less at present. In recent years, a novel solid filling cementing roadway retaining method (Chinese patent, publication number: CN111485912A) appears, the method adopts a waste rock throwing grouting and independent wall forming mode for roadway retaining, the method is greatly improved relative to waste rock bag support, but the end roadway retaining operation and goaf filling operation are independent and interfere with each other, not only are the workload and the operation potential safety hazard increased, but also the goaf filling compaction rate is influenced, so that the later roadway retaining effect is poor, meanwhile, a set of roadway retaining equipment is added, the production cost is improved, and the filling benefit is reduced.
When the 'front mining and rear filling' operation of a solid filling working face is carried out to the end, how to safely and effectively reserve a roadway, reduce the workload and improve the filling benefit becomes a big problem faced by solid filling.
Disclosure of Invention
In order to solve the problems of high difficulty and low benefit of solid filling and retaining, the invention provides a set of gangue solid along filling and retaining process design and a construction method thereof, namely, gangue solid materials are directly solidified and enhanced along the edge of a mining and filling area to form a high-strength roadside support body with a certain width, and the support body and a goaf filling body are cooperated to control the top and maintain a roadway, so that the effect of filling and retaining two purposes can be achieved.
The invention provides the following technical scheme:
a system for filling solid along the filling and retaining roadway is composed of a set of gangue blocking and grouting units, such as a set of telescopic high-strength gangue blocking plate, a filling material stirrer, a high-pressure grouting machine, a grouting pipeline system, and their space-time coordination. The concrete parameters of the stirring machine, the grouting machine and other equipment can be reasonably selected and assembled according to the engineering field condition, the material pump injection performance and the like, and the equipment can be matched well.
The telescopic high-strength waste rock blocking plate is designed and manufactured according to coal mining conditions and according to local conditions, specific parameters such as the telescopic height, the thickness of the waste rock blocking plate, the position of a grouting hole and the like are designed and manufactured automatically, the surface of the waste rock blocking plate is as smooth and flat as possible, and slurry adhesion is avoided. The waste rock blocking plate mainly comprises a base wall, a telescopic plate, a built-in jack and the like. The base wall is arranged at the lower part and mainly plays a role of foundation support and bedding, and the expansion plate is arranged at the upper part and mainly plays a role of abutting against the top and blocking the filling material at the upper part of the base wall from overflowing. The middle part of the base wall is manufactured into a U-shaped groove, and two sides of the U-shaped groove are respectively welded with a limiter to limit the left and right displacement of the expansion plate. 3-4 jacks are fixed in the groove of the basement wall, and liquid injection holes of the jacks are drilled on the outer side of the groove of the basement wall according to the positions of the jacks. The expansion plate is provided with a plurality of U-shaped grooves according to the number of jacks, the whole expansion plate is similar to an m shape, and the jacks are in one-to-one correspondence with the expansion plate grooves so as to be sleeved in the expansion plate grooves. The length of the waste rock blocking plate can be 2-3 filling steps, and the telescopic height of the telescopic plate is controlled by a jack. After the extension plate is completely extended, the total height of the extension plate and the base wall is basically equal to the height of a filling body or the height of a filling working surface, the waste rock blocking plate can be connected with the top and the bottom, and the height of the base wall is not less than 60-70% of the height of the filling body or the height of a mining height so as to adapt to the change of the mining height. The thickness of the gangue blocking plate depends on the lateral pressure applied by the filling material in the field filling and tamping process, and the strength of the gangue blocking plate is not less than the maximum lateral pressure of the gangue blocking plate. In order to ensure that the grouting of the roadside body material is more full and the pump grouting effect is better, the flow direction of the slurry material under the action of self weight is considered, the position of a grouting hole drilled in the waste rock blocking plate is not lower than 80% of the height of the filling body, and the distance between every two adjacent grouting holes is smaller than the grouting radius under corresponding conditions.
The general process flow of the solid filling roadway filling along the filling roadway is as follows: the method comprises the steps of firstly erecting a telescopic high-strength waste rock blocking plate on the roadway side at the end of a working face, and then carrying out conventional solid filling processes from the end of the working face, namely waste rock leakage and tamping until a filling body is tightly connected with a top. When the gangue leakage-tamping filling operation is carried out to the middle position of the working face, the high-pressure pumping operation is carried out at the position of the end roadway, the grouting is stopped when the grout seeps out from the bottom of the filling body, and the rest is done by analogy, and the next grouting operation is carried out. And after the grouting of the filling body in a certain distance range at the roadway side is finished, keeping for a period of time, drying and solidifying the slurry, moving the waste rock blocking plate to the end roadway retaining side of the next filling working surface, and performing the next roadway retaining operation.
