CN109184784B - Fully-mechanized coal gangue synchronous filling system and method based on coal mining collapse degree reduction - Google Patents
Fully-mechanized coal gangue synchronous filling system and method based on coal mining collapse degree reduction Download PDFInfo
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- CN109184784B CN109184784B CN201810802256.2A CN201810802256A CN109184784B CN 109184784 B CN109184784 B CN 109184784B CN 201810802256 A CN201810802256 A CN 201810802256A CN 109184784 B CN109184784 B CN 109184784B
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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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
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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
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
Abstract
The invention belongs to the technical field of environment protection of underground coal resource green mining, and discloses a fully-mechanized coal gangue synchronous filling system and a fully-mechanized coal gangue synchronous filling method based on reduction of coal mining collapse degree, wherein coal and gangue are separated through specific gravity difference of the coal and the gangue and a dry-method skip sorting machine sorting technology, and the gangue enters an automatic gangue conveying belt; the coal gangue is filled into a goaf which is formed by fully mechanized mining behind a hydraulic support and is not overflowed by a linkage scraper at the rear side of a self-moving fully mechanized mining hydraulic support by a long-wall coal mining method, and the coal gangue is synchronously filled into the goaf of the self-moving fully mechanized mining hydraulic support while coal mining is carried out. The method reduces the caving amount of the overlying rocks in the goaf, directly or indirectly reduces the damage degree of underground coal mining surface subsidence, and realizes the sustainable development target of green development of coal resource development and mine ecological environment protection.
Description
Technical Field
The invention belongs to the technical field of underground coal mining environment protection, and particularly relates to a fully-mechanized coal gangue synchronous filling system and method based on coal mining collapse degree reduction. In particular to a fully-mechanized coal gangue synchronous filling system and a fully-mechanized coal gangue synchronous filling method based on reducing coal mining subsidence degree and coal gangue land occupation pollution environment.
Background
Currently, the current state of the art commonly used in the industry is such that:
after underground mining of coal resources, (1) a certain goaf space is formed underground, overlying rock pressure cannot be supported by top rock, and the overlying rock falls, cracks and sinks and deforms, and the land surface shows that a basin, a ground crack and a sink are collapsed on the ground, cultivated land is damaged, and ground surface buildings crack or collapse, and the highway and railway sink and deform to endanger traffic safety and the like; (2) the water in the aquifer or surface water leaks to the bottom plate of the goaf due to the development of a water-flowing fractured zone, so that the underground water level is reduced, the well spring is dry, people and livestock have difficulty in drinking water, and plants originally living by using underground water or surface water die or the types of vegetation change; (3) after the fully mechanized underground coal is mined, the coal gangue or the sorted coal gangue is mixed, and because of the limitation of the traditional technical process, the coal gangue cannot be lifted to the ground surface, and is accumulated to form a coal gangue dump or a coal gangue pile, so that the occupied land is occupied, the natural pollution to the atmospheric environment by the coal gangue is caused, the visual landscape is influenced, and the like. The geological environment problems of three major types of mines in coal mine areas are collapse of coal mine ground, destruction of aquifers and environment pollution caused by coal gangue occupation.
The collapse of the earth surface of a coal area is reduced and lightened, and the occupation of the coal gangue is a great environmental problem which must be solved by coal mine enterprises. Firstly, the coal gangue is actively adopted to directly fill a goaf without leaving a well, and the space of the goaf is reduced, so that the overlying rock caving degree of the goaf is reduced, and the subsidence degree and the damage of the surface of the goaf are fundamentally reduced; (2) and secondly, implementing comprehensive collapse treatment on the mined-out ground subsidence area, such as passive treatment technical methods of coal gangue backfill subsidence area, crack backfill, bottom pad excavation and height pad excavation, and the like.
The goaf formed by directly filling the coal gangue in the underground production process is adopted, so that the method has the advantages of reducing the lifting cost for coal gangue going out of a well, reducing land acquisition cost for stacking the coal gangue, reducing the treatment cost for naturally polluting atmospheric water and soil environment by the coal gangue, reducing the land reclamation cost for the coal gangue, reducing the treatment cost for ground surface subsidence and the like. The coal gangue is a green mining technology (coal resources are mined and environmental damage is reduced) without leaving a well and directly filling a goaf, and the coal gangue is an important method technology for coal mining and environmental protection at present and in future.
