Filling method for fully mechanized coal mining face with parallel operation

Abstract

The present application relates to the technical field of coal mining, and provides a kind of filling method of fully mechanized working face parallel operation of mining, it includes: S1, before mining in working face, set up filling hole drilling field in the crossheading away from working face;S2, in roof strata, along the trend of working face, horizontal long borehole is arranged from filling hole drilling field, and filling channel is formed;S3, filling material is made into slurry, and is transported to the filling area to be filled by filling hole drilling field and filling channel;S4, with working face advancing, roof gradually collapses, and filling port of filling channel advances along the construction direction of working face, while mining and working face filling operation are carried out in working face.This application does not need to install and disassemble filling pipeline, shortens construction time, reduces labor cost;When mining in working face, filling port of filling channel advances with the advancement of working face, and working face filling operation and working face mining operation do not affect each other, working face mining and working face filling can be carried out simultaneously, and working efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of coal mining technology, and in particular to a method for backfilling in a fully mechanized mining face with parallel mining and backfilling operations. Background Technology

[0002] Current face backfilling methods involve preparing slurry at surface or underground backfilling stations, then using dedicated backfilling pipelines to fill the goaf through pre-reserved backfilling openings on the face supports. During face advancement, backfilling operations must be carried out on the face, requiring dedicated backfilling teams and consuming significant manpower. Furthermore, the backfill material must solidify before coal mining can proceed, causing backfilling and mining operations to interfere with each other, resulting in low efficiency. Repeated installation and disassembly of pipelines also leads to a large workload and high labor intensity for workers. These existing face backfilling methods suffer from problems that urgently need optimization to improve the coal production capacity of backfilled faces. Summary of the Invention

[0003] This invention provides a method for filling fully mechanized mining faces in parallel mining operations, which solves the defects of existing face filling methods, such as high manpower consumption, large workload, high labor intensity and low work efficiency.

[0004] This invention provides a backfilling method for fully mechanized mining faces in parallel mining and backfilling operations, comprising:

[0005] S1. Before the working face is mined, a filling hole drilling site is set up in the roadway away from the working face;

[0006] S2. Within the top rock strata, horizontal long boreholes are arranged along the working face from the filling hole drilling site to form a filling channel;

[0007] S3. The filling material is made into a slurry and transported to the area to be filled through the filling hole drill site and the filling channel;

[0008] S4. As the working face advances, the roof gradually collapses, and the filling port of the filling channel advances along the construction direction of the working face, while the working face is simultaneously mined and filled.

[0009] According to the present invention, a method for backfilling a fully mechanized longwall face in parallel mining operations is provided. In step S1, before the longwall face is mined back, a backfilling hole drilling site is set up in the roadway away from the longwall face. Specifically:

[0010] Before the working face is mined, a filling hole drilling site is set up in the roadway at a horizontal distance of more than 500 meters away from the working face.

[0011] According to the present invention, a filling method for a fully mechanized mining face in which mining and filling operations are carried out in parallel is provided, wherein the filling hole drilling site is arranged in the roadway on one side or in the roadways on both sides.

[0012] According to the present invention, a method for filling a fully mechanized mining face in parallel mining operations includes step S2, in which horizontal long boreholes are arranged along the strike of the working face from the filling hole drilling site within the roof strata to form a filling channel, specifically including:

[0013] In the upper middle or top of the caving zone, long horizontal boreholes are arranged along the working face from the filling hole drilling site to form a filling channel for the caving zone.

[0014] According to the present invention, a method for backfilling a fully mechanized mining face in parallel mining operations is provided. In step S4, as the working face advances, the roof gradually collapses, and the backfilling opening of the backfilling channel advances along the construction direction of the working face. Specifically, this includes:

[0015] As the working face advances, the roof gradually collapses, destroying the caving zone filling channel. The filling port of the caving zone filling channel is advanced along the construction direction of the working face, while the working face is being mined and the caving zone is being filled.

