Pressure-Arching Characteristics of Fractured Strata Structure during Shallow Horizontal Coal Mining [PDF]
, 2018 It is an important problem for the alternated strong and weak roof weighting to threat the safety of working face during shallow coal mining and the total thickness breaking of the thin bedrock to cause the serious ground subsidence.
Bingqiang Huang +5 more
core +2 more sources
Gob Spontaneous Combustion in a Fully Mechanized Long-wall Top-Coal Caving Face [PDF]
, 1999 Geological conditions allow, underground coal mines in China tend to use comprehensively mechanized roof-coal caving technique in an effort to gain a higher degree of mechanization at coal faces as well as higher coal production rates. As a face advances,
Deng, Jun +4 more
core +1 more source
Key technologies and demonstration of unmanned steeply inclined short-wall fully mechanized top-coal caving intelligent mining [PDF]
Since the 14th Five-Year Plan, my China’s coal mine digital intelligence technology has developed rapidly, especially in thin coal seam mining. However, the unmanned intelligent mining technology of steeply inclined short-wall fully mechanized caving is ...
Bin GU +10 more
core +1 more source
An Innovative Approach for Gob-Side Entry Retaining With Thick and Hard Roof: A Case Study [PDF]
, 2018 An innovative roadway layout in a Chinese colliery based on gob-side entry retaining (GER) with thick and hard roof (THR) was introduced. Suspended roof is left with a large area in GER with THR, which leads to large area roof weighting (LARW).
Hai Wu +6 more
core +2 more sources
Simplified Cost Models For Underground Mine Evaluation: A Handbook for Quick Prefeasibility Cost Estimates [PDF]
, 2020 This handbook provides simplified cost models for evaluating underground mines. Regression analysis is used to generate capital and operating cost equations for each model in the form Y = AXB, where Y is the cost estimated and X is the assumed production
Camm, Thomas W., Stebbins, Scott A.
core +1 more source
Study on the fracture regularity of extra thick and hard roof in “short-face” mining and its blasting weakening technology [PDF]
, 2019 Based on the 211113 “short face” of Xinji No. 2 Mine of China Coal Group, this study investigated the weakening regularity of blasting vibration and rock bursting of roof through FLAC3D numerical simulation on the basis of the hard roof fracture ...
Jucai Chang +4 more
core +2 more sources
Vertical Stress and Deformation Characteristics of Roadside Backfilling Body in Gob-Side Entry for Thick Coal Seams with Different Pre-Split Angles [PDF]
, 2019 Retained gob-side entry (RGE) is a significant improvement for fully-mechanized longwall mining. The environment of surrounding rock directly affects its stability.
Feng, Guorui +8 more
core +1 more source
Numerical Simulation Study of Support Pressure around the Fully Mechanized Caving Face
World Journal of Engineering and Technology, 2023 Peihao Li +3 more
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Meitan kexue jishuThe coal seam at the 2125 fully mechanized top-coal caving face in Hebi Coal Mine No. 6 exhibits unstable occurrence, with a thickness ranging from 0.4 m to 24 m and a dip angle varying between 8° and 35°.
Dongyin LI +5 more
doaj +1 more source
Meikuang Anquan, 2022 Aiming at the problem of abnormal CO gas and unclear source type in 160205 working face of Yangchangwan Coal Mine, the source of CO gas in working face was comprehensively analyzed through borehole test in deep coal body, temperature and CO distribution test in goaf, CO distribution test in working face, coal crushing experiment, temperature programmed
ZHAO Xingguo +3 more
openaire +1 more source