A self-moving filling method for high-porosity filling materials of gangue

Abstract

The present invention discloses a self-moving filling method of gangue high-porosity filling material behind a frame, comprising: laying a track and setting a grouting device behind a hydraulic support; after cutting coal on the front working face, moving the frame and pushing the scraper conveyor, push the grouting track, and put gangue particles behind the first hydraulic support; start grouting, and the gangue and slurry are solidified to form a filling body. When the thickness of the newly formed filling body reaches 0.3m, stop grouting and gangue dropping; then move the grouting device to the rear of the next hydraulic support, start the gangue dropping here, and spray the slurry on the gangue, and repeat this cycle until the coal mining and filling operations of the working face are completed. This method is simple, safe and efficient, and can perform self-moving grouting operations behind a frame. While the gangue is dropping, it can freely spray fast-setting materials back and forth. The gangue and the fast-setting materials form a filling body together, and efficient filling and mining are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of efficient filling mining, and in particular to a self-moving filling method behind a gangue high-porosity filling material rack. Background Art

[0002] The proposal of efficient filling mining technology provides a direction for further realizing efficient filling mining. The important content of this technology is to transport the crushed coal gangue to the goaf, and then spray the fast-setting material on the coal gangue. The fast-setting material expands and solidifies rapidly, and forms a high-porosity filling body with the coal gangue, so as to make the filling operation efficient. The design and layout of the shotcrete device are the key to realizing this technology. However, the movement process of the shotcrete machine currently used in coal mines is often cumbersome and the movement range is limited. In addition, when the required shotcrete range is large, multiple shotcrete machines are usually used to coordinate the shotcrete to expand the shotcrete range, resulting in high coal mining costs. Therefore, in order to achieve low-cost, efficient and timely shotcrete and simplify the movement process of the shotcrete device, and at the same time form a practical shotcrete method, a self-moving filling method of high-porosity filling material rack of gangue is urgently needed to effectively solve the problems faced by the realization of efficient filling mining technology. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a self-moving filling method for high-porosity gangue filling materials, which can spray at low cost, efficiently and timely and simplify the movement process of the spraying device.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a method for self-moving filling of high-porosity gangue filling materials, comprising the following steps:

[0006] S1. Lay two rows of fixed shotcrete tracks behind the hydraulic support of the working surface. The shotcrete track 4 is composed of multiple track units;

[0007] S2. A running trolley is arranged on the shotcrete track, a shotcrete device is installed on the running trolley, and the running wheels at the bottom of the running trolley adapted to the shotcrete track are driven by separate motors respectively;

[0008] S3, after the front working face cuts coal, moves the frame and pushes the scraper conveyor, the shotcrete track is pushed in the same moving manner as the scraper conveyor, and coal gangue particles are placed behind the first hydraulic support;

[0009] S4. Debugging according to the spraying discharge situation and setting the spraying pressure parameters of the spraying device;

[0010] S5. While putting coal gangue particles into the goaf, the grouting device sprays fast-setting materials, which are mixed with the coal gangue to form a filling body. The coal gangue and the slurry are solidified to form a filling body. When the newly formed filling body reaches a certain thickness, the grouting and coal gangue dropping are stopped;

[0011] S6. Move the grouting device to the rear of the next hydraulic support, start the gangue dropping here and spray the slurry on the gangue, and repeat this cycle until the coal mining and filling operations on the working face are completed. During this process, the grouting device can be moved to any position on the grouting track for grouting, which can be used for slurry supplementary spraying or other functional requirements.

[0012] Preferably, the track unit includes a track base, a track connection component for connecting the hydraulic support is provided in the middle of the track base, a groove is provided at the upper end of the track base and a rack is embedded therein, and the rack is made of elastic plastic and can be bent. Two adjacent track units are hinged and can achieve a minimum horizontal steering angle of 10°.

[0013] Preferably, in step S3, the hydraulic support controls the movement of the track unit, and synchronously moves the scraper conveyor and the shotcrete track after the coal is cut.

[0014] Preferably, the two shotcrete tracks are connected together by a plurality of parallel connecting rods, and at least a plurality of parallel connecting rods are arranged between the two track units arranged side by side.