[0016] According to the present invention, a method for filling a fully mechanized mining face in parallel mining operations includes step S2, in which horizontal long boreholes are arranged along the strike of the working face from the filling hole drilling site within the roof strata to form a filling channel, specifically including:

[0017] At the top of the fracture zone, horizontal long boreholes are arranged along the working face from the filling hole drilling site to form a filling channel for the fracture zone.

[0018] According to the present invention, a method for backfilling a fully mechanized mining face in parallel mining operations is provided. In step S4, as the working face advances, the roof gradually collapses, and the backfilling opening of the backfilling channel advances along the construction direction of the working face. Specifically, this includes:

[0019] As the working face advances, the fracture zone gradually develops towards the working face, forming new fracture zone filling channels and creating fracture zone filling spaces within the fracture zone. The filling opening of the fracture zone filling channel advances along the construction direction of the working face, while working face back mining and fracture zone filling operations are carried out simultaneously.

[0020] According to the present invention, a filling method for a fully mechanized mining face in parallel mining operations includes forming a filling channel in step S2, specifically comprising:

[0021] S21. Drill inclined holes from the filling hole drilling site to form a slant section for the filling channel;

[0022] S22. Drill horizontal holes along the working face from the inclined section of the filling channel to form the horizontal section of the filling channel.

[0023] According to the present invention, a method for backfilling a fully mechanized longwall face in parallel mining operations includes, in step S1, before the longwall face is mined, setting up a backfilling hole drilling site in the roadway away from the longwall face, specifically including:

[0024] Before the working face is mined, multiple filling hole drilling sites are set up in the roadway far away from the working face.

[0025] A filling method for a fully mechanized longwall mining face in parallel mining operations according to the present invention further includes:

[0026] S5. After the working face advances to the filling hole drilling site, it will move to the next filling hole drilling site for operation.

[0027] This invention provides a method for backfilling in fully mechanized mining faces with parallel mining and backfilling operations. By setting up a backfilling borehole drilling site within the roadway of the roof strata, and arranging horizontal long boreholes along the working face from the backfilling borehole drilling site, a backfilling channel is formed. Backfilling slurry is transported to the area to be backfilled through the backfilling borehole drilling site and the backfilling channel. This method replaces the existing method of arranging backfilling pipelines within the roof strata, eliminating the need for installing and dismantling backfilling pipelines, shortening construction time, reducing the workload and labor intensity of construction personnel, and lowering manpower costs. During the longwall mining operation, the backfilling opening of the backfilling channel advances with the working face, and the backfilling operation and the longwall mining operation do not interfere with each other, enabling simultaneous longwall mining and backfilling operations and improving work efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is one of the flowcharts illustrating the filling method for fully mechanized mining faces in parallel mining operations provided by the present invention;

[0030] Figure 2 This is a plan view of the fully mechanized mining face filling method for parallel mining and filling operations provided by the present invention during single-sided roadway construction.

[0031] Figure 3 This is a plan view of the fully mechanized mining face filling method for parallel mining and filling operations provided by the present invention during the construction of the double-sided roadway;

[0032] Figure 4 This is a cross-sectional view of the construction of the fully mechanized mining face filling method in parallel mining and filling operations provided by the present invention within the roof.

[0033] Figure 5 This is a cross-sectional view of the fully mechanized mining face filling method for parallel mining and filling operations provided by this invention, which involves construction within the roof, periodic collapse of the roof, and advancement of the filling port along the construction direction of the working face.