The comprehensive mechanized coal mining (comprehensive mining) is the most main mining technology of the coal mine at present, compared with the eliminated room-and-pillar coal mining technology, the comprehensive mechanized coal mining (comprehensive mining) has the advantages of improving the coal resource mining efficiency of a working face, high resource recovery rate and high underground production safety guarantee degree, but because the length of the comprehensive mining working face is 100-300 meters, the propelling length is 1000-3000 meters and the thickness of a mining coal layer is 2-8 meters (the humanoid volumetric comprehensive mining technology is just like cutting bean curd blocks), the goaf space (100-300 meters) left by a single working face after mining (1000-3000 meters) is 2-8 meters, and the space is at least 20-720 ten thousand meters3The large-span excavation working face causes overlying rocks of sedimentary rock layers above a coal seam to form a caving zone, a fissure zone and a bending zone, large-area ground subsidence basins, ground cracks and the like are formed on the ground surface, and aquifers, ground surface buildings, cultivated lands and the like above a chain raw coal layer seriously affect the geological environment of a mine, so that the large-span excavation working face is a large environmental problem of fully-mechanized coal mining.
At present, no coal gangue filling equipment system is constructed behind a self-moving fully-mechanized mining hydraulic support of a comprehensive mechanized coal mining machine. After the self-moving fully-mechanized mining hydraulic equipment moves forward, overlying rocks in a goaf behind the self-moving fully-mechanized mining hydraulic equipment collapse to form loose self-filling, and subsequently produced coal gangue cannot fill a caving space, so that the fully-mechanized mining formed coal gangue either fills a waste coal transportation roadway or is lifted to the ground to be stacked to form a coal gangue dump.
The method is a technical process for subsequent filling after coal mining, mainly aims at the goaf existing in room and pillar type mining, has the characteristics of high cost (drilling and hole forming) and low efficiency, and is not suitable for temporary goaf space filling formed by comprehensive mechanized mining (no goaf exists after the goaf collapses because of a top plate).
In summary, the prior art process has the following problems:
(1) in the prior art, fully mechanized coal mining gangue cannot fill a goaf. The fully mechanized mining face is pushed forward to form a goaf for a period of time, self-filling is formed due to collapse of roof overlying rocks, the goaf space is not filled subsequently, and environmental problems of ground collapse and chain generation of the goaf space are caused.
(2) The lagging (time desynchronization) of the coal gangue filling time. After most of the existing coal gangue filling goafs are room-and-pillar goafs, a technical process of back filling (filling after a period of coal mining, and having time lag) is adopted, and the coal gangue piles which are produced from the well before are conveyed to the underground goafs through a vertical shaft, an inclined shaft, a vehicle, a belt, a pipeline and the like; or waste haulage roadways formed by fully mechanized mining.
(3) The filling cost is high. The coal gangue which is already produced is broken and transported to be put into the well, and the cost is obviously higher than that of underground in-situ filling.
(4) The coal gangue occupies the land and pollutes the environment. The coal gangue can be piled up on the ground to occupy land, the environment is polluted by spontaneous combustion, land acquisition and reclamation costs are increased, and the like.
The difficulty and significance for solving the technical problems are as follows:
(1) and constructing a synchronous linkage coal gangue automatic filling device and a technical process, and synchronously mining coal and synchronously filling a goaf by coal gangue. When fully-mechanized coal mining is carried out, a goaf formed by synchronous filling of coal gangue needs to be provided, so that devices synchronously linked with the self-moving fully-mechanized coal mining hydraulic support, such as coal gangue sorting equipment, a gangue conveying belt, a gangue scraper device and the like, are required, and the problem is that synchronous linkage equipment is added.
(2) The coal gangue does not go out of the well and fills a goaf, thereby reducing ground subsidence and the significance of coal gangue pollution on the environment. The green mining technology and the device for fully mechanized coal mining and synchronous filling of coal gangue are innovated, the overlying strata caving degree, the damage of a water-bearing layer, the ground collapse, the damage degree of a building and the like caused by chain growth are reduced, the effects of lifting the ground by the coal gangue, stacking the occupied land, polluting the environment and the like are reduced, the purpose of sustainable development of black coal and green mining is realized, and the economic benefit of a coal mine is increased.
