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地下气化过程中煤系沉积岩热物理试验研究
Thermal Physics Experimental Study on Coal Series Sedimentary Rocks in the Process of Underground Gasification
投稿时间: 2017-03-14  最后修改时间: 2017-05-23
DOI:
中文关键词:  高温  比热容  导热系数  沉积岩
英文关键词:high temperature  specific heat capacity  thermal conductivity coefficient  sedimentary rock
基金项目:
作者单位E-mail
张华磊 安徽理工大学 hlzhang1122@126.com 
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中文摘要:
      利用GHC-Ⅱ型比热容测试仪、DRX-Ⅱ型导热系数测定仪等仪器,对乌兰察布地下气化煤层顶板泥岩、砂质泥岩、细砂岩、粗砂岩及粉砂岩等5种沉积岩体进行了50℃~1000℃范围内的高温物理试验研究,分析了不同温度梯度下的比热容及导热系数随温度的变化规律,并用多项式函数对泥岩等5种岩性岩样的导热系数测定结果进行了拟合,得到了导热系数与温度的拟合关系式。得出:顶板泥岩等5种岩性岩样的比热容值随着温度的升高呈现下降趋势,在100℃~400℃范围内,泥岩等5种岩性岩样的比热容值下降趋势较为明显;顶板泥岩等5种岩性岩样的导热系数值随着温度的升高呈现下降趋势,随着温度的升高粗砂岩导热系数值变化最大,由50℃时的1.412 W/m.K下降至1000℃时的0.900 W/m.K,减小了36.3%;随着温度升高粉砂岩导热系数值变化最小,其值由50℃时的1.200 W/m.K下降至1000℃时的0.901 W/m.K,减小了24.9%。研究结果为研究煤炭地下气化空间温度场分布提供了重要的理论及基础数据。
英文摘要:
      The high temperature physics experiment of mudstone, sandy mudstone, fine sandstone, gritrock, siltstone, etc. Five sedimentary rock mass in Wulanchabu underground gasification coal seam roof were carried on in the temperature of 50℃~1000℃, by using GHC- type specific heat capacity measuring apparatus, DRX- type thermal conductivity measuring apparatus and other measuring apparatus, and the variation regulation of specific heat capacity and thermal conductivity coefficient under different temperature gradient was analyzed, and the results of the determination of thermal conductivity coefficient of mudstone and other 5 kinds lithology are fitted by polynomial function, The fitting formula between the thermal conductivity coefficient and the temperature was obtained. With the increasing of temperature ,the specific heat capacity value of the five kinds of roof rock samples’ lithology have a downtrend, and in the 100℃~400℃ temperature range, the value have a significantly decrease . With the increasing of temperature , the thermal conductivity coefficient value of the five kinds of roof rock samples’ lithology have a downtrend. With the increasing of temperature, the thermal conductivity coefficient value of gritrock has the greatest change among the 5 kinds of roof lithology, from 1.412 W/m.K at 50℃ down to 0.900 W/m.K at1000℃, reduced by 36.3% . With the increasing of temperature, the thermal conductivity coefficient value of the siltstone has the smallest change among the 5kinds of roof lithology, from 1.200W/m.K at 50℃ down to 0.901 W/m.K at 1000℃, reduced by 24.9% . The research results provide important theoretical and basic data for the study of temperature field distribution in underground coal gasification
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