[0034] Figure label:

[0035] 11: First filling hole drilling site; 12: Second filling hole drilling site; 21: Inclined section of filling channel; 22: Horizontal section of filling channel; 23: Filling channel of fracture zone; 24: Filling channel of collapse zone; 3: Filling port; 4: Filling pipeline. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0037] The following is combined Figures 1-5 This invention describes a method for backfilling a fully mechanized longwall face in a parallel mining and backfilling operation. The method includes the following steps:

[0038] S1. Before the working face is mined, a filling hole drilling site is set up in the roadway away from the working face;

[0039] S2. Within the top rock strata, horizontal long boreholes are arranged along the working face from the filling hole drilling site to form a filling channel;

[0040] S3. The filling material is made into a filling slurry and transported to the area to be filled through the filling hole drilling site and filling channel;

[0041] S4. As the working face advances, the roof gradually collapses, and the filling port 3 of the filling channel advances along the construction direction of the working face, while the working face mining and filling operations are carried out simultaneously.

[0042] Furthermore, the filling hole drilling site can be an excavation location located within the roadway; the filling channel is a horizontal long borehole, supplying filling slurry from the equipment above ground, and transporting the filling slurry to the filling hole drilling site via filling pipeline 4, and then transporting it to the area to be filled through the filling channel, thus realizing long-distance filling operations on the filling face. When the working face is arranged in a double-lane configuration, the filling hole drilling site is preferentially located in the outer lane to avoid interference from the belt conveyor. After the filling channel is constructed, the filling hole drilling site serves as the filling operation location.

[0043] Specifically, in the embodiments of the present invention, a filling hole drilling site is set up in the roadway of the roof strata, and a filling channel is formed by drilling from the filling hole drilling site along the working face using equipment such as a kilometer-long directional drilling rig. This replaces the method of arranging filling pipelines 4 in the working face roadway and working face in the prior art. There is no need to arrange and dismantle the filling pipelines 4. During the working face mining operation, the filling port 3 of the filling channel advances with the advancement of the working face, and the working face filling operation and the working face mining operation do not affect each other. It can realize the simultaneous operation of working face mining and working face filling.

[0044] This invention provides a method for backfilling in fully mechanized mining faces with parallel mining and backfilling operations. A backfilling borehole drilling site is set up in the roadway of the roof strata. Horizontal long boreholes are arranged along the working face direction from the backfilling borehole drilling site within the roof strata to form a backfilling channel. Backfilling slurry is transported to the area to be backfilled through the backfilling borehole drilling site and the backfilling channel. This method replaces the existing method of arranging backfilling pipelines 4 in the working face roadway and working face, eliminating the need for installation and disassembly of backfilling pipelines 4, shortening construction time, reducing the workload and labor intensity of construction personnel, and lowering manpower costs. During the working face mining operation, the backfilling port 3 of the backfilling channel advances with the working face, and the backfilling operation and the working face mining operation do not interfere with each other, enabling simultaneous working face mining and backfilling operations, thus improving work efficiency.

[0045] In one embodiment of the present invention, before the working face is mined in step S1, a filling hole drilling site is set up in the roadway far away from the working face. Specifically, before the working face is mined, a filling hole drilling site is set up in the roadway at a horizontal distance of more than 500 meters from the working face.

[0046] In one embodiment of the invention, the filling hole drill site is arranged in a roadway on one side or in roadways on both sides. For example... Figure 2 As shown, this is a plan view of the filling method for fully mechanized mining faces using the parallel mining and filling operation of the present invention, constructed in a single-sided roadway. The filling hole drilling site is set up in the roadway on one side, and holes are drilled by the filling hole drilling site to form a filling channel. It can be understood that the filling channel is as follows: Figure 2 Multiple entries are shown. For example... Figure 3 As shown, this is a plan view of the fully mechanized mining face filling method using the parallel mining and filling operation of the present invention in the construction of double-sided roadways. The filling hole drilling site is set in the roadways on both sides, and the filling hole drilling site drills holes to form filling channels. It can be understood that the filling channels are as follows: Figure 3 Multiple entries are shown.

