褶曲翼部沿空巷道诱发冲击机理的倾角渐变效应研究
投稿时间:2019-06-20  修订日期:2019-09-06  点此下载全文
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作者单位E-mail
江丽丽 重庆工程职业技术学院 lmdou55@163.com 
杨增强 中国矿业大学北京能源与矿业学院  
翟春佳 中国矿业大学北京能源与矿业学院  
李常浩 潞安集团 余吾煤业有限公司  
基金项目:“十三五”重点研发计划(2016YFC0801404);国家自然科学(51874292, 51574243)
中文摘要:针对宝积山矿七采区工作面沿空巷道冲击地压显现频发问题,通过现场调研、理论分析、数值模拟和现场试验等方法,对沿空巷道诱发冲击机理的倾角渐变效应进行了研究,结果表明:随着煤层倾角减小,处于采空区下侧的支承压力增大,而处于采空区上侧的支承压力减小;随着煤层倾角从45°向0°变化时,沿空巷道实体煤侧在倾角30°时出现L形应力集中区,且应力集中程度越来越高。沿空巷道超前段极易在动静组合作用下诱发冲击地压,提出了大直径钻孔联合高压注水卸压和加强支护协同控制技术,并进行现场应用,电磁辐射监测结果表明卸压及控制效果明显。
中文关键词:冲击地压  倾角变化  沿空巷道  协同控制  电磁辐射
 
Study on Inclination Gradient Effect of Impact Mechanism Induced by Gob-side Roadway with Folded Wings
Abstract:Aiming at the frequent occurrence of rock burst along goaf roadway in No. 7 mining area of Baojishan Coal Mine, the gradient effect of impact mechanism induced by goaf roadway is studied by means of field investigation, theoretical analysis, numerical simulation and field test. The results show that with the decrease of coal seam dip, the support pressure at the lower side of goaf increases, while the support at the upper side of goaf increases. The pressure decreases; with the change of coal seam dip angle from 45 to 0 the L-shaped stress concentration area appears in the solid coal side of goaf roadway at 30 dip angle, and the stress concentration degree becomes higher and higher. The leading section of gob-side roadway is very easy to induce rock burst under the combined action of dynamic and static. The technology of large diameter borehole combined with high pressure water injection and pressure relief and strengthening support cooperative control are put forward and applied in the field. The results of electromagnetic radiation monitoring show that the pressure relief and control effect is obvious.
keywords:rockburst  inclination change  gob-side roadway  cooperative control  electromagnetic radiation
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