The natural mining of the Jinshan Yinshan, green coal and black coal is necessary for the environment protection of the coal mine, and the coal gangue does not go out of the well and the synchronous filling of the goaf is the way the green coal mining tends to go, so the fully-mechanized coal gangue synchronous filling system and method based on the reduction of coal mining collapse degree have important practical value.
Disclosure of Invention
The invention provides a fully-mechanized coal gangue synchronous filling technical system and method based on reducing coal mining subsidence and reducing coal gangue environmental effects, and aims to solve the technical problems that after all caving methods of coal mining in the fully-mechanized coal mining technical process are adopted, the caving rocks in a goaf are filled, no space is filled by coal gangue, and caving collapse is serious.
The core of the invention is that the gangue formed in the mining process is synchronously filled into the goaf behind the fully mechanized coal mining face, and the green mining technology that the gangue is not discharged from the well and the goaf is filled is achieved while the space of the goaf is reduced.
The method is realized in such a way that the fully mechanized coal gangue synchronous filling method based on coal mining collapse degree reduction comprises the following steps:
separating coal and coal gangue by a dry-method skip sorting machine according to the specific gravity difference of the coal and the coal gangue, and enabling the coal gangue to enter an automatic gangue conveying conveyor belt;
and filling coal gangue into a goaf, which is formed by fully mechanized mining behind the hydraulic support and has no caving, by a linkage scraper at the rear side of the self-moving fully mechanized mining hydraulic support for fully mechanized mining by a long-wall coal mining method, so as to form the goaf which can simultaneously mine coal and simultaneously fill the generated coal gangue into the self-moving fully mechanized mining hydraulic support.
Further, the fully-mechanized coal gangue synchronous filling method based on reduction of coal mining collapse degree specifically comprises the following steps:
the method comprises the following steps that firstly, coal gangue mined from a coal seam top plate, a coal seam bottom plate and an interlayer of coal in the coal mining process of a fully mechanized coal mining machine is automatically separated through a dry-process skip gangue separator through the specific gravity difference of the coal and the gangue, and the coal gangue enters an automatic gangue conveying conveyor belt;
step two, the gangue is automatically conveyed to a goaf behind the self-moving fully-mechanized mining hydraulic support through an automatic gangue conveying conveyor belt, and the gangue moves in a coordinated linkage manner along with the self-moving fully-mechanized mining hydraulic support and is sequentially accumulated in the goaf;
pushing the coal gangue to be flat through a telescopic coordinated linkage gangue scraper device at the rear side of the self-moving fully-mechanized mining hydraulic support;
and step four, coal gangue is sequentially accumulated in a goaf behind the self-moving fully-mechanized hydraulic support along with forward advancing coal mining of the fully-mechanized working face, coal mining, coal transporting and coal gangue synchronous filling are carried out, and the coal gangue is not discharged out of the well. The defects that coal mining is carried out while coal gangue needs to be transported to the ground surface to be accumulated, the land occupation is polluted, and the reclamation cost is increased in the past are overcome.
Another object of the present invention is to provide a fully-mechanized coal gangue synchronous filling system based on coal mining subsidence reduction by using the fully-mechanized coal gangue synchronous filling method based on coal mining subsidence reduction, which is provided with: the self-moving fully-mechanized mining hydraulic support;
the self-moving fully-mechanized mining hydraulic support is connected with a dry-method skip gangue sorter through a No. II connecting point;
the dry method skip gangue sorter is connected with the coal conveying automatic conveying conveyor belt through a No. III connecting point;
the dry method skip gangue sorter is connected with the gangue automatic conveying conveyor belt through a No. IV connecting point;
the scalable linkage gangue scraper conveyor is connected with the self-moving fully-mechanized mining hydraulic support through a I-shaped connection point.
The invention also aims to provide coal resource underground mining equipment which is provided with the fully-mechanized coal gangue synchronous filling system for reducing coal mining collapse degree and reduces the occupied land environment of coal gangue.
