挤压构造应力及自重应力作用下的采煤沉陷对比实验  

Contrast Experiments of Coal Mining Subsidence under Influence of Compressive Tectonic Stress and Weight Stress

作　　者：孙学阳[1] 夏玉成[1] 

机构地区：[1]西安科技大学地质与环境工程系,陕西西安710054

出　　处：《矿业安全与环保》2010年第3期14-16,共3页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(40472104);陕西省自然科学基金项目(2009JM5001;009JQ5001)

摘　　要：对地质、采矿条件相同的2个模型,分别在受挤压构造应力和自重应力作用下,模拟由地下采煤引起的地表沉陷过程。模拟结果表明,在挤压构造应力和自重应力耦合作用下,煤层顶板移动出现较晚,地表移动变形范围较小,损害程度相对较弱;不计构造应力,模型只受自重应力作用时,煤层顶板移动出现较早,地表移动变形范围较大,损害程度相对较强烈。因此,煤矿区构造应力是采煤沉陷中不可忽略的影响因素,对井工开采过程中的地表环境损害有重要控制作用。The ground -surface subsidence process caused by coal mining was simulated with two models having the same geological and mining conditions respectively under the action of the compressive tectonic stress and weight stress. The test results showed that under the combined action of the compressive tectonic stress and weight stress, the collapse of the coal roof occurred later, the ground-surface movement and deformation were smaller and its damage degree was relatively weaker; when the model was only under the action of the weight stress, the results were contrary to those mentioned above. The conclusion was that the tectonic stress in a coal mining area was a non-negligable influence factor in the prediction of coal-mining subsidence, so it has an important control function for the the surface environment damage during underground coal mining.

关 键 词：挤压构造应力 自重应力 采煤沉陷 相似材料模拟 

分 类 号：TD315.3[矿业工程—矿井建设]