Method for measuring goaf gas concentration field by utilizing goaf closed wall extraction data
A gas concentration and goaf technology, which is applied in gas emission, data processing applications, mining equipment, etc., can solve the problems of large deviation of calculation results and complicated operation process, and achieve the effect of ensuring safe production and improving analysis efficiency.
Inactive Publication Date: 2021-02-26
CHINA COAL TECH ENG GRP CHONGQING RES INST
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At present, the existing methods for the gas concentration field in goafs either
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[0016] The present invention is further described below in conjunction with the accompanying drawings of the description, as shown in the figure:
[0017] The method of the present invention for measuring the gas concentration field of the goaf by using the closed wall drainage data of the goaf, such as figure 1 shown, including the following steps:
[0018] S1. Collect the gas drainage concentration of the closed wall of the goaf in the working face, and obtain the gas drainage concentration sequence (X 1 ,X 2 ,...,X i ,...,X n ); where X i is the gas drainage concentration corresponding to the i-th closed wall; n is the total number of closed walls in the goaf of the working face; i=1,2,...,n; in this embodiment, the working face includes air inlet lanes and air return lanes; gas in the goaf flows out to the return air along the buried pipe arranged at the edge of the goaf under the action of wind force Lane, the closed wall is set at the gas outlet of the buried pipe;...
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The invention discloses a method for measuring a goaf gas concentration field by utilizing goaf closed wall extraction data. The method comprises the following steps: S1, collecting gas extraction concentration of a working face goaf closed wall; S2, collecting the lower corner gas concentration of the working face; S3, judging whether the gas extraction concentration of the ith closed wall is smaller than that of the i1th closed wall or not, if so, executing step S4, and if not, ending; and S4, judging whether the gas extraction concentration of the ith closed wall approaches zero or not or whether the gas extraction concentration of the ith closed wall is smaller than the gas concentration of the lower corner of the working face or not, if so, determining a gas concentration field, and if not, ending the process. According to the method for measuring the goaf gas concentration field by utilizing the goaf closed wall extraction data, the goaf gas concentration field can be effectivelymeasured, the calculation is accurate, the process is simple, the analysis efficiency of goaf gas disasters is improved, and the safety production of a coal mine is guaranteed.
Description
technical field [0001] The invention relates to the field of gas, in particular to a method for measuring the gas concentration field of the goaf by using data from closed wall drainage of the goaf. Background technique [0002] Gas control in goafs is a difficult problem in coal mine gas management. Since most of the goafs are compacted spaces, sensors cannot be installed, which makes it impossible to effectively monitor the gas in the goafs, and it is very likely to cause large goafs. Gas hazards, such as gas explosions in goafs, gas hazards in goaf re-mining, etc. [0003] In order to safely extract gas in the goaf, the gas concentration field in the goaf can be measured to provide reliable support for the safe extraction of gas in the goaf. At present, the existing methods of gas concentration field in goafs either have large deviations in calculation results or complicated operation processes. Contents of the invention [0004] In view of this, the purpose of the pr...
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Login to View More IPC IPC(8): G01N33/00G06Q50/02E21F7/00
CPCG01N33/0062G06Q50/02E21F7/00
Inventor 文光才邹云龙赵旭生孙东玲隆清明张庆华蒲阳车禹恒刘延保邓敢博牟景珊代元杰钟川黄雨彭涛王光锦郭小良张雨晴何红梅程晓阳刘文杰徐雪战
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST