浅埋煤层垂向重复采动下地表移动规律实测研究  

Study on site measurement of surface movement law under shallow depth coal and vertically repeated mining

作　　者：陈盼[1,2] 谷拴成[1] 张幼振 

机构地区：[1]西安科技大学,陕西西安710054 [2]中煤科工集团西安研究院有限公司,陕西西安710077

出　　处：《煤炭科学技术》2016年第11期173-177,共5页Coal Science and Technology

基　　金：国家自然科学基金资助项目(41272181;41402134);国家科技重大专项资助项目(2011ZX05038-001)

摘　　要：为了研究重复采动下地表移动规律及其和常规工作面地表移动规律的差异性,通过对陕西煤业集团神木柠条塔煤矿N1200工作面地表移动规律的现场实测,对比该工作面覆岩中无采空区与有采空区的地表移动参数的不同之处,并利用相关岩层移动理论解释了重复采动下地表移动规律存在差异性的原因。结果表明:重复采动下该工作面地表下沉系数为0.877,超前影响角为49.4°,综合移动角60°,拐点偏移距12.5 m。相比较同条件下的常规工作面,重复采动影响下地表移动下沉系数较大;超前影响角、移动角、拐点偏移距较小;水平移动系数基本相同。In order to study the difference between the surface movement law under repeated mining and the surface movement law of the conventional coal mining face, with the site measurements of the surface movement law of No.N1200 coal mining face in Shenmu Ningtiaota Mine of Shaanxi Coal Industry Group ,the paper compared the differences of the surface movement parameters for the overburden strata with no goaf and goaf above the coal mining face.The related strata movement theory was applied to explain the causes of the differences existed in the surface movement law under repeated mining.The results showed that the surface subsidence coefficient of coal mining face under repeated mining was 0.877 ,the advance influence angle was 49.4° ,the comprehensive movement angle was 60° and the offset distance at a turning point was 12.5 m.In comparison with the conventional coal mining face under the similar condition, the surface subsidence coefficient under repeated mining influences was higher.The advance influence angle, movement angle and offset distance at a turning point were low and the horizontal movement coefficients were same basically.

关 键 词：地表移动 浅埋煤层 重复采动 近距离煤层 采空区 

分 类 号：TD167[矿业工程—矿山地质测量]