A collaborative control method for gas and coal spontaneous combustion in a single thick coal seam fully mechanized caving face

Abstract

The invention provides a method for collaborative governance of gas and coal spontaneous combustion of a fully-mechanized caving face with a single thick coal seam. The method is suitable for collaborative governance of gas and coal spontaneous combustion disasters of the fully-mechanized caving face with the spontaneous tendency, the single thick coal seam and large gas emission. Macromolecular air leaking stoppage materials are sprayed to air inlet and return gate roadways of the caving face to form an air leaking stoppage system. In the recovery process, high-order drill holes and grouting holes are alternately formed in the air return gate roadway side, and the high-order drill holes and the grouting holes are kept reasonably spaced to form a gas drainage and grouting system. Monitoring and prewarning systems are established at relevant positions of the caving face, the safety state of the caving face is monitored at any time, and all the systems collaboratively work to achieve the purpose of collaborative governance of the gas and coal spontaneous combustion disasters of the fully-mechanized caving face with the single thick coal seam. The method for collaborative governance of gas and coal spontaneous combustion of the fully-mechanized caving face with the single thick coal seam is scientific, effective, simple and easy to carry out, does not delay production, and can guarantee rapid and efficient exploitation of the caving face.

Description

technical field [0001] The invention relates to the field of coupled prevention and control of coal mine gas and coal spontaneous combustion, in particular to a method for synergistic control of gas and coal spontaneous combustion in a single thick coal seam fully mechanized caving face. Background technique [0002] my country's coal output is huge, with a cumulative output of about 3.7 billion tons in 2015. In my country's future "13th Five-Year Plan", coal will still be the main energy source in my country, accounting for more than 50%. my country's coal mining conditions are complex, and various disasters occur frequently, among which the more prominent disasters are gas disasters and coal natural fire disasters. With the increase of mine mining depth and mining intensity, mines are facing the coupling problem of gas disasters and coal spontaneous combustion disasters. The coexistence of gas and coal spontaneous combustion in the working face greatly threatens the safe pr...

AI Technical Summary

Problems solved by technology

Although the focus of the prevention and control of the combined disaster of gas and coal spontaneous combustion in the goaf is to control the spontaneous combustion of coal in the goaf and eliminate the ignition source of gas explosion, the focus of prevention and control is gas, because if the focus is on controlling the spontaneous combustion of coal in the goaf, although the gas in the goaf can be avoided The explosion affected gas control to a certain extent, which may cause gas to flow into the working face and increase the risk of gas explosion at the working face

[0006] Chinese invention patent 201510161958.3 discloses a gas and coal fire collaborative prevention and control technology in goafs with high gas and short-distance coal seams, including the following steps: determine the key areas for gas and coal fire disaster prevention in goafs; , upper, back, air inlet lane, air return lane, and set gas detection points in the middle section of the air return lane; determine the air intake volume; start the slope from the high-level drainage lane of the 301 working face to the third mining return air uphill to open the door; return air in the mine A grouting pumping station is built near the well, and the pipeline enters the goaf through the general return air lane, the return air uphill in the third mining area, and the return air flow of the 301 working face, forming a grouting fire prevention system; a series of emergency prevention and control technical measures have been established. The invention realizes the safe and efficient production of the 301 fully mechanized mining face. However, this plan is aimed at the problem of safe mining in layers under the short-distance coal seam. The comprehensive factors such as air leakage between the upper and lower coal seams and the recovery of this working face lead to disasters, and the plan is not suitable. The thickness of the coal seam is large, generally more than 6.0 m, even up to 10 m; the buried depth is large, reaching more than -900 m; there is no goaf around or the upper and lower layers of the coal seam have not been mined, and the disasters caused by the mining of the coal seam itself

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