Post-face filling support for filling and exploiting non-isolation coal pillar

Abstract

The utility model provides a back filling support for filling and mining a non-isolation coal pillar, and belongs to the technical field of coal mining. According to the technical scheme, the device comprises a base, a plurality of first telescopic rods are vertically arranged on the base, a main supporting plate is arranged at the top ends of the first telescopic rods, an auxiliary supporting plate is hinged to one side of the main supporting plate, a second telescopic rod is arranged between the auxiliary supporting plate and the base, and one end of the second telescopic rod is rotationally arranged on the base; the other end of the second telescopic rod is rotationally arranged on the auxiliary supporting plate, and the upper surface of the auxiliary supporting plate is flush with the upper surface of the main supporting plate after the auxiliary supporting plate is supported by the second telescopic rod to be flattened. The utility model has the beneficial effect that the stability of the working space is greatly enhanced. When coal mining and filling operation is carried out, the face back filling support can powerfully support the top plate, collapse and deformation of the top plate are effectively prevented, a safe and reliable working environment is created for workers, and the risk of accidents is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a non-isolated coal pillar filling and mining surface back-filling support. Background Art

[0002] In the process of coal mining, coal mining and filling is a crucial link. With the continuous exploitation of coal resources, the requirements for mining technology are also increasing. In coal mining and filling operations, ensuring the safety and stability of the working space is the primary task. Traditional coal mining methods often lead to the emergence of goafs, which may not only cause safety hazards such as roof collapse, but also have a certain impact on the geological environment. In order to solve these problems, coal mining and filling technology has gradually developed. In this process, the support role of the support is particularly critical. During coal mining and filling, the working face needs to withstand huge pressure from the roof and surrounding rock formations. Without reliable support, serious consequences such as roof sinking and tunnel deformation may occur, threatening the life safety of workers and the smooth progress of mining work. For this reason, this article provides a non-isolated coal pillar filling and mining face backfilling support, which can effectively resist these pressures through its strong support force and stable structure, providing a safe and reliable working environment for coal mining and filling. Utility Model Content

[0003] The utility model aims to provide a post-filling support for filling and mining without isolation coal pillars, which has small filling amount, strong structural stability and good filling effect.

[0004] The utility model is achieved through the following measures:

[0005] A post-filling support for filling and mining without isolation coal pillars is characterized in that it includes a base, and the base of the post-filling support has the same structure as the base of the hydraulic support, and a plurality of groups of telescopic rods 1 are vertically arranged on the base, and a main support plate is arranged on the top of the plurality of telescopic rods 1, and a secondary support plate is hinged on one side of the main support plate, and a telescopic rod 2 is arranged between the secondary support plate and the base, one end of the telescopic rod 2 is rotatably arranged on the base, and the other end of the telescopic rod 2 is rotatably arranged on the secondary support plate, and the upper surface of the secondary support plate is flush with the upper surface of the main support plate after being stretched and flattened by the support of the telescopic rod 2, and the safe working area can be increased after the secondary support plate is stretched and flattened.

[0006] The rear-surface filling bracket also includes main side panels arranged on both sides for use with the stack-type filling bags, and several groups of telescopic rods three are arranged on the opposite inner sides of the main side panels on both sides, and several corresponding mounting plates are arranged on the base, and the other ends of several groups of telescopic rods three away from the main side panels are arranged on the corresponding mounting plates. When in use, a flat plate can be arranged behind the hydraulic support, so that the main side panels of the two rear-surface filling brackets, the rear wall surface of the working surface cut-out and the flat plate form an initial filling area, and this filling area is a rectangular body. After the stack-type filling bags installed inside are filled with paste slurry, the shape of this filling area is conducive to the solidification and molding of the paste slurry. As the working surface advances, during subsequent filling, the wall surface of the stack-type filling bag where the internal paste slurry is solidified in the front forms a new filling area with the main side panels and the flat plate on both sides.

[0007] The base is provided with a mounting rod, and the mounting rod includes a rod 1, the lower end of the rod 1 is rotatably arranged on the base, the upper end of the rod 1 is rotatably arranged on the rod 2, and the upper end of the rod 2 is rotatably arranged on the lower side surface of the main support plate, and the auxiliary side plates are provided on both sides of the rod 2 through a plurality of groups of telescopic rods 4, one end of the telescopic rod 4 is arranged on the rod 2, and the other end of the telescopic rod 4 is arranged on the auxiliary side plate. When the main support plate rises and abuts against the top plate above the comprehensive mining working face, the auxiliary side plate will rise accordingly. To avoid operation interference, before the main support plate rises, the main side plate and the auxiliary side plate will both move a certain distance outwardly through the telescopic rod 3 and the telescopic rod 4. Then, the main support plate rises under the action of the telescopic rod 1, and after abutting against the top plate, the corresponding main side plate and the auxiliary side plate are pulled back by the telescopic rod 3 and the telescopic rod 4, so that the two sides of the rear filling bracket are flat, which is convenient for supporting the installation of the stacking filling bag.

