回坡底矿近距离煤层采空区下工作面矿压显现规律研究

Study on the law of mine pressure behavior in the lower working face of the goaf in the near-soil bed

近距离煤层在我国分布非常广泛,为研究近距离煤层下位煤层开采时顶板的运移规律和采煤工作面的矿压显现规律,以回坡底矿10-101工作面为例,根据工作面详细的地质条件,采用UDEC数值模拟软件模拟研究顶板的垮落特征,通过现场矿压监测分析工作面来压规律,结果表明:由于上位煤层对于下部煤层顶板的破坏,下位煤层开采时,顶板和上覆岩层随采随跨,工作面无明显的周期来压现象,11-101工作面所用液压支架工作阻力富余偏多。

The close distance coal seam is widely distributed in China. In order to study the migration law of the roof and the mining pressure of the coal face during the mining of the lower coal seam in the near coal seam, the 10-101 working face of the back slope mine is taken as an example, according to the working face. Based on the detailed geological conditions, the UDEC numerical simulation software was used to simulate the collapse characteristics of the roof. The on-site mine pressure monitoring and analysis of the working face was used to control the law. The results showed that: due to the damage of the upper coal seam to the lower coal seam roof, the lower coal seam mining, the roof and The overlying strata are covered with the span, and the working surface has no obvious cycle pressure. The hydraulic support of the 11-101 working face has more work resistance.