基于高密度电法的沉陷区地表裂隙演化特征试验研究  

Experimental Study on Surface Fissure Evolution Characteristics in Subsidence Area Based on High Density Electrical Method

作　　者：李娜娜 LI Nana(The Xinjiang Uygur Autonomous Region Institute of Surveying and mapping,Urumqi Xinjiang 830002,China)

机构地区：[1]新疆维吾尔自治区测绘科学研究院,乌鲁木齐新疆830002

出　　处：《北京测绘》2018年第9期1086-1091,共6页Beijing Surveying and Mapping

摘　　要：为研究煤层开采区开采厚度与拉张裂隙的分布及其演化特征之间的关系,在对开采造成的裂隙进行分类的基础上,针对拉张型裂隙,采用室外相似模拟实验研究不同开采厚度下拉张型裂隙的分布及其演化特征。研究表明,不同采厚模型垮落角变化不大,随着工作面的推进拉张裂隙经历了产生、发展和闭合三个动态过程;多时段跨孔监测表明,随煤层开采工作面推进,位于工作面两端的土层受到的扰动影响较大,裂隙宽度较大;随工作面推进裂隙发育个数发生变化,裂隙密度分布曲线表现两个阶段演化特征。To study the relationship between the mining thickness and the distribution of tensile cracks and the evolutionary characteristics in the coal mining area,based on the classification of fractures caused by mining,for the tensile cracks,an outdoor similar simulation experiment was used to study the distribution and evolution characteristics of tensile fractures of different mining thicknesses.Research shows that the caving angle of different mining thickness models has little change.Along with the advance of the working face,the tension crack has experienced three dynamic processes：the emergence,the development and the closure.Multi-time cross-hole monitoring shows that with the advancing coal seam working face,the soil layers at both ends of the working face are greatly affected by the disturbance,and the crack width is larger.The number of cracks developed along the work surface changes,and the fracture density distribution curve shows two stages of evolutionary characteristics.

关 键 词：相似模拟实验 拉张裂隙 开采厚度 高密度电法 演化特征 

分 类 号：P258[天文地球—测绘科学与技术] TD325[矿业工程—矿井建设]