Gob-side entry retaining filling bag and gob-side entry retaining supporting structure

Abstract

The utility model provides a gob-side entry retaining filling bag and a gob-side entry retaining supporting structure, and the gob-side entry retaining filling bag comprises a flexible bag body which comprises a top surface, a bottom surface and four side surfaces; the four side faces comprise the first connecting face and the second connecting face, and the first connecting face and the second connecting face are arranged at intervals in the length direction of the flexible bag body. In every two adjacent gob-side entry retaining filling bags, the first connecting face of one gob-side entry retaining filling bag corresponds to the second connecting face of the other gob-side entry retaining filling bag. A plurality of grooves are formed in the top face and used for being matched with a plurality of pi-shaped steel beams installed on a top plate of the gob-side entry retaining in a one-to-one corresponding inserted connection mode. The first connecting face and the second connecting face are each provided with a plurality of connector mounting holes used for allowing one end of the I-shaped steel to penetrate through, so that the problems that in the prior art, a gap is reserved between the upper portion of the flexible film bag and the top plate, and the flexible film walls are prone to dislocation, inclination and even collapse along with increasing of the mining difficulty are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of gob-side entry retaining support, and particularly relates to a gob-side entry retaining filling bag and a gob-side entry retaining support structure. Background Technique

[0002] Gob-side entry retaining refers to a roadway formed along the boundary of a coal seam during coal mining. This roadway serves as a passage and ventilation route during coal mining and also facilitates subsequent mining operations.

[0003] During coal mining, the underground rock formation structure may change due to coal mining, resulting in roadway deformation or collapse. In-gob support can support the surrounding rock and soil of the roadway to ensure the stability of the roadway. In gob-side entry retaining, the in-gob support adopts the method of pumping concrete walls with flexible formwork bags (i.e., injecting concrete into the cavities on both sides of the roadway through the use of flexible formwork bags to form concrete walls to support the lateral pressure of the roadway, thereby ensuring the stability and safety of the roadway). The walls are connected to each other by laying steel bar ladder beams and steel bar meshes on the surface of the flexible formwork bags and cooperating with tension bolts to form a stable structure, so as to improve the overall stability and bearing capacity of the roadway.

[0004] However, this support method has certain defects:

[0005] (1) Since the roadway roof above the flexible formwork bag is supported by channel steel beams and the upper part of the flexible formwork bag is a flat flexible formwork, after the concrete is pumped and filled, the flexible formwork bag cannot contact the roof, and the sealing is not tight, resulting in a certain gap between the flexible formwork bag and the roof. This cannot make the wall bear pressure tightly and also causes air flow to enter the gob, accelerating the oxidation and spontaneous combustion of the remaining coal in the gob. Therefore, to ensure that the gap is airtight and the wall touches the roof tightly and can withstand the roof pressure, after the wall is filled, it is necessary to manually fill and seal the gap above the wall again, which is very time-consuming and laborious.

[0006] (2) As the mining depth gradually increases, the collapsed rock mass in the gob may generate a lateral pressure perpendicular to the wall plane on the surrounding rock mass or structure. This lateral pressure will be transmitted to the flexible formwork wall, forming a lateral thrust. After being affected by the lateral thrust, the flexible formwork wall will deform, cracks will occur at the joints of the flexible formwork wall, and even the flexible formwork wall may tilt or collapse, seriously affecting the overall stability of the flexible formwork wall.

[0007] (3) When the lateral thrust exerted by the caving rock mass in the goaf above the flexible mold bag on the wall is relatively severe, the connection between the flexible mold bag walls relying on the steel bar ladder beams and steel wire meshes cannot effectively play a longitudinal interlocking role, resulting in the easy dislocation of individual walls and the leakage of air through the gaps between the walls, providing the required oxygen as an oxidant for the oxidation and spontaneous combustion of coal, accelerating the oxidation reaction of coal, and thus accelerating the oxidation and spontaneous combustion of the floating coal in the goaf.

[0008] (4) When it comes to a fully mechanized mining face with a large inclination angle, after the flexible mold wall is affected by the lateral thrust of the caving rock mass from the roof, it is prone to cause the wall to tilt and move to one side. In severe cases, the wall may collapse. Utility Model Content

[0009] The main purpose of the present utility model is to provide a gob-side entry retaining filling bag and a gob-side entry retaining support structure to solve the problems in the prior art that there is a gap between the upper part of the flexible film bag and the roof, and as the mining difficulty increases, the flexible film walls are prone to dislocation, inclination, and even collapse.

