富宁铅锌矿地表河流防水保安矿柱厚度的确定

Determination of the Thickness of Waterproof and Security Pillars for Surface Rivers in Funing Lead-Zinc Mine

为研究确定富宁铅锌矿河流防水保安矿柱厚度合理留设的问题,结合富宁铅锌矿0号勘探线附近的实际工程地质条件,采用导水裂隙带理论计算公式得出导水裂隙带高度,进而确定那郎河床下的防水保安矿柱厚度为30 m,以此来切断河水与矿体之间的水力联系;同时为了减少地下开采对地表河流的扰动,井下采矿方法采用分层充填法措施来确保上部那郎河的长治久安。

In order to study and determine the reasonable thickness of river waterproof security pillar in Funing Lead-Zinc Mine,and combine with the actual engineering geological conditions near the No.0 exploration line of the Funing Lead-Zinc Mine,the height of water flowing fracture zone is obtained by using the theoretical calculation formula of water conducting fracture zone,and then the thickness of waterproof security pillar under NaLang River bed is determined to be 30 meters,so as to cut off the hydraulic connection between the river and the ore body.At the same time,in order to reduce the disturbance of underground mining to the surface river,the slicing and filling method is adopted to ensure the long-term stability of the upper NaLang River.