The construction method comprises the following steps: the waste rock blocking plate is fixedly placed at the edge of a gob on one side of the retained roadway, the built-in jack is filled with liquid, the expansion plate is extended, the waste rock blocking plate can be closely connected with the top and the bottom, and the material is prevented from overflowing and can resist the lateral pressure applied by the filling material. After the gangue leakage-tamping filling operation is started, a stirrer in the retained roadway is started, and grouting materials prepared in advance are stirred and mixed uniformly according to a certain proportion, wherein the filling materials have certain fluidity, pumpability and timeliness. When the gangue leakage-tamping filling operation is carried out to the middle position of a working face, a high-strength grouting perforated pipe is inserted into the filling body from a gangue blocking plate grouting hole, the insertion length is generally more than 90% of the width of the roadside body, and the process is to prevent the hollow space of the perforated pipe from being blocked by filling materials. And then starting grouting equipment such as a high-pressure pump, a grouting machine and the like, slowly pumping at low pressure and low flow rate at the beginning, pumping at high pressure and high flow rate after the pipeline is smooth, and paying attention to the surrounding situation at any moment in the pumping process to prevent accidents. During grouting, the solid filling material is filled and compacted from top to bottom and from left to right as far as possible, so that solid particles can be bonded at the same time when the slurry fills gaps of the material. And when the grout flows out from the bottom of the filling body, closing the high-pressure pump and the grouting machine, pulling out the grouting pipe, cleaning the grouting pipeline, and then performing grouting work of the next grouting hole according to the flow. After the whole grouting work is finished, keeping for a period of time according to the current situation, enabling the grout to fully solidify the filling material and increase the strength of a filling body, finally removing the waste rock blocking plate 7, moving to the next filling grouting position, and then performing the waste rock blocking grouting operation.
As a preferred technical scheme, a jack is arranged in a U-shaped groove of the bottom wall of the telescopic high-strength waste rock blocking plate base, and the jack is sleeved in an m-shaped groove of the telescopic plate.
As a preferred technical scheme of the invention, the upper part of the bottom wall of the telescopic high-strength waste rock blocking plate base is drilled with a grouting hole, and the two sides of the U-shaped groove are welded with limiters.
As a preferred technical scheme of the invention, the solid filling along-filling roadway-retaining process system mainly comprises a waste rock blocking and grouting process and equipment thereof.
As a preferred technical scheme of the invention, the construction method along the filling and retaining roadway mainly comprises the steps of supporting a waste rock blocking plate, conventional solid filling, stirring filling materials and high-pressure pumping operation.
The invention has the following advantages:
the invention has certain innovativeness, practical feasibility and operability, is convenient to operate, is simple and easy to implement, saves cost, reduces the labor workload of workers, has good gangue blocking effect, reduces expensive equipment (such as gangue throwing equipment and the like) and complex procedures of independent roadway retaining operation and potential safety production hazards (such as splashing of gangue in the gangue throwing process and the like) in the complicated operation process, can retain the roadway only by taking measures of gangue blocking, grouting and the like, improves the filling and roadway retaining efficiency, and has good economic and applicable effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a telescopic high-strength gangue blocking plate.
Fig. 2 is a schematic view of a solid-filling roadway-filling process system.
Fig. 3 is a right side view of fig. 2.
In the figure: 1. a foundation wall; 2. a retractable plate; 3. a stopper; 4. a liquid injection hole; 5. grouting holes; 6. a jack; 7. a waste rock blocking plate; 8. a blender; 9. grouting machine; 10. grouting pipelines; 11. filling a bracket; 12. a roadway; 13. a filler body; 14. a coal seam; 15. directly ejecting; 16. an overburden; 17. directly to the bottom.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 1, a telescopic high-strength gangue blocking plate is mainly composed of a foundation wall 1, a telescopic plate 2 and a built-in jack 6. The base wall 1 is arranged at the lower part and mainly plays a role of foundation support and bedding, and the expansion plate 2 is arranged at the upper part and mainly plays a role of roof contact and preventing the filling material at the upper part of the base wall 1 from overflowing. The upper part of the base wall 1 is manufactured into a U-shaped groove, and two sides of the U-shaped groove are respectively welded with a limiting stopper 3 to limit the left and right displacement of the expansion plate 2. 3-4 jacks 6 are fixed in the groove of the basement wall 1, and liquid injection holes 4 of the jacks 6 are drilled on the outer side of the groove of the basement wall 1 according to the positions of the jacks 6. A plurality of U-shaped grooves are formed in the expansion plate 2 according to the number of jacks 6, the whole expansion plate 2 is similar to a m shape, and the positions of the jacks 6 correspond to the grooves of the expansion plate 2 one by one, so that the jacks 6 are sleeved in the grooves of the expansion plate 2. The length of the waste rock blocking plate 7 can take 2-3 filling steps, and the telescopic height of the telescopic plate 2 is controlled by a jack. After the extension plate 2 is fully extended, the total height of the extension plate and the base wall 1 is basically equal to the height of a filling body or the height of a filling working surface, and the waste rock blocking plate 7 can be connected with the top and the bottom, wherein the height of the base wall 1 is not less than the height of the filling body or 60-70% of the mining height so as to adapt to the change of the mining height. The thickness of the waste rock blocking plate 7 depends on the lateral pressure applied by filling materials in the field filling and tamping process, and the strength of the blocking plate is not less than the maximum lateral pressure of the blocking plate. In order to ensure that the grouting of the roadside body material is more full and the pump grouting effect is better, the flow direction of the slurry material under the action of the dead weight is considered, the position of the grouting hole 5 drilled in the expansion plate 2 is not lower than 80% of the height of the filling body, and the distance between every two adjacent grouting holes 5 is smaller than the grouting radius under the corresponding condition.
