A coal mining face air inlet and return structure
By optimizing the air supply and return structure of the coal mining face, the problems of toxic gases and dust in the design of traditional underground coal mine return tunnels have been solved, ventilation of the mining face and fresh air flow have been achieved quickly, and the health risks of employees have been reduced.
Patent Information
- Application Number
- CN202211193130.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-09-28
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2042-09-28
AI Technical Summary
In the design of traditional underground coal mine mining tunnels, the long return air path leads to a lot of toxic gases and dust, which affects the health of workers. In addition, the tunnel construction is restricted during excavation and is prone to disrepair.
A new air intake and return structure for the coal mining face is adopted, including return air lane, transport lane, cutting eye, coal loading group return air uphill and other components. Through simultaneous forward excavation and reverse excavation, a mining face is formed to ensure that fresh air flows in the transport lane and return air lane, reducing contact with toxic gases and dust.
It has achieved the rapid formation of mining faces, reduced idle tunnels, lowered the risk of workers suffering from silicosis, and improved the safety of the working environment.
Smart Images
Figure CN115522968B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of mining, and in particular to an air inlet and return structure for a coal mining working face. Background Art
[0002] The design of the traditional underground coal mine roadway is based on Figure 2 During the mining face recovery, a return air lane 1' is connected to the mine's dedicated return air system, a transport lane 2' is connected to the mine's main air intake system, and the cut eye 3' is connected to the transport lane 2' and the return air lane 1' to form a mining face, and then different mining processes are used to recover coal resources. The toxic and harmful gases in the mining face are then discharged to the professional return air system through the return air lane and finally discharged to the ground. The path of fresh air circulation in this structure is the total length of the transport lane, cut eye and return air lane. The farther the location is from the air intake system, the more toxic gases and dust generating areas it passes through, and the more toxic gases and dust are in the air, which greatly harms the health of the workers in the return air lane. In addition, the existing structure, reference Figure 1 During the excavation period, due to the limitations of the traditional development and extension system, only two excavation heads 4' can be opened during the mining face formation process, one of which is opened on the return air tunnel 1' and the other excavation head is opened on the transport tunnel 2'. If a relatively long working face or an area with high mine pressure is encountered, when the construction of the front tunnel is not in place, the rear tunnel may have been seriously dilapidated. Summary of the Invention
[0003] In order to solve the above shortcomings and deficiencies of the prior art, the purpose of the present invention is to provide a coal mining face air inlet and return structure.
[0004] The technical solution of the present invention is: a coal mining face air supply and return structure, including a return air lane, a transport lane, a cut hole, a coal loading group return air uphill, a coal loading group transport uphill, a first transport stone gate, a third return air joint lane, a second transport stone gate and a fourth return air joint lane;
[0005] The second transport stone gate and the fourth return air connecting tunnel are connected with the return air tunnel in sequence;
[0006] The first transport stone gate and the third return air connecting tunnel are connected to the transport tunnel in sequence;
[0007] The two ends of the cut eye are connected to the return air lane and the transport lane respectively;
[0008] It also includes the first uphill tunnel, the main transport tunnel and the centralized return air tunnel;
[0009] The two ends of the first uphill section are connected to the centralized return air tunnel and the transport main tunnel respectively;
[0010] The end of the centralized return air lane away from the first uphill is connected to the uphill return air of the coal feeding group;
[0011] The end of the transport tunnel away from the first uphill is connected to the uphill transport of the coal loading group, and the transport tunnel is connected to the end of the transport tunnel away from the cutting eye;
[0012] The end of the return air lane away from the fourth return air lane is connected to the first uphill lane;
[0013] The connection point between the cut eye and the return air channel is connected to the first uphill.
[0014] Furthermore, it also includes a second ascent of the mountain;
[0015] The two ends of the second uphill passage are connected to the centralized return air tunnel and the main transport tunnel respectively.
