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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
- correlation of coal seam 煤层对比
- 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
- 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。
- 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。
- Exploration evaluation coal seam gas is a base of coal seam gas exploration and developing. 煤层气的勘探评价,是开展煤层气勘探与开发工作的基础。
- The test results show that the drawing interval of 1.5 m is helpful for controlling dead-unconsolidated thin sandstone of coal seam roof and reduce sand ratio of drawn top-coal. 试验结果表明，放煤步距采用三采一放有利于控制顶板极松散细砂岩，降低放出顶煤的含砂率。
- An inversive research method was proposed through analyzing the complicated changing features of permeability of coal seam and the problems existing in actual measurement. 分析了煤层渗透率的复杂变化特点和实际测量上存在的问题，提出其反演方法。
- The development of this compound technique of perforating in fracturing blasting of coal seam showed a very promising applicable future. 该技术在煤层致裂爆破以及其他领域的多方向发展,具有良好的应用前景。
- Based on analysis of sedimentary facies of coal measures in Tiefa mining area, the erosion zones in the coal seam No.4 in Dalong mining area ar... 在对铁法矿区煤系沉积相分析的基础上,利用煤层顶板砂体等厚图对大隆井田4%23煤层中的冲刷带进行了预测;揭示了铁法矿区煤层冲刷带的总体分布规律。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- 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。
- It used draining while mining and light &middle pressure water injection in coal seam, those completely eliminated the danger of coal and gas outburst. 在生产过程中，采用边采边抽和浅孔中压注水措施，完全消除了工作面的突出危险性。
- This seam of coal reposes on a layer of clay. 这个煤层处于一层黏土岩之上。
- Prohibition was laid on the export of coal. 禁止煤炭输出。
- The inversive calculation result showed that the permeability coefficient of coal seam and its changing condition can be determined by seam gas Pressure. 算例反演的结果表明，利用反演方法能够通过煤层瓦斯压力确定煤层的透气性系数及其变化状况。
- He put a shovel of coal on to the fire. 他往火炉里加了一铲煤。
