Effect of Premining on Hard Roof Distress Behavior: A Case Study
Sign Up to like & getrecommendations! Published in 2019 at "Rock Mechanics and Rock Engineering"
DOI: 10.1007/s00603-018-1657-0
Abstract: Considering the complex geological conditions of mining in the fully mechanized 828 working face of the Qingdong Coal Mine, a mining plan was developed for premining the upper No. 7 coal seam to control the… read more here.
Keywords: coal; coal seam; hard roof; premining coal ... See more keywords
Study on Practice of Rockburst Accident Prevention in Multi-seam Mining Controlled by Large Fault and Hard Roof
Sign Up to like & getrecommendations! Published in 2020 at "Geotechnical and Geological Engineering"
DOI: 10.1007/s10706-020-01473-5
Abstract: Rockburst induced by large fault and hard roof in multi-seam mining is a common problem in underground mining. In this paper, the rule of rockburst is analyzed from three aspects: influence distance of fault structure,… read more here.
Keywords: fault; multi; hard roof; fault hard ... See more keywords
Weakening effects of hydraulic fracture in hard roof under the influence of stress arch
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Mining Science and Technology"
DOI: 10.1016/j.ijmst.2017.12.024
Abstract: Abstract For the problem of hydraulic fracture propagation when weakening the hard roof in fully mechanized top-coal caving stope of ultra-thick coal seam, based on the stress arch theory and the fracture mechanics, a two-dimensional… read more here.
Keywords: hard roof; hydraulic fracture; stress arch; fracture ... See more keywords
Numerical Investigation of Gob-Side Entry Retaining through Precut Overhanging Hard Roof to Control Rockburst
Sign Up to like & getrecommendations! Published in 2018 at "Advances in Civil Engineering"
DOI: 10.1155/2018/8685427
Abstract: Gob-side entry retaining through precut overhanging hard roof (GERPOHR) method is one of the commonly used methods for nonpillar mining. However, feasibility studies of controlling rockburst by this method are few. Rockburst occurs in hard… read more here.
Keywords: overhanging hard; precut overhanging; gob side; hard roof ... See more keywords
A Method Based on Elastic Mechanics for Judging Compound Hard Roof and Its Application
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DOI: 10.1155/2020/8867259
Abstract: Compound hard roof overlying coal face is the common disaster factor leading to strong strata behaviors. To solve the long-standing problems of only considering partial factors and large deviation from the actuality when identifying compound… read more here.
Keywords: based elastic; compound hard; hard roof; mechanics ... See more keywords
Study on the fracture regularity of extra thick and hard roof in “short-face” mining and its blasting weakening technology
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Vibroengineering"
DOI: 10.21595/jve.2019.20622
Abstract: 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… read more here.
Keywords: fracture regularity; roof; short face; hard roof ... See more keywords
Mining-Induced Failure Criteria of Interactional Hard Roof Structures: A Case Study
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DOI: 10.3390/en12153016
Abstract: Due to the additional abutment stress, interactional hard roof structures (IHRS) affect the normal operation of the coal production system in underground mining. The movement of IHRS may result in security problems, such as the… read more here.
Keywords: mining induced; induced failure; key structure; failure ... See more keywords