通过数值模拟、X光衍射、扫描电镜、现场实测等手段,研究了两淮矿区不同采深和采厚情况下回采工作面前方支承压力分区变异特征.结果表明,超浅部风氧化带内开采时,岩石由于受到沉积水环境和风化的影响,强度降低,塑性变形能力增强,压力呈现静压大,动压小,动载系数小的趋势;开采进入常规深度时,岩石弹性变形能力增强,支承压力峰值强度也随着采深增加而增加,峰值压力集中系数增加;开采进入深部时,由于高温度和高地压等因素影响,岩石的强度降低,塑性变形能力增强,支承压力峰值强度增加,但峰值压力集中系数却呈下降趋势,岩层逐渐呈现出黏塑性变形;随着开采煤层的厚度增加,采场前方支承压力峰值集中系数减小,峰值离煤壁越远. By means of numerical simulation, X-ray diffraction, scanning electron microscopy and field measurement, the variation characteristics of bearing pressure in front of mining face under different mining depth and mining thickness in Lianghuai mining area were studied.The results showed that the ultra-shallow wind oxidation zone mining , Rock tends to decrease in strength and plastic deformation due to sedimentary water environment and weathering. The pressure shows a tendency of large static pressure, small dynamic pressure, and small dynamic load coefficient. When the rock is mined at a conventional depth, the elastic deformation capability of the rock increases, The peak pressure of supporting pressure also increases with the increase of mining depth and the peak pressure concentration coefficient increases. When the mining goes deep, due to the influence of high temperature and high ground pressure, the rock strength decreases, the plastic deformation capacity increases, the peak pressure of supporting pressure increases, However, the peak pressure concentration coefficient shows a downward trend, and the rock formations gradually show viscoplastic deformation. As the thickness of the coal seam increases, the peak concentration coefficient of supporting pressure in front of the stope decreases, and the peak farther away from the coal wall.