摘要
为了研究大倾角坚硬顶板厚煤层矿压显现规律,应用RFPA数值计算软件对大倾角坚硬顶板厚煤层顶煤的运动规律、顶底板的跨落规律及变形位移情况进行了模拟。得到主要结论为:大倾角煤层沿倾斜方向采场上覆岩层的移动和变形破坏特征是不对称的;上覆岩层在法向载荷的作用下普遍产生挠曲变形,变形规律为采场中上部下沉量较大,采场下侧下沉量较小;直接顶初次跨落步距约30 m;老顶初次来压步距约60 m,周期来压步距18～22m。
The law of rock pressure, the law of top coal drop dynamics and the law of roof fall,and high angle thick coal seam were researched with the RFPA numerical calculation software. The main results as follows： The overlying strata in stope＇s motion and deformation-destruction characters of high angle coal seam are anisomerous; The overlying strata engendered flexural deformation under normal loading, the deformation law is that the upper settlement quantity is larger than the bottom; The immediate roof first weighting pace is 30m; The main roof first weighting pace is 60m and the periodic weighting pace is 18-22m.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2009年第A02期4-6,共3页
Journal of Liaoning Technical University (Natural Science)
关键词
大倾角厚煤层
坚硬顶板
矿压规律
数值计算
high angle thick seam coal： strong roof strata： rock pressure laws
numerical calculation
