Safe and reasonable ventilation continuous mining and continuous filling mining system and method

Abstract

The invention belongs to the technical field of filling mining, and provides a safe and reasonable ventilation continuous mining and continuous filling mining system and method.The safe and reasonable ventilation continuous mining and continuous filling mining system comprises a coal conveying crossheading, a filling crossheading and an open-off cut, the two ends of the open-off cut communicate with one end of the coal conveying crossheading and one end of the filling crossheading correspondingly, air enters the coal conveying crossheading and the filling crossheading, and the coal conveying crossheading, the filling crossheading and the open-off cut form a first filling working face; one end of the air return crossheading is communicated with the cutting hole, a second filling working face is formed between the air return crossheading and the filling crossheading, and the first filling working face and the second filling working face are mined in sequence; and the two ends of the air return duct communicate with the coal conveying gate road and the air return gate road correspondingly, and the air return duct divides the first filling working face and the second filling working face into two sets of mining units. While safe and reasonable ventilation is realized, two fully-mechanized excavating machines can be arranged in the working face for simultaneous construction, so that the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of filling mining, and in particular relates to a continuous mining and filling mining system and method with safe and reasonable ventilation. Background Art

[0002] Continuous mining and filling is a new filling technology that has developed and matured in recent years. This technology can effectively control the movement of roof and overlying rock strata, prevent surface subsidence, and protect surface and groundwater resources; it can effectively reduce the intensity of mine pressure, effectively prevent roof and water inrush accidents; eliminate the risk of gas accumulation and spontaneous combustion of floating coal in goaf areas, and improve safety assurance capabilities; it can digest a large amount of coal gangue, reduce the accumulation of ground gangue mountains, and eliminate pollution to the ecological environment; it can achieve "three down and one up" coal mining, replace underground coal pillars, and extend the service life of the mine. This technical equipment system is reliable, practical, easy to operate, and can be applied to all production mines.

[0003] However, this technology is restricted by ventilation conditions and other factors, resulting in low output, which affects its wider promotion and application. Summary of the invention

[0004] The purpose of the present invention is to provide a continuous mining and filling system and method with safe and reasonable ventilation to solve the above-mentioned problems, achieve safe and reasonable ventilation, and realize the arrangement of two multi-machine excavators in the working face for simultaneous construction, thereby improving production efficiency.

[0005] To achieve the above object, the present invention provides the following solution: a safe and reasonable ventilation continuous mining and filling mining system, comprising:

[0006] A coal conveying chute, a filling chute and a cut-out, wherein two ends of the cut-out are respectively connected with one end of the coal conveying chute and the filling chute, the coal conveying chute and the filling chute are air-intaked, and the coal conveying chute, the filling chute and the cut-out form a first filling working face;

[0007] A return air chute, one end of which is connected to the cut-off eye, the return air chute is used for returning air, a second filling working face is formed between the return air chute and the filling chute, and the first filling working face and the second filling working face are mined in sequence;

[0008] A return air duct, both ends of which are respectively connected to the side walls of the coal transport chute and the side walls of the return air chute, and the return air duct divides the first filling working face and the second filling working face into two groups of mining units.

[0009] Preferably, the end of the coal transport chute away from the cutting eye is connected to the mining area transport lane, the end of the filling chute away from the cutting eye is connected to the mining area auxiliary transport lane, and the end of the return air chute away from the cutting eye is connected to the mining area return air lane.

[0010] Preferably, the return air duct and the filling chute are overlapped by an air bridge, and the exhaust air generated by the mining unit enters the return air duct through the air bridge.

[0011] Preferably, a wind barrier is provided between the return air duct and the downstream mining unit, and the wind barrier is used to prevent the exhaust air generated in the mining unit from entering the downstream mining unit.

[0012] Preferably, local ventilators are respectively provided on one side of the coal transport chute close to the mining area transport lane and on one side of the filling chute close to the mining area auxiliary transport lane.

[0013] A safe and reasonable ventilation continuous mining and filling mining method, the mining steps include:

[0014] A return air duct is arranged in the first filling working face, so that the return air duct divides the first filling working face into two groups of mining units, and two groups of multi-purpose excavators are arranged in the coal conveying chute, and the two multi-purpose excavators are operated simultaneously to mine the two groups of mining units;

[0015] Several mining units operate in parallel by digging one branch tunnel while filling another branch tunnel;

[0016] When a multi-purpose tunneling machine is constructing branch tunnels in a mining unit, local ventilators are used for ventilation before the branch tunnels are excavated through and filled with drifts. After the branch tunnels are excavated through, full negative pressure ventilation is used.