[0015] Preferably, connecting rings are provided at both ends of the track unit, and two adjacent track units are hingedly connected via the connecting rings.

[0016] Preferably, the running wheels at the bottom of the running trolley are equipped with steering wheel housings for protecting them.

[0017] Preferably, in step S5, when the thickness of the newly formed filling body reaches 0.3 m, the grouting and gangue dropping are stopped.

[0018] The beneficial effects of the present invention are:

[0019] 1. A flexible and movable shotcrete track is set behind the hydraulic support, and a matching shotcrete device is designed to realize the self-movement of the shotcrete device. The reciprocating movement of a single shotcrete device can meet the large-scale shotcrete needs in time, solving the problem of shotcrete machine layout and transfer.

[0020] 2. The movement of the shotcrete track can be the same as the moving process of the scraper conveyor, which can make the shotcrete track move with the advancement of the working face, and the moving process is simple and easy to operate. At the same time, the number of shotcrete devices is greatly reduced, the cost of coal mining is reduced, and the mine yield is improved.

[0021] 3. In addition, the shotcrete device and the shotcrete track move by means of gear meshing, which is conducive to adapting to different working surface slopes and avoiding the problems of ordinary track slides. The entire device has a simple structure, is safe and efficient, can meet the functional requirements of efficient filling mining technology, and has wide practicality in this technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a shotcrete device provided in an embodiment of the present invention moving along a shotcrete track;

[0024] Figure 2 A schematic diagram of the structure of a track unit provided in an embodiment of the present invention;

[0025] Figure 3 A schematic structural diagram of a running trolley provided in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1-coal seam, 2-hydraulic support, 3-filling body, 4-grouting track, 5-coal mining machine, 6-rapid bonding material, 7-grouting moving device, 8-scraper conveyor, 10-rack rail, 12-parallel connecting rod, 13-track base, 15-connecting ring, 16-grouting device, 17-steering wheel housing, 18-traveling trolley, 20-moving wheel, 21-track connecting parts. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0029] like Figures 1 to 3 As shown, a method for self-moving filling of high-porosity filling materials with gangue belongs to the field of coal mine filling and mining technology. The grouting device 16 cooperates with the hydraulic support 2 to complete the filling operation of the rear goaf while mining the coal seam 1 in the front coal seam; the method includes the following steps:

[0030] S1. Lay two rows of fixed shotcrete tracks 4 behind the hydraulic support 2 of the working surface. The shotcrete tracks 4 are spliced ​​by multiple track units;

[0031] The track unit includes a track base 13, the middle of which is provided with a track connection component 21 for connecting the hydraulic support 2, the upper end of the track base 13 is provided with a groove and embedded with a rack rail 10, the rack rail 10 is made of elastic plastic and can be bent. Two adjacent track units are hinged and can achieve a minimum horizontal steering of 10°.

[0032] The two shotcrete tracks 4 are connected together by a plurality of parallel connecting rods 12 , and at least two parallel connecting rods 12 are arranged between the two track units arranged side by side.

[0033] Both ends of the track unit are provided with connecting rings 15 , and two adjacent track units are hingedly connected via the connecting rings 15 .

[0034] S2, a running trolley 18 is arranged on the shotcrete track 4, a shotcrete device 16 is installed on the running trolley 18, and the running wheels 20 at the bottom of the running trolley 18 adapted to the shotcrete track 4 are driven by separate motors respectively;

[0035] The running wheel 20 at the bottom of the running trolley 18 is adapted with a steering wheel housing 17 for protecting the running trolley 18. The running trolley 18, the spraying device 16, and the spraying track 4 constitute the spraying mobile device 7.

[0036] The spraying device 16 adopts the existing technology, and only needs to meet the spraying function and adjust the spraying angle. The filling device disclosed in the Chinese patent application with publication number CN117090629A, a high-efficiency filling device and method for gangue high-porosity materials, can be selected;

[0037] S3. After the front working face cuts coal, moves the frame and pushes the scraper conveyor 8, the shotcrete track 4 is moved in the same way as the scraper conveyor 8, and coal gangue particles are placed behind the first hydraulic support 2; the hydraulic support 2 controls the movement of the track unit, and synchronously moves the scraper conveyor 8 and the shotcrete track 4 after cutting coal.

