Underground gasification control method

Abstract

The invention provides an underground gasification control method. The underground gasification control method comprises the steps that the environment parameters are obtained; the environment parameters are substituted into a pre-established mathematic model, and first analog data information is worked out; correction parameters are obtained according to the first analog data information and actual data information; and the height of a combustion area is worked out according to the correction parameters, and the technological parameters of underground gasification are adjusted under the condition that the height of the combustion area exceeds a preset threshold value. According to the underground gasification control method, the environment parameters are calculated through the mathematic model, so that the required actual operation numerical value information is obtained, and accordingly the accuracy of detection of the underground gasification operation condition is improved; and meanwhile, the underground gasification operation process can be effectively predicted and controlled, and the optimal and most stable underground gasification state is obtained.

Description

technical field [0001] The invention relates to the field of mineral gasification, in particular to a method for controlling underground gasification. Background technique [0002] After years of development, the wellless underground gasification technology has achieved a series of achievements. However, it still has some disadvantages, such as: gasification efficiency and control methods still have many things worth exploring. [0003] For wellless underground gasification, due to the invisibility of the whole process, the means of controlling gasification are relatively limited. Usually, the gas production and composition of the gas well are detected to adjust the intake air volume and the intake air composition ratio. This kind of control method belongs to ex post control, its disadvantage is that it is relatively passive, the control cycle is long, and it often cannot achieve the expected results; the effectiveness of the control method is often proportional to the monit...

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Problems solved by technology

[0007] The disadvantages of CN201410733959.6 and CN201310615838.7 are that these controls require a large number of experimental devices, the cost of drilling wells and measuring radon is high, and the processing speed of the obtained information is relatively slow, which easily causes delays in the feedback mechanism and reduces the cost of controlling gasification. Effect

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