The main ore-bearing strata of Xuanhua building stone deposit in western Henan are Middle Cam-brian Zhangxia Formation and Upper Cambrian Gushan Formation.The ore body is mainly composed of do-lomitic limestone and limestone.By analyzing the geological characteristics and mining technical conditions of the deposit,it is considered that the hydrogeological,engineering geological and environmental geological conditions of the area are simple.The mining technical conditions of the deposit are better.Adopting the de-sign with top-down open-pit stepped mining,which can avoid the formation of steep walls and cliffs,and re-duce the rock slip caused by joint cracks.
关键词
建筑石料/地质特征/开采技术条件/宣化/豫西
Key words
building stone/geological characteristics/mining technical conditions/Xuanhua/western Henan
维普
万方数据