The objective of this study was to reveal the law of overburden movement and stress evolution during the mining of super-high fully mechanized mining faces. Based on the 12401 fully mechanized mining face of Shangwan Coal Mine in Shendong, this study conducted research and analysis using the methods of similarity simulation experiment, numerical simulation, and field measurement. The results showed that the maximum and minimum principal stresses in the coal seam in front of the working face are concentrated with the advance of the working face. The degree of stress concentration increases with the increase in the advancing range, and the concentration degree of the maximum principal stress and the change gradient is greater than that of the minimum principal stress. But the range of the peak lead coal wall is lower than that of the minimum principal stress of the peak lead coal wall. The phenomenon of stress recovery exists in the goaf. With the increase in the advancing range of the working face, the degree of stress recovery gradually increases, and the degree of maximum principal stress recovery is higher than that of the minimum principal stress recovery. The large fractures observed near the working face are closely related to the underground pressure, relatively large fractures appear on the surface, and the fractures become narrower near the two pathways. Only caving and fissure zones exist in the thin bedrock overburden, and the bending subsidence zone changes with the bedrock thickness. The support strength of the hydraulic support should not be less than 1.47 MPa. This research on the overburden movement and stress evolution law of a super-high fully mechanized mining face can provide theoretical guidance for the exploitation and utilization of extrathick coal seam resources. It has broad engineering prospects.

中文翻译：

---

浅埋超高综采工作面覆岩动力演化规律及支护强度确定

本研究旨在揭示超高综采工作面开采过程中上覆岩层运动及应力演化规律。本研究以神东上湾煤矿12401综采工作面为研究对象，采用相似模拟试验、数值模拟、现场实测等方法进行研究分析。结果表明，工作面前方煤层的最大和最小主应力随着工作面的前进而集中。应力集中程度随着推进幅度的增大而增大，最大主应力和变化梯度的集中程度大于最小主应力的集中程度。但尖峰煤壁的范围小于尖峰煤壁的最小主应力范围。采空区存在应力恢复现象。随着工作面推进幅度的增大，应力恢复程度逐渐增大，最大主应力恢复程度高于最小主应力恢复程度。工作面附近观察到的大裂缝与​​地下压力密切相关，地表出现较大的裂缝，两条路径附近裂缝变窄。薄基岩覆盖层仅存在崩落带和裂隙带，弯曲沉降带随基岩厚度变化而变化。液压支架的支撑强度应不小于1.47MPa。对超高综采工作面覆岩运动及应力演化规律的研究可为特厚煤层资源的开发利用提供理论指导。具有广阔的工程前景。