[0010] To achieve the above object, according to one aspect of the present utility model, a gob-side entry retaining filling bag is provided, including: a flexible bag body, the flexible bag body includes a top surface, a bottom surface, and four side surfaces located between the top surface and the bottom surface and connected in sequence to jointly enclose a filling cavity, and exhaust holes and grouting holes communicating with the filling cavity are arranged at intervals on the flexible bag body; the four side surfaces include a first connection surface and a second connection surface, and the first connection surface and the second connection surface are arranged at intervals along the length direction of the flexible bag body; in adjacent two gob-side entry retaining filling bags, the first connection surface of one gob-side entry retaining filling bag corresponds to the second connection surface of the other gob-side entry retaining filling bag; wherein, a plurality of grooves are arranged on the top surface, and the plurality of grooves are used for plugging and matching with a plurality of π-shaped steel beams installed on the roof of the gob-side entry one by one; a plurality of joint installation holes are arranged on both the first connection surface and the second connection surface, and each joint installation hole is used for one end of an I-beam to pass through.

[0011] Furthermore, the gob-side entry retaining filling bag includes two sleeving components, the two sleeving components respectively correspond to the first connection surface and the second connection surface, and each sleeving component includes a plurality of sleeves, and the plurality of sleeves are installed at the corresponding plurality of joint installation holes one by one; wherein, one end of each sleeve is connected to the corresponding joint installation hole, and the other end of each sleeve extends into the corresponding filling cavity, and the sleeve is used for sleeving outside the corresponding I-beam.

[0012] Furthermore, the gob-side entry retaining filling bag includes two lifting components, which are arranged at intervals along the width direction of the flexible bag body and are respectively located on the opposite sides of the flexible bag body. Each lifting component includes a plurality of lifting rings arranged at intervals along the length direction of the flexible bag body; wherein, the lower side of each lifting ring is connected to the flexible bag body, the upper side of each lifting ring is higher than the top surface, and each lifting ring is used for being tied to the roof steel mesh installed on the roof.

[0013] Furthermore, the gob-side entry retaining filling bag includes two bearing pipes, which are arranged at intervals along the width direction of the flexible bag body and are respectively located on the opposite sides of the flexible bag body. Each bearing pipe extends along the length direction of the flexible bag body, and the top of each bearing pipe is flush with the bottom surface of the groove, so as to support the flexible bag body of the gob-side entry retaining filling bag to be filled by supporting the two bearing pipes.

[0014] Furthermore, the gob-side entry retaining filling bag includes: two first joint components, which are arranged at intervals along the width direction of the flexible bag body and are respectively located on the opposite sides of the first connection surface. Each first joint component includes a plurality of first bag joints arranged at intervals along the height direction of the flexible bag body; two second joint components, which are arranged at intervals along the width direction of the flexible bag body and are respectively located on the opposite sides of the second connection surface. Each second joint component includes a plurality of second bag joints arranged at intervals along the height direction of the flexible bag body; the two first joint components and the two second joint components are arranged in one-to-one correspondence, and the plurality of first bag joints of each first joint component and the plurality of second bag joints of the corresponding second joint component are arranged in one-to-one correspondence; wherein, in two adjacent gob-side entry retaining filling bags, each first bag joint of one gob-side entry retaining filling bag is used for being connected to each second bag joint of the other gob-side entry retaining filling bag in one-to-one correspondence.

[0015] Furthermore, the four side surfaces include a first side surface and a second side surface, and the first side surface and the second side surface are arranged at intervals along the width direction of the flexible bag body; wherein, the grouting holes are arranged on the first side surface, and the grouting holes are circular holes; and / or the exhaust holes are arranged on the second side surface, and the exhaust holes are circular holes.

[0016] According to another aspect of the present utility model, there is provided a gob-side entry retaining support structure, including: a plurality of gob-side entry retaining filling bags arranged and connected in sequence in a first direction to form a plurality of bag body connection parts, the length directions of the respective gob-side entry retaining filling bags are all parallel to the first direction, and concrete is filled in each gob-side entry retaining filling bag; a plurality of roof beam assemblies, the plurality of roof beam assemblies are arranged at intervals in the first direction on the roof, the plurality of roof beam assemblies are arranged in one-to-one correspondence with the plurality of gob-side entry retaining filling bags, and each roof beam assembly includes a plurality of π-shaped steel beams, and the plurality of π-shaped steel beams are arranged in one-to-one correspondence with a plurality of grooves on the flexible bag body of the corresponding gob-side entry retaining filling bag; a plurality of support assemblies, the plurality of support assemblies are arranged in one-to-one correspondence with the plurality of bag body connection parts, each support assembly includes a plurality of I-beams, one end of each I-beam is inserted into a joint installation hole on the flexible bag body of a corresponding gob-side entry retaining filling bag, and one end of each I-beam is inserted into a joint installation hole on the flexible bag body of another corresponding gob-side entry retaining filling bag.

