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- Key Coal Mining Technology of Flexible Shield Support for Steep Thick Coal Seam 大倾角厚煤层柔掩支架采煤关键技术
- Key coal seam 关键层
- The main key stratum that is made up of the hard stratum covering over the coal seam has a great influence on rock burst. 摘要煤层上覆坚硬厚层岩层组成的主关键层对冲击矿压的发生具有强烈的影响。
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- 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。
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- 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。
- The occurrence of rock burst not only need a great deal of elastic energy gathering in the coal seam and the around rock stratum, but also the external energy released by the main key stratum break. 冲击矿压的发生需要煤层及其周围岩层中聚集大量的弹性能外，还需要主关键层破裂等释放的外部能量；
- Coal seams intermixed with iron ore . 煤层和铁矿混杂在一起。
- 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。
- Long- wall double working- face combined winning technical practice in faull lager small section coal seam. 断层带小块段煤层走向长壁双工作面联合开采技术实践。
- Research on coal bedding structure is the theory foundation and precondition of coal seam gas exploitation. 煤体层理结构的研究是煤层气开发开采的理论基础和前提条件。
- Supervision rights for 94 state key coal mines were transferred from the central government to provincial levels,and the structural adjustment was strengthened to close a number of unlicensed,heavy-polluting and irrationally distributed small coal mines. 94户国有重点煤矿全部下放地方管理，并加大结构调整的力度，关掉一批非法生产、污染严重和布局不合理的小煤矿。
- So it is feasible used the logging data to forecast coal seam gas content,and the applied value is enhance further. 证明用测井资料预测煤层瓦斯含量是可行的,从而进一步加强了测井资料的实际应用价值。
- The authors used the Analytic Hierarchy Process(AHP) in the researches of coal seam floor water-irruption. 将系统工程中的层次分析法引入煤层底板突水的研究中。
- The technology of roadway protection with coal waste residue concrete and application in thin coal seam are introduced. 介绍了煤矸渣混凝护巷技术及其在薄煤层中的应用。
- The main coal seam of Taiping colliery is 11~# coal seam with a thickness of 1.5 m. 太平煤矿主采11%23煤层;煤厚1.;5 m
- The gauge can simultaneously measure quantity and pressure of water infused into coal seam. 该水表能同时测定注入煤层中的水量和注水压力。
