郭屯煤矿3303工作面断层防水煤柱留设研究  

Research on the Remaining and Setting of Fault Waterproof Coal Pillar in the 3303 Working Face of Guotun Coal Mine

作　　者：杭猛 Hang Meng(Linyi Mining Industry Group Heze Coal and Power Co.,Ltd.Guotun Coal Mine,Shandong Heze 274700)

机构地区：[1]临沂矿业集团菏泽煤电有限公司郭屯煤矿,山东菏泽274700

出　　处：《山东煤炭科技》2024年第9期158-163,共6页Shandong Coal Science and Technology

摘　　要：针对郭屯煤矿采动影响造成断层活化导通新近系含水层的问题,以3303工作面为研究背景,通过导水断层留煤柱理论计算得出煤柱留设宽度为47.66 m,在此基础上使用FLAC3D模拟软件进行了数值模拟,深入研究了留设40 m、50 m、60 m煤柱情况下防水煤柱应力及塑性变化,分析了向阳断层防水煤柱受采动影响的破坏机理,得出了断层下盘在采动影响下的应力及塑性变化规律。根据现场实际情况,采取了留设50 m防水煤柱,使用导高观测仪实测工作面“两带”高度,断裂带最大高度发育至距离3煤层65.49 m处,小于工作面最薄基岩处,断层也未发生旋转下沉等大规模破坏现象。工作面回采完毕后,涌水量也未发生较大变化。实践证明,向阳断层防水煤柱留设的合理性,对同类型工作面具有一定的参考价值。Aiming at the problem of fault activation leading to the formation of the Neogene aquifer caused by the mining impact of Guotun Coal Mine,taking the 3303 working face as the research background,through the theory of the water conducting fault remaining coal pillar,the remaining and setting width of the coal pillar is calculated and determined to be 47.66 m.Based on this,numerical simulations are conducted using FLAC3D simulation software to deeply study the stress and plastic changes of the waterproof coal pillar under the situations of remaining and setting 40 m,50 m,and 60 m of coal pillars.The failure mechanism of the waterproof coal pillar of the Xiangyang fault affected by mining influence is analyzed,and the stress and plastic changes law of the lower wall of the fault under mining influence is obtained.According to the on-site actual situation,a remaining and setting 50 m waterproof coal pillar is adopted,and the height of the"two belts"of the working face is measured using a height conducting observation instrument.The maximum height of the fractured zone develops to 65.49 m away from the 3rd coal seam,which is smaller than the thinnest bedrock of the working face.The fault also does not occur large-scale damage phenomenon such as rotational subsidence and so on.After the completion of the working face stoping,there is no significant change in the amount of water inflow.The practice proves that the rationality of remaining and setting waterproof coal pillars in the Xiangyang fault has certain reference value for same types of working faces.

关 键 词：薄基岩 工作面 防水煤柱 

分 类 号：TD822.3[矿业工程—煤矿开采]