[0038] S4, debugging according to the spraying discharge situation, setting the spraying pressure parameters of the spraying device 16;

[0039] S5. While putting gangue particles into the goaf, the rapid bonding material is sprayed by the grouting device 16, mixed with the gangue to form a filling body. The gangue and the slurry are solidified to form a filling body 3. When the newly formed filling body 3 reaches a thickness of 0.3m, the grouting and gangue dropping are stopped; the rapid bonding material is the rapid bonding bonding material disclosed in the preparation method of a gangue fast and efficient bonding high-porosity filling material with publication number CN117263581A;

[0040] The performance characteristics of fast-setting materials are high bonding strength, fast curing speed, and high consolidation strength, that is, the setting time is less than 0.5h.

[0041] S6, move the grouting device 16 to the rear of the next hydraulic support 2, start the gangue dropping here and spray the slurry on the gangue, and repeat this cycle until the coal mining and filling operations of the working face are completed. In this process, the grouting device 16 can be moved to any position of the grouting track 4 for grouting, which can be used for slurry supplementary spraying or other functional requirements.

[0042] This method is simple in design, safe and efficient, and can perform self-moving grouting operations behind the frame. It can freely spray fast-setting materials back and forth while the gangue is falling. The gangue and the fast-setting materials together form a filling body, realizing efficient filling mining.

[0043] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for self-moving filling of high-porosity gangue filling materials behind a rack, characterized in that: The following steps are involved: S1. Laying two rows of fixed shotcrete tracks (4) behind the hydraulic support (2) on the working surface, wherein the shotcrete tracks (4) are formed by splicing a plurality of track units; The track unit comprises a track base (13), a track connection component (21) for connecting to a hydraulic support (2) is provided in the middle of the track base (13), a groove is provided at the upper end of the track base (13) and a rack rail (10) is embedded therein, two adjacent track units are hinged and can achieve horizontal steering within a minimum of 10°, and the rack rail (10) is made of elastic plastic and can be bent; The two shotcrete tracks (4) are connected together via a plurality of parallel connecting rods (12), and at least two parallel connecting rods (12) are arranged between the two track units arranged side by side; S2, arranging a running trolley (18) on the shotcrete track (4), installing a shotcrete device (16) on the running trolley (18), and driving running wheels (20) at the bottom of the running trolley (18) adapted to the shotcrete track (4) respectively using separate motors; S3, after the front working face has cut coal, moved the frame and pushed the scraper conveyor (8), the shotcrete track (4) is pushed in the same moving manner as the scraper conveyor (8), and coal gangue particles are placed behind the first hydraulic support (2); S4, debugging according to the spraying discharge situation, setting the spraying pressure parameters of the spraying device (16); S5. While placing coal gangue particles into the goaf, the grouting device (16) sprays a fast-setting material, which is mixed with the coal gangue to form a filling body. The coal gangue and the slurry are solidified to form a filling body (3). When the newly formed filling body (3) reaches a certain thickness, the grouting and coal gangue dropping are stopped; S6. Move the grouting device (16) to the rear of the next hydraulic support (2), start the gangue dropping at this point and spray the slurry on the gangue, and repeat this cycle until the coal mining and filling operations at the working face are completed.

2. A method for self-moving filling of high-porosity gangue filling materials as claimed in claim 1, characterized in that: In step S3, the hydraulic support (2) controls the movement of the track unit, and synchronously moves the scraper conveyor (8) and the shotcrete track (4) after the coal is cut.

3. A method for self-moving filling of high-porosity gangue filling materials as claimed in claim 2, characterized in that: Connecting rings (15) are provided at both ends of the track unit, and two adjacent track units are hingedly connected via the connecting rings (15).

4. A method for self-moving filling of high-porosity gangue filling materials as claimed in claim 3, characterized in that: The running wheels (20) at the bottom of the running trolley (18) are adapted with a steering wheel housing (17) for protecting the running trolley (18).

5. A method for self-moving filling of high-porosity gangue filling materials as claimed in claim 4, characterized in that: In step S5, when the thickness of the newly formed filling body (3) reaches 0.3 m, the grouting and coal gangue dropping are stopped.

Images