极近距离煤层采空区下开采技术研究

Research on mining technology under goaf of ultra-close multiple seams

本文针对极近距离煤层群采空区下煤层开采的难题,阐述了极近距离煤层研究现状,对其特点提出了采用应力改变率选取下煤层开采回采巷道合理位置的方法,并确定了不同条件下巷道的合理断面形状及合理支护方式。根据西曲矿的具体条件,建立了数值模拟模型,确定了合理的巷道位置为内错6m布置以及合理的巷道断面形状、支护方式。

Aiming at the mining problem of ultra-close multiple seams under goaf, the research status of ultra-close multiple seams is elaborated. The method of selecting the reasonable position of the coal mining roadway is put forward by the rates of stress variation. This paper puts forward the reasonable section shape and reasonable support mode of roadway under different conditions. According to the specific conditions of Xiqu mine, numerical simulation model is set up and the reasonable roadway position is 6 m. The reasonable section shape and support method of roadway are determined.