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- 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。
- Complex coal seam roof and floor conditions made stope support system low stiffness,poor stability and a very adverse the exploitation environment. 复杂的煤层顶底板条件使得采场支护系统刚度低、稳定性差,开采环境十分恶劣。
- Water channels include coal seam roof and floor mining induced fissures,faults,karstic subsided columns,Quaternary scuttles,fissure concentrated zones and badly sealed boreholes. 充水通道包括顶底板采动裂隙、断层、岩溶陷落柱、第四系天窗、裂隙密集带及封闭不良钻孔等,其中顶底板采动裂隙、断层、岩溶陷落柱为主要导水通道。
- Taking a certain coal mine in North China for example in this paper,two different water quality types of mine inflows from coal seam roof and floor aquifers have been effectively identified by applying Adaline method. 本文以华北某矿井为例 ,采用具有线性功能函数的神经元 (AdaptiveLinearElement)方法对来自煤层顶、底板含水层的两种不同水质类型矿井水进行了有效的识别。
- Prevention Coal Seam Roof Water In Using Gradient Axis Double Joint 向斜轴部双机联运防治煤层顶板水
- A Case Study of Rock Failure and Water Inrush from the Coal Seam Roof 煤层顶板破坏与突水实例研究
- Keywords artificial coal seam roof;extract sublayer coal;simulating experiment; 关键词煤皮假顶;底煤复采;模拟实验;
- Applying of Anchor Wire Support under the Conditions of Coal Seam Roof and Broken Rock Roof 锚索支护在煤层顶板和破碎岩石顶板条件下的应用
- Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method 开采煤层顶板环形裂隙圈内走向长钻孔法抽放瓦斯研究
- coal seam roof 煤层顶板
- coal seam roof and floor 煤层顶底板
- No.7 coal seam roof 7煤层顶板
- Coal miners; coal seams; coal haulers. 煤矿工; 煤层; 运煤工
- Analysis and Control Countermeasures of Fracture Water Irruption in Roof Sandrock of No.4 Coal Seam in Mine of Hengyuan Co. 恒源公司矿井4煤层顶板砂岩裂隙水突水分析及治理。
- Part roof fall accident cause is analyzed in flase top mining in No.5 Coal Seam of Pinggang Coal Mine.The prevention and cure measures are pointed out. 通过对平岗煤矿5%23煤在托伪顶回采时发生的局部冒顶事故原因的分析,提出了解决该问题的防治措施。
- Coal seams intermixed with iron ore. 煤层和铁矿混杂在一起。
- Introduced the technology to control the roof in the gob with man-forced deep drilling and explosion in 14#coal seam as well as to analyze the effect. 介绍14号层人工强制深孔爆破处理采空区顶板的技术以及在实践中得出的经验,并对其效果进行了分析。
- Fractal Evaluation of Rock Quality for the 4th,6th Coal Seams Roof of Liuqiao Mine Area 刘桥矿区4、6煤层顶板岩体质量分形评价
- The coal seam tunnel of compound mudstone roof of large span is the tunnel that is violent out of shape,roof is easy falling and safeguard is very difficult. 大跨度复合泥岩顶板煤层巷道是围岩变形剧烈且顶板易冒落、极难维护的巷道。
- In the process of Shanxi formation seam mining in Shaqu Colliery,the seam roof and floor sandrock aquifers constitute the direct discharge aquifers. 沙曲煤矿山西组煤层开采过程中,煤层顶底板砂岩含水层构成煤层开采时的直接充水含水层。
