A Method for Evaluating Sectional Gas Drainage Effects Using Drill Field Gas Drainage Data
A gas extraction and drilling technology, which is applied in gas discharge, earthwork drilling, mining equipment, etc., can solve the problems of inability to guide mine production, inability to evaluate the effect of gas extraction in adjacent areas, and heavy workload.
Active Publication Date: 2016-07-06
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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Problems solved by technology
The current evaluation method for the effect of gas drainage in coal mines is very primitive. Generally, workers go down the mine to measure the gas concentration of the drainage pipeline or read the monitoring data of gas drainage, and artificially calculate the drainage volume. This method has several shortcomings. Disadvantages: (1) The workload is huge, and the sampling data is generally more than 3 months old, and the amount of data is large
(2) The evaluation method does not consider the impact of gas geological information on the drainage effect in different areas, making the evaluation of the drainage effect inaccurate
(3) Existing evaluation methods can only evaluate areas that have been managed by drainage, but cannot evaluate the effect of gas drainage in adjacent areas, and cannot guide mine production
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[0036] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.
[0037] A method for evaluating the effect of section gas drainage by using gas drainage data at a drilling site, specifically comprising the following steps:
[0038] 1) Using the scalar data X extracted from the drilling site t Calculate the cumulative amount of drainage at the drilling site and its development trend (use the existing data to fit and speculate the future data, which is the development trend), and the development trend is processed by numerical fitting;
[0039] Q t When it is the cumulative extraction volume:
[0040] Q t = Σ t = 0 ...
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The invention discloses a method for evaluating the section gas drainage effect by using the gas drainage data of a drilling site, which comprises the following steps: 1) using X t Calculation of cumulative gas drainage Q t and its development trend f(t); 2) Using gas geological information to obtain W 0 , and use the drainage standard critical value W′ to calculate the accumulative drainage standard Q c ; 3) Use Q t , f(t) and W 0 Evaluate the effect of gas drainage in the control area of the drilling site; 4) use Q t , f(t) and Q c Calculate the standard effect of drainage in the control range of the drilling site; 5) use Q t , f(t), W′ 0 、C 1 、C 2 , L 1 Evaluate the critical value of drainage in adjacent areas to evaluate the effect of gas drainage in adjacent areas. The invention proposes for the first time that the gas drainage effect of the control range of the drilling field and the adjacent area is analyzed and evaluated by using the drainage metering data of the drilling field. Realized the online evaluation of the drainage in the control area of the drilling site and the pre-evaluation of the drainage effect in the adjacent area.
Description
technical field [0001] The invention relates to a method for evaluating the effect of gas drainage, in particular to a method for evaluating the effect of gas drainage in a section by using gas drainage data in a drilling field. Background technique [0002] Gas drainage is the key to gas control in coal mines. Most of the gas accidents in coal mines are caused by misjudgment of the effect of gas drainage or lack of attention. Therefore, how to effectively monitor and evaluate the effect of gas drainage is extremely important to the safe production of coal mines. The current evaluation method for the effect of gas drainage in coal mines is very primitive. Generally, workers go down the mine to measure the gas concentration of the drainage pipeline or read the monitoring data of gas drainage, and artificially calculate the drainage volume. This method has several shortcomings. Disadvantages: (1) The workload is huge, and the sampling data is generally more than 3 months old,...
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IPC IPC(8): E21F7/00
Inventor 赵旭生邹云龙张庆华胡千庭文光才邓敢博何亚波刘文杰
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD