Shanxi Linfen Xishan Energy Co.

针对29106工作面高浓度胶结引起的覆岩变形,采用数值模拟方法,在充填开采单工作面区域内,研究充填率对“煤壁-顶板-充填体”类小结构和“煤柱-顶板-充填体”类大结构的上覆岩层运动变化和变形规律的影响;选取合理的高浓度胶结充填材料及参数,采空区充填率超到90%,充填能力可达到150m3/h,并设计高浓度胶结充填系统。通过对工作面受力、工作阻力、顶板移近量的实时监测,结果表明:支架的工作阻力为20MPa,顶板移近量达260mm,顶板相对稳定,首次来压和周期来压不显著,工作面的超前支承压力相对较低。

In view of the deformation of overlying rock caused by high concentration cementation in the 29106 working face, numerical simulation methods are used to study the influence of filling rate on the movement changes and deformation patterns of the overlying strata on the small structure of "coal wall-roof-filling body" and the large structure of "coal pillar-roof-filling body" in the single working face area of filling mining; Select reasonable high concentration cemented filling materials and parameters, with a filling rate of over 90% in the goaf and a filling capacity of 150 m3/h, and design a high concentration cemented filling system. Through real-time monitoring of the working face stress, working resistance, and displacement amount of the roof, the results show that the realtime working resistance of the support is 20 MPa, the movement amount of the roof reaches 260 mm, and the roof is relatively stable. The first and periodic pressure are not significant, and the advance support pressure of the working face is relatively low.