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底阁膏田位于新华夏系第二个隆起带的西侧,与秦岭—昆仑纬向复杂构造带交汇处的次一级构造单元,韩庄一四户地堑内。该地堑轴向E—W,长约70公里,宽约10公里,核部大部分被第四系覆盖,含膏地层为下第三系官庄组,其倾向0°,倾角10°—30°(图1)。冯家湖矿区位于韩庄—四户地堑的西部。根据地下开采巷道资料对比,冯家湖矿区含膏岩系地层主要在第三系官庄组下部,而底阁膏田前王庄矿段含膏岩系在官庄组中部。 (一)矿层变化的一般特征冯家湖矿区有可采膏两层,中间夹有一层不连续的炭质泥岩及石膏砾石,分述如下: 1.下膏层:是主要可采层,厚度1.5—2米,层理不清,矿石呈灰白色,棕灰色粒状结构,
The base cream field is located on the west side of the second uplifted belt of the Xinhua-Xizang and the second-order tectonic unit at the confluence of the Qinling-Kunlun zonal complicated structural belt and within the graben of the Hanzhuang area. The graben E-W is about 70 km long and 10 km wide. Most of the core is covered by the Quaternary. The gypsum-bearing formation is the Lower Triassic Guanzhuang Formation with a dip of 0 ° and an inclination of 10 ° - 30 ° (Figure 1). Fengjiashan mining area is located in the west of Hanzhuang-Sihu graben. According to the comparison of underground mining roadway data, the strata of the Fengjiahu ore-bearing gypsum-bearing rock series are mainly in the lower part of the Guanzhuang Formation of the Tertiary and the gypsum-bearing rocks in the Wangzhuang ore section of the former Getiao field are in the middle part of the Guanzhuang Formation. (A) of the general characteristics of changes in mining Fengjiar mining area has recoverable two layers of sand, sandwiched between a layer of discontinuous carbonaceous mudstone and gypsum gravel, are as follows: 1. Under the cream layer: is the main recoverable layer, the thickness of 1.5- 2 meters, bedding is unclear, the ore is gray, brown-gray granular structure,