石材矿山地下采场结构参数及稳定性研究

发布时间：2018-01-14 02:05

本文关键词：石材矿山地下采场结构参数及稳定性研究　出处：《西南科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着我国石材产量与销售量的不断攀升,适合露天开采的石材矿山将逐渐减少,而地下石材矿山必将逐渐兴起,但由于目前地下石材开采没有明确的规范以及可供参考的合理采场结构参数,这严重制约着石材地下开采行业的发展。因此,进行地下石材开采采场结构参数及其稳定性的研究对于拓展石材行业地下开采,确保矿山安全、高效、经济地开采地下矿产资源,减少地下开采灾害事故的发生以及编制石材地下开采结构参数的规范皆具有重要意义。为合理的确定地下石材矿山的采场结构参数,本文基于亿隆地下大理石饰面石材矿山,针对该石材矿山的地质条件及矿岩物理力学参数,采用理论计算及类比法初步确定采场结构参数中的矿房跨度、顶板厚度、采场高度及矿柱宽度的取值。而后应用FLAC3D软件并结合正交试验方法对采场结构参数进行进一步优化,该法选取顶板位移、底板位移、最大压应力、最大拉应力、塑性区体积及矿石回收率6个指标作为正交试验的6个评价指标,对影响采空区稳定性的各种因素进行了综合指标评价及敏感度分析。研究得出:采场跨度对采场稳定性的影响最大,采场高度和顶板厚度对采场稳定性的影响次之,矿柱宽度影响最小;通过对正交模拟实验结果进行分析,推荐亿隆矿山采用矿房跨度8m,顶板厚度6m,采场高度16m,矿柱宽度6m的采场结构参数,以保证采矿的安全,同时为地下石材矿山采场结构参数设计提供参考。
[Abstract]:With the increasing production and sales of stone materials in China, the number of stone mines suitable for open-pit mining will gradually decrease, while the underground stone mines will rise gradually. However, the development of underground stone mining industry is seriously restricted by the lack of clear specifications and reasonable stope structure parameters for reference at present. The study of stope structure parameters and its stability in underground stone mining is helpful to expand underground mining in stone industry and to ensure safe, efficient and economical mining of underground mineral resources. It is of great significance to reduce the occurrence of underground mining accidents and to compile the structural parameters of underground mining of stone. Based on the Yilong underground marble veneer stone mine, according to the geological conditions and the physical and mechanical parameters of the quarry rock, the span of the stope structure parameters is preliminarily determined by theoretical calculation and analogy method. The thickness of roof, height of stope and width of pillar are selected. Then the structural parameters of stope are further optimized by using FLAC3D software and orthogonal test method. The roof displacement and floor displacement are selected by this method. The maximum compressive stress, the maximum tensile stress, the volume of plastic zone and the recovery rate of ore are used as the six evaluation indexes of orthogonal test. The comprehensive index evaluation and sensitivity analysis of various factors affecting the stability of the goaf are carried out. The results show that the stope span has the greatest influence on the stope stability. The influence of stope height and roof thickness on stope stability is second, and pillar width is the least. By analyzing the results of orthogonal simulation experiment, it is recommended that Yilong mine should adopt stope structure parameters with a span of 8m, roof thickness of 6m, stope height of 16m and pillar width of 6m, so as to ensure the safety of mining. At the same time, it provides a reference for the design of stope structure parameters in underground stone mines.
【学位授予单位】：西南科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD872

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