[0008] The telescopic rod 1, the telescopic rod 2, the telescopic rod 3 and the telescopic rod 4 are all hydraulic telescopic rods.

[0009] The backfill support can be applied to the non-isolated coal pillar backfill mining process, as follows:

[0010] 1. Arrange the track chute, belt chute and working face cut-out according to the layout of the conventional fully mechanized mining and filling working face;

[0011] 2. Install fully mechanized mining and filling working face equipment;

[0012] 3. Based on the equipment configuration of conventional fully mechanized mining and filling working face, this process arranges a back-filling support with a secondary support plate and side plates behind every three hydraulic supports. The back-filling support is 1.5m wide, with a top beam of 3m, and the front beam and tail beam are both 1.5m long.

[0013] 4. After the fully-mechanized mining and filling working face equipment is installed, start cutting coal and pulling the frame;

[0014] 5. As the fully mechanized mining and filling working face advances, when the space behind the face is sufficient to adjust the filling support behind the face, the auxiliary support plates on the filling support behind the face are rotated 90 degrees one by one, that is, the auxiliary support plates are flush with the main support plates;

[0015] 6. After the back-filling support is adjusted, a stacking filling bag is installed under the protection of the back-filling support (the filling port of the stacking filling bag is designed with a self-locking structure to ensure the filling and top connection effect. Usually, the specifications of the stacking filling bag are length × width × height: 3m × 3m × (1.5-3)m). If more filling agent is added to achieve rapid setting of the filling slurry, the stacking filling bag may not be used;

[0016] 7. After the filling interfaces of all the stack-type filling bags on the working surface are connected to the filling pipelines, fill the paste filling slurry into the stack-type filling bags in sequence. The paste filling slurry in the stack-type filling bags must be dense and in close contact with the top plate;

[0017] 8. Stop filling after all the stacked filling bags on the working surface are filled and fully connected to the top;

[0018] 9. Continue to cut coal and pull the frame;

[0019] 10. Repeat steps 7 to 10 until the entire working face is mined. It should be noted that the working face adjacent to the current strip filling working face only needs to excavate one tunnel and cut an eye to connect with the tunnel reserved for this face (one less tunnel needs to be excavated when arranging the working face).

[0020] The mining height of the fully mechanized mining and filling working face is 2.7m, the inclined face length is 150m, and the strike length is 1000m. A mining and filling cycle is completed in 48 hours. The cycle operation time is: coal cutting → hanging net → moving frame → pushing conveyor time is 20 hours, the filling area isolation time is 8 hours, the filling time is 12 hours, and the solidification maintenance time is 8 hours.

[0021] The beneficial effects of the utility model are as follows: in the process of coal mining and filling, the use of the back-filling support for support has shown many significant beneficial effects. First, it greatly enhances the stability of the working space. When coal mining and filling operations are carried out, the back-filling support can effectively support the roof, effectively preventing the collapse and deformation of the roof, creating a safe and reliable working environment for the staff, and greatly reducing the risk of accidents. Secondly, the use of the back-filling support ensures the continuity and efficiency of the coal mining and filling work. It can adapt to different coal mining progress and filling rhythms, flexibly adjust the support status, so that the entire operation process can proceed smoothly, reduce shutdowns and delays caused by support problems, and thus improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the installation of the stacked filling bags according to an embodiment of the utility model.

[0023] Figure 2 It is a schematic diagram of the rear filling bracket structure in an embodiment of the utility model.

[0024] Figure 3 This is a schematic diagram of the internal structure of the rear filling bracket in an embodiment of the utility model.

[0025] Among them, the accompanying drawings are marked as: 1. stacked filling bag; 2. rear filling bracket; 3. filling pipeline; 4. hydraulic bracket; 5. auxiliary support plate; 6. main support plate; 7. auxiliary side plate; 8. telescopic rod one; 9. telescopic rod three; 10. telescopic rod two; 11. base; 12. rod one; 13. rod two; 14. main side plate. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0029] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0030] Example 1

[0031] See also Figure 1-3 A post-filling support for non-isolated coal pillar filling and mining includes a base 11. The base 11 of the post-filling support 2 has the same structure as the base 11 of the hydraulic support 4. A plurality of groups of telescopic rods 8 are vertically arranged on the base 11. A main support plate 6 is arranged at the top of the plurality of telescopic rods 8. A secondary support plate 5 is hinged on one side of the main support plate 6. A telescopic rod 2 10 is arranged between the secondary support plate 5 and the base 11. One end of the telescopic rod 2 10 is rotatably arranged on the base 11, and the other end of the telescopic rod 2 10 is rotatably arranged on the secondary support plate 5. The upper surface of the secondary support plate 5 is flush with the upper surface of the main support plate 6 after being flattened by the support of the telescopic rod 2 10. After the secondary support plate 5 is flattened, the safe working area can be increased.