[0017] Further, the gob-side entry retaining filling bag includes two load-bearing pipes, and the gob-side entry retaining support structure includes: two filling support assemblies, the two filling support assemblies are arranged corresponding to one of the gob-side entry retaining filling bags to be filled among the plurality of gob-side entry retaining filling bags, the two filling support assemblies are arranged at intervals in the width direction of the flexible bag body of the corresponding gob-side entry retaining filling bag and are respectively located on opposite sides of the flexible bag body, the two filling support assemblies are respectively arranged corresponding to the two load-bearing pipes, and each filling support assembly includes a plurality of hydraulic struts arranged at intervals in the length direction of the flexible bag body; the sleeves of the respective hydraulic struts are arranged on the support base surface of the flexible bag body, and the telescopic rods of the respective hydraulic struts are movably arranged in a direction close to or away from the support base surface to support and lift the corresponding load-bearing pipe so as to support the flexible bag body of the corresponding gob-side entry retaining filling bag to facilitate filling of the flexible bag body.

[0018] Furthermore, the gob-side entry retaining support structure includes: a plurality of first side support assemblies, which are arranged in one-to-one correspondence with a plurality of gob-side entry retaining filling bags. Each first side support assembly includes two steel bar meshes, and the two steel bar meshes are spaced apart on opposite sides of the flexible bag body of the corresponding gob-side entry retaining filling bag along the width direction of the flexible bag body; a plurality of second side support assemblies, which are arranged in one-to-one correspondence with the plurality of first side support assemblies. Each second side support assembly includes two ladder beam combinations, and each ladder beam combination includes a plurality of steel bar ladder beams. The plurality of steel bar ladder beams are arranged in a grid-like cross pattern to form a plurality of cross positions, and each steel bar ladder beam is tied to the corresponding steel bar mesh; a plurality of connecting assemblies, which are arranged in one-to-one correspondence with the plurality of second side support assemblies. Each connecting assembly includes an anchor bolt combination corresponding to the corresponding second side support assembly. The anchor bolt combination includes a plurality of tension bolts, and the plurality of tension bolts are arranged in one-to-one correspondence with the plurality of cross positions of each ladder beam combination of the corresponding second side support assembly. Each end of each tension bolt is used to connect the corresponding cross position to the corresponding steel bar mesh.

[0019] Furthermore, the gob-side entry retaining support structure includes: a plurality of protection assemblies, which are arranged in one-to-one correspondence with the plurality of first side support assemblies. Each protection assembly includes two guard plate combinations, and the two guard plate combinations are arranged corresponding to the two steel bar meshes of the corresponding first side support assembly; each guard plate combination includes a plurality of W-shaped steel guard plates, and each W-shaped steel guard plate is arranged on the corresponding steel bar mesh, and each W-shaped steel guard plate is installed at a position on the corresponding steel bar mesh close to the top surface of the flexible bag body of the corresponding gob-side entry retaining filling bag.

[0020] Applying the technical solution of the present utility model, the gob-side entry retaining filling bag of the present utility model includes: a flexible bag body, the flexible bag body includes a top surface, a bottom surface, and four side surfaces located between the top surface and the bottom surface and sequentially connected to jointly enclose a filling cavity, and exhaust holes and grouting holes communicated with the filling cavity are arranged at intervals on the flexible bag body; the four side surfaces include a first connection surface and a second connection surface, and the first connection surface and the second connection surface are arranged at intervals along the length direction of the flexible bag body; among adjacent two gob-side entry retaining filling bags, the first connection surface of one gob-side entry retaining filling bag is correspondingly arranged with the second connection surface of the other gob-side entry retaining filling bag; wherein, a plurality of grooves are arranged on the top surface, and the plurality of grooves are used for plugging and matching with a plurality of π-shaped steel beams installed on the roof of the gob-side entry one by one; a plurality of joint installation holes are arranged on both the first connection surface and the second connection surface, and each joint installation hole is used for one end of an I-beam to pass through. In this way, on the one hand, the gob-side entry retaining filling bag of the present utility model is provided with a plurality of grooves on the top surface of the flexible bag body to plug and match with a plurality of π-shaped steel beams on the roof of the gob-side entry one by one. The grooves can adapt to the defect of insufficient grouting between the π-shaped steel beams, so that it can fully contact the roof during grouting and increase the compressive strength of the roof; on the other hand, by arranging a plurality of joint installation holes on the first connection surface and the second connection surface for one end of the I-beam to pass through, the I-beam can connect and support adjacent two gob-side entry retaining filling bags, effectively solving the problems that there are gaps between the upper part of the flexible film bag and the roof in the prior art, and it is easy for the flexible film walls to be misaligned, inclined or even collapsed as the mining difficulty increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0022] Figure 1 FIG. shows a schematic structural view of an embodiment of the gob-side entry retaining filling bag according to the present utility model;

[0023] Figure 2 FIG. shows a front view of an embodiment of the gob-side entry retaining filling bag according to the present utility model;

[0024] Figure 3 FIG. shows a top view of an embodiment of the gob-side entry retaining filling bag according to the present utility model.