Example two
When the solid filling is along filling the entry retaining, the waste rock blocking plate 7 is fixedly placed at the edge of a goaf on one side of the entry retaining, the built-in jack 6 is filled with liquid, the expansion plate 2 is extended, the waste rock blocking plate 7 can be closely connected with the top and the bottom, and the material is prevented from overflowing and can resist the lateral pressure applied by the filling material. After the gangue leakage-tamping filling operation is started, a stirrer 8 in the retained roadway is started, and grouting materials prepared in advance are stirred and mixed uniformly according to a certain proportion, wherein the filling materials have certain fluidity, pumpability and timeliness. When the gangue leakage-tamping filling operation is carried out to the middle position of a working face, the high-strength grouting pipeline 10 is inserted into the filling body from the gangue blocking plate grouting hole 5, the insertion length is generally more than 90% of the width of the roadside body, and the grouting pipeline 10 is prevented from being blocked by filling materials in the process. And then starting grouting equipment such as a high-pressure pump grouting machine 9 and the like, slowly pumping at low pressure and low flow rate at the beginning, pumping at high pressure and high flow rate after the pipeline is smooth, and paying attention to surrounding conditions at any time in the pumping process to prevent accidents. During grouting, the solid filling material is filled and compacted from top to bottom and from left to right as far as possible, so that solid particles can be bonded at the same time when the slurry fills gaps of the material. And when the grout flows out from the bottom of the filling body, closing the high-pressure pump grouting machine 9, pulling out the grouting pipe, cleaning the grouting pipeline 10, and then performing grouting operation of the next grouting hole 5 according to the flow. After the whole grouting work is finished, keeping for a period of time according to the current situation, enabling the grout to fully solidify the filling material and increase the strength of a filling body, finally removing the waste rock blocking plate 7, moving to the next filling grouting position, and then performing the waste rock blocking grouting operation.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A telescopic high-strength gangue blocking plate mainly comprises a base wall, a telescopic plate, a built-in jack and the like. The basement wall is in the lower part, and the expansion plate is in the upper portion, and the jack is connected basement wall and expansion plate.
2. The telescopic high-strength waste rock blocking plate as claimed in claim 1, wherein a U-shaped groove is formed in the middle of the base wall (8), two stoppers are welded to two sides of the U-shaped groove respectively, and the telescopic plate is sleeved in the base wall.
3. The telescopic high-strength waste rock blocking plate according to claim 1, wherein a plurality of U-shaped grooves are formed in the telescopic plate according to the number of jacks, the whole telescopic plate is similar to an m shape, and the jacks are arranged in one-to-one correspondence with the telescopic plate grooves so that the jacks are sleeved in the telescopic plate grooves.
4. The telescopic high-strength gangue blocking plate according to claim 1, wherein the total height of the telescopic plate after being fully extended and the base wall is basically equal to the height of a filling body or the height of a filling working surface, and the gangue blocking plate can be connected with a top and a bottom, wherein the height of the base wall is not less than 60-70% of the height of the filling body or the mining height.
5. The telescopic high-strength gangue blocking plate according to claim 1, wherein grouting holes are drilled in the gangue blocking plate, the positions of the grouting holes are not less than 80% of the height of a filling body, and the distance between every two adjacent grouting holes is smaller than the grouting radius under the corresponding condition.
