江西某钨矿山狭长型采空区胶结充填体强度设计

Cemented Back-filling Strength Design for Narrow and Elongated Goaf in a Tungsten Mine of Jiangxi Province

为指导某钨矿山狭长型采空区(采空区长宽比例大于2∶1)充填体强度设计,基于该矿山开采现状和空区赋存情况,通过工程经验类比法和理论分析计算法,估算了采空区充填治理和空区充填后回收剩余矿体时充填体所需理论强度,并采用数值模拟方法对充填体所需理论强度进行验证。结果表明:当对该矿区原有采空区进行充填治理时,充填体所需的自立强度应大于1.177 MPa;当原有采空区充填后,需要对剩余矿体进行回收时,充填体所需理论支撑强度应大于3.429 MPa。该研究可为矿区采空区充填体强度设计提供参考依据。

In order to guide the strength design of the back-filling in a narrow and elongated goaf(with a length to width ratio greater than 2∶1)of a tungsten mine,based on the mining status and occurrence of the goaf,the theoretical strength required for filling treatment in the goaf and the recovery of the remaining ore body after filling was estimated through engineering experience analogy and theoretical analysis calculation methods.The theoretical strength required for back-filling was verified by using numerical simulation methods.The results indicate that when filling and controlling the original goaf in the mining area,the required self-supporting strength of the back-filling should be greater than 1.177 MPa;When the remaining ore body needs to be recovered after filling the original goaf,the theoretical support strength required for the back-filling should be greater than 3.429 MPa.This study can provide a reference basis for the strength design of back-filling in goaf of mining areas.