干河矿2#煤层旺采区围岩的物理力学特性测试

发布时间：2019-04-10 19:08

【摘要】：为了满足干河煤矿旺采试验区采场煤巷布置和支护设计需求,并对地下水防治提出相关技术措施,利用现场取样、电镜扫描(SEM)、X射线衍射(XRD)、力学试验等方法,对采场围岩矿物成分和力学参数进行了相关测试。根据钻孔取芯统计结果,顶底板平均岩石质量指标低于30%,围岩完整性差。XRD分析表明,砂质泥岩含黏土矿物总量约19%,黏土矿物主要成分为I/S混层和高岭土,相对含量达85%以上。SEM试验发现,围岩含溶蚀孔、层片状特征及大量的黏土矿物分布,需要加强地下水防治。力学测试结果表明,顶板砂质泥岩抗压强度离散性较大,顶板岩性不均,需要根据围岩性质及时调整锚杆支护设计。
[Abstract]:In order to meet the requirements of coal roadway layout and support design in Wangwang mining area of Ganhe Coal Mine, the relevant technical measures for groundwater prevention and control were put forward. The methods of on-site sampling, scanning (SEM), X-ray diffraction (XRD), mechanics test and so on were used. The mineral composition and mechanical parameters of the surrounding rock of the stope are tested. According to the statistical results of borehole coring, the average rock quality index of top and floor is less than 30%, and the integrity of surrounding rock is poor. XRD analysis shows that the total clay mineral content of sandy mudstone is about 19%, and the main composition of clay mineral is I S mixed layer and kaolinite. SEM tests show that the surrounding rock contains corrosion holes, lamellar characteristics and a large number of clay minerals distribution, so it is necessary to strengthen the prevention and control of groundwater. The mechanical test results show that the compressive strength of the top sand mudstone is discrete and the roof lithology is uneven. It is necessary to adjust the bolt support design in time according to the properties of the surrounding rock.
【作者单位】：中国矿业大学(北京)力学与建筑工程学院;中国矿业大学(北京)资源与安全工程学院;
【基金】：国家自然科学基金资助项目(51134025) 中央高校基本科研业务费专项基金资助项目(2010YL09)
【分类号】：TD315

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