[0025] Wherein, the above-mentioned drawings include the following reference numerals:

[0026] 1. Lifting ring; 2. Bearing pipe; 3. Exhaust hole; 4. Grouting hole; 5. Sleeve; 6. π-shaped steel beam; 7. Flexible bag body; 8. I-beam; 9. Hydraulic prop; 10. Groove; 11. First bag body joint; 12. Opposing tension bolt; 13. W-shaped steel guard plate; 14. Reinforced steel ladder beam; 15. Reinforcement mesh;

[0027] 71. Top surface; 72. Bottom surface; 73. Side surface; 74. First connection surface; 75. Second connection surface;

[0028] 731. First side surface; 732. Second side surface;

[0029] 80. Joint installation hole; 90. Sleeve; 91. Telescopic rod;

[0030] 111. Second bag body joint. Specific implementation mode

[0031] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to detail the present utility model.

[0032] As Figures 1 to 3 shown, the gob-side entry retaining filling bag of the present utility model includes: a flexible bag body 7, the flexible bag body 7 includes a top surface 71, a bottom surface 72, and four side surfaces 73 located between the top surface 71 and the bottom surface 72 and connected in sequence to jointly enclose a filling cavity. The flexible bag body 7 is provided with exhaust holes 3 and grouting holes 4 that are spaced apart and communicate with the filling cavity; the four side surfaces 73 include a first connection surface 74 and a second connection surface 75, and the first connection surface 74 and the second connection surface 75 are spaced apart along the length direction of the flexible bag body 7; in adjacent two gob-side entry retaining filling bags, the first connection surface 74 of one gob-side entry retaining filling bag is correspondingly arranged with the second connection surface 75 of the other gob-side entry retaining filling bag; wherein, a plurality of grooves 10 are provided on the top surface 71, and the plurality of grooves 10 are used for plugging and matching with a plurality of π-shaped steel beams 6 installed on the roof of the gob-side entry one by one; a plurality of joint installation holes 80 are provided on both the first connection surface 74 and the second connection surface 75, and each joint installation hole 80 is used for one end of the I-beam 8 to pass through.

[0033] In this way, on the one hand, the gob-side entry retaining filling bag of the present utility model is provided with a plurality of grooves 10 on the top surface 71 of the flexible bag body 7 to be inserted and matched with a plurality of π-shaped steel beams 6 on the roof of the gob-side entry retaining one by one. The grooves 10 can adapt to the defect of insufficient grouting between the π-shaped steel beams 6, so that when grouting, it can fully contact the roof, increasing the compressive strength of the roof. On the other hand, a plurality of joint mounting holes 80 are provided on the first connection surface 74 and the second connection surface 75 for one end of the I-beam 8 to pass through, so that the I-beam 8 can connect and support two adjacent gob-side entry retaining filling bags, effectively solving the problems that there are gaps between the upper part of the flexible film bag and the roof in the prior art, and the flexible film walls are prone to dislocation, inclination or even collapse as the mining difficulty increases.

[0034] As Figure 1 shown, the gob-side entry retaining filling bag includes two sleeving components, which are respectively arranged corresponding to the first connection surface 74 and the second connection surface 75. Each sleeving component includes a plurality of sleeves 5, and the plurality of sleeves 5 are respectively installed at a corresponding plurality of joint mounting holes 80; wherein, one end of each sleeve 5 is connected to the corresponding joint mounting hole 80, and the other end of each sleeve 5 extends into the corresponding filling cavity, and the sleeve 5 is used for sleeving outside the corresponding I-beam 8.

[0035] Specifically, the size of the sleeve 5 is set according to the size of the I-beam 8 to sleeve the sleeve 5 outside the I-beam 8.

[0036] Among them, after the concrete in the flexible bag body 7 of each gob-side entry retaining filling bag solidifies, the plurality of gob-side entry retaining filling bags become an integral body, improving the stability of the gob-side entry retaining filling bag and preventing the gob-side entry retaining support structure composed of the gob-side entry retaining filling bags from being affected by the lateral thrust of the caving rock mass in the goaf and suffering from dislocation, inclination and collapse.

[0037] The present utility model is provided with sleeves 5 on both sides of the flexible bag body 7, and when installing the I-beam 8 during construction, it can make the plurality of gob-side entry retaining filling bags interlock with each other, preventing a single gob-side entry retaining filling bag from being dislocated, inclined or collapsed.

[0038] As Figures 1 to 2 shown, the gob-side entry retaining filling bag includes two lifting components, which are arranged at intervals along the width direction of the flexible bag body 7 and are respectively located on the opposite sides of the flexible bag body 7. Each lifting component includes a plurality of lifting rings 1 arranged at intervals along the length direction of the flexible bag body 7; wherein, the lower side of each lifting ring 1 is connected to the flexible bag body 7, the upper side of each lifting ring 1 is higher than the top surface 71, and each lifting ring 1 is used for being tied to the roof steel mesh installed on the roof.

[0039] As Figure 1As shown in the figure, the gob-side entry retaining filling bag includes two load-bearing pipes 2, which are arranged at intervals along the width direction of the flexible bag body 7 and are respectively located on the opposite sides of the flexible bag body 7. Each load-bearing pipe 2 extends along the length direction of the flexible bag body 7, and the top of each load-bearing pipe 2 is flush with the bottom surface of the groove 10, so as to support the flexible bag body 7 of the gob-side entry retaining filling bag to be filled by supporting the two load-bearing pipes 2.

