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- Evaluting model on weight gray correlation of coal seam top rock stability 煤层顶板稳定性的加权灰关联评价模型
- Keywords volcanic event layer;eruptive cycle;correlation of coal seams;Inner-Mongo-lia Geosycline; 火山事件层;喷发旋回;煤层对比;内蒙海槽;
- correlation of coal seams 煤层对比
- correlation of coal seam 煤层对比
- Under the tectonic stress,the deformations of coal seams and the adjoining rock strata infault-block structural area are of good coordination and close correlation. 断块构造区域内煤层及其周围岩层在构造应力作用下的形变具有很好的协调性和密切的相关性。
- Prewetting of coal seams by water infusion is an essential measure for dust control at working faces. 煤层注水预湿是采煤工作面防尘的治本措施,添加湿润剂是改善煤层注水效果的重要途径。
- With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining. 摘要随着煤矿开采深度增加,综放开采回采巷道易发生冲击地压危害。
- The study results contribute to master the occurrence regularities of coal seams,judge and treat the geological anomalies. 研究成果对掌握煤层赋存规律,地质异常判断和处理都很有帮助。
- Based on experiments, this paperputs forward a new method of using infiltration rate of particle coal for determining gaspermeability of coal seams. 本文以实验为基础,研究提出了一种用颗粒煤渗透率确定煤层透气性系数的新方法。
- Application shows that the method is simple, reliable and applicative, and is a new method for risk prediction of coal seams outburst. 实例应用表明,该方法计算简便,预测结果可靠,实用性强,为煤层突出危险性预测提供了一种新方法。
- In order to forecast and prevent gas discharging quantity,it must grasp discharging rule of coal seams gas and gas discharging quantity. 为了有效地进行瓦斯涌出量的预测和防治,就需要掌握煤层瓦斯的解吸规律和可解吸瓦斯量。
- 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。
- 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。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- This method can solve a lot of unascertained problems in risk prediction method of coal seams outburst, and also can analyze the unascertained problem quantitatively. 该方法适用于解决煤层突出危险性预测过程中诸多因素的不确定性问题,还能对其进行定量分析。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
- The reserves of thin coal seam shearer and the developing trend of coal seam shearer of our country are analysed. 分析我国薄煤层储量以及薄煤层采煤机的发展状况及趋势。
- Prewetting of coal seams by water infusion is an essential measure for dust control at working faces.Adding of wetting agent is an important approach for improving water infusion. 煤层注水预湿是采煤工作面防尘的治本措施,添加湿润剂是改善煤层注水效果的重要途径。
- He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
- According to geological conditions of coal seams in Huainan mining area, the ground and dyke movement induced by different mining schemes was simulated and analyzed by using FLAC. 摘要以淮南矿区某采区煤层开采为研究对象,采用非线性大变形FLAC程序,对不同开采方案引起的地表移动和对地面防汛堤坝的移动变形状况进行了数值模拟。