[0016] The beneficial effects of the present invention are as follows: compared with the prior art, during the excavation of the working face, when arranging a relatively long return air tunnel and transport tunnel, the forward excavation and reverse excavation of the return air tunnel can be carried out simultaneously, thereby achieving the purpose of quickly forming a mining face, reducing the long-term idleness of the tunnel and avoiding the situation of secondary tunnel repair in the later stage;
[0017] After the mining face is formed, the return air system of the coal mining face is adjusted to ensure that the airflow in the mining face transport tunnel and the return air tunnel is fresh air, reducing the time and area of workers' exposure to dust and toxic and harmful gases, and greatly reducing the risk of workers suffering from silicosis. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic diagram of the background technology of the present invention during mining;
[0019] Figure 2 A schematic diagram of the background technology of the present invention during tunneling;
[0020] Figure 3 A schematic diagram of the present invention during excavation;
[0021] Figure 4 It is a schematic diagram of the mining period of the present invention. DETAILED DESCRIPTION
[0022] The invention will be further described below with reference to the accompanying drawings and specific embodiments:
[0023] Implementation Example 1:
[0024] In order to solve the problems of the existing technology that the mining face takes a long time to form during excavation, the long working face or the area with high mine pressure easily leads to the disrepair of the tunnel, the long fresh air flow path during mining, and the toxic gas and dust in the return air tunnel, reference is made to the Figure 3 and 4The present invention adopts a coal mining face air inlet and return structure, including a return air lane 1, a transport lane 2, a cutting eye 3, a coal loading group return air uphill 12, a coal loading group transport uphill 11, a first transport stone gate 10, a third return air joint lane 17, a second transport stone gate 14 and a fourth return air joint lane 16; the second transport stone gate 14 and the fourth return air joint lane 16 are connected to the return air lane 1 in sequence; the first transport stone gate 10 and the third return air joint lane 17 are connected to the transport lane 2 in sequence; the two ends of the cutting eye 3 are connected to the return air lane 1 and the transport lane 2 respectively; it also includes a first uphill 6, a transport main lane 8 and a centralized return air lane 7; The two ends of the first uphill 6 are respectively connected to the centralized return air lane 7 and the transport lane 8; the end of the centralized return air lane 7 away from the first uphill 6 is connected to the coal-loading group return air uphill 12 through the first return air connecting lane 13; the end of the transport main lane 8 away from the first uphill 6 is connected to the coal-loading group transport uphill 11, and the transport main lane 8 is connected to the end of the transport lane 2 away from the cutting eye 3 through the sixth return air connecting lane 18; the end of the return air lane 1 away from the fourth return air connecting lane 16 is connected to the first uphill 6 through the second return air connecting lane 15; the connection point between the cutting eye 3 and the return air lane 1 is connected to the first uphill 6 through the second return air connecting lane 15.
[0025] With the above structure:
[0026] During the excavation of the working face, when arranging relatively long return air tunnels and transport tunnels, the forward and reverse excavation of the return air tunnel can be carried out simultaneously to achieve the purpose of quickly forming the mining face, reduce the long-term idleness of the tunnels, and avoid the situation of secondary tunnel repairs in the later stage;
[0027] After the mining face is formed, by adjusting the return air system of the coal mining face, the airflow in the mining face transport tunnel 2 and the return air tunnel 1 is made fresh, reducing the time and area of workers' exposure to dust and toxic and harmful gases, and greatly reducing the risk of workers suffering from silicosis.
[0028] When this embodiment is used, the fresh air at the first heading head 4-2 is blown to the first heading head 4-2 through the second transport stone gate 14 and the gas pipeline in the fourth return air tunnel 16, and the air of the first heading head 4-2 is updated to become exhaust gas. The exhaust gas is then transported to the upper coal group return air uphill 12 through the fourth return air tunnel 16 and the second transport stone gate 14; the fresh air at the second heading head 4-3 is blown to the second heading head 4-3 through the first transport stone gate 10 and the gas pipeline in the third return air tunnel 17, and the air of the second heading head 4-3 is updated. The exhaust gas is then transported to the coal-loading group return air uphill 12 through the main transport tunnel 8, the first uphill 6 and the centralized return air tunnel 7; the fresh air at the third heading head 4-1 is transported to the first uphill 6 through the sixth return air tunnel 19 and the main transport tunnel 8, and then blown to the third heading head 4-1 through the gas pipeline in the second return air tunnel 15, updating the air of the third heading head 4-1 to become exhaust gas, and then the exhaust gas is transported to the coal-loading group return air uphill 12 through the second return air tunnel 15, the first uphill 6 and the centralized return air tunnel 7.
[0029] Implementation Example 2:
[0030] When multiple mining faces need to be built in the mining area, if there is only one first uphill, then after the exhaust gas mixes with the first uphill, the first uphill cannot be used to transport fresh air, making it unsuitable for multiple mining faces.
