复杂结构煤层支架-围岩关系研究  

Study on the Relationship between Support and Surrounding Rock of Complex Structure Coal Seam

作　　者：周焱 ZHOU Yan(Province and MOE Joint Key Lab of Mine Safety and High Efficient Mining,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南232001

出　　处：《煤》2022年第6期4-6,27,共4页Coal

基　　金：国家自然科学基金资助项目(51174255)。

摘　　要：为研究复杂结构煤层支架与围岩间的关系,以淮北袁店一矿821综放工作面为研究背景,采用数值模拟和现场实测对液压支架所受载荷、围岩变化特征进行研究。结果表明,通过FLAC^(3D)与Midas模拟了支架在不同夹矸厚度下的应力变化情况,得出支架在2 m、3 m、4 m夹矸厚度时所受最大主应力分别为35.1 MPa、31.8 MPa、26.3 MPa,呈现出逐渐变小的趋势,支架所受最大主应力随着夹矸厚度的增大而逐渐减小;此外,顶板的破坏高度随着夹矸厚度的增大而逐渐减小,夹矸厚度为2 m、3 m、4 m时支架上方顶板的破坏高度分别为27.3 m、23.8 m、18.6 m;通过现场实测可得,在工作面推进过程中,工作面来压强度整体呈现出中部区域大于上、下部区域的特征,为类似煤矿提供相应的技术支持。In order to study the relationship between support and surrounding rock in complex structure coal seam,taking 821 fully mechanized top coal caving face of Yuandian No.1 Coal Mine in Huaibei as the research background,this paper studies the load of hydraulic support and the variation characteristics of surrounding rock by numerical simulation and field measurement.The results show that the stress changes of the support under different gangue thickness are simulated by FLAC^(3D) and Midas.It is concluded that the maximum principal stress of the support at 2 m,3 m and 4 m gangue thickness is 35.1 MPa,31.8 MPa and 26.3 MPa respectively,showing a gradually decreasing trend.The maximum principal stress of the support decreases gradually with the increase of the thickness of gangue.In addition,the failure height of roof decreases with the increase of gangue thickness,when the thickness of gangue is 2 m,3 m and 4 m,the failure height of the roof above the support is 27.3 m,23.8 m and 18.6 m respectively.According to the field measurement,in the process of advancing the working face,the compressive strength of the working face shows the characteristics that the middle area is larger than the upper and lower areas,which provides corresponding technical support for similar coal mines.

关 键 词：复杂煤层 支架-围岩关系 数值模拟 支架适应性 

分 类 号：TD323[矿业工程—矿井建设]