Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Narrow coal pillar"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-14 (2024)
Abstract To address the issue of roadway support failure in narrow coal pillars under dual-lane layout, this study takes the 4309 working face of Changping Coal Mine as the engineering background and employs theoretical calculations, numerical simula
Externí odkaz:
https://doaj.org/article/2c44fc50b0bc40f9961dfc4fd1b59197
Publikováno v:
Meitan xuebao, Vol 49, Iss S1, Pp 45-56 (2024)
Taking the 11–3106 working face of Menkeqing Coal Mine as the research background, a fracture model of the structure covered by thick and hard overburden at the 11–3106 working face was established. The mechanism of rock burst in the open roadway
Externí odkaz:
https://doaj.org/article/e6762a81e49040278d562a153ad953bc
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 6, Pp 2553-2567 (2024)
Abstract The roadway surrounding rock stability under the influence of interchange remaining coal pillar in close distance coal seams is one of the key factors affecting the coal mines safe and efficient mining. To reduce the roadway deformation, the
Externí odkaz:
https://doaj.org/article/f33f07f99c464167982f7eb09b824101
Autor:
Meng Wang, Wenyu Wang, Yalong Xu, Guoliang Xie, Jianyun Qin, Honglin Liu, Sijiang Wei, Qingyun Xu
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 4, Pp 1389-1410 (2024)
Abstract Though the recovery rate of coal resources can be effectively improved by adopting the gob‐side entry longwall face, which is also easy to cause tension between mining and excavation. Therefore, a new type of roadway layout, narrow coal pi
Externí odkaz:
https://doaj.org/article/06433c6c9a7547ba9157aaee90d865e1
Publikováno v:
矿业科学学报, Vol 9, Iss 2, Pp 258-269 (2024)
This study targets at asymmetric deformation of narrow coal pillar in gob-side entry driving.We put forward the bidirectional reinforcement of narrow pillar with opposite-crossing anchor cable.Specifically, we designed two types of anchor cable struc
Externí odkaz:
https://doaj.org/article/b4d2d5172dbd464bb0bb7710605a7a3c
Autor:
Lei Xu, Yuzhao Ma, Davide Elmo, Shuxue Ding, Hengzhong Zhu, Honglin Liu, Wenfeng Li, Wen Chen
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-23 (2024)
Abstract Taking the return-airway 4204 with roof cutting in Longquan Coal Mine as the engineering background, roof structure, key parameters, and deviatoric stress evolution were studied. Conclusion: The Key Stratum within a 4–8 times mining height
Externí odkaz:
https://doaj.org/article/0e8c662dc4d645d8ab71fe6ae0d0e2f8
Publikováno v:
Meitan kexue jishu, Vol 51, Iss 11, Pp 41-50 (2023)
Aiming at the problems of controlling the large deformation and failure of surrounding rock of deep soft-broken coal roadway, the gob-side entry driving with narrow coal pillar in the working face mined on both sides of the deep soft-broken coal seam
Externí odkaz:
https://doaj.org/article/128a6da823154f40a71d47dfb0f309d1
Publikováno v:
Taiyuan Ligong Daxue xuebao, Vol 54, Iss 3, Pp 466-472 (2023)
According to the geological conditions of Mabao Coal Mine in Shanxi Province, the width range of the coal pillar of the heading roadway is 6.48~8.97 m calculated by the limit equilibrium theory and the internal and external stress field theory. By us
Externí odkaz:
https://doaj.org/article/3d57e6223316413ea0e9057e3f8d6128
Publikováno v:
Meikuang Anquan, Vol 54, Iss 4, Pp 132-139 (2023)
In order to solve the problem of determining the width of coal pillar and surrounding rock control in gob-side entry driving with soft and broken composite roof, in view of the deformation and damage characteristics of soft and broken composite roof
Externí odkaz:
https://doaj.org/article/dd25e151f0db48728ed264fe31bd94b4
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