[0017] Preferably, after the mining of the first filling working face is completed, the return air chute is used as the filling chute of the second filling working face, and there is no need to excavate more tunnels.

[0018] Preferably, each branch tunnel is excavated and mined using a fully-mechanized tunneling machine or a continuous mining machine, and branch tunnels are provided at intervals in the branch tunnel to support the roof.

[0019] Compared with the prior art, the present invention has the following advantages and technical effects:

[0020] 1. Set up a return air duct in the filling working face to divide the filling working face into two independent ventilation units. Under the premise of sharing a set of transportation system and a set of filling system, two tunneling machines can be operated simultaneously, which improves production efficiency and solves the problem of low output and difficulty in promotion of continuous mining and filling.

[0021] 2. Since the coal transport chute and the filling chute are both in the air intake state, that is, the upper and lower tunnels of the excavation working face are both in the air intake flow, which effectively improves the working environment.

[0022] 3. Since the gas in the goaf can flow into the return air chute, the hidden danger of excessive gas in the upper corner of the mining working face is solved.

[0023] 4. The backfill mining method has its own function of leaving lanes along the goaf, which can improve the recovery rate of the mining area and reduce the excavation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 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.

[0025] Figure 1 It is a schematic diagram of the working face and tunnel arrangement of the present invention;

[0026] Figure 2 This is a schematic diagram of the cross-section layout of the return air duct;

[0027] Figure 3 It is a schematic diagram of the cut-eye section layout;

[0028] Figure 4 This is a schematic diagram of the tunnel layout when mining the second filling surface according to the present invention;

[0029] Among them, 1. Return air tunnel in mining area; 2. Transport tunnel in mining area; 3. Auxiliary transport tunnel in mining area; 4. Coal transport chute; 5. Filling chute; 6. Cutting eye; 7. Return air chute; 8. Return air duct; 9. First filling working face; 10. First mining unit; 11. Second mining unit; 12. Second filling working face; 13. Local ventilator. DETAILED DESCRIPTION

[0030] 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.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Embodiment 1:

[0033] Reference Figure 1-Figure 3 The present invention provides a safe and reasonable ventilation continuous mining and filling mining system, comprising:

[0034] The coal conveying chute 4, the filling chute 5 and the cut-out 6, the two ends of the cut-out 6 are respectively connected with one end of the coal conveying chute 4 and the filling chute 5, the coal conveying chute 4 and the filling chute 5 are air-intaken, and the coal conveying chute 4, the filling chute 5 and the cut-out 6 form a first filling working face 9;

[0035] A return air chute 7, one end of which is connected to the cut-off eye 6, and the return air chute 7 is used for returning air, and a second filling working face 12 is formed between the return air chute 7 and the filling chute 5, and the first filling working face 9 and the second filling working face 12 are mined in sequence;

[0036] The return air duct 8 has two ends which are respectively connected to the side walls of the coal transport chute 4 and the side walls of the return air chute 7. The return air duct 8 divides the first filling working face 9 and the second filling working face 12 into two groups of mining units.

[0037] The main function of the return air chute 7 is to lead out the exhaust air generated during the mining process of each mining unit. The return air chute 7 returns air, and the coal transport chute 4 and the filling chute 5 are both air intakes, and form an E-type ventilation mode with the cut-eye 6; the main function of the return air duct 8 is to divide the first filling working face 9 and the second filling working face 12 into independent ventilation units, so that each mining unit forms an independent ventilation system. On the whole, the present invention can divide the filling working face into two independent ventilation units, so that the two comprehensive excavation machines form their own independent ventilation systems, and on the premise of sharing a set of transportation system and filling system, improve production efficiency, thereby solving the problem of low output and difficulty in promotion of continuous mining and filling; at the same time, the upper and lower lanes of the working face can be placed in the air intake flow, which improves the working environment and solves the hidden danger of excessive gas in the upper corner of the mining working face.

[0038] To further optimize the plan, the end of the coal transport chute 4 away from the cutting eye 6 is connected to the mining area transport tunnel 2, the end of the filling chute 5 away from the cutting eye 6 is connected to the mining area auxiliary transport tunnel 3, and the end of the return air chute 7 away from the cutting eye 6 is connected to the mining area return air tunnel 1.

[0039] like Figure 1 As shown, the mining area return air tunnel 1, the mining area transport tunnel 2, and the mining area auxiliary transport tunnel 3 together constitute the mining area's raw coal transportation, material (including filling material) transportation, pedestrians, and air intake and return production systems.

