Long-distance ventilation structure for driving working face of central air return main roadway of coal mine

Abstract

The utility model relates to the technical field of coal mining production, in particular to a long-distance ventilation structure for a driving working face of a central air return main roadway of a coal mine, and aims to solve the problem that the head-on air volume is not sufficient at the early stage of working face driving due to nonstandard vertical connection of an air duct when central roadway exhausting is performed in the coal mining process at present. And finally, the problems of high gas concentration of a coal mining working face and poorer safety of mining operation are easily caused. According to the ventilation structure, the hanging steel wire rope is arranged in the main roadway of the air return shaft to hang the main roadway air duct straightly, so that the phenomenon of dead folding of the air duct is effectively avoided, the straightness in the air duct is ensured, the local resistance of the air duct is greatly reduced, and the air exhaust efficiency is improved; and then the working face air duct of the driving working face is arranged at the position in the same direction as the main roadway air duct, so that the phenomenon of overlarge air duct resistance caused by vertical air exhaust of the air duct is effectively avoided, the effective air volume of the driving working face is greatly improved, and the safety and high efficiency of mining production are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining production, in particular to a long-distance ventilation structure for a central return air lane excavation working face in a coal mine. Background Art

[0002] During the construction of the mine project, the mine failed to implement a full-pressure ventilation system because the main fans were not used for ventilation. The excavation working faces of multiple shafts maintained independent ventilation systems, and each shaft used local ground fans for air supply. However, as the development tunnels continued to extend, the working faces were farther and farther away from the air supply equipment. The installation position of the air supply equipment and the resistance of the wind pipes could easily restrict the effective air volume of the mining working face, resulting in safety risks for workers caused by excessive gas concentration on the working face. Utility Model Content

[0003] The utility model provides a long-distance ventilation structure for a central return air lane excavation working face in a coal mine, so as to solve the problems existing in the above background.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A long-distance ventilation structure for the excavation working face of a central return air tunnel of a coal mine comprises a return air shaft tunnel, an excavation working face is arranged on the upwind side of the return air shaft tunnel, a wellhead is arranged between the excavation working face and the return air shaft tunnel, a tunnel air duct is fixedly arranged in parallel on the top side of the return air shaft tunnel, a working face air duct is fixedly arranged in parallel in the excavation working face opposite the tunnel air duct, and a local ventilator is connected to the working face air duct.

[0006] Furthermore, a hanging wire rope is fixed parallel to the top side of the return air shaft main tunnel, and a plurality of hanging rings are evenly fixed on the hanging wire rope, and the bottom of the hanging rings are connected to a connecting rope, and the main tunnel wind duct is hung in the return air shaft main tunnel through the connecting rope.

[0007] The utility model has the following beneficial effects:

[0008] The utility model provides a long-distance ventilation structure for the excavation working face of the central return air lane of a coal mine. By arranging a hanging wire rope in the return air shaft lane to suspend the lane wind duct straight, the wind duct is effectively avoided from being bent, the straightness inside the wind duct is ensured, and the local resistance of the wind duct is greatly reduced, thereby improving the exhaust efficiency; the working face wind duct of the excavation working face is then installed in the same direction as the lane wind duct, thereby effectively avoiding the phenomenon of excessive wind duct resistance caused by vertical exhaust of the wind duct, greatly improving the effective air volume of the excavation working face, and ensuring the safety and efficiency of mining production. The utility model solves the current problem of insufficient headwind volume in the early stage of working face excavation due to the irregular vertical connection of the wind duct during central lane exhaust in the coal mine mining process, which ultimately easily leads to high gas concentration in the coal mine mining working face and poor mining operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0010] The meanings of the reference numerals are as follows:

[0011] 1. Return air shaft tunnel; 2. Excavation working face; 3. Wellhead; 4. Hanging wire rope; 5. Hanging ring; 6. Connecting rope; 7. Main tunnel air duct; 8. Working face air duct; 9. Local ventilation fan. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] like Figure 1 As shown, a long-distance ventilation structure for the excavation working face of the central return air tunnel of a coal mine comprises a return air shaft tunnel 1, an excavation working face 2 is provided on the upwind side of the return air shaft tunnel 1, a wellhead 3 is provided between the excavation working face 2 and the return air shaft tunnel 1, a tunnel air duct 7 is fixedly provided in parallel with the top side of the return air shaft tunnel 1, a working face air duct 8 is fixedly provided in parallel with the excavation working face 2 opposite the tunnel air duct 7, and a local ventilator 9 is connected to the working face air duct 8.

[0014] A hanging wire rope 4 is fixed parallel to the top side of the return air shaft main tunnel 1, and a plurality of hanging rings 5 are evenly fixed on the hanging wire rope 4. The bottom of the hanging rings 5 are connected to a connecting rope 6, and the main tunnel wind duct 7 is hung in the return air shaft main tunnel 1 through the connecting rope 6.

[0015] The utility model is specifically applied in that a hanging steel wire rope 4 is set in the return air shaft main lane 1 to suspend the main lane wind duct 7 straightly, effectively avoiding the phenomenon of dead bending of the main lane wind duct 7, ensuring the straightness of the main lane wind duct 7, thereby greatly reducing the local resistance of the main lane wind duct 7 exhaust, and improving the exhaust efficiency; then the working face wind duct 8 of the excavation working face 2 is installed in the same direction as the main lane wind duct 7, thereby effectively avoiding the phenomenon of excessive resistance of the working face wind duct 8 caused by vertical exhaust of the working face wind duct 8, greatly improving the effective air volume of the excavation working face 2, ensuring the safety and efficiency of mining production, and solving the current problem of insufficient headwind volume in the early stage of the excavation working face 2 due to the irregular vertical connection of the working face wind duct 8 during central lane exhaust in the coal mine construction and mining process, which ultimately easily causes the problem of high gas concentration in the coal mine excavation working face 2 and poor mining operation safety. Therefore, the ventilation structure has good practicality.

Claims

1. A long-distance ventilation structure for a central return air tunnel of a coal mine, comprising a return air shaft tunnel (1), an excavation working face (2) provided on the upwind side of the return air shaft tunnel (1), and a wellhead (3) provided between the excavation working face (2) and the return air shaft tunnel (1), characterized in that: A main tunnel wind duct (7) is fixedly provided in parallel to the top side of the return air shaft main tunnel (1), and a working surface wind duct (8) is fixedly provided in parallel in the excavation working surface (2) directly opposite the main tunnel wind duct (7), and the working surface wind duct (8) is connected to a local ventilator (9).

2. The remote ventilation structure for the central return air tunnel excavation working face of a coal mine according to claim 1 is characterized by: A hanging steel wire rope (4) is fixedly provided in parallel on the top side of the return air shaft main tunnel (1), a plurality of hanging rings (5) are evenly distributed and fixed on the hanging steel wire rope (4), the bottoms of the hanging rings (5) are all connected to connecting ropes (6), and the main tunnel wind duct (7) is hung in the return air shaft main tunnel (1) through the connecting ropes (6).

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