The YDT series movable sieve jigger or the Jiuhuayang dry method coal gangue separator is added at the side of the self-moving type fully-mechanized mining hydraulic support, after coal and coal gangue are automatically separated, the coal gangue enters a belt conveyor (RH-PDSSJ) for automatically conveying the coal gangue, and the coal gangue is automatically conveyed to a temporary goaf at the rear side of the self-moving type fully-mechanized mining hydraulic support through an automatic coal gangue conveying conveyor belt; pushing the coal gangue to be flat through a telescopic and coordinated gangue scraper at the rear side of the self-moving fully-mechanized mining hydraulic support; with the forward advance of the fully mechanized mining face, the coal gangue is sequentially accumulated in the goaf behind the self-moving fully mechanized mining hydraulic support, and the technical process of mining, transporting coal and synchronously filling the goaf with the coal gangue is formed.
The fully-mechanized coal gangue synchronous filling system is characterized in that the coal gangue synchronous filling system, a self-moving fully-mechanized hydraulic support, a retractable and coordinative linkage gangue scraper conveyor and a gangue automatic conveying conveyor belt are integrated in the fully-mechanized coal mining process.
In summary, the advantages and positive effects of the invention are:
(1) the coal gangue is synchronously filled in a goaf formed by the fully mechanized coal mining face, and the coal gangue occupies a certain goaf, so that the goaf space after coal mining is reduced, overlying rocks above a coal bed fall under the supporting action of the coal gangue, the rock amount of the overlying rocks fall is reduced, the collapse degree is reduced, and the environmental problems of aquifer damage, cultivated land damage, traffic damage, building damage and the like caused by ground collapse and chain growth and the treatment cost are reduced. According to the coal gangue amount of different coal mines, the coal gangue filling goaf can reduce the ground subsidence by 10-25%, so that in intensive cultivated land areas such as Xuzhou, Anhui Huaibei and Huainan in Jiangsu, the situation that a large amount of cultivated land becomes water accumulation basins due to ground subsidence and seriously restricts coal mining can be reduced, and the significance is very important.
(2) Coal gangue formed in the coal mining process does not go out of a well, so that series expenses are saved: the cost for lifting the coal gangue to the ground, the cost for gathering the piled coal gangue, the cost for self-igniting and extinguishing the coal gangue, the cost for treating the leaching polluted water and soil environment, the cost for reclaiming the land of a coal gangue storage yard and the like. The economic efficiency increased by one ton of coal is comprehensively measured, namely the cost for increasing an automatic gangue filling equipment system (the lifting cost for not taking out the coal gangue from a well, the reclamation cost for a coal gangue storage yard and the comprehensive treatment cost for ground subsidence) is 1.2-4 yuan per ton of coal (related to factors such as gangue content in the coal seam, thickness of the coal seam, depth of buried coal seam and the like), in other words, for a coal mine enterprise producing 400 million tons of coal annually, the profit of 480-1600 million yuan can be additionally increased every year, and the economic benefit is remarkable.
(3) The method has the advantages of reducing environmental pollution, synchronously filling the goaf with the coal gangue, reducing series coal mine geological environment problems such as aquifer collapse of the goaf, ground collapse geological disasters, occupation of land by the gangue and the like, having multiple benefits, and being a linkage device and a technical method for green mining.
Drawings
FIG. 1 is a schematic diagram of a fully mechanized coal mining coal gangue synchronous filling system based on coal mining collapse degree reduction provided by an embodiment of the invention (● in the diagram belongs to a connection point between different devices);
in the figure: 1. point I; 2. a point of attachment No. II; 3. a point of attachment number III; 4. connection point number IV; 5. a self-moving fully-mechanized mining hydraulic support; 6. a coal conveying automatic conveying conveyor belt; 7. a dry-method skip platform gangue sorter; 8. a coal gangue automatic conveying conveyor belt; 9. a scalable linkage scraper conveyer.
