特厚煤层仰采综放工作面过断层应力分布与围岩控制

发布时间：2018-06-15 19:04

本文选题：仰采综放工作面 + 过断层　；参考：《煤炭科学技术》2017年02期

【摘要】：针对特厚煤层仰采综放工作面过断层时煤壁片帮及冒顶严重、围岩难以控制的问题,结合济宁二号煤矿10301工作面地质条件,采用理论分析的方法得出工作面过断层时要采取的合理措施,并通过数值模拟方法得出工作面过断层时的应力、塑性区演化规律。结果表明:仰采工作面过断层时超前15 m破底、下扎角为11°的方式推过F49断层最为合理;工作面推进至断层35 m时,超前支承应力峰值逐渐增大并向煤壁侧靠近,易造成煤壁片帮;与此同时,断层活化程度逐渐增强,基本顶超前垂直应力峰值增加,周期来压步距减小,顶板不易控制;当工作面推进至断层15 m时,工作面上方岩层塑性区开始逐渐导通断层,直至揭露断层时完全导通,研究结果提出了加强放煤控制、顶板管理措施,能确保10301工作面顺利通过断层。
[Abstract]:In view of the serious wall and roof fall and the difficult control of surrounding rock when the fully mechanized top-coal caving face passes through the fault, the geological conditions of No. 10301 face in Jining No. 2 Coal Mine are considered. The reasonable measures to be taken when working face crossing faults are obtained by using the method of theoretical analysis, and the evolution law of stress and plastic zone is obtained by numerical simulation method. The results show that it is most reasonable to push F49 fault 15 m ahead of the fault and 11 掳below the bottom when the face passes through the fault, and the peak value of the leading support stress increases gradually and approaches to the coal wall when the working face advances to the fault 35 m. At the same time, the activation degree of the fault increases gradually, the peak value of vertical stress in advance increases, the interval of periodic pressure is reduced, and the roof is not easy to control. When the working face advances to the fault 15 m, The plastic zone of the rock layer above the working face begins to conduct faults gradually until the fault is exposed. The research results suggest that strengthening coal caving control and roof management measures can ensure the smooth passage of the 10301 face through the fault.
【作者单位】：重庆大学资源及环境科学学院;中国矿业大学煤炭资源与安全开采国家重点实验室;
【基金】：高等学校博士学科点专项科研基金新教师类资助项目(20120095120017)
【分类号】：TD323

【相似文献】