[0032] The rear filling bracket 2 also includes main side panels 14 arranged on both sides for use with the stack-type filling bags 1. Several groups of telescopic rods 3 9 are arranged on the inner side surfaces opposite to each other of the main side panels 14 on both sides, and several corresponding mounting plates are arranged on the base 11. The other ends of the several groups of telescopic rods 3 9 away from the main side panels 14 are arranged on the corresponding mounting plates. When in use, a flat plate can be arranged behind the hydraulic bracket 4, so that the main side panels 14 of the two rear filling brackets 2, the rear wall surface of the working surface cut-out and the flat plate form an initial filling area. This filling area is a rectangular body. After the stack-type filling bag 1 installed inside is filled with paste slurry, the shape of this filling area is conducive to the solidification and molding of the paste slurry. As the working surface advances, during subsequent filling, the wall surface of the stack-type filling bag 1 where the paste slurry inside is solidified, and the main side panels 14 on both sides and the flat plate form a new filling area.

[0033] The base 11 is provided with a mounting rod, which includes a rod 12. The lower end of the rod 12 is rotatably arranged on the base 11, and the upper end of the rod 12 is rotatably arranged with a rod 2 13. The upper end of the rod 2 13 is rotatably arranged on the lower side surface of the main support plate 6. Auxiliary side plates 7 are arranged on both sides of the rod 2 13 through a plurality of groups of telescopic rods 4. One end of the telescopic rod 4 is arranged on the rod 2 13, and the other end of the telescopic rod 4 is arranged on the auxiliary side plates 7. When the main support plate 6 rises and abuts against the top plate above the comprehensive mining working face, the auxiliary side plates 7 will rise accordingly. To avoid interference in operation, before the main support plate 6 rises, the main side plates 14 and the auxiliary side plates 7 will be moved outward by the telescopic rods 3 9 and the telescopic rods 4. After that, the main support plate 6 rises under the action of the telescopic rod 1 8. After abutting against the top plate, the corresponding main side plates 14 and the auxiliary side plates 7 are pulled back by the telescopic rods 3 9 and the telescopic rods 4, so that the two sides of the rear filling bracket 2 are flat, which is convenient for supporting the installation of the stacking filling bag 1.

[0034] Telescopic rod 1 8, telescopic rod 2 10, telescopic rod 3 9 and telescopic rod 4 are all hydraulic telescopic rods.

[0035] Example 2

[0036] The backfill support 2 provided in Example 1 can be applied to the backfill mining process without isolation coal pillars, as follows:

[0037] 1. Arrange the track chute, belt chute and working face cut-out according to the layout of the conventional fully mechanized mining and filling working face;

[0038] 2. Install fully mechanized mining and filling working face equipment;

[0039] 3. Based on the equipment configuration of the conventional fully mechanized mining and filling working face, this process arranges a back-filling support 2 with a secondary support plate 5 and a side plate behind every three hydraulic supports 4. The back-filling support 2 is 1.5m wide, with a top beam of 3m, and the front beam and tail beam are both 1.5m long;

[0040] 4. After the fully-mechanized mining and filling working face equipment is installed, start cutting coal and pulling the frame;

[0041] 5. As the fully mechanized mining and filling working face advances, when the space behind the face is sufficient to adjust the back-face filling support 2, the auxiliary support plates 5 on the back-face filling support 2 are rotated 90 degrees one by one, that is, the auxiliary support plates 5 are flush with the main support plates 6;

[0042] 6. After the back-filling bracket 2 is adjusted, the stacking filling bag 1 is installed under the protection of the back-filling bracket 2 (the filling port of the stacking filling bag 1 is designed with a self-locking structure to ensure the filling and top connection effect. Usually, the specifications of the stacking filling bag 1 are length × width × height: 3m × 3m × (1.5 ~ 3) m). If the method of adding more filling agent is adopted to realize the rapid setting of the filling slurry, the stacking filling bag 1 can also be omitted;

[0043] 7. After the filling interfaces of all the stack-type filling bags 1 on the working surface are connected to the filling pipelines 3, the paste filling slurry is filled into the stack-type filling bags 1 in sequence. The paste filling slurry in the stack-type filling bags 1 must be dense and in close contact with the top plate;

[0044] 8. After all the stacked filling bags 1 on the working surface are filled and fully connected to the top, stop filling;

[0045] 9. Continue to cut coal and pull the frame;

[0046] 10. Repeat steps 7 to 10 until the entire working face is mined. It should be noted that the working face adjacent to the current strip filling working face only needs to excavate one tunnel and cut an eye to connect with the tunnel reserved for this face (one less tunnel needs to be excavated when arranging the working face).