Fig. 2 is a flow chart of a fully-mechanized coal gangue synchronous filling method based on reduction of coal mining collapse degree provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
After underground coal resources are mined, a certain goaf is formed, because most roof surrounding rocks above a coal seam are mud rocks and sandstone rocks, the pressure resistance of the rocks is very small, the general working face length of the fully-mechanized coal mining is 200m, the working face advancing length can reach 2000m, and the height of a coal seam space formed by mining can reach 3-8m, so that the underground space formed by mining cannot support the pressure of the rocks with the thickness of tens of meters to more than 200 meters, the overlying rocks fall off and sink, and the goaf and ground cracks are shown on the ground surface to collapse, thereby causing the quality of cultivated land cracking and sinking, the road sinking unevenness does not endanger the driving safety, the house cracks collapse and the like; meanwhile, due to mining subsidence, a water-containing layer or the ground surface above a water-flowing fractured zone communication coal seam is formed on a goaf, so that underground water or surface water leaks into a mining roadway, river cut-off, lake atrophy, well water and spring water are dried, people and livestock are difficult to drink water, vegetation depending on surface water and shallow underground water is dried in northwest arid areas, and the safety of the ecological environment is endangered; meanwhile, if the coal gangue does not fill a goaf, the coal gangue must be lifted to the ground surface for accumulation, and environmental problems such as land occupation of the coal gangue, atmospheric environment pollution caused by spontaneous combustion, water and soil environment pollution caused by precipitation and leaching of harmful substances and the like are caused. Therefore, the coal gangue filling goaf has multiple problems of reducing and lightening ground collapse and coal gangue accumulation.
The comprehensive mechanized coal mining process, called fully mechanized coal mining for short, is a mechanized coal mining technical method with five main production processes of coal mining, coal loading, coal conveying, supporting and goaf treatment, reduces labor intensity, improves the single-output and safety of a working face, and has the advantages of high yield, high efficiency, safety, good labor conditions, low labor intensity and the like. The fully mechanized coal mining comprises a double-drum coal mining machine, a flexible scraper conveyor, a hydraulic support, a rubber belt conveyor and the like. Fully mechanized mining is the most main technical process of coal mining in China at present, and the top plate management adopts a full caving method to manage the top plate, namely after coal mining, the top plate of a goaf is inevitably caved, and multiple coal mine geological environment problems such as caving collapse of overlying rocks of the goaf, water-bearing stratum damage and the like are inevitably caused. At present, ecological civilization construction needs the Jinshan Yinshan and the Lushui Qingshan, so that the problems of coal mine goaf collapse reduction and coal gangue land occupation pollution environment pollution reduction are important problems which need to be solved in mines.
The invention is further described below with reference to specific assays.
The gangue filling equipment of the invention forms integrated coordination linkage with the self-moving fully-mechanized mining hydraulic support and the retractable coordination linkage gangue scraper conveyor, and runs synchronously; the coal gangue enters an automatic coal gangue conveying belt through a dry-method skip gangue separator according to the specific gravity difference between the coal and the coal gangue; the coal gangue is pushed to be flat through the gangue scraper plate which is in telescopic coordinated linkage behind the self-moving fully-mechanized mining hydraulic support, and the green mining technology process for mining coal and filling a goaf while filling the coal gangue is formed.
As shown in fig. 1, the fully mechanized coal gangue synchronous filling system based on coal mining collapse reduction provided by the embodiment of the present invention includes:
the device comprises a connection point I1, a connection point II 2, a connection point III 3, a connection point IV 4, a self-moving fully-mechanized mining hydraulic support 5, a coal conveying automatic conveying conveyor belt 6, a dry method skip platform gangue sorter 7, a gangue automatic conveying conveyor belt 8 and a scalable coordinated linkage gangue scraper conveyor 9.
The fully-mechanized coal gangue synchronous filling system is provided with an automatic moving fully-mechanized coal mining hydraulic support 5, the automatic moving fully-mechanized coal mining hydraulic support 5 is connected with a dry skip gangue separator 7 through a No. II connecting point 2, the dry skip gangue separator 7 is connected with a coal conveying automatic conveying conveyor belt 6 through a No. III connecting point 3, the dry skip gangue separator 7 is connected with a coal gangue automatic conveying conveyor belt 8 through a No. IV connecting point 4, and a telescopic coordinated linked gangue scraper conveyor 9 is connected with the automatic moving fully-mechanized coal mining hydraulic support 5 through a No. I connecting point 1.
