陶二煤矿扩大区地温分带及变化规律研究

A Study on Subsurface Temperature Zoning and Variation Pattern in Extended Area,Taoer Coalmine,Hebei

通过对区内参与资料编制的16个钻孔的简易测温和近似稳态测温曲线的分析,以20m垂深作为变温带与恒温带的分界点,40m垂深作为恒温带与内热带的分界点。在计算地温梯度的基础上,总结出区内地温梯度的变化规律:向斜轴部较小,背斜轴部及断层发育部位较大。对-700m水平的地温梯度进行了分析,认为背斜轴部之所以地温梯度较大,是由于其轴部的老地层向上隆起抬升,而这些老地层的地温普遍偏高;断裂带的地温梯度大,是由于断层导升了深层热能所致。此结果可为矿井高温热害区的预判及防治起到指导作用。

Through the facility thermometric data and approximation steady static thermometric curve analyses of 16 boreholes participated in the area＇s geothermal data compilation has determined the vertical 20m depth as the boundary point of variable zone and constant zone of subsurface temperature,vertical 40m depth as the boundary point of constant zone and increasing zone of subsurface temperature.Summarized geothermal gradient variation pattern on the geothermal computation basis has found that the gradient is smaller in synclinal axis and larger in anticlinal axis and fault developed area.After analyzed geothermal gradient around-700m level,considered that the larger gradient in the anticlinal axis is because of older strata with higher geotemperature elevated there;in fault zone is because of deep part heat energy rising along the zone.The research findings can have steering effects in coalmine high temperature geothermal disaster area prediction and control.