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项目主要研究解决深部高应力条件特厚煤层综放开采全煤巷道支护问题。研究过程采用现场测试与数值模拟手段对围岩(煤)结构特征和应力状况进行分析和模拟,以其为依据,应用“动态信息设计法”进行巷道锚杆支护的设计和研究,借助工程监测、信息反馈修正和优化设计。在水平应力高(45MPa)、煤厚11m的带状煤柱条件下,采用高性能锚杆+锚索支护,设计呈平拱断面,利于施工和成形,注重锚杆与煤(岩)体的偶合支护作用,实现了巷道支护效果的改善,保持了巷道围岩体的稳定。
The project mainly studies and solves the problem of fully mechanized coal roadway supporting in fully mechanized top coal caving face in the deep high stressful conditions. In the research process, the structural characteristics and stress conditions of surrounding rock (coal) are analyzed and simulated by means of field test and numerical simulation. Based on the analysis, the design and study of roadway bolt support is carried out by using “dynamic information design method” With project monitoring, information feedback correction and optimization design. Under the conditions of high horizontal stress (45MPa) and coal thickness of 11m, a high-performance anchor + anchor cable is used to support the structure. The flat arch section is designed to facilitate construction and forming, and the anchor and coal (rock) body Of the coupling support role to achieve the roadway support effect to improve and maintain the stability of roadway surrounding rock mass.