任楼井田地质构造特征及两期古构造应力场的研究

Geological Structural Features and Paleotectonic Stress Field of Two Stages in Renlou Mine Field

通过对皖北矿务局任楼矿井宏观地质构造特征及小断裂统计分析，得出该井田含煤田地层沉积后，历经两期或两期以上地质构造运动。两期应力场大角度横跨叠加复合的结果，形成NNW─NE（345°～55°）方位的应力拉伸区，该方位构造形迹一般是压性、压剪性或先引张后压紧等力学性质，是良好的隔水、阻气（瓦斯）构造；而从NNW～SWW（345°－240°）方位为应力压缩区，该方位的中高倾角正断层，一般开启性较好，呈张性、张剪性或先压紧后松张，是良好的储、导水和排气通道。

Based on analysising the macrostructure features and the statistics of small-sized fault in Renloumine of wanbei Mining Bureau, it is concluded that the field suffered two or more period of tectonic movementafter the coal-bearing strata had been deposited. As a result of the compound of two periods Of stress fieldwith great different direction, the streching stress area of NNW-NW[345─55] direction was formed. Thisfault of this direction appears compressive. compressive - sheering or tensile then compressive mechanics features, which is of strong water and gas insolution. Meanwhile the compressive stress area of NNW- SW[340 - 240] direction exists in the field. The steep incline momal fault of the direction, which is generally open fault, appears tensile, tensile - sheering or compressive then tensile. This type or fault is water - bearingand transmissibility for water or gas.