摘要
为确定田庄煤矿15上煤层开采覆岩导水断裂带的发育高度,以15101工作面为例,采用FLAC3D数值模拟软件建立采场模型,将应变能破坏准则作为导水断裂带扩展判据,从能量的角度确定断裂带塑性区发育范围,对矿井开采引起的煤层顶板覆岩运移规律进行模拟。提出基于应变能破坏准则判定数值模型塑性区范围的新方法,通过分析塑性区破坏范围,确定导水断裂带高度。并结合理论公式与井下现场观测对模拟结果进行验证。研究结果表明:以应变能破坏准则为判据,根据塑性区破坏范围得到上覆岩层导水断裂带数值模拟高度为22.8m,与理论计算导水断裂带高度上下限范围为14.4~27.3m和现场实测结果21.44m相比,该判据下所得结果与现场实测结果相接近,验证了应变能破坏准则所得导水断裂带高度的准确性。
In order to determine the development height of the overburden water flowing fracturing zone in the upper 15 coal seam of Tianzhuang Coal Mine,the 15101 working face is taken as an example.The FLAC3 Dnumerical simulation software is used to establish the stope model,and the strain energy failure criterion is used as the extension criterion of overburden water flowing fracturing zone.The development range of the fracture zone is determined by the strain energy failure criterion,and the numerical simulation of the overlying strata movement law of the coal seam roof caused by mine exploitation is carried out.A numerical simulation method based on the strain energy failure criterion for determining the plastic zone is proposed.By analyzing the damage range,the height of the overburden water flowing fracturing zone is determined.The results of theoretical and field observation are used to validate the simulation result.The height of the overburden water flowing fractured zone according to the numerical simulation result is 22.8 m.The theoretical calculations are from 14.4m to 27.3m and the field observation is 21.44 m.The result obtained by the strain energy failure criterion is closer to the field observations.The accuracy of the development height of the overburden water flowing fracturing zone obtained by the strain energy failure criterion is validated.
作者
李鹏
齐东河
耿从杰
王成功
黄刚
潘大益
张桐桐
LI Peng;QI Donghe;GENG Congjie;WANG Chenggong;HUANG Gang;PAN Dayi;ZHANG Tongtong(College of Mining and Safety Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Qingdao Founder Energy Co.,Ltd.,Qingdao 266520,China;Zhubai Coal Mine,Shandong Energy Linyi Group Co.,Ltd.,Tancheng 276112,China;Wanglou Coal Mine,Shandong Energy Linyi Group Co.,Ltd.,Jining 272000,China)
出处
《煤矿安全》
CAS
北大核心
2019年第10期34-39,共6页
Safety in Coal Mines
关键词
导水断裂带
数值模拟
应变能
塑性区
经验公式
现场实测
water flowing fracture zone
numerical simulation
strain energy
plastic zone
empirical formula
field observation
