丰沛煤田张双楼矿区山西组7煤层冲刷特征分析

Shanxi Formation No.7 Coal Seam Scouring Features Analysis in Zhangshuanglou Mine Area,Fengpei Coalfield

丰沛煤田双楼矿区主采煤层为山西组7煤层,据勘查及井下实际揭露,7煤层厚度为0.24～5.87m,平均2.49m,11线以东较厚、17线以西的地区形成了不少的薄煤区或无煤区。从沉积基底、煤质特征、顶板砂体、煤岩接触关系、冲刷遗留现象、煤层薄化突变性等方面分析了煤层变化的原因,指出区内煤层变薄是由于后生冲刷所致,其冲刷带主要沿河道呈近东西向展布。研究结果为煤矿的后期生产了提供科学依据。

The main mineable coal seam is the No.7 coal seam of the Shanxi Formation in the Zhangshuanglou mine area,Fengpei coalfield.According to exploration and underground mining opened up data,the coal seam＇s thickness is 0.24~5.87m,average 2.49m,to the east of the No.11 exploration line is rather thick,to the west of the No.17 exploration line has respectable thin seam areas and barren areas.After analyzed coal thickness variation causations from aspects of basement,coal quality characteristics,roof sand body,coal and rock contact,scouring remnants,coal seam abruptly thinning etc.,pointed out that the thinning of coal seam in the area is mainly from epigenetic scouring,the scouring zones are mainly distributed along the channels spreading from east to west.The result has provided scientific basis for coalmine later stage production.