Results 181 to 190 of about 1,201 (198)

Analysis on the floor stress distribution and roadway position in the close distance coal seams

Arabian Journal of Geosciences, 2016
According to the mine ground pressure and soil mechanics, the stress under a pillar is proportional to the coal pillar pressure and is in inverse proportion to the vertical depth and the pressure diffusion angle and is spreading along the gravity direction elliptically.
Liu Xinjie, Li Xiaomeng, Pan Weidong
openaire   +1 more source

Failure Characteristics and Evolution Law of Overburden Structure Under Repeated Mining of Close‐Distance Coal Seam Group in Ningdong Mining Area [PDF]

Energy Science and Engineering
It is difficult to control the mine pressure in the coal face under the close coal seam group. On the basis of the mining background of 4‐1#, 4‐2#, and 4‐3# coal seams in the I01 mining area of the Ningdong mining area, the fracture characteristics and ...
Xuesheng Liu
exaly   +2 more sources

Coal Pillar Size of Ultra Closed Distance Seam and Layout of Mining Gateway

Advanced Materials Research, 2012
The support effectiveness of mining gateway at closed-distance seam is determined by the layout of mining gateway and the stress effect of the upper coal pillar load on the bottom seam. The stress effect is affected by the coal pillar size and the properties of the coal pillar and surrounding rocks.
Chun Lei Ju, Guo Dong Zhao, Feng Gao
openaire   +1 more source

Research on precise quantitative traceability of combined gas extraction in close-distance coal seam group

Environmental Earth Sciences
Feng Du, Jiazhi Sun, Sun Jiazhi
exaly   +2 more sources

Refinement Study on the Water-Inrush Risk of Close-Distance Thin Coal Seam Mining with Pressure in the Lower Coal Seam

Mine Water and the Environment, 2023
Yu Xue, Shuyun Zhu, Heming Qiu
openaire   +1 more source

Evaluating the Safety of Using the Combined Mining Method in Close-Distance Coal Seams

Geotechnical and Geological Engineering, 2023
Rui PENG, Shiyuan JIANG
openaire   +1 more source

Law and Control of Overburden Movement of Coal Seam Mining in Close Distance

Foreign Language Science and Technology Journal Database Engineering Technology, 2021
openaire   +1 more source

Feasibility discrimination of upward mining in close-distance coal seam and mining influence analysis

2022
M.A. Qihua, C.H.I. Lihui, M.A. Weixiang
openaire   +1 more source

Failure mechanism and divisional differentiated control of surrounding rock in mining roadway under remaining coal pillar in close‐distance coal seam

Energy Science and Engineering, 2023
Shengrong Xie, Dong-Dong Chen, En Wang   +2 more
exaly  

In situ investigations of failure zone of floor strata in mining close distance coal seams

International Journal of Rock Mechanics and Mining Sciences, 2010
Y.L. Tan, T.B. Zhao, Y.X. Xiao
openaire   +1 more source