煤矸石和破碎压密作用机制研究

通过特殊压密试验探讨了煤矸石压密性与矸块破碎关系。试验结果反映出煤矸石的压密性与一般的压密性有实质差异,压密过程中较大比例的软岩矸块出现碎碎,并伴随有密实程度和颗粒级配的明显变化。根据试验所反映的煤矸石压密前后颗粒级配的变化及压密过程的压力－密度关系特点,将煤矸石的压密过程分为破碎压密和固结压密两个阶段,认为破碎压密是固结压密的预压密过程,其重要作用在于有效改善了煤矸石所存在的颗粒级配缺从而改善其固结压密性。     

岩石在伺服条件下的渗透性与应变、应力的关联性特征

根据伺服渗透试验所获得的渗透率－应变关系与应力－应变关系，分析了全应力－应变过程中岩石渗透性随变形的变化特点及软、硬岩渗透率－应变关系的主要差异和渗透率－应力之间的关联性，对破坏前的岩石渗透率－应力关系所作的耦合结果表明：对于峰值应力前的变形段，不同岩性的渗透率－应力关系曲线表现有相近的几何特征，且二者的对应性和分段规律十分明显。基于这种特点，提出了临界抗渗强度和起始渗透率两个特征值，建立了峰值应力前岩石渗透性－应力关系数学表达式，并阐述了这两处特征参数的物理意义和工程意义。     

Study of Fussy Clustering of Engineering Geological Environment with GIS

Based on previous evaluating methods, a new method which combines GIS with Fussy Clustering algorithm is proposed and applied in evaluating the engineering geological environment of the research area of XuZHou City in this paper. By analyzing the characteristics and formation of engineering geological environment, the major problems are discussed, including stability of basement rock, sandy soil liquefaction and cultural stratum. According to effecting factors of these problems, the stability of every engineering geological problem in the worked area is classified into different classes. Then, the Fussy Clustering method is used in assessing all conditions of engineering geological environment. Finally, the evaluation is fulfilled in the whole studied area. The calculating result shows the method is feasible.