摘要
为掌握综放工作面过地堑构造前后采场围岩状态变化,以34201综放工作面Fs27断层和Fs28为工程背景,采用FLAC3D数值模拟计算方法,计算分析了工作面推过地堑构造前后采场围岩的垂直应力、水平应力、最大主应力、剪应力,可以得出:断层的存在对工作面围岩应力状态影响较大,超前影响距离约为20m左右;断层附近的裂隙带发育高度较大,由拉应力和剪应力共同作用下的裂隙带高度最大可达80m左右,对上覆岩层导水影响较大。针对矿压显现规律与裂隙带发育规律提出过地堑构造的技术措施。
For mastering the changes of stope surrounding rock state before and after fully mechanized caving face passing by graben structure,taking fault FS27 and fault FS28 in 34201 working face as engineering background,using FLAC3D Numerical simulation calculation method,this paper calculated and analyzed vertical stress horizontal stress maximum principal stress shear stress of stope surrounding rock before and after fully mechanized caving face passing by graben structure,the following conclusion can be drawn： the existence of graben structure has a great influence on the stress state of surrounding rock,the advance influence distance is about 20 m; the fracture zone near fault is highly developed,the maximum height of fracture zone is about 80 m under the combined action of tensile stress and shear stress,it has great influence on overlying strata water transfer.According to law of strata behavior and the development law of fracture zone,the technical measures of passing by graben structure are put forward.
作者
师皓宇
田多
SHI Hao-yu TIAN Duo(School of Safety Engineering, North China Institute of Science and Technology, Yanjiao, 065201, China)
出处
《华北科技学院学报》
2017年第4期8-14,共7页
Journal of North China Institute of Science and Technology
基金
国家自然科学基金重点项目(51234005
51434006)
廊坊市科学技术研究与发展计划自筹经费项目(2016011035)
关键词
综放工作面
地堑构造
围岩应力
活化高度
Fully Mechanized Top Coal Caving Working Face
Graben Structure
Surrounding Rock Stress
Activated Height
