CAJ | 학술논문

针对某缓倾斜多煤层复杂的采矿地质条件,运用有限元软件进行三维数值计算分析,建立三维地质概化模型时考虑了断层的影响,对不同开采条件所引起的煤层顶板岩体移动和地表沉陷进行了数值计算.得到不同开采条件下地表、煤层顶板基准点的下沉移动分布曲线,煤层顶板基准点的最大、最小沉降、沉降差,以及煤层开采后顶板的主应力、剪应力值.研究结果表明:同时回采3101、3102工作面和错时开采3101或3102工作面引起的地面最大沉降和沉降差均变化不大,分别为520 mm、498 mm、515 mm及59 mm、78 mm、81 mm.该矿开采区域缓倾斜煤层引起的地表变形状况提供定量依据,为缓倾斜煤层以及类似条件下中小矿山合理、安全、经济的开发提供参考.
침대모완경사다매층복잡적채광지질조건,운용유한원연건진행삼유수치계산분석,건립삼유지질개화모형시고필료단층적영향,대불동개채조건소인기적매층정판암체이동화지표침함진행료수치계산.득도불동개채조건하지표、매층정판기준점적하침이동분포곡선,매층정판기준점적최대、최소침강、침강차,이급매층개채후정판적주응력、전응력치.연구결과표명:동시회채3101、3102공작면화착시개채3101혹3102공작면인기적지면최대침강화침강차균변화불대,분별위520 mm、498 mm、515 mm급59 mm、78 mm、81 mm.해광개채구역완경사매층인기적지표변형상황제공정량의거,위완경사매층이급유사조건하중소광산합리、안전、경제적개발제공삼고.
In terms of the complex mining geological conditions of a gentle inclined multi-seam, this study uses a three-dimensional finite element numerical analysis software to establish a three-dimensional geological model under the different mining conditions. Considering the fault effect, the study calculates the multi-seam roof strata movement and surface subsidence caused by different mining conditions. The subsidence distribution curve of the reference points at surface and multi-seam roof strata under the different working conditions is obtained. The maximum, minimum settlement, differential settlement and the principal stress, shear stress value of surface and multi-seam roof strata after mining is also obtained. The results show that a little change of maximum surface subsidence and differential settlement is caused by extracting 3101 & 3102 faces simultaneously or mining 3101 or 3102 faces in a delayed time. The maximum surface subsidence, the surface settlement differences are 520mm, 498mm, 515mm and 59mm, 78mm, 81mm respectively. The results provide a quantitative basis for studying the gently inclined coal seam surface deformation caused by mining. It provides a useful reference for reasonable, safe, economic extraction of inclined multi-seam mining under similar conditions.