[0047] The mining height of the fully mechanized mining and filling working face is 2.7m, the inclined face length is 150m, and the strike length is 1000m. A mining and filling cycle is completed in 48 hours. The cycle operation time is: coal cutting → hanging net → moving frame → pushing conveyor time is 20 hours, the filling area isolation time is 8 hours, the filling time is 12 hours, and the solidification maintenance time is 8 hours.

[0048] When the wall-type strip filling non-pillar mining technology is used for filling mining, the operation time of the mining and filling cycle is 33 hours:

[0049] 1. The filling volume is 58% of the total filling volume of the goaf, and the filling volume is reduced by 42%;

[0050] 2. Cycle operation time: The time for coal cutting → hanging nets → moving racks → pushing conveyors is 20 hours, the isolation time for the filling area is 4 hours, if more filling agents are added, no isolation is required (isolation time is 0), the filling maintenance time is 7 hours, the solidification maintenance time is 2 hours, and the mining and filling cycle operation time is 33 hours or 29 hours;

[0051] 3. If a mining area is arranged with 6 working faces, the construction of 5 mining tunnels can be reduced, with an average length of 1,000 meters. Based on the excavation cost of 3,000 yuan per meter of tunnel, the excavation cost can be saved by 15 million yuan; on average, each filling face can save 2.5 million yuan in excavation costs;

[0052] 4. Leave 5 less coal pillars. The width of the coal pillar is usually 5m, the coal thickness is 2.7m, and the average length of the working face is 1,000m. This will produce 86,568 tons of coal (86,000 tons of coal resources will be wasted less). The price of each ton of coal is 800 yuan, and the income is 69.25 million yuan more. On average, each face will earn 11.54 million yuan more.

[0053] 5. Due to the improvement of backfill mining efficiency (from 180 mining and backfilling cycles per year to 261 mining and backfilling cycles per year), the annual coal output increased by 120,000 tons, the selling price of each ton of coal was 800 yuan, and the annual revenue increased by 96 million yuan;

[0054] 6. Compared with the full filling method, annual revenue increases by 84.49 million yuan.

[0055] Technical features not described in the present invention can be achieved through or by adopting existing technologies, and will not be elaborated here. Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should also fall within the scope of protection of the present invention.

Claims

1. A non-isolated coal pillar filling and mining post-filling support, characterized in that: The invention comprises a base (11), on which a plurality of groups of telescopic rods (8) are vertically arranged, a main support plate (6) is arranged at the top of the plurality of telescopic rods (8), a secondary support plate (5) is hingedly connected to one side of the main support plate (6), a telescopic rod (10) is arranged between the secondary support plate (5) and the base (11), one end of the telescopic rod (10) is rotatably arranged on the base (11), and the other end of the telescopic rod (10) is rotatably arranged on the secondary support plate (5), and the upper surface of the secondary support plate (5) is flush with the upper surface of the main support plate (6) after being stretched and flattened by the support of the telescopic rod (10); The back-filling support also includes main side panels (14) arranged on both sides for use with the stack-type filling bags (1), and a plurality of groups of telescopic rods (9) are arranged on the inner side surfaces opposite to each other of the main side panels (14) on both sides, and a plurality of corresponding mounting plates are arranged on the base (11), and the other ends of the plurality of groups of telescopic rods (9) away from the main side panels (14) are arranged on the corresponding mounting plates.

2. The non-isolated coal pillar filling and mining support after surface filling according to claim 1 is characterized in that: The base (11) is provided with a mounting rod, the mounting rod comprising a rod 1 (12), the lower end of the rod 1 (12) being rotatably arranged on the base (11), the upper end of the rod 1 (12) being rotatably arranged with a rod 2 (13), the upper end of the rod 2 (13) being rotatably arranged on the lower side surface of the main support plate (6), and auxiliary side plates (7) being arranged on both sides of the rod 2 (13) through a plurality of groups of telescopic rods 4, one end of the telescopic rod 4 being arranged on the rod 2 (13), and the other end of the telescopic rod 4 being arranged on the auxiliary side plate (7).

3. The post-filling support for filling and mining without isolation coal pillars according to claim 2 is characterized in that: The telescopic rod one (8), the telescopic rod two (10), the telescopic rod three (9) and the telescopic rod four are all hydraulic telescopic rods.

Images