摘要
磁西三号勘查区详查阶段钻孔全部进行了井温测量工作，发现区内2、4号煤层处在高温热害区内，且同一水平地温变化较大，2号煤层-800m水平地温最大差值为5．1℃，显示勘查区可能存在地温异常。通过对钻孔测温资料的分析研究，确定本区地温梯度在1．8—2．6℃／100m，与峰峰矿区基本一致；高温区的出现是由于煤层埋藏深度加大和岩浆岩侵人带来的附加热效应而导致地温增加。结果认为，本区为正常地温背景下的高温热害区。
All preliminary exploration stage boreholes in the Cixi No.3 exploration area have been carried out down-hole temperature measurement, found that coal seams Nos.2 and 4 in the area are in high-temperature region; and geothermal changes greatly at same lev- el, maximum difference of coal No.2 at -800m level is 5. 1℃ showing geothermal anomaly could be existed in the area. Through analyt- ic study of temperature measured data, confirmed that the span of geothermal gradient in the area is 1.8-2.6oC/100m, much the same as in rest of the Fengfeng mining area. The present of high-temperature region is due to coal seam buried depth increasing and magmatic intrusion brought additional heat effect result in geothermal increasing. The analytic result considered that high-temperature region in the area is on the backdrop of normal geotherm.
出处
《中国煤炭地质》
2013年第10期40-42,共3页
Coal Geology of China
关键词
钻孔测温
地温异常
地温梯度
磁西勘查区
down-hole temperature measurement
geothermal gradient
Cixi No.3 exploration area
