基于有限元RFPA^(2D)数值模拟对上行开采可行性研究与应用  

Feasibility study and application of upward mining based on finite element RFPA^(2D) numerical simulation

作　　者：孙健新 SUN Jianxin(Department of Resources and Safety Engineering,Shanxi Engineering Vocational College,Taiyuan 030001,China)

机构地区：[1]山西工程职业学院资源与安全工程系,山西太原030001

出　　处：《煤炭科技》2024年第5期52-55,62,共5页Coal Science & Technology Magazine

摘　　要：慈林山煤矿分上下可采煤层9号煤层和15号煤层,目前15号煤层局部已采完,造成上覆岩层产生移动,对上部9号煤层有一定的影响。为分析9号煤层的开采可行性,以慈林山煤矿的15号煤层为工程背景,采用RFPA^(2D)数值试验系统,建立15号煤开采的数值计算模型,动态分析15号煤层开采过程中上覆岩层及采煤面前后方上覆岩层破坏规律,得出9号煤层处于15号煤层裂隙带与弯曲下沉带的交界处的结论,分析认为9号煤层在15号煤层开采稳定后,可以进行开采,最终得出可以对9号煤层正常进行开采,并进行了工业性实践。通过对9号煤层正常开采时的超前压力数据进行监测分析,表明该围岩压力满足矿井的正常生产需要。Cilinshan Coal Mine is divided into upper and lower coal seams,namely No.9 coal seam and No.15 coal seam.At present,the No.15 coal seam has been partially mined,resulting in the movement of the overlying rock layer,which may have a certain impact on the upper No.9 coal seam.To analyze the mining feasibility of No.9 coal seam,taking the No.15 coal seam of Cilinshan Coal Mine as the engineering background,using RFPA^(2D) numerical test system,the No.15 coal mining numerical calculation model was established,dynamic analysis of No.15 coal seam in the mining process and the rear overlying rock destruction rule was carried out.The conclusion was drawn that coal seam 9 is located at the boundary between the fracture zone and the curved subsidence zone of coal seam 15.The analysis suggested that No.9 coal seam could be mined after stable mining of No.15 coal seam,and it was finally concluded that No.9 coal seam can be mined normally,and industrial practice was carried out.By monitoring and analyzing the advance pressure data of No.9 coal seam,it shows that the surrounding rock pressure meets the normal production needs of the mine.

关 键 词：上行开采 采空区 RFPA^(2D)数值模拟 支撑压力 

分 类 号：TD325[矿业工程—矿井建设]