The fully-mechanized coal gangue synchronous filling system based on coal mining collapse reduction provided by the embodiment of the invention is organically integrated with a self-moving fully-mechanized coal mining hydraulic support and synchronously operates. A dry method skip platform gangue sorter is added at the side of the self-moving fully-mechanized mining hydraulic support, and the gangue enters an automatic gangue conveying conveyor belt; the conveying belt equipment for transporting the coal gangue is simultaneously coordinated and linked with a scalable and coordinated gangue scraper conveyor (coal conveying); the coal gangue is automatically conveyed to a temporary goaf behind the self-moving fully-mechanized mining hydraulic support through an automatic coal gangue conveying conveyor belt; pushing the coal gangue flat through a retractable and coordinative linked gangue scraper at the rear side of the self-moving fully-mechanized mining hydraulic support so as to fill more coal gangue into a goaf; with the forward advance of the fully mechanized mining face, the coal gangue is sequentially accumulated in a goaf behind the self-moving fully mechanized mining hydraulic support, and a technical method for mining coal, transporting coal, synchronously filling the goaf with the coal gangue and preventing the coal gangue from leaving a well is formed.
As shown in fig. 2, the fully mechanized coal gangue synchronous filling method based on coal mining collapse reduction provided by the embodiment of the invention comprises the following steps:
s201: in the coal mining process of the fully mechanized coal mining machine, gangue (generally called coal gangue) is clamped from a top plate rock stratum and a bottom plate rock stratum of a coal seam, the coal gangue is separated from coal through a dry method skip gangue sorting machine through the specific gravity difference of the coal and the coal gangue, and the coal gangue enters an automatic coal gangue conveying conveyor belt;
s202: the coal gangue is automatically conveyed to a goaf formed behind the self-moving fully-mechanized mining hydraulic support through a conveyor belt, moves along with the movement of the self-moving fully-mechanized mining hydraulic support in the coal mining process, and the coal gangue is sequentially accumulated in the goaf;
s203: pushing the coal gangue flat through a telescopic and coordinated gangue scraper plate behind the self-moving fully-mechanized mining hydraulic support, and filling the coal gangue possibly more;
s204: with the forward advance of the fully mechanized mining face, the coal gangue is sequentially accumulated in the goaf behind the self-moving fully mechanized mining hydraulic support, and the method for synchronously filling the goaf while mining coal, transporting coal and coal gangue is formed.
According to the invention, coal and coal gangue are separated through the specific gravity difference of the coal and the coal gangue and a dry-method skip sorting machine sorting technology, and the coal gangue enters an automatic gangue conveying conveyor belt; the coal gangue is filled into a goaf which is formed by fully mechanized mining behind a hydraulic support and is not yet caving by a linkage scraper at the rear side of a self-moving fully mechanized mining hydraulic support of a long-wall coal mining method (subsequent built fully mechanized mining), and the coal gangue is synchronously filled into the goaf of the self-moving fully mechanized mining hydraulic support while coal mining is carried out. The invention reduces the lifting cost of the underground coal mining gangue during the well discharge; coal gangue ground accumulation land acquisition cost; the long-term stacked coal gangue self-ignites and pollutes the fire extinguishing expense of the atmospheric environment; coal gangue yard land reclamation and the like; meanwhile, a large-area goaf formed by underground coal mining is reduced, the caving amount of overlying rocks in the goaf is reduced, the damage degree of underground coal mining surface subsidence is directly or indirectly reduced, and the sustainable development target of green development of coal resource development and mine ecological environment protection is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. A fully-mechanized coal gangue synchronous filling method based on coal mining collapse degree reduction is characterized by comprising the following steps:
in the comprehensive mechanized coal mining process, through the specific gravity difference of coal and coal gangue, coal and coal gangue are separated by a dry jigging separator while mining coal, and the coal gangue enters an automatic coal gangue conveying belt; filling coal gangue into a goaf formed by fully mechanized mining at the back of the self-moving fully mechanized mining hydraulic press bracket when a coal mining overburden rock layer does not fall off through a gangue scraper conveyor at the back of the self-moving fully mechanized mining hydraulic press bracket so as to reduce the fall off amount of the coal mining overburden rock at the goaf and realize the method for synchronously filling the generated coal gangue into the goaf behind the self-moving fully mechanized mining hydraulic press bracket while mining;