[0040] As Figure 1 shown in the figure, there are two first joint assemblies, which are arranged at intervals along the width direction of the flexible bag body 7 and are respectively located on the opposite sides of the first connection surface 74. Each first joint assembly includes a plurality of first bag joints 11 arranged at intervals along the height direction of the flexible bag body 7; there are two second joint assemblies, which are arranged at intervals along the width direction of the flexible bag body 7 and are respectively located on the opposite sides of the second connection surface 75. Each second joint assembly includes a plurality of second bag joints 111 arranged at intervals along the height direction of the flexible bag body 7; the two first joint assemblies and the two second joint assemblies are arranged in one-to-one correspondence, and the plurality of first bag joints 11 of each first joint assembly and the plurality of second bag joints 111 of the corresponding second joint assembly are arranged in one-to-one correspondence; wherein, among two adjacent gob-side entry retaining filling bags, each first bag joint 11 of one gob-side entry retaining filling bag is used to be connected with each second bag joint 111 of the other gob-side entry retaining filling bag in one-to-one correspondence.

[0041] Specifically, the four side surfaces 73 include a first side surface 731 and a second side surface 732, and the first side surface 731 and the second side surface 732 are arranged at intervals along the width direction of the flexible bag body 7; wherein, the grouting holes 4 are arranged on the first side surface 731, and the grouting holes 4 are circular holes; and / or the exhaust holes 3 are arranged on the second side surface 732, and the exhaust holes 3 are circular holes.

[0042] As Figures 1 to 3As shown in the figure, the utility model also provides a gob-side entry retaining support structure, including: a plurality of gob-side entry retaining filling bags arranged and connected in sequence along a first direction to form a plurality of bag body connection parts. The length direction of each gob-side entry retaining filling bag is parallel to the first direction, and each gob-side entry retaining filling bag is filled with concrete; a plurality of roof beam assemblies, which are arranged on the roof at intervals along the first direction. The plurality of roof beam assemblies are arranged in one-to-one correspondence with the plurality of gob-side entry retaining filling bags. Each roof beam assembly includes a plurality of π-shaped steel beams 6, and the plurality of π-shaped steel beams 6 are arranged in one-to-one correspondence with a plurality of grooves 10 on the flexible bag body 7 of the corresponding gob-side entry retaining filling bag; a plurality of support assemblies, which are arranged in one-to-one correspondence with the plurality of bag body connection parts. Each support assembly includes a plurality of I-beams 8. One end of each I-beam 8 is inserted into a joint installation hole 80 on the flexible bag body 7 of a corresponding gob-side entry retaining filling bag, and one end of each I-beam 8 is inserted into a joint installation hole 80 on the flexible bag body 7 of another corresponding gob-side entry retaining filling bag.

[0043] Specifically, the size of the groove 10 is designed according to the size of the π-shaped steel beam 6 so as to be arranged in one-to-one correspondence with the π-shaped steel beam 6.

[0044] On the one hand, the groove 10 of the gob-side entry retaining filling bag of the utility model can solve the defect of incomplete grouting of the π-shaped steel beam 6 in the prior art, so that full roof contact can be achieved during grouting, increasing the roof compressive strength. On the other hand, due to the action of the filling pressure during filling, the gap between the gob-side entry retaining filling bag and the roof can be well reduced to prevent air leakage, thereby preventing the oxidation and spontaneous combustion of the floating coal in the goaf.

[0045] As Figure 1 shown, the gob-side entry retaining filling bag includes two bearing pipes 2. The gob-side entry retaining support structure includes: two filling and support assemblies, which are arranged corresponding to one of the gob-side entry retaining filling bags to be filled among the plurality of gob-side entry retaining filling bags. The two filling and support assemblies are arranged at intervals along the width direction of the flexible bag body 7 of the corresponding gob-side entry retaining filling bag and are respectively located on opposite sides of the flexible bag body 7. The two filling and support assemblies are respectively arranged corresponding to the two bearing pipes 2. Each filling and support assembly includes a plurality of hydraulic struts 9 arranged at intervals along the length direction of the flexible bag body 7; the sleeve 90 of each hydraulic strut 9 is arranged on the support base surface of the flexible bag body 7, and the telescopic rod 91 of each hydraulic strut 9 is movably arranged along the direction of approaching or departing from the support base surface to support and lift the corresponding bearing pipe 2 so as to support the flexible bag body 7 of the corresponding gob-side entry retaining filling bag to facilitate the filling of the flexible bag body 7.

