为了讨论配煤煤质和焦炭强度间的统计学关联性,选取配煤的煤质指标:灰分(Ad)、挥发分(Vdaf)、全硫(Std)、黏结指数(G)等为 自变量,以焦炭的强度指标:抗碎强度(M40)、耐磨强度(M10)、反应性指数(CRI)以及反应后强度(CSR)为因变量,采用SPSS软件对配煤煤质参数与焦炭强度相关性进行了多元线性回归分析,并完成了预测模型的构建.研究结果表明,此方法迅速且较为精确,适于焦炭质量预测和控制.

In order to accurately and effectively understand the mechanism of overlying strata movement with strip mining,this paper used the FLAC3D software to simulate the mechanism of goaf overburden deformation propagation of NO.12 seam by the recovery rate in different mining conditions,which is located in NO.12 mining area of the North of Xima coal mine,under the village of Xi Shanggangzi in Dengta,Liaoning.The vertical and horizontal displacement curves were obtained by setting measuring points of goaf overlying strata and the corresponding surface.The results of study show that with the recovery rate increases from 40％ to 50％,then to 60％,the maximum vertical displacement increment at mining goaf roof measuring point is 51.51mm and 119.56mm respectively,and the corresponding surface and the maximum vertical displacement increment is 17.38mm and 65.67mm respectively.The horizontal displacement is similar with the vertical displacement,but it is relatively small in the mining area;when the recovery ratio is constant in the same displacement observation lines,the corresponding measuring points displacement of roof in mined-out area is higher than that of coal pillar roof,and this elevation trend gradually weakens toward the surface.Finally,by fitting the relationship between the vertical displacement and the recovery ratio,this study obtained the maximum vertical displacements of goaf roof and the corresponding surface increase relation with the recovery ratio in the form of power function.

为了准确而有效的掌握条带开采上覆岩层移动机理,采用FLAC3D数值模拟软件,对辽宁省灯塔市西马煤矿北二采区西上岗子村下压12煤采空区上覆岩层变形传播机理进行研究.模拟研究表明,采用FLAC3D软件可以较好地模拟条带开采上覆岩层长期变形特征.通过对各采空区和煤柱顶板及对应地表布设位移测点,得到顶板和地表不同时间段的竖向位移变化曲线.研究结果经分析得到,煤层开采后采空区顶板在自重和上覆岩层作用下,短时间内变形状态仍有较大变化;开采后21个月,各采空区顶板沉降变形开始趋于稳定;24个月后各煤柱顶板沉降变形开始趋于稳定;27个月后地表沉降变形开始趋于稳定;最终,采空区上覆岩层应力分布重新达到平衡.

在分析了煤层地质条件的基础上,讨论了适合9号煤层的3种采煤方法,通过分析分层开采、大采高综采和综采放顶煤开采的优缺点及适应条件,确定了9号煤层采用综采放顶煤采煤方法,并结合沙基岩浅埋深煤层的矿压规律,探讨了回采工艺参数。开采实践证明采煤方法及工艺参数的选择较合理,开采效果较好,给准格尔矿区东部厚煤层开采提供了借鉴的经验。

针对大隆矿地下水水质特点,选用离子交换去除其中一些离子,主要为金属离子和氯离子,并对氯离子和铁离子进行去除实验,通过实验比较确定最佳方案.

针对大隆矿地下水水质特点,选择聚合硫酸铝(10mg/L)对其做了混凝试验的分析,确定了混凝试验中混凝剂的最佳投加量和最佳pH值,研究表明,用聚合硫酸铝做混凝剂时最佳投加量为4mL,最佳pH值=9。