关键层破断对地表移动变形超前影响的机理研究

探讨了地表移动变形超前影响的本质，揭示了关键层破断对地表移动变形超前影响的机理。基于关键层理论进行地表移动变形超前影响机理分析，通过分析神东矿区钻孔内部位移监测记录、物理相似模拟试验成果及综采工作面矿压显现规律、地表沉陷观测记录等，研究关键层破断与超前影响距(角)周期性变化之间的关系。研究结果表明：超前影响距(角)不是一成不变的常量，而是周期性变化的变量|原创性提出超前影响距最大值和最小值之差与工作面周期来压步距大致相等的新观点|实例证明新观点是科学可靠的。为探索实现采场来压与地表移动变形的有机统一提供了新的技术思想。

A Fresh Understanding about Advanced Influence of Surface Movement

TIn order to explore the nature of the advance influence of the surface movement, mechanism of the key layer rupture on the advance influence of the surface movement was revealed. Based on the theory of key strata, this paper analyzes the influence mechanism of surface movement and deformation in advance. By analyzing the internal displacement monitoring records of boreholes in Shendong mining area, the results of physical similarity simulation tests, the occurrence law of rock pressure in fully mechanized mining face, and the observation records of surface subsidence, the relationship between the key strata break and the periodic variation of the influence distance (angle) are studied. The results show that the advance influence distance (angle) is not a constant, but a variable that changes periodically. A new viewpoint that the difference between the maximum value and the minimum value of the advance influence distance is roughly equal to the periodic weighting length of the working face is put forward originally. Examples show that the new viewpoint is scientific and reasonable. The paper provides a new technical idea for the organic unity of mining pressure and surface deformation.