Ventilation method for use during mining of easily spontaneous combustion coal seam face
A technology of coal mining face and ventilation method, which is applied in mine/tunnel ventilation, mining equipment, earthwork drilling and mining, etc., and can solve problems such as return air system unstable roadway return mining dynamic pressure, long return air line, difficult maintenance, etc. , to achieve the effects of shortening the retraction period, reducing the difficulty of fire prevention, and simplifying the return air line
Inactive Publication Date: 2015-05-06
CHANGCUN COAL MINE OF HENAN DAYOU ENERGY
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[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 embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0009] by figure 1 Given, the present invention includes the following steps:
[0010] 1) First, excavate a waist lane parallel to the cut-off cut outside the design stop line of the working face, and the waist lane is arranged 40-60 meters beyond the design stop line of the working face;
[0011] 2) A 10-20m upper return air connection lane is excavated in the waist lane near the side opening of the return air lane in the mining area. After the upper return air connection lane is in place, the return air concealed vertical shaft is driven down to the return air lane in the mining area After the same level, the lower return air connecting lane is connected with the mining area return air lane, so that the upper return air connecting lane, the return air concealed shaft, the lower return air connecting lane and the mining area return air lan...
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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 coal mine safety production, in particular to a ventilation method for mining a coal seam prone to spontaneous combustion. Background technique [0002] According to the "Code for Mine Fire Prevention and Fire Fighting" regarding mining areas or working faces with severe spontaneous combustion, consideration should be given to the establishment of a local anti-wind system. The layout of coal seams prone to spontaneous combustion should give priority to a complete local anti-wind system. Because the upper and lower lanes of the coal mining face are all arranged in the coal seam, the return air system adopts the return air up (down) mountain, the return air connection lane, or the air bridge and the special return air lane are connected. The return air sloping lanes, return air connecting lanes or wind bridges are all arranged in the coal seam. These roadways are greatly affected by mine pressure, severely deformed, an...
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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