基于AHP-FUZZY的采空区治理方法优选研究

Research on Optimization of Goaf Management Method Based on AHP-FUZZY

地下矿山采用空场法或崩落法开采时,不可避免会形成大量的采空区,对井下作业人员、地表环境及工业设施构成严重威胁。因此,合理的采空区治理方法对于矿山安全生产及高效开采尤为重要。以锡林浩特萤石矿浅孔留矿法开采现状为工程背景,采用现场调研、数值模拟与AHP-FUZZY相结合的方法,研究了空区存在对竖井稳固性的影响,在此基础上优选了采空区治理方法。研究结果表明,保安矿柱内的矿体被部分开采破坏,其破坏角变化范围为15°~17°;并且副井附近的最大主应力与剪应力分别为3.0 MPa与1.5 MPa,最大位移值为9.0 cm,竖井的安全运行必将受到空区威胁;综合安全、经济、合理程度及劳动生产率等因素,优选得到崩落部分顶柱+全尾砂充填采空区为最佳治理方法,为在产矿山的采空区治理方法优选提供借鉴与指导。

When underground mines are mined by the open stope method or the caving method,a large number of goafs will inevitably be formed,posing a serious threat to underground operators,the surface environment and industrial fa⁃cilities.Therefore,reasonable goaf management methods are particularly important for mine safety and efficient mining.In this paper,taking the mining status of the Xilinhaote fluorite ore which using short-hole shrinkage method as the engineering background,the method of field investigation,numerical simulation and AHP-FUZZY was used to study the influence of the existence of empty areas on the stability of the shaft,and based on this,the goaf management method was optimized.The re⁃search results show that the ore body in the security pillar is partially damaged by mining,its damage angle ranges from 15°to 17°;and the maximum principal stress and shear stress near the auxiliary well are 3.0 MPa and 1.5 MPa,respectively,the maximum displacement value is 9.0 cm,and the safe operation of the shaft must be threatened by the empty area.Consid⁃ering factors such as safety,economy,rationality,and labor productivity,it is preferable to obtain the collapsed part top pil⁃lar and full tailings to fill the goaf as the best treatment method.This will provide reference and guidance for the optimization of goaf management methods in producing mines.