[0046] As Figure 1 and Figure 2As shown in the figure, the gob-side entry retaining support structure includes: a plurality of first side support components, which are arranged in one-to-one correspondence with a plurality of gob-side entry retaining filling bags. Each first side support component includes two steel mesh sheets 15, and the two steel mesh sheets 15 are arranged at intervals on the opposite sides of the flexible bag body 7 of the corresponding gob-side entry retaining filling bag along the width direction of the flexible bag body 7; a plurality of second side support components, which are arranged in one-to-one correspondence with the plurality of first side support components. Each second side support component includes two ladder beam combinations, and each ladder beam combination includes a plurality of steel bar ladder beams 14. The plurality of steel bar ladder beams 14 are arranged in a grid-like cross pattern to form a plurality of cross positions, and each steel bar ladder beam 14 is tied to the corresponding steel mesh sheet 15; a plurality of connection components, which are arranged in one-to-one correspondence with the plurality of second side support components. Each connection component includes an anchor bolt combination corresponding to the corresponding second side support component. The anchor bolt combination includes a plurality of tension bolts 12, and the plurality of tension bolts 12 are arranged in one-to-one correspondence with the plurality of cross positions of each ladder beam combination of the corresponding second side support component. Each end of each tension bolt 12 is used to connect the corresponding cross position to the corresponding steel mesh sheet 15.

[0047] As Figure 2 shown in the figure, the gob-side entry retaining support structure includes: a plurality of protection components, which are arranged in one-to-one correspondence with the plurality of first side support components. Each protection component includes two guard plate combinations, and the two guard plate combinations are arranged corresponding to the two steel mesh sheets 15 of the corresponding first side support component; each guard plate combination includes a plurality of W-shaped steel guard plates 13, and each W-shaped steel guard plate 13 is arranged on the corresponding steel mesh sheet 15, and each W-shaped steel guard plate 13 is installed at a position on the corresponding steel mesh sheet 15 close to the top surface 71 of the flexible bag body 7 of the corresponding gob-side entry retaining filling bag.

[0048] The using method of the gob-side entry retaining filling bag of the present utility model is as follows:

[0049] (1) Send the processed gob-side entry retaining filling bag and its accessory components to the underground installation site. First, at the position where the gob-side entry retaining support structure is constructed, erect the π-shaped steel beam 6, then raise the unit support to support the π-shaped steel beam 6, and transport the individual gob-side entry retaining filling bag to be spread under the π-shaped steel beam 6.

[0050] (2) Place hydraulic props 9 on both sides of the flexible bag body 7 of the gob-side entry retaining filling bag in the length direction, place the bearing pipe 2 on the hydraulic props 9, and the plurality of grooves 10 respectively correspond to the positions of the plurality of π-shaped steel beams 6. Slowly raise the hydraulic props 9. When the bearing pipe 2 touches the π-shaped steel beam 6, stop the rising of the hydraulic props 9.

[0051] (3) Lift the lifting ring 1 and tie it to the roof steel mesh. Insert the I-beams 8 on both sides of the flexible bag body 7 into the sleeves 5 at both ends of the flexible bag body 7 respectively. Place the steel meshes 15 vertically on both sides of the flexible bag body 7 in the length direction. Insert the tension bolts 12 into the corresponding sleeve tubes respectively. Tie the steel bar ladder beams 14 to the steel meshes 15 respectively. Install the W-steel plates 13 at the upper positions of the steel meshes 15. Install all the bearing plates and nuts of the tension bolts 12.

[0052] (4) Connect the grouting holes 4 and the pumping grouting pipes. Start the concrete grouting pump to fill the flexible bag body 7.

[0053] (5) When the flexible bag body 7 is filled and the flexible bag body 7 is in close contact with the roof of the gob-side entry retaining, under the condition of tight sealing, remove the pumping grouting pipe and tie and seal the grouting holes 4 and the exhaust holes 3.

[0054] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0055] As Figures 1 to 3 shown, the flexible bag body 7 includes a top surface 71, a bottom surface 72, and four side surfaces 73 located between the top surface 71 and the bottom surface 72 and connected in sequence to jointly enclose a filling cavity. The flexible bag body 7 is provided with exhaust holes 3 and grouting holes 4 communicating with the filling cavity at intervals; the four side surfaces 73 include a first connecting surface 74 and a second connecting surface 75, and the first connecting surface 74 and the second connecting surface 75 are arranged at intervals in the length direction of the flexible bag body 7; in adjacent gob-side entry retaining filling bags, the first connecting surface 74 of one gob-side entry retaining filling bag is correspondingly arranged with the second connecting surface 75 of another gob-side entry retaining filling bag; wherein, a plurality of grooves 10 are provided on the top surface 71, and the plurality of grooves 10 are used for plugging and matching with a plurality of π-shaped steel beams 6 installed on the roof of the gob-side entry retaining one by one; a plurality of joint mounting holes 80 are provided on both the first connecting surface 74 and the second connecting surface 75, and each joint mounting hole 80 is used for one end of the I-beam 8 to pass through. In this way, on the one hand, the gob-side entry retaining filling bag of the present utility model is provided with a plurality of grooves 10 on the top surface 71 of the flexible bag body 7 to plug and match with a plurality of π-shaped steel beams 6 on the roof of the gob-side entry retaining one by one. The grooves 10 can adapt to the defect of insufficient grouting between the π-shaped steel beams 6, so that it can fully contact the roof during grouting and increase the compressive strength of the roof; on the other hand, by providing a plurality of joint mounting holes 80 on the first connecting surface 74 and the second connecting surface 75 for one end of the I-beam 8 to pass through, the I-beam 8 can connect and support adjacent gob-side entry retaining filling bags, effectively solving the problems in the prior art that there are gaps between the upper part of the flexible film bag and the roof and that the flexible film walls are prone to dislocation, inclination or even collapse as the mining difficulty increases.

