掘进工作面支护优化研究与应用

Research and application of optimization of driving face support

以山西凌志达煤矿15203煤巷存在的问题着手,取现场岩石试样放置室内实验室进行试验,确定岩石强度准则,测出其物理力学参数。运用FLAC3D数值计算软件基于M-C强度准则,对该煤矿15203煤巷掘进巷道相同应力及位移边界条件下,不同支护方式所具有的巷道变形量、应力集中程度、巷道顶底板破坏特点进行了数值模拟;结合现场实测数据,提出最优方案用于15203煤巷掘进工作面的现场支护,降低支护成本,提高掘进效率,满足该矿的正常采掘衔接。

Based on the problems existing in the 15203 coal roadway of Lingzhida Mine in Shanxi Province, the rock samples were placed in the indoor laboratory for testing, the rock strength criterion was determined, and the physical and mechanical parameters were measured. Based on the MC strength criterion, the FLAC3D numerical calculation software was used to simulate the deformation of the roadway, the degree of stress concentration and the damage characteristics of the roof and floor of the roadway under the same stress and displacement boundary conditions of the 15203 coal roadway. Combined with the field measured data, the optimal scheme was proposed for the on-site support of the 15203 coal roadway heading face, reducing the support cost, improving the mining efficiency, and meeting the normal mining connection of the mine.