采煤引起的地表下沉形态非对称性分析  

The Non-symmetric Shape of Surface Subsidence Caused by Mining

作　　者：于秋鸽 张华兴[1,2] 邓伟男[1,2] 邹友平[1,2] YU Qiuge1,2,ZHANG Huaxing1,2 , DENG Weinan1,2 , ZOU Youping1,2(1. Coal Mining and Design Branch, China Coal Research Institute, Beijing 100013, China;Coal Mining and Design Department, Tiandi Science and Technology Co. Ltd, Beijing 100013, Chin)

机构地区：[1]煤炭科学研究总院开采研究分院,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《山东科技大学学报（自然科学版）》2018年第4期42-48,共7页Journal of Shandong University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51604151)

摘　　要：大量现场实测表明,开采沉陷下沉盆地并不是关于采空区对称,而是开切眼一侧的地表下沉值普遍大于停采线一侧地表下沉值。为了分析地表下沉盆地非对称的原因,基于概率积分法地表下沉预计公式,将开切眼一侧的采动影响近似为多次重复采动,提出重复采动综合影响系数F概念,通过理论推导分析了地表下沉盆地非对称性产生的原因,并结合数值模拟和现场实例分析了重复采动综合影响系数F与采厚、采动程度之间的关系。研究结果表明:F随采厚的增加而减小,但F值恒大于0;F随采动程度的增加而增加,当采动程度达到一定值时,F值不再变化,但F值不再变化点不一定是由非充分采动到充分采动的过渡点。这对于合理解释某些特定地质条件下,地表下沉盆地的非对称性具有一定的借鉴意义。Many engineering practices showed that the surface subsidence value wasn＇t symmetric above the gob,but that,the value on the open-off cut side was always greater than that on the stopping line side.To analyze the reasons of asymmetry,the mining moves on the open-off cut side was treated as repeated mining and the concept of repeated mining comprehensive influence coefficient F was put forward based on the probability integral method for surface subsidence prediction.At the same time,the reasons of asymmetry were analyzed by theoretical derivation and the relationships between Fand mining height,between Fand mining degree were analyzed by numerical simulation and field tests.The results show that Fdecreases with the increase of mining height,but it is always bigger than 0,Fincreases with mining degree and it does not change when the mining degree has reached certain value,but the value is not necessarily the point from subcritical mining to sufficient mining.This study is of great significance for analyzing the non-symmetry of surface subsidence in certain geological conditions.

关 键 词：概率积分法 下沉盆地 重复采动 综合影响系数 非对称性 

分 类 号：TD327[矿业工程—矿井建设]