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- Gas content in coal seam; 煤层瓦斯含量;
- Discussion is also conducted about the gas resources in Huainan and Huaibei coal mines, where gas content in coal seams, being abundant, demands adequate attention to its effective recovery 此外,本文讨论了两淮的煤矿瓦斯资源,煤层瓦斯量丰富,它的回收问题应引起足够的重视
- Deep-hole presplitting explosion in coal seams with high gas content and low permeability was numerically simulated and analyzed. 摘要针对高瓦斯低透气性煤层，对深孔预裂爆破进行了数值模拟分析研究。
- 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。
- This study provides a scientific method about studying the gas content of the coal seam unmined and provides the basic data about the safe mining. 这为未开采煤层瓦斯含量的研究提供了科学方法，并为该煤矿的安全开采提供了基础资料。
- We take the 14# coal seam of Xiaonan coal mine of Tiefa basin as an example and analyse the geologic agent systematically which influences the gas content. 未开采煤层瓦斯含量及影响因素研究,是煤矿安全生产的重要基础研究工作,以铁法盆地晓南矿未开采的14%23煤层为例,系统分析了影响瓦斯含量的地质因素。
- EXPERIMENTAL STUDY ON THE RELATION BETWEEN THE BURST TENDENCY AND WATER CONTENT IN COAL SEAM 煤层冲击倾向性与含水率关系的试验研究
- Analysis on Sulphur Content in Coal from Each Coal Seam of Fangezhuang Colliery and Effect of this on Washed Coal Products 范各庄矿各煤层硫分分析及对选后产品的影响
- The rock mass structure can be expressed by rock stratum effect thickness influence coefficient. It is more scientific then using roof rock and sand content in the study of coal seam gas preservation. 研究表明,煤层围岩岩体结构控制了煤层瓦斯的赋存,岩体结构可用岩层效应厚度影响系数来表示,应用这一参数研究煤层瓦斯赋存比用煤层顶板岩性及含砂率更科学。
- Little faults in coal seam are important for coal and gas outburst prevention and control,and water outburst prevention and control. 煤层小断层对矿井煤与瓦斯突出及矿井突水防治具有重要的实际意义。
- 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。
- Factors such as buried depth,volatile matter of raw coal,water content and ash content in raw coal can produce influence upon gas content to some extent. 分析认为:研究区煤层气含量各煤层差异性较大,埋深、原煤挥发分、原煤水分、灰分产率等因素对煤层气含量均有一定的影响。
- coal seam with high gas content and low permeability 高瓦斯低透气性煤层
- 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。
- The relationships between the permeability of the methane gas in coal seam and surface fractal dimension and tortuosity fractal dimension are proposed based on fractal theory and Darcy Law. 基于分形理论和达西定律,研究了孔隙的弯曲分形维数和表面积分形维数与瓦斯渗透率参数之间的关系;
- The methods to calculate pressure,d rilling fluid density,gas content and solid content in borehole are given,and th eir distributions along the borehole are discussed. 给出了井眼中压力、钻井液密度、含气量和固体浓度的计算方法，并对它们的分布规律进行了研究。
- 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。
- According to analyze metal microstructure, chemical composition and gas content in the steel, we discuss the delaminating phenomenon of hot-rolling strips and give out the reason. 采用金相检验、化学分析等方法,对热轧镇静带钢出现的分层情况进行了探讨。
- The studies also show that magnetized water has a good application prospect in coal seam infusion. 磁化水在煤层注水方面具有良好的应用前景。
- Studied the effects of nitro humic acid natrium extracted from lignite on growth performance of fattening pig, harmful gas content in shed and digestibility of feedstuff. 摘要研究了褐煤中提取的硝基腐植酸钠对生长育肥猪生长性能、舍内有害气体含量和饲料中营养成分消化率的影响。
