某煤矿3411工作面窄煤柱留设可行性分析

Feasible Analysis of the Narrow Pillar in 3411 Working Face of a Coal Mine

为考察某煤矿3411工作面与3408工作面之间留设10 m宽窄煤柱的合理性,结合工况条件设计了矿压观测方案。观测结果表明:3411工作面运输顺槽在与3408工作面相向采掘阶段,巷道变形量较大,但可以满足生产对巷道断面的要求;在进行适当支护的条件下,巷道顶板未出现明显的离层现象,巷道围岩基本稳定,巷道锚杆(索)支护状态良好,围岩变形得以有效控制。综合研究表明:在该矿3411工作面与3408工作面之间留设10 m宽窄煤柱的方案在进行适当支护的条件下具有可行性。

In order to analyze the rationality of 10 m width narrow coal pillar between 3411 working face of 3408 working face of a coal mine, combing with the working conditions of the mine, the mine pres- sure observation scheme is designed. The observation analysis results show that during the opposite exca- vation period of the transportation grooves of 3411 working face and 3408 working face, although the de- formation of roadway is significant, it can meet the requirements of underground production to roadway section;under the condition of proper supporting, the roof separation phenomenon of roadway is not obvi- ous,the surrounding rock mass of roadway is basically stable, the supporting state of anchor rod （rope） is good, the deformation of surrounding rock can be controlled effectively. The comprehensive study results indicated that the scheme of 10 m width narrow coal pillar between 3411 working face of 3408 working face of the mine is feasible under the exsiting production conditions.