A Ventilation Method for Mining Coal Seams Prone to Spontaneous Combustion
A technology of coal mining face and ventilation method, which is applied in mine/tunnel ventilation, mining equipment, earth-moving drilling, etc., can solve the problems of unstable roadway dynamic pressure of return air system, long return air line, and difficult maintenance. , to achieve the effect of shortening the retraction period, reducing the difficulty of fire prevention, and simple return air lines
Inactive Publication Date: 2017-02-01
CHANGCUN COAL MINE OF HENAN DAYOU ENERGY
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Problems solved by technology
[0003] In view of the above situation, in order to solve the defects of the prior art, the purpose of the present invention is to provide a ventilation method for the coal seam mining prone to spontaneous combustion, which can effectively solve the problem that the roadway is affected by the recovery dynamic pressure caused by the instability of the existing return air system. The deformation is serious, maintenance is very difficult, and the return air line is also long
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[0008] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.
[0009] Depend on figure 1 Given, the present invention comprises the following steps:
[0010] 1) First, excavate a waist roadway parallel to the cutting hole outside the design stop line of the working face, and the waist roadway is arranged 40-60 meters away from the design stop line of the working face;
[0011] 2) Excavate a 10-20m upper return air connection roadway in the waist roadway near the side opening of the return air roadway in the mining area. After the upper return air connection roadway is excavated in place, excavate the return air dark shaft downward to the return air roadway in the mining area After the same level, excavate the lower return airway and the mining area return airway to connect, so that the upper return airway, the return air shaft, the lower return airway and the mining area return air...
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The invention relates to a ventilation method for use during mining of an easily spontaneous combustion coal seam face, and aims to effectively solve the problems of severe deformation, great difficulty in maintenance and long air-returning path due to the influence of stopping dynamic pressure on a roadway caused by instability of the conventional air-returning system. According to the technical scheme, the ventilation method comprises the following steps: (1) tunneling a waist lane; (2) tunneling a face air-returning lane; (3) tunneling a face roadway; (4) building a ventilation facility; (5) normally ventilating of the face; (6) forming a ventilation route on the face; (7) returning air locally on the face; (8) forming a local air returning route; (9) retracting a top plate and forming anti-fire boreholes. Through the design of a blind shaft, the method has the characteristics of simple air returning circuit and stable ventilation system; maintenance is not required basically; the anti-fire boreholes are formed, so that the fire-resistance difficulty at the retracting period of the face is lowered, and the retracting working period of the face is shortened; the ventilation method is an innovation in the aspect of ventilation methods for the easily spontaneous combustion coal seam face.
Description
technical field [0001] The invention relates to the field of safe production in coal mines, in particular to a ventilation method for mining a coal seam prone to spontaneous combustion. Background technique [0002] According to the "Mine Fire Prevention and Extinguishing Code", the mining area or working face with severe spontaneous combustion fires should consider the establishment of a local ventilation system. The layout of coal seams prone to spontaneous combustion should give priority to a perfect local ventilation system. Because the upper and lower lanes of the coal mining face are all arranged in the coal seam, the return air system is composed of the return air up (down) hill, the return air connection lane, or the connection of the wind bridge and the special return air lane. The return air inclined roadway, the return air connecting roadway or the wind bridge are all arranged in the coal seam. These roadways are greatly affected by the mine pressure, the deformat...
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IPC IPC(8): E21F1/00
CPCE21F1/006E21F1/10
Inventor 杜青炎张银亮王平陈国辉
Owner CHANGCUN COAL MINE OF HENAN DAYOU ENERGY