不等厚松散层大采高工作面支架适应性研究

Study on Support Adaptability of High Cutting Height Working Face with Unequal Unconsolidated Strata

为了研究纳二矿621-01综采工作面不等厚松散层下支架选择的合理性,采用现场实测与UDEC数值模拟对比分析。埋深为178～185.5 m时、基载比平均为3.31;埋深为110～135 m时,基载比平均为5.63。现场实测发现工作面周期来压步距为18.9～28.7 m,基载比越大时工作面支架工作阻力越小、动载系数越小,矿压显现缓和,数值模拟与实测结果相吻合。

In order to study the powered support selection rationality of unequal unconsolidated strata in Na 2 mine 621-01 working face,the field measurement and UDEC numerical simulation was carried out.When the depth is from 178 m to 185.5 m,the ratio of rock and loading is 3.31,the ratio of rock and loading is 5.63 with the depth is from 110 m to 135 m.The site measurement found that the periodic weighting length from 18.9 m to 28.7 m,when ratio of rock and loading is bigger,the working resistance and the dynamic load factor is smaller,the lower the ground pressure,the numerical simulation is in agreement with the measured results.