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- The paper regards the main roof strata in uphill and downhill mining of an inclined longwall as a elastic plate. 本文将倾斜长壁仰斜、俯斜开采的老顶岩层视为倾斜弹性板。当板的长短跨度之比＞2时，板的荷载主要由短跨边来承担。
- Moreover, in the weighting process of the main roof, the characteristics of ground pressure manifestation are all of "camelback" form. 在来压过程中,回采工作面的矿压显现特征量均呈“驼峰”型。
- Therefore, the location of terminal line of the coalface should be put at the place where main roof periodic weighting process has already done. 因此，工作面终采线的位置，应尽可能确定在老顶岩层周期来压完成之后。
- The length of the first coalface in a mining-district controls the distances of first weighting and periodic weighting of the main roof. 在采区范围内首采工作面的长度控制着老顶的初次来压步距和周期来压步距。
- Huang Q X, Qian M G, Shi P W.Structural analysis of main roof stability during periodic weighting in longwall face[J].Journal of China Coal Society, 1999,24(6): 581-585. [6]黄庆享;钱鸣高;石平五.;浅埋煤层采场老顶周期来压的结构分析[J]
- The researches show that the main roof initial fracture process,when incline longwall being employed,has three types,and the calculation formula is given,wa also analyzed th... 同时分析了煤层倾角和顶板条件对老顶断裂和矿压显现的影响。
- The position and state of the main roof above the terminal line of the coalface nearby the rises affect the magnitude of the peak abutment pressure and the difficult extent of the rise maintenance. 上山附近终采线上方老顶岩层的位态影响着煤柱支承压力的大小和上山维护的难易程度。因此,工作面终采线的位置,应尽可能确定在老顶岩层周期来压完成之后。
- Study of the main roof pressure and gas outburst rules 采场老顶来压活动瓦斯涌出规律的研究
- The main impediment to growth is a lack of capital. 影响发展的主要障碍是缺乏资本。
- Crowds thronged the main square of the city. 城里的大广场上挤满了人群。
- The whole school (was) assembled in the main hall. 全校在大礼堂集合。
- The main feature on the program is her song. 那个节目的主要号召物是她的歌。
- Fables often have animals as the main characters. 寓言常以动物为主角。
- A heavy snowfall block the main road. 一次严重的降雪阻塞了主要公路。
- The gas main explode and set fire to the house. 煤气总管爆炸引起房子失火。
- Study of Main Roof Stability Druing First Weighting On Linxi Coal Mine 林西矿深部开采顶板初次来压规律相似模拟研究
- I grasped the main point of the speech. 我领会了这篇演讲的要点。
- The country's main products are gold and cocoa. 这个国家的主要产品是可可和黄金。
- Men and machines poured along the main highways. 人和机动车顺着公路如潮涌而去。
- A main feature of computer virus. 计算机病毒的一种主要特性。
- 今日热词
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
