第三系水文地质特征与留设风氧化带煤柱开采

Neogene System Hydro-geological Features and Mining Research with Retaining wind Oxidation Zone Pillars

新集三矿位于淮南煤田中段南部边缘,地层直立倒转。新生界沉积层平均厚约149 m,其中第四系流沙层厚约84 m,第三系沉积层厚约65 m,矿井初步设计开采上限-220 m。为合理回收煤炭资源,新集三矿不断加强第三系沉积层的赋水性研究,最终将开采上限由-220 m提高到-200 m,同时还在井田局部地段实现留设风氧化带煤柱开采。

Xinji No.3 Coal Mine is in the southern edgeof vertical strata reverse, Huainan Coalfield Middle. The cenozoic average thickness of sedimentary layer is about 149 m. The fourth of the quicksand thickness is about 84 m. The third of the sediment thickness is about 65 m. The preliminary design exploitation of the mine ceiling is - 220 m. For a reasonable recovery of coal resources, the aquifer study of the third of the sedimentary layer is continuously strengthened in Xinji No. 3 Coal Mine. The start limit of the exploitation is eventually raised form - 220 m to - 200 m. At the same time, mining with retaining wind oxidation zone pillars is realized in local mine field.