为研究仰斜综采工作面采动覆岩压实区裂隙演化规律的煤层倾角效应，用物理相似模拟试验及理论分析相结合的研究方法，开展不同煤层倾角条件下采动覆岩压实区裂隙演化规律的研究，得到了压实区高度、垮落角以及宽度随煤层倾角变化的演化规律，进而建立了压实区演化煤层倾角效应模型。结果表明：随着煤层倾角的增大(0°<15°<30°），平均来压步距逐渐减小(12.5 m>11.6 m>10.4 m），采动覆岩离层量逐渐增加。同时，以采动覆岩离层量和底板应力为压实区边界判定依据，分析得出压实区高度随煤层倾角的增大而不断增大，且压实区高度变化趋势所拟合的直线斜率所组成的曲线随工作面推进距离的增加出现平缓、陡增、平缓的变化趋势，即压实区在形成初期高度相差不大，但会在工作面推进至55～65 m时高差迅速增大，且维持此较大高差直至工作面回采结束；随煤层倾角的增大，开切眼侧垮落角逐渐减小，而工作面侧垮落角逐渐增大；以压实区的高度和垮落角的演化规律为基础，建立了压实区空间简化模型，进一步得到压实区宽度随煤层倾角变化的数学表达式。最后，以采动裂隙椭抛带理论为基础，结合试验结果，建立了考虑煤层倾角的采动裂隙椭抛带压实区数学方程，为仰斜综采工作面准确定位卸压瓦斯储集优势区提供一定的理论依据。

In order to study the dip angle effect of the coal seam compacted area in the fully-mechanized rise mining face，the physical similarity simulation test and theoretical analysis were combined to study the cracks in the overburden compacted area under different coal seam dip conditions. According to the height of the compacted area，the collapse angles and the width of the compacted area，the study of fracture evolution law has established a dip effect model of the evolutionary coal seam dip in the compacted area. The results showed that with the increase of the dip angle of the coal seam(0°<15°<30°)，the average pressure step was gradually reduced(12.5 m>11.6 m>10.4 m),the abscission layer of rock was increasing. At the same time，the numerical value of the abscission layer of rock and the local concentration of the floor stress were used as the basis for determining the boundary of the compacted area. It was concluded that the height of the compacted area increased with the increase of the dip angle of the coal seam. The curve composed of the slope value of the height fitting straight line of the compacted area showed a gentle，steep and gentle change rule. This meant that the compacted area had little difference in height at the initial stage of formation，but it would rapidly increase the height difference and maintained the state of the large height difference when the working surface was advanced to 55-65 m. What’s more，the collapse angles of the working face side and the cut-off side showed an increasing and decreasing trend with the increase of the coal seam dip angle. Then，based on the evolution of the height of the compacted area and the collapse angles，a simplified model of the compaction zone was established，and the mathematical expression equation of the width of the compacted area increased with the dip angle of the coal seam. Finally，based on the theory of mining fracture ellipse belt，combined with the experimental results，the mathematical equation of the compacted area of the mining fracture elliptical belt affected by the dip angle factor of coal seam was established，which provided a reliable theoretical basis for accurately located the gas enrichment area in the up-dip working face of coal mining.

0 引言

1 试验

   1.1 试验依据

   1.2 试验设计

2 试验结果

   2.1 上覆岩层来压规律

   2.2 覆岩离层量分布规律

   2.3 工作面底板应力分布特征

   2.4 压实区的空间演化规律

3 讨论

   3.1 压实区高度的倾角效应分析

   3.2 压实区垮落角的倾角效应分析

   3.3 压实区宽度的倾角效应分析

4 采动裂隙椭抛带压实区演化倾角效应模型

5 结论