小康矿极软岩回采巷道快速成巷技术研究

发布时间：2018-07-03 20:55

本文选题：极软岩 + 快速成巷技术　；参考：《辽宁工程技术大学》2015年硕士论文

【摘要】：小康矿自建井以来,出现了翻修次数多、范围广、掘进速度慢、采掘失调等成巷难题。造成巷道的掘进、支护、运输困难,巷道事故频发,安全生产环境越来越差,给矿井正常的安全高效生产造成了严重的困扰。导致生产成本增加,在相当一段时间内,小康矿处于严重亏损状态。成巷难题成为小康矿发展的瓶颈。因此,如何解决小康矿极软岩快速成巷的难题关系到该矿能否进行正常的安全生产。为解决小康矿成巷难,运用理论分析、数值模拟和工业试验等手段,提出了极软岩快速成巷技术；通过软岩分类多项指标分析,确定了围岩分类为极软岩；采用多点位移计,获得了小康矿松动圈半径；分析巷道失稳特点,得出了小康矿极软岩失稳的影响因素；采用岩石力学和理论力学,建立了围岩力学模型,获得了围岩的各区半径,确定了支护范围；运用关键部位耦合支护理论,得出原有巷道支护失稳的原因,确定了全断面锚网索耦合支护技术,采用FLAC~(3D)验证了方案的可行性；分析了影响圆形巷道综掘机选型因素,确定了可施工圆形巷道EBZ160C综掘机,健全了该综掘机相应配套设施。运输顺槽工业试验效果表明：各项监测指标确定围岩得到有效控制,综掘速度较原有光面爆破提高了50%。小康矿极软岩快速成巷技术解决了困扰该矿支护难、掘进速度慢和安全系数低的问题,对于地质条件相似矿井可以推广使用。
[Abstract]:Since self - construction of Xiaokang Mine , there have been many problems such as many times of renovation , wide range , slow driving speed , etc . It has caused serious trouble to the development of Xiaokang Mine .
Based on the analysis of soft rock classification , it is determined that the surrounding rock is very soft rock .
Using the multi - point displacement meter , the radius of the loose ring of the Xiaokang Mine is obtained .
Based on the analysis of the characteristics of roadway instability , the factors affecting the stability of the soft rock of Xiaokang Mine are obtained .
The rock mechanics and theoretical mechanics are used to establish the mechanical model of the surrounding rock , and the radius of each region of the surrounding rock is obtained , and the supporting range is determined ;
Based on the theory of the coupled support of the key parts , the reasons for the instability of the original roadway support are obtained , and the full - section anchor mesh cable coupling support technology is determined , and the feasibility of the scheme is verified by using FLAC ~ ( 3D ) .
This paper analyzes the factors influencing the selection factors of the fully mechanized coal mining machine in circular tunnel , and determines the corresponding supporting facilities of the fully mechanized coal mining machine . The test results show that the monitoring indexes determine the effective control of the surrounding rock , and the mining speed is improved by 50 % compared with that of the original smooth blasting . The technology of quick forming of the soft rock in the Xiaokang Mine solves the problems that the mine support is difficult , the tunneling speed is slow and the safety factor is low , and can be popularized and used for similar mines with similar geological conditions .
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

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