查询词典 pillar of coal

With numerical simulation method, the distribution law of coal pillar support pressure in the floor was studied.

运用数值模拟分析方法，研究煤柱支承压力在底板的分布规律。

Mechanical model of waste-filling in roadway was founded and elastic solution of displacement of coal pillar was found out by dint of Ritz method.

建立了巷道矸石充填的力学模型，并应用Ritz法求解了煤柱位移场的弹性解。

Two times hydrolyzation of Fe~(3+) and Cr~(3+) was firstly pointed out in the process of pillar preparation with hydrothermal method. In order to improve the thermal stability, Fe/Cr-Si-pillaring agent solution was synthesized by hydrolyzing Fe~(3+) and Cr~(3+) solution on the surface of silica sol, and Fe/Cr-Si-pillared montmorillonite (Fe/Cr-Si-PILM) was prepared with conventional method and hydrothermal method. Because the technical innovation of preparation is the best way to improve the PILM properties, two novel methods (Microwave method and Ultrasonication method) have been studied to synthesize Fe/Cr-PILM.In order to expand PILMs new application in the field of coal conversion, catalytic activity of Fe/Cr-Si-PILM catalyst in LongKou lignite and ShenHua coal residue liquefaction was discussed and characterized in the last part of this paper.

研究证明：蒙脱石的预处理是可行的，我们以预处理后的Ca-M为原料，研究并优化了PILM的水热法制备工艺，提出了金属离子的二次水解法；为了提高PILM的热稳定性，我们自制了硅溶胶，合成了Fe／Cr-Si三元复合柱化剂，并制备了Fe／Cr-Si-PILM；在PILM合成中，制备技术的革新是改进PILM性能的重要方法，为此我们探索了微波合成法和超声波合成法在制备Fe／Cr-PILM中的应用；最后，我们选择龙口褐煤和神华煤液化残渣为研究对象，探索了Fe／Cr-Si-PILM催化剂在煤炭液化中的应用，希望能开拓PILM应用的新领域。

Limit state equations for reliability of barrier pillar are given after analzing randomness of hydraulic pressure,tensile strength of coal bed and coeffcient of water inrush.

为了合理设计防水煤岩柱的宽度，使用了可靠度分析的&JC&方法，分析了水压力、煤层抗张强度及突水系数的不确定性，建立了防水煤柱可靠度分析的极限状态方程。

Reliability evaluation of existing structures is shown from the angle of artificial neural network. The influencing factors and deformation characteristics of buildings above goafs are summarized based on the code of coal pillar design and pressed coal mining for buildings, water-bodies, railroads and main mine roadway. The model of neural network is build to solve the problems about complex influencing factors and long evaluating time of building evaluation. BP network model compared with traditional way has strong practicability and extension value.

本文从人工神经网络的角度着手，基于国家煤炭工业《建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程》，分析了采动区建筑结构的影响因素和变形特性，运用已有的采动区建筑物可靠性评估实例，建立了BP人工神经网络可靠性评估模型，对采动区在役结构可靠性进行了评估，较好地解决了采动区建筑物可靠性评估影响因素复杂和耗时长的问题。

Stability analysis of coal pillar and reinforcement technology in north air shaft in Dongpang Mine;2. The analysis of T-beam bridge diseases and reinforcement technology ;3. The merit,demerit and application scope of carbon fiber reinforcement technology were analyzed.

分析了碳纤维加固技术的优缺点及适用范围，通过具体工程实例，对碳纤维加固用的材料特性、加固设计以及施工要点作了详细论证，解决了工程中的实际问题，达到了较好的经济效果。

In this paper,the deformation law of supporting coal pillar at Sanbula district is analyzed by using numerical simulation and the reasonable size of coal pillar and the parameter of bolt in the entry is got.

采用数值模拟方法对天隆集团公司三不拉采区支撑煤柱的变形规律进行分析，得出了该采区的合理支撑煤柱尺寸以及巷道锚杆支护参数，对设计和施工有参考作用。

In order to determine the size of coal pillar scientifically and reasonably, we mainly studied the law of stress distribution of the surrounding rock and the mechanism of narrow pillar drift and high strength bolt support and so on, indicating that using the narrow pillar drift and high strength bolt support can effectively guarantee the stability of gob-side entry in deep mine.

为科学合理地确定煤柱尺寸，保证沿空巷道的稳定，研究了沿空巷道的围岩应力分布规律、小煤柱护巷机理以及高强锚杆支护。从理论上证明了采用小煤柱护巷及高强锚杆支护方式理论上能够有效地保证深井沿空巷道的稳定。

Study on treatment of coal tar waste water by chlorine dioxide;2. Determination of naphthalene in coal tar by capillary pillar gas chromatography

白色易挥发晶体，有温和芳香气味，粗萘有煤焦油臭味；蒸汽压 0.13kPa/52.6℃闪点：80℃；熔点 80.1℃沸点217.9℃；不溶于水，溶于无水乙醇、醚、苯，相对密度(水=1)1.16；相对密度(空气=1)4.42；稳定性：稳定；危险标记：8；主要用途：用于制造染料中间体、樟脑丸、皮革、木材保护剂等

Based on the geological and mining conditions and occurrence characteristics of loose aquifer of Xinglongzhuang Colliery,water bursting cause of 4303 full-mechanized caving mining face under loose aquifer was analyzed,the prevention measures of the 3rd aquifer and reasonable dimension of coal pillar for sand proof were discussed in this paper.

根据兴隆庄煤矿地质采矿条件，结合松散含水层赋存特征，分析了四采区4303综放工作面第四系松散含水层出水的原因，探讨了防治三含水的技术途径和留设防砂煤柱的合理尺寸。

Graf, without question, is the greatest women's player in history.

格拉芙，现在，毫无疑问是女子网坛历史上最伟大的选手。

If not, you will have to look around at all your important data.

如果没有，您将需要检查所有的重要数据。