[0056] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0057] Unless otherwise specifically stated, the relative arrangements of the components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

[0058] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0059] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, the device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0060] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present application.

[0061] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A gob-side entry retaining filling bag, characterized in that, Comprising: A flexible bag body (7), the flexible bag body (7) includes a top surface (71), a bottom surface (72), and four side surfaces (73) located between the top surface (71) and the bottom surface (72) and connected in sequence to jointly enclose a filling cavity. The flexible bag body (7) is provided with exhaust holes (3) and grouting holes (4) that are spaced apart and communicate with the filling cavity; The four side surfaces (73) include a first connection surface (74) and a second connection surface (75), and the first connection surface (74) and the second connection surface (75) are spaced apart along the length direction of the flexible bag body (7); in adjacent two gob-side entry retaining filling bags, the first connection surface (74) of one gob-side entry retaining filling bag is correspondingly arranged with the second connection surface (75) of the other gob-side entry retaining filling bag; Wherein, a plurality of grooves (10) are provided on the top surface (71), and the plurality of grooves (10) are used for plugging and matching with a plurality of π-shaped steel beams (6) installed on the roof of the gob-side entry retaining one by one; a plurality of joint installation holes (80) are provided on both the first connection surface (74) and the second connection surface (75), and each of the joint installation holes (80) is used for one end of an I-beam (8) to pass through.

2. The gob-side entry retaining filling bag according to claim 1, wherein The gob-side entry retaining filling bag includes two sleeving components, the two sleeving components are correspondingly arranged with the first connection surface (74) and the second connection surface (75) respectively, and each of the sleeving components includes a plurality of sleeves (5), and the plurality of sleeves (5) are installed at the corresponding plurality of joint installation holes (80) one by one; Wherein, one end of each of the sleeves (5) is connected to the corresponding joint installation hole (80), and the other end of each of the sleeves (5) extends into the corresponding filling cavity, and the sleeve (5) is used for sleeving outside the corresponding I-beam (8).

3. The gob-side entry retaining filling bag according to claim 1, wherein The gob-side entry retaining filling bag includes two lifting components, the two lifting components are spaced apart along the width direction of the flexible bag body (7) and are respectively located on opposite sides of the flexible bag body (7), and each lifting component includes a plurality of lifting rings (1) spaced apart along the length direction of the flexible bag body (7); Wherein, the lower side of each of the lifting rings (1) is connected to the flexible bag body (7), the upper side of each of the lifting rings (1) is higher than the top surface (71), and each of the lifting rings (1) is used for being tied to a roof steel mesh installed on the roof.

4. The gob-side entry retaining filling bag according to claim 1, characterized in that, The gob-side entry retaining filling bag includes two load-bearing pipes (2). The two load-bearing pipes (2) are arranged at intervals along the width direction of the flexible bag body (7) and are respectively located on opposite sides of the flexible bag body (7). Each of the load-bearing pipes (2) extends along the length direction of the flexible bag body (7). The tops of the load-bearing pipes (2) are flush with the bottom surface of the groove (10), so as to support the flexible bag body (7) of the gob-side entry retaining filling bag to be filled by supporting the two load-bearing pipes (2).

5. The gob-side entry retaining filling bag according to claim 1, wherein The gob-side entry retaining filling bag includes: Two first joint assemblies. The two first joint assemblies are arranged at intervals along the width direction of the flexible bag body (7) and are respectively located on opposite sides of the first connection surface (74). Each of the first joint assemblies includes a plurality of first bag joints (11) arranged at intervals along the height direction of the flexible bag body (7). Two second joint assemblies. The two second joint assemblies are arranged at intervals along the width direction of the flexible bag body (7) and are respectively located on opposite sides of the second connection surface (75). Each of the second joint assemblies includes a plurality of second bag joints (111) arranged at intervals along the height direction of the flexible bag body (7). The two first joint assemblies and the two second joint assemblies are arranged in one-to-one correspondence. The plurality of first bag joints (11) of each first joint assembly and the plurality of second bag joints (111) of the corresponding second joint assembly are arranged in one-to-one correspondence. Wherein, in two adjacent gob-side entry retaining filling bags, each of the first bag joints (11) of one gob-side entry retaining filling bag is used to be connected with each of the second bag joints (111) of the other gob-side entry retaining filling bag in one-to-one correspondence.

