山东煤炭科技2024，Vol.42Issue(8)：158-161,171,5.DOI:10.3969/j.issn.1005-2801.2024.08.031
非反应型材料对煤矿巷道围岩承载性能影响研究
Study on the Influence of Non Reactive Type Material on the Bearing Performance of Surrounding Rock in Coal Mine Roadway
李贤良 1赵冠南 1杨玉玉1
作者信息
- 1. 渭南陕煤启辰科技有限公司,陕西 渭南 714000
- 折叠
摘要
Abstract
Aiming at the problem of significant deformation during the stoping process of small coal pillar roadways in Jianxin Coal Mine,through revealing the principle of non reactive type material film formation and surface protection.Combined with uniaxial compressive test and FLAC3D numerical simulation method,the uniaxial compressive strength of samples before and after spraying,as well as parameters such as roadway surface displacement,stress,plastic zone,elastic potential energy and others,are studied.The results show that the average compressive strength of the sprayed samples increases by about 23%;The displacement amount of the simulated roadway roof and two sides decreases by 25%and 6%respectively,and the stress distribution of the surrounding rock becomes more balanced.The plastic failure mode and range change significantly,and the average strain energy increases from 7.8 J/m3 to 20.8 J/m3.On-site industrial tests are conducted on the small coal pillar roadway of Jianxin Coal Mine,compared with the unsprayed area,the displacement amount of the two sides of the roadway in the sprayed area decreases by 14%,the displacement amount of the roof and floor decreases by 18%,and the delamination amount decreases by 25%.The impact of non reactive type materials on the bearing performance of the roadway surrounding rock is mainly reflected in the slowing down effect of the tensile and bonding characteristics of the materials on the surface displacement of the roadway,thereby suppressing the movement of deep part base points,and has a certain supporting effect.关键词
煤矿/非反应型材料/位移/抗压强度/支护Key words
coal mine/non reactive type material/displacement/compressive strength/support分类
矿业与冶金引用本文复制引用
李贤良,赵冠南,杨玉玉..非反应型材料对煤矿巷道围岩承载性能影响研究[J].山东煤炭科技,2024,42(8):158-161,171,5.
