厚煤层大倾角煤顶下掘进围岩控制数值模拟研究  

Study on the Numerical Simulation of Surrounding Rock Control Mechanism of Driving Under Thick Coal Roof with Large Dip Angle

作　　者：高建华 庞现军 GAO Jianhua;PANG Xianjun(Huaibei Qingdong Coal Industry Co.,LTD.,Huaibei Anhui 235143,China)

机构地区：[1]淮北青东煤业有限公司,安徽淮北235143

出　　处：《科技和产业》2022年第9期294-300,共7页Science Technology and Industry

摘　　要：为研究大倾角煤层开采过程中巷道围岩的稳定状况,以青东矿837机、风巷为工程背景,进行煤层顶底板岩石力学参数实验室测试,利用FLAC^(3D)软件建立不同掘进工艺条件下的数值计算模型,分析软弱特厚煤层巷道分别在跟顶板掘进、全煤层掘进、破底掘进(不同破底深度)条件下巷道围岩破坏范围和变形特征。结果表明:跟顶板掘进方式下,围岩的塑性破坏主要发生在巷道底板下方,需要特别注意加强对底板的支护;跟底板掘进时,底板中部靠近帮脚处产生严重底鼓,应当加强对帮脚和巷帮的支护;在全煤层掘进时,巷道主要变形为底鼓与顶板下沉,顶底板破坏严重。研究成果对于指导大倾角厚煤层开采围岩控制具有一定的理论与工程意义。In order to study the stability of surrounding rock of roadway in the mining process of large dip Angle coal seam,the mechanical parameters of roof and floor of coal seam were tested in laboratory with 837 machine and wind tunnel in Qingdong Mine as engineering background.FLAC^(3D) software was used to establish the numerical calculation model under different tunneling technology conditions,and the failure range and deformation characteristics of surrounding rock in weak and extra thick coal seam roadway were analyzed under the following roof tunneling,full coal seam tunneling and bottom tunneling(different bottom tunneling depth)conditions.The results show that the plastic failure of surrounding rock mainly occurs at the bottom of roadway floor,and special attention should be paid to the support of floor.When tunneling with bottom slab,there is serious floor heave in the middle of bottom slab near the side foot,so the support of side foot and side wall should be strengthened.In the whole coal seam tunneling,the main deformation of roadway is floor heave and roof subsidence,and the roof and floor are seriously damaged.The research results have certain theoretical and engineering significance for guiding the control of surrounding rock in mining of thick coal seam with large dip angle.

关 键 词：厚煤层掘进 掘进工艺 实验室测试 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]