摘要
急倾斜煤层矸石充填开采可以有效的抑制煤层及顶底板动力现象,有利于提高“支架-围岩”系统稳定性。在对急倾斜煤层矸石充填开采围岩移动变形的影响因素分析的基础上,运用UDEC数值模拟软件,对不同煤层倾角、埋深、充填率和充填体强度条件下,围岩的运移规律进行了研究。研究表明:随着煤层倾角的增加,顶板变形量和扰动范围减小,而底板移动变形逐渐增加;埋深越深,围岩的应力集中程度和最大下沉值越高;随着充填率和充填体强度的增加,采场围岩的移动变形量减少,稳定性增强。该研究可以为急倾斜煤层安全高效开采提供借鉴。
Steeply inclined coal seam rock backfill mining can effectively restrain the dynamic phenomena of coal seam and roof and floor,and improve the stability of support-surrounding rock system.Based on the influencing factors analysis of surrounding rock movement and deformation,the migration law of surrounding rock under different coal seam dip angle,buried depth,filling rate and filling strength conditions is studied,using UDEC numerical simulation software.The results show that with the increase of coal seam dip angle,the deformation and disturbance range of roof decreases,while the displacement deformation and failure of floor increases gradually;the stress concentration and maximum subsidence value of surrounding rock is positively related to the burial depth;with the increase of filling rate and filling strength,the displacement deformation amount of surrounding rock decreases and the stability increases.This study can provide references for safe and efficient mining of steeply inclined coal seam.
作者
吕文玉
曹文杰
高梓轩
于健浩
杜旭峰
LV Wen-yu;CAO Wen-jie;GAO Zi-xuan;YU Jian-hao;DU Xu-feng(Key Laboratory of Western Mine Exploitation and Hazard Prevention of Ministry of Education,Xi’an University of Science and Technology,Xi’an 710054,China;School of Energy Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China)
出处
《煤炭工程》
北大核心
2019年第12期111-115,共5页
Coal Engineering
基金
国家自然科学基金(51974226、51604212)
陕西省自然科学基础研究计划项目(2019JM-351)
关键词
急倾斜煤层
矸石充填
围岩运移
数值模拟
steeply inclined coal seam
waste rock backfilling
surrounding rock migration
numerical simulation
