摘要
在采用矿井高密度电阻率法测量装置的前提下,总结了典型煤矿导水构造,建立了煤矿底板导水构造电性变化的地电模型.利用三维电法正演软件对不同参数的导水构造(导电性变化和规模尺寸变化)的地电模型进行了数值模拟.结果表明:在文中的观测条件下,煤矿导水构造的导电性变化幅度超过20%时其视电阻率特征就出现明显变化,而其规模尺寸要增大4倍后,其视电阻率特征才开始出现明显变化,说明地质构造的导电性变化对视电阻率的影响更直接;采用三极法装置探测更容易发现产状陡立的低阻体;为使低阻体反映更明显,探测过程中尽量使测线通过勘探目标的上方.
On the premise of applying mine high-density resistivity method, we study some typ- ical water conducted structures in coal mines, and establish some geoelectric models for water conducted structures in coal mine floor with electrical changing. In addition, we numerically simulated, using three-dimensional electrical forward software, the geoelectric model with different parameters of water conducted structures （conductivity changing and the scale of size changing）. The results show that, under the observation conditions in our study, the apparent resistivity has a significant change （over 20%） with the change of conductivity of water conducted structures, but its size increases by 4 times. This indicates that the conductivity of geological structure has more direct effect on the apparent resistivity. It is easier to detect steep dipping beds with low-impedance by using Pole-Dipole system. In order to more clearly reflect the low resistivity body, we should make sure to lay the surveying line as far as possible over the exploration target.
出处
《采矿与安全工程学报》
EI
北大核心
2010年第3期316-321,共6页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2007CB209400)
关键词
煤矿突水
矿井电法
导水构造
电性变化
视电阻率
mine water inrush
mine electric method
water conducted structure
electrical changing
apparent resistivity
