查询词典 seam face

Directed at complete study on the law of the overlying strata and the characteristics of stress distribution on mining in steeply dipping seams,this paper is focused on research on the law of overlying strata and the stress variation characteristics by simulating the exploitation of the fully mechanized coal mining face in steeply dipping seam of Xinzhuangzi mine.

为了全面研究大倾角煤层开采上覆岩层垮落特征和围岩应力分布规律，运用相似材料模拟新庄孜矿大倾角综采工作面的开采，研究开采后大倾角工作面上覆岩层移动规律及应力变化特征。

The study of impact of dirt band on top coal drawing mining;2. The paper has studied the caving characteristics and technology on the fully-mechanized caving mining working face in structural complex thick seam containing dirt band are studied.

通过对综放工作面含夹矸结构复杂段顶煤放出特征和放煤工艺的研究，提出选择两刀一放单轮间隔放煤方式，有利于提高煤炭回收率，降低原煤含矸率。

It is proposed that in the face of the increasingly severe regulations for environment protection,they were able to reinforce the investment and combined investigations with the relative organizations in the conversion and cleaning technologies of coals, concentration and conversion of coal seam gas, coarse and deep processing of coal gangues so as to enhance...

提出要主动应对日益严格的环境法规，煤炭行业可通过加强煤转化、洁净煤技术、煤层瓦斯纯化和转化、煤矸石粗放与深度加工等方面的投入和联合研究，来提高燃煤产品质量，扩大煤的燃料和非燃料应用领域，降低煤开采综合成本，从而改善整个煤炭行业的经济效益。

The result shows that the drainage of surface drilling well reduces the gas concentration of outtake air in working face to a great degree and the drainage effect is restricted by factors of coal seam and location of surface drilling well.

研究结果表明：地面钻井抽采将很大程度上减小工作面回风流的瓦斯含量，且抽采效果受到煤层条件和钻井位置的制约。

3Facings and bagging to be laid flat and smooth ,elimianting welt seam from rolling to face side of garment .

袋口垫布和袋布要平顺，避免袋唇缝卷到衣服正前面

His face is seam ed with sorrow.

他的脸因忧愁而布满了皱纹。

Research on application of downward ventilation to coal mining face in horizontal seam with coal outburst in potential

结果表明，在采用下行通风后，采空区绝对瓦斯涌出量为上行风时的80%，工作面φ(CH4)下降了75%，瓦斯不再超限。

The system of production in thin coal seam fully mechanized working face was selected independently.

我国薄煤层储量十分丰富，占全部可采储量的20%以上，但整体开采水平落后于中厚及厚煤层开采水平[1]。

According as mechanism of rockburst and the state of coal seam in working face, this paper establishes numerical simulation model of rockburst.

本文主要从工作面冲击地压形成机理、工作面煤体受力状态出发建立了冲击地压数值计算模型。

Following the horizon of the coal seam thickness, the working face is arranged with short length.

急斜煤层水平分段放顶煤开采与缓斜煤层不同，工作面沿煤层厚度的水平线布置，长度短。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。