[0047] In one embodiment of the present invention, in step S2, horizontal long boreholes are arranged along the working face from the filling hole drilling site within the roof strata to form a filling channel. Specifically, this includes: in the upper middle or top of the caving zone, horizontal long boreholes are arranged along the working face from the filling hole drilling site to form a caving zone filling channel 24. In step S4, as the working face advances, the roof gradually collapses, and the filling port 3 of the filling channel advances along the working face construction direction. Specifically, this includes: as the working face advances, the roof gradually collapses, the caving zone filling channel 24 is destroyed, and the filling port 3 of the caving zone filling channel 24 advances along the working face construction direction, while simultaneously carrying out working face mining and caving zone filling operations. Figure 4 and Figure 5 As shown, by arranging a caving zone filling channel 24 in the caving zone of the roof strata, filling operations are carried out in the caving zone through the caving zone filling channel 24. As the working face advances, the roof gradually collapses, and the caving zone filling channel 24 is destroyed accordingly. The filling port 3 of the caving zone filling channel 24 is advanced along the construction direction of the working face, so that the working face mining and caving zone filling operations can be carried out simultaneously.

[0048] In one embodiment of the present invention, in step S2, horizontal long boreholes are arranged along the working face from the filling hole drilling site within the roof strata to form a filling channel. Specifically, this includes: at the top of the fracture zone, horizontal long boreholes are arranged along the working face from the filling hole drilling site to form a fracture zone filling channel 23. In step S4, as the working face advances, the roof gradually collapses, and the filling port 3 of the filling channel advances along the working face construction direction. Specifically, this includes: as the working face advances, the fracture zone gradually develops towards the working face, forming a new fracture zone filling channel 23 and creating a fracture zone filling space within the fracture zone. The filling port 3 of the fracture zone filling channel 23 advances along the working face construction direction, while working face mining and fracture zone filling operations are carried out simultaneously. Figure 4 and Figure 5 As shown, by arranging fracture zone filling channels 23 in the fracture zone of the top rock stratum, filling operations are carried out in the fracture zone through the fracture zone filling channels 23. As the working face advances, the fracture zone gradually develops towards the working face, forming new fracture zone filling channels 23 and forming fracture zone filling space within the fracture zone. The filling port 3 of the fracture zone filling channel 23 advances along the construction direction of the working face, allowing for simultaneous working face mining and fracture zone filling operations.

[0049] In one embodiment of the present invention, step S2, forming a filling channel, specifically includes: S21, drilling an inclined borehole from the filling hole drilling site to form a directional section 21 of the filling channel; S22, drilling a horizontal borehole from the directional section 21 of the filling channel along the working face to form a horizontal section 22 of the filling channel. In this embodiment, both the caving zone filling channel 24 and the fracture zone filling channel 23 include two parts, namely, the directional section 21 of the filling channel near the filling hole drilling site and the horizontal section 22 of the filling channel away from the filling hole drilling site. Figure 2 and Figure 3 As shown, during drilling, an inclined borehole is first drilled from the filling hole drilling site to form the inclined section 21 of the filling channel, and then a horizontal borehole is drilled along the working face to form the horizontal section 22 of the filling channel.

[0050] In one embodiment of the present invention, before the working face is mined in step S1, a filling hole drilling site is set up in the roadway away from the working face. Specifically, this includes setting up multiple filling hole drilling sites in the roadway away from the working face before the working face is mined. Specifically, as follows... Figure 2 and Figure 3 As shown, a filling hole drilling site is arranged, and a backup filling hole drilling site is set up along the mining direction of the working face in the filling hole drilling site. The backup filling hole drilling site also performs the above-mentioned drilling operation to form a filling channel, and the filling slurry is injected through the filling channel.

[0051] In one embodiment of the present invention, the fully mechanized longwall face filling method for parallel mining and filling operations further includes: S5, after the longwall face advances to the filling hole drilling site, it is transferred to the next filling hole drilling site for operation. When, as in the above embodiment, multiple filling hole drilling sites are arranged in the roadway, such as... Figure 2 and Figure 3 As shown, it includes a first filling hole drilling site 11 and a second filling hole drilling site 12. After the working face advances to the first filling hole drilling site 11, it can be transferred to the second filling hole drilling site 12 for filling operations.