[0040] To further optimize the solution, an air bridge is used to overlap the return air duct 8 and the filling drift 5, and the exhaust air generated by the mining unit enters the return air duct 8 through the air bridge.

[0041] like Figure 1As shown, taking an example where a return air duct 8 divides the first filling working face 9 into a first mining unit 10 and a second mining unit 11, the exhaust air generated by the excavation of the tunnel boring machine in the first mining unit 10 enters the return air chute 7 through the wind bridge to ensure that it will not enter the filling chute 5, thereby avoiding the mining work of the first mining unit 10 from affecting the ventilation of the second mining unit.

[0042] As a further optimization scheme, a wind barrier is provided between a return air duct 8 and a downstream mining unit, and the wind barrier is used to prevent the exhaust air generated in the mining unit from entering the downstream mining unit.

[0043] By adopting wind barrier isolation, the exhausted air generated by the excavation of the first multi-purpose tunneling machine will not enter the construction area of ​​the second multi-purpose tunneling machine, thus realizing independent ventilation of the two mining units.

[0044] To further optimize the solution, local ventilators 13 are respectively provided on one side of the coal transport chute 4 close to the mining area transport tunnel 2 and on one side of the filling chute 5 close to the mining area auxiliary transport tunnel 3.

[0045] The local fans 13 are all installed in the fresh air flow of the working face close to the mining area transport lane or the mining area auxiliary transport lane.

[0046] A safe and reasonable ventilation continuous mining and filling mining method, the mining steps include:

[0047] During actual mining, the first filling working face 9 and the second filling working face 12 are produced successively, and the two working faces are not allowed to produce at the same time. Specifically,

[0048] A return air duct 8 is arranged in the first filling working face 9, so that the return air duct 8 divides the first filling working face 9 into two groups of mining units, and two fully-mechanized excavators are arranged in the coal conveying chute 4, and the two fully-mechanized excavators are operated simultaneously to mine the two groups of mining units;

[0049] As Figure 1 Taking the structure shown as an example, two fully automatic excavators are arranged at a reasonable interval in the coal conveying chute 4 to work simultaneously. The first fully automatic excavator works in the first mining unit 10, and the second fully automatic excavator works in the second mining unit 11.

[0050] In the middle of the filling working face, between the two multi-purpose excavators, an air return duct 8 is dug so that the two multi-purpose excavators form their own independent ventilation systems.

[0051] The fresh air flow can flow through the upper and lower tunnels of the working faces of the first mining unit 10 and the second mining unit 11 through the coal transport chute 4 and the filling chute 5, and the exhaust air generated during the excavation of the first mining unit 10 can enter the return air chute 7 through the wind bridge and the return air duct 8. At the same time, the exhaust air generated during the excavation of the second mining unit 11 enters the return air chute 7 through the cut eye 6, and finally the generated exhaust air is discharged through the return air tunnel 1 of the mining area.

[0052] Several mining units operate in parallel by digging one branch tunnel while filling another branch tunnel;

[0053] After excavation of any branch tunnel is completed, the branch tunnel will be blocked and filled to ensure that the filling body is used to protect the remaining branch tunnel and the filling body reaches the strength requirement.

[0054] The present invention adopts a jumping backward mining method, that is, the odd-numbered branch lanes are first mined from the cut eye 6 and the return air duct 8 from the inside to the outside, that is, the odd-numbered branch lanes are mined in sequence from the cut eye 6 and the return air duct 8 from the inside to the outside in the order of ①③⑤... branch lanes, and the even-numbered branch lanes are left. After the mined odd-numbered branch lanes are filled and the filling body is stable, the even-numbered branch lanes are mined from the inside to the outside, that is, the even-numbered branch lanes are mined from the cut eye 6 and the return air duct 8 from the inside to the outside in the order of ②④⑥... branch lanes. Until the mining and filling of the entire working face is completed, all coal resources are recovered.

[0055] During the construction of branch tunnels by the tunnel boring machine in the mining unit, before the branch tunnels are excavated through and filled with the drift 5, local ventilators 13 are used for ventilation. After the branch tunnels are excavated through, full negative pressure ventilation is used.

[0056] To further optimize the solution, after the first filling working face 9 is mined, the return air chute 7 is used as the filling chute 5 of the second filling working face 12, and no additional tunnels need to be excavated.

[0057] like Figure 1 As shown, when mining the second filling working face 12, the return air chute 7 used when mining the first filling working face 9 is now used as the filling chute 5, the filling chute 5 is now used as the coal transport chute 4, and the coal transport chute 4 is now used as the return air chute 7. There is no need to dig tunnels again before construction can be carried out. While ensuring ventilation effect and mining efficiency, the mining cost is further reduced.

[0058] To further optimize the plan, each branch tunnel is excavated and mined with a fully-mechanized tunneling machine or a continuous mining machine, and branch tunnels are left at intervals in the branch tunnel to support the roof.

[0059] The one-step optimization plan uses backfill to protect the branch tunnels left, and conducts secondary mining after the backfill reaches the strength requirements, until the entire working face is mined and backfilled, realizing full recovery of coal resources.

[0060] Embodiment 2:

[0061] like Figure 4 As shown, the first filling working face 9, the second filling working face 12 and so on are analogous. When the second filling working face 12 is mined, the third filling working face is excavated in advance to provide a dedicated return air duct 8 for the second filling working face 12.

[0062] The above process is repeated in sequence, thereby realizing mining in the direction of the auxiliary transport tunnel 3 of the mining area.

[0063] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0064] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A safe and reasonable ventilation continuous mining and filling system, characterized in that: include: A coal conveying chute (4), a filling chute (5) and a cutout (6), the two ends of the cutout (6) are respectively connected to one end of the coal conveying chute (4) and the filling chute (5), the coal conveying chute (4) and the filling chute (5) are air-intaken, and the coal conveying chute (4), the filling chute (5) and the cutout (6) form a first filling working surface (9); A return air chute (7), one end of which is in communication with the cut hole (6), the return air chute (7) is used for returning air, a second filling working face (12) is formed between the return air chute (7) and the filling chute (5), and the first filling working face (9) and the second filling working face (12) are mined in sequence; A return air duct (8), the two ends of which are respectively connected to the coal transport chute (4) and the return air chute (7); the return air duct (8) divides the first filling working face (9) and the second filling working face (12) into two groups of mining units.

2. A safe and reasonable ventilation continuous mining and filling system according to claim 1, characterized in that: The end of the coal transport chute (4) away from the cut-eye (6) is connected to the mining area transport lane (2), the end of the filling chute (5) away from the cut-eye (6) is connected to the mining area auxiliary transport lane (3), and the end of the return air chute (7) away from the cut-eye (6) is connected to the mining area return air lane (1).

3. A safe and reasonable ventilation continuous mining and filling system according to claim 2, characterized in that: The return air duct (8) and the filling chute (5) are overlapped by an air bridge, and the exhaust air generated by the mining unit enters the return air duct (8) through the air bridge.

4. A safe and reasonable ventilation continuous mining and filling system according to claim 3, characterized in that: A wind barrier is provided between the return air duct (8) and the downstream mining unit, and the wind barrier is used to prevent the exhaust air generated in the mining unit from entering the downstream mining unit.

5. A safe and reasonable ventilation continuous mining and filling system according to claim 4, characterized in that: Local ventilators (13) are respectively arranged on one side of the coal transport chute (4) close to the mining area transport tunnel (2) and on one side of the filling chute (5) close to the mining area auxiliary transport tunnel (3).

6. A safe and reasonable ventilation continuous mining and continuous filling mining method, based on a safe and reasonable ventilation continuous mining and continuous filling mining system according to claim 5, characterized in that: The mining steps include: A return air duct (8) is arranged in the first filling working face (9), so that the return air duct (8) divides the first filling working face (9) into two groups of mining units, and two fully automatic excavators are arranged in the coal conveying chute (4), and the two fully automatic excavators are operated simultaneously to mine the two groups of mining units; In the mining unit, one branch tunnel is excavated and another branch tunnel is filled in parallel; During the construction of the branch tunnel by the tunnel boring machine in the mining unit, before the branch tunnel is excavated through and the filling trench (5) is filled, a local ventilator (13) is used for ventilation. After the branch tunnel is excavated through, full negative pressure ventilation is used.

7. A safe and reasonable ventilation continuous mining and filling method according to claim 6, characterized in that: After the first filling working face (9) is mined, the return air chute (7) is used as the filling chute (5) of the second filling working face (12), and no additional tunnels need to be excavated.

8. A safe and reasonable ventilation continuous mining and filling method according to claim 6, characterized in that: Each branch tunnel is excavated and mined by a fully-mechanized tunneling machine or a continuous mining machine, and branch tunnels are left at intervals in the branch tunnel to support the roof.

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