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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 3. Отображено 3.
07-04-2023 дата публикации

Energy-absorbing grouting and large-diameter pressure relief hole combined coal roadway rock burst prevention and control method

Номер: CN115929307A
Автор: JU MINGHE, ZHU HAN, DOU LINMING, ZHANG TIANLU, CHAI FAYING, ZHANG YUSHENG, BAO YUNLONG, HE HU, HE JIANG
Принадлежит:

The invention discloses an energy-absorbing grouting and large-diameter pressure relief hole combined coal roadway rock burst prevention and control method, and relates to the field of deep coal mine dynamic disaster prevention and control. While the stress peak value and the high stress range of the roadway surrounding rock are reduced, the coal body is reinforced, and excessive pressure relief of the large-diameter pressure relief holes on the two sides of the coal seam roadway is prevented. In addition, a larger compensation space is provided for coal deformation energy release by means of the large-diameter pressure relief holes and large deformation of the energy-absorbing grouting material, and threats caused by dynamic disasters such as rock burst and the like during deep coal mining are reduced. Comprising the following steps that S1, a water pressure fracturing guide hole is drilled; s2, hydraulic fracturing; s3, grouting reinforcement is conducted on the fracturing area; and S4 ...

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Номер записи: 1
07-07-2023 дата публикации

Inert gas targeted fire preventing and extinguishing method for coal mine goaf

Номер: CN116398212A
Автор: REN WANXING, CHAI FAYING, LI HONGJIE, ZHANG TIANLU, LEI PEIDE, ZHENG WANLI, ZHAO LONG, BAO YUNLONG, ZHANG JIFU
Принадлежит:

The invention discloses a coal mine goaf inert gas targeted fire preventing and extinguishing method which comprises the four steps that firstly, goaf parameters are monitored to determine whether a spontaneous combustion zone exists or not; then, an independent gas channel is formed from the independent space around the goaf to the spontaneous combustion zone space; thirdly, inert gas is injected into the gas channel; and finally, repeating the steps until the whole coal mining process is completed and a space distribution network released by inert gas is formed. According to the method, nitrogen and other inert gases can be injected into the spontaneous combustion zone in the mode that holes are drilled in the spontaneous combustion zone from the bottom drainage roadway, the high drainage roadway or the ground and the nested pipe is embedded, and therefore precise targeted fire prevention and extinguishing are achieved. Along with advancing of the working face, the spontaneous combustion ...

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Номер записи: 2
01-08-2023 дата публикации

Device and method for obtaining rock core containing hollow inclusion

Номер: CN116517493A
Автор: ZHAO LONG, ZHANG TIANLU, HE HU, CHAI FAYING, ZHANG YUSHENG, BAO YUNLONG, CAI WU, LI XUWEI
Принадлежит:

The invention relates to a device and method for obtaining a rock core containing a hollow inclusion, the device for obtaining the rock core containing the hollow inclusion comprises a coring cylinder, a clamping mechanism and a drill bit, and the coring cylinder is provided with a first straight cylinder section and a second straight cylinder section which are coaxially arranged; the clamping mechanism is arranged in the coring cylinder and is used for clamping a rock core containing a hollow inclusion; wherein the clamping mechanism is provided with a connecting end and a clamping end, and the connecting end is located on the outer side of the first end of the second straight barrel section and used for being connected with a drill rod; the clamping end can extend from the second end of the second straight cylinder section to the interior of the first straight cylinder section and is opened so as to clamp a rock core containing a hollow inclusion; and the drill bit is coaxially arranged ...

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Номер записи: 3