【作者】 李坤；

【导师】 华心祝；

【作者基本信息】 安徽理工大学 ， 矿业工程， 2015， 硕士

【摘要】 随着任楼矿的不断开采,部分回采巷道的巷道围岩产生大变形甚至破坏,严重影响了工作面的正常回采。本文通过现场调研搜集了7条回采巷道的地质条件、支护方式和支护效果等资料,综合分析并总结了任楼矿回采巷道的破坏原因。通过计算得出的聚类中心值,经过构造单项指标的隶属函数、计算模糊关系矩阵、模糊综合评价等,确定了任楼矿回采巷道的围岩稳定性分类。然后运用FLAC3D对3种不同支护方案下的支护效果进行数值模拟,选择出最合理的支护方案。最后进行现场工程实践,检测所选择的支护方案是否准确、合理。研究表明,由于任楼矿回采巷道地质条件和所受采动影响的不同,不同的回采巷道应采取不同的支护方式。通过对7259机巷进行模糊聚类分析得出,该巷道属于第Ⅳ类巷道。然后对其进行数值模拟研究得出,通过增加支护强度能够很好地控制围岩体的变形,保证巷道的稳定性。通过三个支护模拟方案的比较可以知道,在方案二支护条件下,巷道的变形得到了有效的控制,巷道顶底板最大移近量为168mm,巷道两帮最大移近量为108mm,相对于方案一支护条件下的变形来说得到了很大的减小。巷道的顶板中部和巷道的巷角部分是主要的应力集中部位,也是支护的关键部位。对于部分支护困难的区域,可以采用方案三的支护方式进行支护。最后将本文所提出的支护方案,在任楼矿的回采巷道中进行工程实践。结果表明这种支护方案能够很好的解决现场所出现的支护问题,巷道的围岩变形得到了很好的控制,满足了巷道的支护要求,为今后任楼矿相似地质条件下的回采巷道的围岩治理提够了一定的参考依据。更多还原

【Abstract】 With the continuous exploitation of Renlou mine, part of roadway surrounding rock of roadway, produce large deformation or damage, seriously affected normal mining working face. This article through the field survey to collect the article7of the geological conditions of roadway, supporting mode and supporting effect etc, comprehensive analysis and sums up the damage reason of the Renlou mine roadway. Clustering center of the calculated value, through constructing the membership function and calculation of monomial index fuzzy relationship matrix, fuzzy comprehensive evaluation, determine the Renlou mine stope stability classification of surrounding rock of roadway. Then using the FLAC3D to3kinds of supporting effect is numerically simulated under different support scheme, selecting the most rational support plan. The on-site engineering practice, the detection of the selected support scheme is accurate and reasonable.Research shows that, as a result of Renlou mine roadway, geological conditions and is affected by mining is different, different extraction roadway should adopt different ways of support. Through fuzzy cluster analysis was carried out on the7259machine lane, the roadway as part of the first Ⅳ roadway. Then carries on the numerical simulation study, by increasing the support strength can effectively control the deformation of the rock can guarantee the stability of roadway. Through the comparison of three simulation scheme of can know, in the second scheme supporting conditions, roadway deformation has been effectively controlled, roof and floor of roadway maximum nearer to168mm, maximum nearer to108mm of two sides of roadway, relative to the plan a support under the condition of deformation for get much smaller. Corner of the lane roadway roof of roadway and central part is the main stress concentration area, also is the key part of supporting. For some supporting difficult area, can use three support manners. Finally will support scheme, this paper in office building ore extraction roadway in engineering practice. Results show that the support scheme can well solve the problem of the field of supporting, the surrounding rock deformation of roadway are well control, meet the needs of roadway support for the future of Renlou mine, the geological conditions of extraction roadway surrounding rock governance may offer the reference basis.更多还原