A mine-use blocking, supporting, blocking and filling lane retaining method

Abstract

A mine-used blocking, supporting, retaining and filling lane retaining method relates to the technical field of coal mine filling and mining, and solves the problems of low construction efficiency, high cost, great safety risk and damage to surface buildings in the existing lane retaining method. The method comprises four steps: blocking with side lane isolation plates of the lane retaining, supporting with pillars of the goaf roof, combining pillars and retaining plates of the goaf to retain gangue, and filling with gangue in the goaf. No anchor cables and anchor rods are needed on the basis of the original support, which can save support materials and speed up the progress of the lane retaining; no top cutting blasting is needed, the safety risk is small and the work efficiency is high; air leakage prevention is achieved without grouting, and spontaneous combustion of the goaf of the working face is effectively prevented; the coal seam roof is prevented from sinking by filling with original gangue, and the surface buildings are protected from damage.

Description

Technical Field

[0001] The invention relates to the technical field of coal mine filling and mining, and in particular to a mine lane retaining method of blocking, supporting, blocking and filling. Background Art

[0002] With the continuous increase in the intensity of coal mining in my country, coal resources have become increasingly scarce. In order to maximize the exploitation of coal resources, coal mines need to retain lanes during the mining process. The purpose of retaining lanes is to remove the protective coal pillars between the two working faces. The existing method of retaining lanes is to adopt a design scheme based on "pre-cracking of the roof + anchor reinforcement support + surrounding rock grouting reinforcement". Through pre-cracking and cutting blasting, the stress transmission of the working face roof is cut off in a local area, the pressure of the tunnel roof is reduced, and the integrity of the tunnel roof is protected.

[0003] Although the above-mentioned method of retaining the lane has a certain effect, it has its shortcomings, which are mainly reflected in the following aspects: 1. Regardless of the roof support method or the support of the two sides, it is necessary to add additional anchor cables and anchor rods on the basis of the original support. This will not only use a lot of support materials, but also slow down the progress of retaining the lane and cause low efficiency; 2. It is necessary to cut the top blasting, and drill many blasting holes for blasting and cutting the top, which has great safety risks and low work efficiency; 3. Grouting is required to prevent air leakage. In order to prevent air leakage, concrete spraying materials are required to drill and press the top and gravel side of the lane or spray the top of the lane to plug the air leakage, thereby preventing spontaneous combustion in the goaf of the working face; 4. Through the above-mentioned method of cutting the top and retaining the lane, the coal seam roof sinks as a whole, and the corresponding surface buildings will be damaged. Summary of the invention

[0004] In view of the problems of low construction efficiency, high cost, great safety risk and damage to surface buildings in the existing lane retaining methods, the present invention provides a mine lane retaining method by blocking, supporting, blocking and filling, which has the advantages of faster construction and higher safety.

[0005] The present invention provides a mine blocking, supporting, blocking and filling lane retaining method, comprising the following steps:

[0006] Blocking: A preset number of I-beams are installed from front to back on the side of the lane retaining tunnel. Isolation plates are set in the gaps between the I-beams to complete the blocking of the isolation plates on the side of the lane retaining tunnel;

[0007] Support: After the first coal mining cycle is completed, the empty roof area of ​​the coal pillars and pillars is formed; after the second coal mining cycle is completed, the empty roof area between the pillars is formed; I-beams and a preset number of pillars are installed from left to right on the side of the reserved laneway, thereby completing the pillar support of the roof of the goaf, thereby preventing the roof of the goaf from sinking;

[0008] Blockage: Install the rock block plates between the I-beam and the pillars, and between the pillars from bottom to top, and install the first layer of rock block plates first;

[0009] Filling: The gangue is filled into the first layer of gangue retaining plate through the filling mechanism, and then the second layer of gangue retaining plate is installed. The filling mechanism fills the gangue into the second layer of gangue retaining plate, and the above cycle is repeated until the area between the I-beam and the support and between the supports is filled, completing the lane retention process of blocking, supporting, blocking and filling.

[0010] Furthermore, the isolation plate comprises a lower isolation plate, a middle isolation plate and an upper isolation plate, which are inserted in sequence from bottom to top.