[0052] Based on the above embodiments, the fully mechanized mining face backfilling method for parallel mining and backfilling operations of the present invention has the following beneficial effects:

[0053] The use of horizontal long boreholes (i.e., filling channels) to replace the working face filling pipeline 4 significantly reduced the number of workers and the intensity of labor. The filling operation site was moved from the working face to the filling drilling site, avoiding the impact of filling on coal mining and enabling parallel operations. The horizontal long boreholes were arranged at the top of the working face caving zone, i.e., the filling port 3 was located above the working face, which greatly increased the filling space. The horizontal long boreholes were arranged at the top of the working face fracture zone, realizing the filling of the working face fracture zone and secondary filling of the caving zone, further increasing the filling volume. The horizontal long boreholes were located in the upper and middle part of the working face caving zone, in areas where the goaf was not completely filled. Previous operations provided space for backfilling; horizontal long boreholes were arranged at the top of the caving zone of the working face. As the working face advanced, the roof collapsed, and the horizontal long boreholes were destroyed in sections, enabling the backfilling port 3 to move forward automatically; horizontal long boreholes were arranged at the top of the fracture zone of the working face. As the working face advanced, the roof fractures expanded, forming new horizontal long boreholes, and the backfilling area moved forward accordingly; the horizontal section length of the horizontal long boreholes and the number of backfilling hole drilling sites were designed according to the working face advancement distance, the fluidity of the backfilling material, and the pumping performance, making the design and construction more flexible; the backfilling operation was completely synchronized with the working face advancement, resulting in higher production coordination.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for backfilling a fully mechanized longwall face in which mining and backfilling are carried out in parallel, characterized in that, include: S1. Before the working face is mined, a filling hole drilling site is set up in the roadway at a horizontal distance of more than 500 meters away from the working face. The filling hole drilling site is arranged in one side of the roadway or in both sides of the roadway. S2. Within the top strata, horizontal long boreholes are arranged along the strike of the working face from the filling hole drilling site to form a filling channel, specifically including: S21. Drill inclined holes from the filling hole drilling site to form a slant section for the filling channel; S22. Drill horizontal holes along the working face from the inclined section of the filling channel to form the horizontal section of the filling channel; among which... In the upper middle or top of the caving zone, horizontal long boreholes are arranged along the working face from the filling hole drilling site to form a filling channel for the caving zone. At the top of the fracture zone, horizontal long boreholes are arranged from the filling hole drilling site along the working face to form a filling channel for the fracture zone. S3. The filling material is made into a slurry and transported to the area to be filled through the filling hole drill site and the filling channel; S4. As the working face advances, the roof gradually collapses, and the filling port of the filling channel advances along the construction direction of the working face, while the working face is simultaneously mined and filled, specifically including: As the working face advances, the roof gradually collapses, and the filling channel of the collapse zone is destroyed. The filling port of the filling channel of the collapse zone is advanced along the construction direction of the working face, while the working face mining and collapse zone filling operations are carried out simultaneously. As the working face advances, the fracture zone gradually develops towards the working face, forming new fracture zone filling channels and creating fracture zone filling spaces within the fracture zone. The filling opening of the fracture zone filling channel advances along the construction direction of the working face, while working face back mining and fracture zone filling operations are carried out simultaneously.

2. The filling method for a fully mechanized mining face in parallel mining operations according to claim 1, characterized in that, Step S1 specifically includes: Before the working face is mined, multiple filling hole drilling sites are set up in the roadway far away from the working face.

3. The filling method for a fully mechanized mining face in parallel mining operations according to claim 2, characterized in that, Also includes: S5. After the working face advances to the filling hole drilling site, it will move to the next filling hole drilling site for operation.

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