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为了研究平顶山东部矿区地应力场特征,以及地应力对煤与瓦斯突出的影响,利用地应力实测资料,运用理论分析和数理统计计算相结合的方法,系统研究了东部矿区地应力的分布规律;并且进行了地应力区块划分,揭示了东部矿区地应力在突出中的作用。结果表明:1)东部矿区地应力场以水平构造应力为主,最大主应力方向为NEE-SWW向,最大水平主应力百米梯度为5.4 MPa左右,该区域内集聚了较高的水平构造应力,应力场类型为大地动力场;2)依据最大水平主应力随埋深增加而增大的应力梯度线,将东部矿区划分为应力升高区和应力梯度区;3)应力升高区由于地应力集中,提供了突出的动力,构造煤的发育则减少了突出阻力,造成了该区域频繁发生突出事故,突出的主导因素为地应力。
In order to study the characteristics of the in-situ stress field in the eastern Pingdingshan coal mines and the effect of the earth stress on the coal and gas outburst, the distribution rules of the in-situ stress in the eastern coal mines are systematically studied by using the measured data of the ground stress and the combination of theoretical analysis and mathematical statistics. And the division of geo-stress zones has been done, which reveals the role of in-situ stress in the eastern mining area. The results show that: 1) The horizontal tectonic stress is the dominant stress field in eastern mining area, the direction of maximum principal stress is NEE-SWW, and the maximum horizontal stress is about 5.4 MPa. There is a high level of horizontal tectonic stress And the type of stress field is the earth’s dynamic field. 2) The eastern mining area is divided into the stress increasing area and the stress gradient area according to the stress gradient line whose maximum horizontal principal stress increases with the buried depth; 3) Stress concentration, providing a prominent motive force, the development of tectonic coal has reduced the prominent resistance, resulting in the frequent occurrence of prominent accidents in the region, the dominant factor is highlighted as the geostress.