Tyt. z nagł.Pozostali autorzy artykułu: Xin-zhu Hua, Li-jun Xiong, Rong Huang.Bibliogr. s. [479].Główne pokłady węglowe nr 71 i 72 kopalni Huaibei wykazują cechy zarówno rozszczepienia, jak i scalania. Podczas wybierania warstwowego na obszarze rozszczepienia głównym problemem jest zapewnienie bezpieczeństwa dolnego pokładu nr 72. Na przykładzie przodka 7225 kopalni Xutuan przeanalizowano wpływ wydobycia w pokładzie nr 71 na pokład nr 72 przy użyciu programu FLAC3D. Propagację fal naprężeń w spągu, zakres pęknięcia i przesunięcia podczas wybierania pokładu węgla nr 71 i 72 zbadano za pomocą symulacji numerycznej, co daje podstawy do lepszej kontroli stropu i do wyboru obudowy pod wybieranie pokładu węgla nr 72.The main mining coal seams 71 ...
The study show the influence of coal mining on pillar under a repeated mining, in a close coal seam ...
The study show the influence of coal mining on pillar under a repeated mining, in a close coal seam ...
There is abundant coal resource of Jurassic period in Yulin City, and the problem of shallow buried ...
The main mining coal seams 71 and 72 of Huaibei mine area show a relation between splitting and merg...
The 7225 face is above the gob of 7118 face. The elevation of face ranges from –452.9 to –485.6 m, a...
The 7225 face is above the gob of 7118 face. The elevation of face ranges from –452.9 to –485.6 m, a...
Przedstawiono numeryczną dwuwymiarową symulację pola naprężenia wytworzonego w wyniku wielopokładowe...
Tyt. z nagłówka.Bibliografia s.[599].Dostępny również w formie drukowanej.ABSTRACT: One of the natur...
The examined problem is to assess the stress and strain state of the bottom layers in thick regular ...
Exploitation of hard coal seams by roadway system is applied by two coal mines in southern Poland in...
Based on (RFPA2D-Gasflow) numerical software, the characteristic of mining strata damage and fractur...
A steep seam similar simulation system was developed based on the geological conditions of a steep c...
In this study, the spatial distributions of stress and fracture fields for three typical underground...
Extremely close coal seam groups are widely distributed in China, and the main mining method is down...
There is abundant coal resource of Jurassic period in Yulin City, and the problem of shallow buried ...
The study show the influence of coal mining on pillar under a repeated mining, in a close coal seam ...
The study show the influence of coal mining on pillar under a repeated mining, in a close coal seam ...
There is abundant coal resource of Jurassic period in Yulin City, and the problem of shallow buried ...
The main mining coal seams 71 and 72 of Huaibei mine area show a relation between splitting and merg...
The 7225 face is above the gob of 7118 face. The elevation of face ranges from –452.9 to –485.6 m, a...
The 7225 face is above the gob of 7118 face. The elevation of face ranges from –452.9 to –485.6 m, a...
Przedstawiono numeryczną dwuwymiarową symulację pola naprężenia wytworzonego w wyniku wielopokładowe...
Tyt. z nagłówka.Bibliografia s.[599].Dostępny również w formie drukowanej.ABSTRACT: One of the natur...
The examined problem is to assess the stress and strain state of the bottom layers in thick regular ...
Exploitation of hard coal seams by roadway system is applied by two coal mines in southern Poland in...
Based on (RFPA2D-Gasflow) numerical software, the characteristic of mining strata damage and fractur...
A steep seam similar simulation system was developed based on the geological conditions of a steep c...
In this study, the spatial distributions of stress and fracture fields for three typical underground...
Extremely close coal seam groups are widely distributed in China, and the main mining method is down...
There is abundant coal resource of Jurassic period in Yulin City, and the problem of shallow buried ...
The study show the influence of coal mining on pillar under a repeated mining, in a close coal seam ...
The study show the influence of coal mining on pillar under a repeated mining, in a close coal seam ...
There is abundant coal resource of Jurassic period in Yulin City, and the problem of shallow buried ...