解吸法测定煤层瓦斯含量中瓦斯损失量计算方法研究
发布时间：2018-08-29 07:34
【摘要】：解吸法测定煤层瓦斯含量时,煤层瓦斯含量测定的误差主要来源瓦斯损失量。目前瓦斯损失量计算方法建立的是瓦斯解吸参数与时间之间的关系,各方法计算结果都会受到时间因素的影响。本文以瓦斯损失量计算方法为研究核心,以准确、快速测定煤层瓦斯含量为目的,采用理论、实验和现场相结合的研究方法,对瓦斯损失量计算方法进行了深入研究。以瓦斯吸附一解吸理论为基础,在实验室模拟了煤的瓦斯自然解吸过程,通过对实验数据的对比分析得出了瓦斯吸附平衡压力、煤的粒度和硬度对瓦斯解吸的影响规律。基于实验解吸数据,在时间因素上对目前瓦斯损失量计算方法进行了分析。其中,选取的解吸初期测点个数越多,各计算方法瓦斯损失量推算值越小;取样时间越长,各计算方法推算值与真实值差值的绝对值越大,所占煤层瓦斯含量的比重越大,增大了煤层瓦斯含量的测定误差;读数间隔对计算结果也会产生影响,但是影响效果不显著。煤样相同时,不同吸附平衡压力下的瓦斯解吸曲线形状相同,从侧面说明了同种煤样在不同吸附平衡压力下的瓦斯解吸规律符合同一个函数类型,只不过是不同吸附平衡压力下的拟合参数各不相同而已。基于这一结论和相关分析理论,提出了一种不受时间因素影响和符合实际的瓦斯损失量计算新方法:利用时序数据匹配模型来推算瓦斯损失量。基于建立的数据匹配模型,将井下数据与实验室数据进行匹配,在实验室数据中找到与井下数据相匹配的解吸数据,拟合出两组数据之间的关系,结合现场取样时间,可以反推瓦斯损失量。该计算方法得到了现场验证,计算结果可靠。
[Abstract]:When desorption method is used to measure coal seam gas content, the error of coal seam gas content measurement is mainly caused by gas loss. At present, the calculation method of gas loss is based on the relationship between the parameters of gas desorption and time, and the results of each method will be affected by the time factor. In this paper, the calculation method of gas loss is taken as the core of the research, and the method of calculating the amount of gas loss is deeply studied by using the research method of combining theory, experiment and field with the purpose of accurate and rapid determination of gas content in coal seam. Based on the theory of gas adsorption-desorption, the natural desorption process of coal is simulated in the laboratory. The influence of gas adsorption equilibrium pressure, coal particle size and hardness on gas desorption is obtained by comparing and analyzing the experimental data. Based on the experimental desorption data, the current calculation methods of gas loss are analyzed in terms of time factors. Among them, the more the number of desorption points selected, the smaller the calculated value of gas loss, the longer the sampling time, the greater the absolute value of the difference between the calculated value and the real value, the greater the proportion of gas content in coal seam. The measurement error of coal seam gas content is increased, and the reading interval also affects the calculation results, but the effect is not significant. When the coal sample is the same, the gas desorption curve under different adsorption equilibrium pressure is the same, which shows that the law of gas desorption of the same coal sample under different adsorption equilibrium pressure accords with the same function type. It is only that the fitting parameters are different under different adsorption equilibrium pressures. Based on this conclusion and related analysis theory, a new method for calculating gas loss is proposed, which is not affected by time factors and is in line with the actual situation. The method is to calculate the amount of gas loss by using the matching model of time series data. Based on the established data matching model, the underground data and the laboratory data are matched, the desorption data matching with the underground data is found in the laboratory data, the relationship between the two groups of data is fitted, and the sampling time in the field is combined. The amount of gas loss can be pushed back. The method is verified in the field and the result is reliable.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD712.3
本文编号：2210625
[Abstract]:When desorption method is used to measure coal seam gas content, the error of coal seam gas content measurement is mainly caused by gas loss. At present, the calculation method of gas loss is based on the relationship between the parameters of gas desorption and time, and the results of each method will be affected by the time factor. In this paper, the calculation method of gas loss is taken as the core of the research, and the method of calculating the amount of gas loss is deeply studied by using the research method of combining theory, experiment and field with the purpose of accurate and rapid determination of gas content in coal seam. Based on the theory of gas adsorption-desorption, the natural desorption process of coal is simulated in the laboratory. The influence of gas adsorption equilibrium pressure, coal particle size and hardness on gas desorption is obtained by comparing and analyzing the experimental data. Based on the experimental desorption data, the current calculation methods of gas loss are analyzed in terms of time factors. Among them, the more the number of desorption points selected, the smaller the calculated value of gas loss, the longer the sampling time, the greater the absolute value of the difference between the calculated value and the real value, the greater the proportion of gas content in coal seam. The measurement error of coal seam gas content is increased, and the reading interval also affects the calculation results, but the effect is not significant. When the coal sample is the same, the gas desorption curve under different adsorption equilibrium pressure is the same, which shows that the law of gas desorption of the same coal sample under different adsorption equilibrium pressure accords with the same function type. It is only that the fitting parameters are different under different adsorption equilibrium pressures. Based on this conclusion and related analysis theory, a new method for calculating gas loss is proposed, which is not affected by time factors and is in line with the actual situation. The method is to calculate the amount of gas loss by using the matching model of time series data. Based on the established data matching model, the underground data and the laboratory data are matched, the desorption data matching with the underground data is found in the laboratory data, the relationship between the two groups of data is fitted, and the sampling time in the field is combined. The amount of gas loss can be pushed back. The method is verified in the field and the result is reliable.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD712.3
【参考文献】
相关期刊论文 前10条
1 杨守国;邱阳;李树刚;李国玉;杨怀民;;瓦斯含量直接测定中瓦斯损失量计算方法的比较分析[J];煤炭技术;2016年11期
2 赵发军;陈学习;刘彦伟;;损失瓦斯量与煤的破坏类型关系研究[J];中国安全生产科学技术;2016年10期
3 陈向军;王兆丰;王林;;取样过程中损失瓦斯量推算模型研究[J];煤矿安全;2013年09期
4 Qin Yueping;Wang Yaru;Yang Xiaobin;Liu Wei;Luo Wei;;Experimental study on dynamic gas adsorption[J];International Journal of Mining Science and Technology;2012年06期
5 秦跃平;王健;罗维;王亚茹;;定压动态瓦斯解吸规律实验[J];辽宁工程技术大学学报(自然科学版);2012年05期
6 齐黎明;陈学习;程五一;马尚权;;新型煤层瓦斯含量准确测定方法研究[J];采矿与安全工程学报;2010年01期
7 范章群;;煤层气解吸研究的现状及发展趋势[J];中国煤层气;2008年04期
8 仇海生;张保泉;;利用煤钻屑瓦斯解吸指标法测定煤层瓦斯含量[J];煤矿安全;2007年07期
9 胡千庭;邹银辉;文光才;赵旭生;;瓦斯含量法预测突出危险新技术[J];煤炭学报;2007年03期
10 齐黎明;赵玉岐;王轶波;宋晓燕;刘德民;;基于封孔前瓦斯损失量的测压结果修正分析[J];煤炭学报;2007年01期
，本文编号：2210625
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