[0031] In order to solve this problem, in this embodiment, in addition to all the contents in implementation example 1, this embodiment further includes a second uphill on the basis of embodiment 1; the two ends of the second uphill 5 are respectively connected to the centralized return air duct 7 and the transport main duct 8; the end of the return air duct 1 away from the fourth return air connecting duct 16 is connected to the second uphill 5; the connection point between the cut eye 3 and the return air duct 1 is connected to the second uphill 5 through the fifth return air connecting duct 18.
[0032] When in use, if there are multiple mining faces, each mining face can transport the exhaust gas generated by all mining faces through the first uphill, and transport fresh air and waste rock and coal through the second uphill 5. The exhaust gas generated between mining faces will not affect other mining faces, so this method can be used for multiple mining faces.
[0033] During the mining period, refer to Figure 4For the air in return airway 1, fresh air is delivered to return airway 1 through the second transport stone gate 14 and the gas pipeline in the fourth return air joint 16 to refresh the air in return airway 1. Exhaust gas is then delivered to the coal loading group return air uphill 12 through the second return air joint 15, the first uphill 6, and the centralized return airway 7. For the air in transport tunnel 2, fresh air is blown to transport tunnel 2 through the first transport stone gate 10 and the gas pipeline in the third return air joint 17 to refresh the air in transport tunnel 2. Exhaust gas is then delivered to the coal loading group return air uphill 12 through transport tunnel 2, the mining face, the fifth return air joint 18, the second uphill 5, and the centralized return airway 7. This significantly reduces the distance from the upper end of the mining face to the return airway opening, ensuring that the return airway 1 is exposed to fresh air, preventing workers from long-term exposure to toxic and harmful gases and large amounts of dust.
[0034] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.
Claims
1. A coal mining face air supply and return structure, comprising a return air lane (1), a transport lane (2), a cutting hole (3), a coal loading group return air uphill (12), a coal loading group transport uphill (11), a first transport stone gate (10), a third return air joint lane (17), a second transport stone gate (14) and a fourth return air joint lane (16); The second transport stone gate (14) and the fourth return air connecting tunnel (16) are connected to the return air tunnel (1) in sequence; The first transport stone gate (10) and the third return air connecting tunnel (17) are connected to the transport tunnel (2) in sequence; The two ends of the cut hole (3) are connected to the return air lane (1) and the transport lane (2) respectively; It is characterized in that It also includes the first uphill tunnel (6), the main transport tunnel (8) and the centralized return air tunnel (7); The two ends of the first uphill passage (6) are connected to the centralized return air passage (7) and the main transport passage (8) respectively; The concentrated return air lane (7) is connected to the coal-loading group return air uphill (12) at one end away from the first uphill (6); The end of the transport tunnel (8) away from the first uphill (6) is connected to the coal group transport uphill (11), and the transport tunnel (8) is connected to the end of the transport tunnel (2) away from the cut eye (3); The return air lane (1) is connected to the first uphill (6) at one end away from the fourth return air lane (16); The connection point between the cut hole (3) and the return air lane (1) is connected to the first uphill (6); During the mining period, for the air in the return air lane (1), fresh air is transported to the return air lane (1) through the second transport stone gate (14) and the gas pipeline in the fourth return air lane (16) to update the air in the return air lane (1), and then the exhaust gas is transported to the upper coal group return air uphill (12) through the second return air lane (15), the first uphill (6) and the centralized return air lane (7); for the air in the transport lane (2), the exhaust gas is transported to the upper coal group return air uphill (12) through the first transport stone gate (10), the third return air lane (17 ) is blown to the transport tunnel (2) through the gas transmission pipeline in the transport tunnel (2) to renew the air in the transport tunnel (2), and then the waste gas is transported to the return air uphill (12) of the upper coal group through the transport tunnel (2), the mining face, the fifth return air joint tunnel (18), the second uphill (5) and the centralized return air tunnel (7). The connection point between the cutting eye (3) and the return air tunnel (1) is connected to the second uphill (5) through the fifth return air joint tunnel (18), and the two ends of the second uphill (5) are respectively connected to the centralized return air tunnel (7) and the transport tunnel (8); The return air lane (1) is connected to the second uphill (5) at one end away from the fourth return air lane (16); The connection point between the cut eye (3) and the return air lane (1) is connected to the second uphill (5).