6. The gob-side entry retaining filling bag according to any one of claims 1 to 5, characterized in that, The four side surfaces (73) include a first side surface (731) and a second side surface (732). The first side surface (731) and the second side surface (732) are arranged at intervals along the width direction of the flexible bag body (7). Wherein, The grouting hole (4) is arranged on the first side surface (731), and the grouting hole (4) is a circular hole; and / or The exhaust hole (3) is arranged on the second side surface (732), and the exhaust hole (3) is a circular hole.

7. A gob-side entry retaining support structure, characterized in that, Includes: The gob-side entry retaining filling bag according to any one of claims 1 to 6. A plurality of the gob-side entry retaining filling bags are arranged and connected in sequence along the first direction to form a plurality of bag body connection joints. The length direction of each of the gob-side entry retaining filling bags is parallel to the first direction, and each of the gob-side entry retaining filling bags is filled with concrete. A plurality of roof beam assemblies. The plurality of roof beam assemblies are arranged at intervals along the first direction on the roof. The plurality of roof beam assemblies and the plurality of gob-side entry retaining filling bags are arranged in one-to-one correspondence. Each of the roof beam assemblies includes a plurality of π-shaped steel beams (6). The plurality of π-shaped steel beams (6) and a plurality of grooves (10) on the flexible bag body (7) of the corresponding gob-side entry retaining filling bag are arranged in one-to-one correspondence. A plurality of support components are respectively arranged corresponding to the connection positions of the plurality of bag bodies. Each of the support components includes a plurality of I-beams (8). One end of each I-beam (8) is inserted into a joint installation hole (80) on the flexible bag body (7) of a corresponding gob-side entry retaining filling bag, and one end of each I-beam (8) is inserted into a joint installation hole (80) on the flexible bag body (7) of another corresponding gob-side entry retaining filling bag.

8. The gob-side entry retaining support structure according to claim 7, characterized in that, The gob-side entry retaining filling bag includes two load-bearing pipes (2), and the gob-side entry retaining support structure includes: Two filling support components, which are arranged corresponding to one of the gob-side entry retaining filling bags to be filled among the plurality of gob-side entry retaining filling bags. The two filling support components are spaced along the width direction of the flexible bag body (7) of the corresponding gob-side entry retaining filling bag and are respectively located on opposite sides of the flexible bag body (7). The two filling support components are respectively arranged corresponding to the two load-bearing pipes (2). Each of the filling support components includes a plurality of hydraulic struts (9) spaced along the length direction of the flexible bag body (7); The sleeve (90) of each hydraulic strut (9) is arranged on the support base surface of the flexible bag body (7), and the telescopic rod (91) of each hydraulic strut (9) is movably arranged along the direction close to or away from the support base surface to support and lift the corresponding load-bearing pipe (2) and lift the flexible bag body (7) of the corresponding gob-side entry retaining filling bag, so as to facilitate the filling of the flexible bag body (7).

9. The gob-side entry retaining support structure according to claim 7, characterized in that, The gob-side entry retaining support structure includes: A plurality of first side support components, which are respectively arranged corresponding to the plurality of gob-side entry retaining filling bags. Each of the first side support components includes two steel wire meshes (15), and the two steel wire meshes (15) are spaced along the width direction of the flexible bag body (7) of the corresponding gob-side entry retaining filling bag and are located on opposite sides of the flexible bag body (7); A plurality of second side support components, which are respectively arranged corresponding to the plurality of first side support components. Each of the second side support components includes two ladder beam combinations, and each ladder beam combination includes a plurality of steel bar ladder beams (14). The plurality of steel bar ladder beams (14) are arranged in a grid-like cross pattern to form a plurality of cross positions, and each steel bar ladder beam (14) is tied to the corresponding steel wire mesh (15); A plurality of connection components, which are respectively arranged corresponding to the plurality of second side support components. Each of the connection components includes an anchor rod combination corresponding to the corresponding second side support component. The anchor rod combination includes a plurality of tension bolts (12), and the plurality of tension bolts (12) are respectively arranged corresponding to the plurality of cross positions of each ladder beam combination of the corresponding second side support component. Each end of each tension bolt (12) is used to connect the corresponding cross position to the corresponding steel wire mesh (15).

10. The gob-side entry retaining support structure according to claim 9, characterized in that, The gob-side entry retaining support structure includes: a plurality of protection components, the plurality of protection components are arranged in one-to-one correspondence with the plurality of first side support components, each of the protection components includes two guard plate combinations, and the two guard plate combinations are arranged corresponding to the two steel bar meshes (15) of the corresponding first side support component; each of the guard plate combinations includes a plurality of W-shaped steel guard plates (13), each of the W-shaped steel guard plates (13) is arranged on the corresponding steel bar mesh (15), and each of the W-shaped steel guard plates (13) is installed at a position on the corresponding steel bar mesh (15) close to the top surface (71) of the flexible bag body (7) of the corresponding gob-side entry retaining filling bag.

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