某方解石矿群空区稳定性数值模拟分析

Numerical Simulation Analysis of Goafs Stability in Calcite Mine

地下开采的矿山采用空场法回采时,会留下许多采空区,当这些采空区构成群空区时,对矿山是一个重大的安全隐患,需要根据采空区的特性提出合理治理措施,因而群空区的稳定性评判至关重要。为了分析研究某方解石群空区的稳定性状态,进行了矿山现有采空区的调查,确定采空区的基本信息,然后采用数值模拟计算方法,建立矿山采空区三维立体模型,分别从采空区跨度和留设的点柱尺寸方面进行了3组模型的数值模拟计算分析,确定矿山采空区的安全跨度和安全矿柱尺寸,从而判断群空区的稳定性,为后续采空区治理提供理论依据。

A lot of goafs are left when the underground mine adopts the open stoping method,which will pose a great threat to the safety of mine when these mined-out area constitute goafs group. So the reasonable measures should be taken according to the characteristics of the goafs. It is vital to make the stability evaluation on goafs. In order to analyze the stability state of goafs in a calcite mine,the investigation on existing goafs is conducted to get its basic information. Then three-dimensional model for mined-out area is established via the numerical simulation method. The numerical simulation analysis on three groups of models is carried out respectively from the width of goaf and size of pillar to get the reasonable width of goaf and size of pillar and confirm the stability state of group goafs,which provides theoretical basis for the following treatment of goafs.