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- Keywords coal seam;coal petrography;maceral; 煤层;煤岩类型;显微组分;
- Keywords coal seam thickness;substep drivage;support parameter;support method; 煤层厚度;分台阶掘进;支护参数;支护方法;
- Keywords coal;spontaneous combustion of coal seam;geologic hazard;Wuhai city; 煤炭;煤层自燃;地质灾害;乌海市;
- Keywords Coal seam;hydraulic fracturing;microcrack;production increase; 煤层;压裂;微裂缝;增产;
- Keywords Coal seam;Producing dust property;Producing dust rule;Explosivity of smut;Research; 关键词煤层;产尘特性;产尘规律;煤尘的爆炸性;研究;
- Keywords coal thickness coefficient of variation;mineable probability;CPR;stability grading of coal seam; 煤层厚度的变异系数;可采概率;变概比;煤层稳定型别;
- Keywords coal seam water injection;magnetized water;physicochemical properties;seepage;wetness; 煤层注水;磁化水;理化特性;渗透;润湿;
- Keywords coal seam floor;the Fast Lagrangina Analysis of Continua;construct stress; 煤层底板;快速拉格朗日分析;构造应力;
- Keywords Coal seam affusion;Affection factors;Rough set;Reduction;Information systems; 煤层注水;影响因素;粗糙集;约简;信息系统;
- Keywords coal seam volcanic ash clayrock bands horizon and distribution mineralogi-cal and petrological properties gensis; 矿物岩石特征;火山灰;粘土岩夹矸;层位及分布;成因;
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Keywords coal seams;erosion zones;sand bodies;isopach map;prediction; 关键词煤层;冲刷带;砂体;等厚图;预测;
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- The Gaussian curvature of No.3 coal seam in Qinshui basin is calculated. 计算了沁水盆地3号煤层的高斯曲率。
- Factors affected coal seam permeability change and its law is analyzed. 分析了煤层透气性变化的影响因素及变化规律。
- The outburst-proneness of 6# coal seam are studied with five indexes. 采用5种指标对该矿6%23煤层冲击倾向性进行了实验研究。
- Coal seams intermixed with iron ore . 煤层和铁矿混杂在一起。
- Keywords Coal seams with double porosities;Deformed media;Numerical solution;Nonlinear;Well testing analysis; 双重介质煤层气藏;变形介质;数值解;非线性;试井分析;
- The way and principle of Gaussian curvature method for forecasting natural fracture zones in coal seam are discussed. 摘要论述了高斯曲率法预测煤层天然裂隙发育区的基本原理和方法。
- Outburst prevention technique of excavating in coal seam will be directly concerned colliery safety production and excavates taking over. 摘要突出煤层煤巷掘进防突直接关系到煤矿的安全生产和采掘接替。