6. The general process flow of the solid filling roadway filling along the filling roadway is as follows: and (3) firstly, erecting a telescopic high-strength waste rock blocking plate at the roadway retaining side of the end head of the working face, then carrying out a conventional solid filling process from the end head of the working face, then carrying out high-pressure pump grouting operation at the roadway position of the end head, stopping grouting, and so on to carry out the next grouting operation.
7. The general process flow of solid filling along a filling and retaining roadway according to claim 8, wherein after the fixed waste rock blocking plate is erected, high-pressure pumping operation is directly performed on the solid filling material in the goaf.
8. The solid filling and roadway filling construction method includes the steps of fixedly placing a waste rock blocking plate at the edge of a goaf on one side of a roadway, injecting liquid into an internal jack, and extending a telescopic plate to enable the waste rock blocking plate to be closely connected with the top and the bottom. After the gangue leakage-tamping filling operation is started, a stirrer in the retained roadway is started, and the grouting materials prepared in advance are stirred and mixed uniformly according to a certain proportion. When the gangue leakage-tamping filling operation is carried out to the middle position of a working face, the high-strength grouting perforated pipe is inserted into the filling body from the gangue blocking plate grouting hole, and the insertion length is generally more than 90% of the width of the roadside body reserved. And then starting grouting equipment such as a high-pressure pump, a grouting machine and the like, slowly pumping at low pressure and low flow rate at the beginning, pumping at high pressure and high flow rate after the pipeline is smooth, and paying attention to the surrounding situation at any moment in the pumping process to prevent accidents. During grouting, the slurry is used for filling and compacting the solid filling material from top to bottom and from left to right. And when the grout flows out from the bottom of the filling body, closing the high-pressure pump and the grouting machine, pulling out the grouting pipe, cleaning the grouting pipeline, and then performing grouting work of the next grouting hole according to the flow. After the whole grouting work is finished, keeping for a period of time according to the current situation, enabling the grout to fully solidify the filling material and increase the strength of a filling body, finally removing the waste rock blocking plate 7, moving to the next filling grouting position, and then performing the waste rock blocking grouting operation.
9. The solid-filling roadway-filling construction method according to claim 10, wherein the method comprises the steps of supporting a roadway gangue-retaining plate-working face conventional filling-roadway stirring grouting material-inserting a grouting pipeline-high-pressure pumping operation-roadside body forming.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010961851.8A CN112081623A (en) | 2020-09-14 | 2020-09-14 | Solid filling roadway filling process system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010961851.8A CN112081623A (en) | 2020-09-14 | 2020-09-14 | Solid filling roadway filling process system and construction method |
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| CN112081623A true CN112081623A (en) | 2020-12-15 |
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| CN202010961851.8A Pending CN112081623A (en) | 2020-09-14 | 2020-09-14 | Solid filling roadway filling process system and construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664266A (en) * | 2021-01-04 | 2021-04-16 | 安徽理工大学 | Underground compressed block stacking type filling system and method |
| CN113339052A (en) * | 2021-05-24 | 2021-09-03 | 中国矿业大学 | High-water-material grout stopping wall goaf filling method |
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| 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 |
| CN101818648A (en) * | 2010-04-30 | 2010-09-01 | 河南理工大学 | Roadside extrusion forming template filled by gangue |
| CN204082189U (en) * | 2014-07-09 | 2015-01-07 | 莱芜市万祥矿业有限公司 | Cash radical occlusion device is flown in large tilt angle compound mining timbering machine road |
| CN206220987U (en) * | 2016-09-29 | 2017-06-06 | 山东科技大学 | A kind of isolation of gob side entry retaining lane side and suspension device |
| CN109854288A (en) * | 2019-03-21 | 2019-06-07 | 山东矿机华能装备制造有限公司 | Gangue stopping device |
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2020
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Patent Citations (5)
| 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 |
| CN101818648A (en) * | 2010-04-30 | 2010-09-01 | 河南理工大学 | Roadside extrusion forming template filled by gangue |
| CN204082189U (en) * | 2014-07-09 | 2015-01-07 | 莱芜市万祥矿业有限公司 | Cash radical occlusion device is flown in large tilt angle compound mining timbering machine road |
| CN206220987U (en) * | 2016-09-29 | 2017-06-06 | 山东科技大学 | A kind of isolation of gob side entry retaining lane side and suspension device |
| CN109854288A (en) * | 2019-03-21 | 2019-06-07 | 山东矿机华能装备制造有限公司 | Gangue stopping device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664266A (en) * | 2021-01-04 | 2021-04-16 | 安徽理工大学 | Underground compressed block stacking type filling system and method |
| CN113339052A (en) * | 2021-05-24 | 2021-09-03 | 中国矿业大学 | High-water-material grout stopping wall goaf filling method |
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