the fully-mechanized coal gangue synchronous filling method based on reduction of coal mining collapse degree specifically comprises the following steps:
the coal gangue mined from a coal seam top plate, a bottom plate and a coal seam interlayer in the coal mining process of a fully mechanized coal mining machine is automatically sorted by a dry jigging sorting machine through the specific gravity difference of coal and the coal gangue, the coal gangue is separated from the coal, the coal enters a coal conveying automatic conveying belt, and the coal gangue enters the coal gangue automatic conveying belt;
step two, the coal gangue is automatically conveyed into a goaf behind the self-moving fully-mechanized mining hydraulic press support through an automatic coal gangue conveying conveyor belt, and the coal gangue moves in a coordinated linkage manner along with the self-moving fully-mechanized mining hydraulic press support and is sequentially accumulated in the goaf;
pushing the coal gangue to be flat through a scalable and coordinative linked gangue scraper conveyor behind a self-moving fully-mechanized mining hydraulic press support, filling more coal gangue into a goaf, ensuring that overlying strata subsidence is as uniform as possible, and reducing damage to surface land and structures thereof;
step four, coal gangue is sequentially accumulated in a goaf behind the self-moving fully-mechanized hydraulic mining machine support along with forward advancing coal mining of the fully-mechanized working face, coal mining and coal transportation are carried out forward by the self-moving fully-mechanized hydraulic mining machine support, and the coal gangue is synchronously and reversely filled in the goaf behind the self-moving fully-mechanized hydraulic mining machine support;
the fully-mechanized coal gangue synchronous filling method based on coal mining collapse degree reduction is implemented by a fully-mechanized coal gangue synchronous filling system based on coal mining collapse degree reduction, and the system is provided with:
a self-moving fully-mechanized mining hydraulic machine bracket;
the self-moving fully-mechanized mining hydraulic machine support is connected with the dry jigging separator through a No. II connecting point;
the dry jigging separator is connected with the coal-conveying automatic conveying conveyor belt through a No. III connecting point;
the dry jigging separator is connected with an automatic coal gangue conveying conveyor belt through a No. IV connecting point;
the scalable and coordinated gangue scraper conveyor is connected with the self-moving fully-mechanized mining hydraulic machine support through a No. I connecting point; the No. II connecting point, the No. III connecting point and the No. IV connecting point are positioned on the same side of the self-moving fully-mechanized mining hydraulic machine support; and the coal gangue automatic conveying conveyor belt conveys the coal gangue in the opposite direction to the coal conveying automatic conveying conveyor belt and then piles up at the rear side of the self-moving fully-mechanized mining hydraulic machine support.
2. A coal resource underground mining device for reducing the occupied area and the environment pollution of coal gangue, which carries a fully mechanized coal gangue synchronous filling system for reducing the coal mining collapse degree, comprises a self-moving fully mechanized coal mining hydraulic machine support;
the self-moving type fully-mechanized mining hydraulic machine support is connected with the dry-method jigging separator through a No. II connecting point;
the dry jigging separator is connected with the coal transportation automatic conveying belt through a No. III connecting point;
the dry jigging separator is connected with an automatic coal gangue conveying belt through an IV connecting point;
the scalable and coordinated gangue scraper conveyor is connected with the self-moving fully-mechanized mining hydraulic machine support through a No. I connecting point; the No. II connecting point, the No. III connecting point and the No. IV connecting point are positioned on the same side of the self-moving fully-mechanized mining hydraulic machine support; and the coal gangue automatic conveying conveyor belt conveys the coal gangue to the coal conveying automatic conveying conveyor belt in the opposite direction, and then the coal gangue is stacked on the rear side of the self-moving fully-mechanized mining hydraulic machine support.
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| SU578476A1 (en) * | 1975-02-24 | 1977-10-30 | Днепропетровский Ордена Трудового Красного Знамени Горный Институт Им. Артема | Filling-up machine |
| SU608972A1 (en) * | 1977-01-06 | 1978-05-30 | Всесоюзный Научно-Исследовательский И Проектно-Конструкторский Угольный Институт | Filling pipeline with outlets |
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