[0011] Furthermore, the isolation plate includes a steel plate and rubber. The steel plate is wrapped with rubber on all sides, which not only supports the top plate, but also has a certain sealing effect, thereby preventing air leakage and effectively preventing spontaneous combustion of the goaf of the working face.

[0012] Furthermore, the filling mechanism includes a hydraulic support and a hydraulic bucket, the hydraulic bucket is connected to the hydraulic support, and the hydraulic support is respectively connected to the coal seam bottom plate and the coal seam top plate to play a supporting and fixing role.

[0013] Furthermore, the filling mechanism also includes a hydraulic support tail beam, and a gangue transportation device is arranged at the lower part of the hydraulic support tail beam to facilitate the transportation of gangue.

[0014] Furthermore, the gangue transport device is configured as a forklift or a telescopic belt conveyor.

[0015] Furthermore, when the gangue is unloaded, the hydraulic bucket is retracted to one side to make room for the space under the tail beam, and the gangue is transported by the gangue transport device and unloaded here.

[0016] Furthermore, nine layers of rock baffles are arranged between the I-beams and the pillars and between the pillars.

[0017] The beneficial effects of the present invention are: there is no need to add anchor cables and anchor rods on the basis of the original support, which can save support materials and speed up the progress of retaining lanes; there is no need for top cutting blasting, the safety risk is small and the work efficiency is high; there is no need to use grouting to prevent air leakage, and the spontaneous combustion of the goaf of the working face can be effectively prevented; by filling with native gangue, the coal seam roof can be prevented from sinking, and the surface buildings can be protected from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a main structural schematic diagram of the present invention.

[0020] Figure 2 It is a structural diagram of the AA section.

[0021] Figure 3 It is a structural diagram of the BB section.

[0022] In the figure, 1-3, pillar I, 2-3, pillar II, 3-1, pillar III, 3-2, pillar IV, 3-3, pillar V, 3-4, pillar VI, 4-1, I-beam I, 4-2, I-beam II, 4-3, I-beam III, 4-4, I-beam IV, 5-1, lower isolation plate, 5-2, middle isolation plate, 5-3, upper isolation plate, 6, hydraulic support, 7, hydraulic bucket, 8, hydraulic support tail beam, 9, gangue retaining plate. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] Example

[0025] A mine lane retaining method of blocking, supporting, blocking and filling, comprising the following steps:

[0026] Blockage: Figure 3 As shown, I-beams Ⅰ4-1, Ⅱ4-2, Ⅲ4-3 and Ⅳ4-4 are installed in sequence from front to back on the side of the lane retaining tunnel to support the roof. The gap between I-beams Ⅲ4-3 and Ⅳ4-4 is inserted with lower isolation plates 5-1, middle isolation plates 5-2 and upper isolation plates 5-3 from bottom to top. The isolation plates are made of steel plates and wrapped with rubber on all sides. They not only support the roof but also have a certain sealing effect, thus completing the blocking of the isolation plates on the side of the lane retaining tunnel. It achieves air leakage prevention and effectively prevents spontaneous combustion of the goaf of the working face.

[0027] Support: As Figure 2As shown, after the first coal mining cycle is completed, the coal pillar and the empty top area of ​​pillars Ⅰ1-3 are formed in the coal mining working face, and then the empty top area is filled as shown in the figure; after the second coal mining cycle is completed, the empty top area between pillars Ⅰ1-3 and pillars Ⅱ2-3 is formed, and then the empty top area is filled as shown in the figure; after the third coal mining cycle is completed, the empty top area between pillars Ⅱ2-3 and pillars Ⅴ3-3 is formed;

[0028] Support: Figure 1 As shown, I-beam IV4-4, pillar III3-1, pillar IV3-2, pillar V3-3, and pillar VI3-4 are installed from left to right on the side of the reserved lane, thereby completing the pillar support of the roof of the goaf, thereby preventing the roof of the goaf from sinking;

[0029] Backing: Figure 1 As shown, between the I-beam IV4-4 and the support III3-1, the baffle plate 9 is installed from bottom to top, and the first layer of baffle plates is installed first. In the figure, nine layers of baffle plates have been installed;

