煤矿安全2024，Vol.55Issue(6)：176-183,8.DOI:10.13347/j.cnki.mkaq.20231577
基于回转下沉量的导水裂隙带发育高度预测
Prediction of development height of water-conducting fracture zone based on rotational subsidence
摘要
Abstract
The development height of water-conducting fracture zone(WCFZ)is an important parameter for water disaster treatment in coal mine roof.In this paper,the failure process of mining overlying rock is analyzed,and the rock instability failure in the frac-ture zone is divided into three stages:vertical fracture formation,masonry structure formation and gyratory instability;a mechanical model of vertical cracks and gyration subsidence is established.On this basis,the maximum subsidence of vertical cracks and gyra-tion instability is analyzed to judge the rock failure.The rock stratum with gyration subsidence value between these two stages forms a stable masonry beam structure,and a new method for calculating the height of WCFZ is obtained.Taking the 2201 working face of Yingpanhao as an example,the height of the WCFZ is predicted by theoretical method and numerical simulation.By comparing with the field measured data,the theoretical calculation(123.3 m)and numerical simulation results(132 m)are close to the measured data(115.5 m),which verifies the rationality of the proposed method.关键词
导水裂隙带/关键层/回转下沉量/防治水/岩层破坏Key words
water-conducting fracture zone/key layer/rotary sinking/water diaster treatment/strata damage分类
矿业与冶金引用本文复制引用
谢道雷,江兴洪,韩承豪,王凯,尹会永,闫久雷..基于回转下沉量的导水裂隙带发育高度预测[J].煤矿安全,2024,55(6):176-183,8.基金项目
国家自然科学基金资助项目(41702305) （41702305）
