大黄山煤矿大跨度切眼锚杆锚索支护技术研究

发布时间：2018-06-18 09:56

本文选题：大跨度切眼 + 锚杆锚索支护　；参考：《西安科技大学》2015年硕士论文

【摘要】：随着锚杆支护技术在大黄山煤矿的应用与发展,锚杆支护已在大黄山煤矿的巷道支护中占据绝对优势,然而,单纯的锚杆支护还不能很好的解决大黄山煤矿中大煤层大跨度切眼的支护难题。新疆大黄山煤矿中大煤层切眼宽8m,高3m,煤层厚度25.12m,煤层较软,能否解决好中大煤层大跨度切眼的支护难题,是大黄山煤矿扩大开采规模和保证安全生产的关键。本文对锚杆锚索的悬吊、组合梁和松动圈等支护理论以及锚杆锚索的失稳机理作了较为全面的分析,通过等效椭圆的方式和弹塑性极限平衡理论研究了大跨度矩形切眼围岩的塑性区范围。在分析现有设计方法的基础上,选用基于巷道围岩松动范围的锚杆锚索动态设计方法。最后以大黄山煤矿+708—+750中大煤层大跨度切眼锚杆锚索支护为工程项目,进行了大跨度切眼锚杆锚索支护技术的实践研究。通过对比本文选用的动态设计方法和传统的设计方法,确定了大黄山煤矿+708-+750中大煤层大跨度切眼锚杆锚索支护方案,并采用有限差分软件FLAC-3D对支护效果进行了稳定性分析;初始设计应用于实践,监测支护效果,采用数据处理软件对监测数据进行了分析,评价了支护效果,反馈信息后再优化设计,实现了初始设计与工程生产实践结合的动态设计。本文所采用的支护参数计算理论较好地解决了大黄山煤矿+708—+750中大煤层大跨度切眼锚杆锚索支护的技术难题,可供相似切眼设计参考。
[Abstract]:With the application and development of bolt support technology in Dawangshan Coal Mine, bolt support has occupied an absolute advantage in the roadway support of Dawangshan Coal Mine. However, The simple bolt support can not solve the problem of long span hole cutting in middle and large coal seam of Dawangshan Coal Mine. The cut hole width of middle and large coal seam is 8 m, the height is 3 m, the thickness of coal seam is 25.12 m, and the coal seam is soft. It is the key to enlarge the mining scale and ensure safe production to solve the support problem of large span cut hole in middle and large coal seam in Xinjiang Dawangshan Coal Mine. In this paper, the suspension of anchor cable, the supporting theory of composite beam and loose ring, and the mechanism of instability of anchor cable are analyzed comprehensively. By means of equivalent ellipse and elastic-plastic limit equilibrium theory, the range of plastic zone of surrounding rock with large span rectangular cut hole is studied. Based on the analysis of the existing design methods, the dynamic design method of anchor cable based on the loose range of roadway surrounding rock is selected. Finally, with the large span bolt and cable support in 708-750 medium and large coal seam of Dawangshan Coal Mine as the engineering project, the practical research on the support technology of large span cut hole bolt and cable is carried out. By comparing the dynamic design method and the traditional design method, this paper determines the support scheme of bolt in 708-750 medium and large coal seam, and analyzes the stability of the support effect by using FLAC-3D. The initial design is applied in practice to monitor the support effect. The data processing software is used to analyze the monitoring data, evaluate the support effect, and then optimize the design after feedback information, and realize the dynamic design which combines the initial design with the engineering production practice. The calculation theory of supporting parameters adopted in this paper has solved the technical problem of bolting cable support of large span and long span cutting bolt in 708-750 medium and large coal seam of Dawangshan Coal Mine, which can be used as a reference for similar cutting design.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

【相似文献】