[0030] Filling: Figure 2 As shown, the hydraulic support 6 supports the filling mechanism, and the hydraulic bucket 7 retracts to the left. The space below the hydraulic support tail beam 8 can be used to transport the gangue by a forklift or a telescopic belt conveyor, and the gangue is unloaded here. After the hydraulic bucket 7 scoops up the unloaded gangue, the gangue is unloaded and filled in the first layer of the gangue baffle through the movement of the hydraulic mechanism; then the second layer of the gangue baffle is installed, and the hydraulic bucket 7 fills the gangue in the second layer of the gangue baffle; the above cycle is repeated until the installation of the ninth layer of the gangue baffle is completed, and the gangue in the gangue baffle is also unloaded and filled;

[0031] Then fill the area between pillars III3-1 and IV3-2 (six layers of rock-retaining plates have been installed in the figure), between pillars IV3-2 and V3-3 (four layers of rock-retaining plates have been installed in the figure), and between pillars V3-3 and VI3-4 (one layer of rock-retaining plates has been installed in the figure). Install the first layer of rock-retaining plates in turn and unload the gangue to fill it in the rock-retaining plates until the ninth layer of rock-retaining plates is installed and the gangue is unloaded and filled, completing the tunnel retention process of blocking, supporting, blocking and filling.

[0032] Although the present invention has been described in detail with reference to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention. Any person of ordinary skill in the art may easily think of changes or substitutions within the technical scope disclosed by the present invention, and these shall be within the scope of protection of the present invention.

Claims

1. A mine blocking, supporting, blocking and filling lane retaining method, characterized in that: The following steps are involved: Blocking: A preset number of I-beams are installed from front to back on the side of the lane retaining tunnel. Isolation plates are set in the gaps between the I-beams to complete the blocking of the isolation plates on the side of the lane retaining tunnel; Support: After the first coal mining cycle is completed, the empty roof area of ​​the coal pillars and pillars is formed; after the second coal mining cycle is completed, the empty roof area between the pillars is formed; I-beams and a preset number of pillars are installed from left to right on the side of the reserved laneway, thereby completing the pillar support of the roof of the goaf, thereby preventing the roof of the goaf from sinking; Blockage: Install the rock block plates between the I-beam and the pillars, and between the pillars from bottom to top, and install the first layer of rock block plates first; Filling: The gangue is filled into the first layer of gangue retaining plate through the filling mechanism, and then the second layer of gangue retaining plate is installed. The filling mechanism fills the gangue into the second layer of gangue retaining plate, and the above cycle is repeated until the area between the I-beam and the support and between the supports is filled, completing the lane retention process of blocking, supporting, blocking and filling.

2. The mine blocking, supporting, retaining and filling lane retaining method according to claim 1 is characterized in that: The isolation plate comprises a lower isolation plate, a middle isolation plate and an upper isolation plate, which are inserted in sequence from bottom to top.

3. The mine blocking, supporting, retaining and filling lane retaining method according to claim 1 is characterized in that: The isolation plate comprises a steel plate and rubber, wherein the steel plate is wrapped with rubber.

4. The mine blocking, supporting, retaining and filling lane retaining method according to claim 1 is characterized in that: The filling mechanism comprises a hydraulic support and a hydraulic bucket. The hydraulic bucket is connected to the hydraulic support, and the hydraulic support is respectively connected to the coal seam bottom plate and the coal seam top plate to play a supporting and fixing role.

5. The mine blocking, supporting, retaining and filling lane retaining method according to claim 4 is characterized in that: The filling mechanism also includes a hydraulic support tail beam, and a gangue transport device is arranged at the lower part of the hydraulic support tail beam.

6. The mine blocking, supporting, retaining and filling lane retaining method according to claim 5 is characterized in that: The gangue transport device is configured as a forklift or a telescopic belt conveyor.

7. The mine blocking, supporting, retaining and filling lane retaining method according to claim 5 is characterized in that: When the gangue is unloaded, the hydraulic bucket is retracted to one side to make room for the space under the tail beam of the hydraulic support, and the gangue is transported by the gangue transport device and unloaded here.

8. The mine blocking, supporting, retaining and filling lane retaining method according to claim 1 is characterized in that: There are nine layers of rock retaining plates between the I-beams and the pillars, and between the pillars.

9. The mine blocking, supporting, retaining and filling lane retaining method according to any one of claims 1 to 8, characterized in that: This method is used for backfill mining in coal mines.

Images