煤炭与化工2023，Vol.46Issue(12)：1-5,5.DOI:10.19286/j.cnki.cci.2023.12.001
注浆钻孔围岩塑性区形态和弹性应变能量分布特征研究
Study on plastic zone morphology and elastic strain energy distribution characteristics of surrounding rock in grouting borehole
李洪蛟 1李臣 2张文龙3
作者信息
- 1. 煤炭科学技术研究院有限公司矿用材料分院,北京 100013||煤炭资源高效开采与洁净利用国家重点实验室,北京 100013||国家能源煤炭高效利用与节能减排技术装备重点实验室,北京 100013
- 2. 中国煤炭科工集团武汉设计研究院,湖北武汉 430064
- 3. 青岛黄海学院建筑工程学院,山东青岛 266555
- 折叠
摘要
Abstract
Underground grouting in coal mine can reinforce the surrounding rock and better ensure the safe production of coal mine.However,there is often no optimization method for the spacing design of grouting boreholes.In this study,by studying the distribution of plastic zone and the distribution characteristics and laws of elastic strain energy around grouting boreholes,an idea of determining the spacing design of grouting boreholes was obtained.The results show that the distribution of the plastic zone can provide a reference for the expansion channel of the slurry.When the shape of the plastic zone determined by the stress condition is butterfly,the interconnection between the butterfly leaves can be used as one of the principles for determining the spacing of grouting holes.The strain energy distribution cloud diagram of elastic-plastic medium is closely related to the distribution of plastic zone.When the pressure is applied to the surrounding rock through the grouting hole,the slurry is expanded along the direction of butterfly leaf with high probability as the channel of energy release.The change law of elastic energy is the same as that of plastic zone.When the butterfly plastic zone is formed,the storage strain energy of elastic-plastic model increases obviously,and the difference of elastic energy between pure elastic model and elastic-plastic model is large.In the design of grouting borehole spacing,the optimal spacing results can be obtained from the perspective of the connection of plastic zone and the release degree of elastic energy.This study provides a new method for determining the spacing of grouting boreholes by plastic zone distribution and elastic strain energy distribution.关键词
煤矿注浆/注浆钻孔设计/塑性区/弹性应变能Key words
coal mine grouting/grouting drilling design/plastic zone/elastic strain energy分类
矿业与冶金引用本文复制引用
李洪蛟,李臣,张文龙..注浆钻孔围岩塑性区形态和弹性应变能量分布特征研究[J].煤炭与化工,2023,46(12):1-5,5.
