STUDY ON INTENSIVE DESIGN AND CONTROL OF CHAMBER GROUP UNDER THE CONDITION OF WEAK SURROUNDING ROCK
Qinglong Wei
1,2
1
Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing
2
School of Mechanics and Civil Engineering, China University of Mining & Technology, Beijing
Corresponding author
Kaifang Zhou
Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing
Key Laboratory for Geomechanics & Deep Underground Engineering, China University of Mining & Technology, Beijing
Mining Science 2019;26:223-240
KEYWORDS
TOPICS
Application of fundamental science to miningMine engineering and construction, underground constructionMining geomechanics and geotechnicsMine ventilation and geotechnics
ABSTRACT
In order to study the design and stability control of deep soft rock chamber group, taking ninth coal mine of Hebi Coal Power Co., Ltd. as the engineering background, The main problem in normal design is analyzed with the combined method of FLAC3D numerical simulation and field engineering test. and then puts forward targeted control measures and carries out field application. The results show that, compared with the conventional design, the intensive design can reduce the stress concentration degree and plastic zone range of the surrounding rock, as well as reduce the quantities. Compared with conventional supporting schemes, the surrounding rock deformation greatly reduces by more than 82% after adopting bolting and shotcreting with wire mesh + anchor cable + floor anchor supporting. Among them, the floor heave control has obvious effect, and the decreasing amplitude reaches more than 93%. The field application shows that the surrounding rock deformation of the main chamber is within the allowable range, and the chamber control effect is good. Therefore, the research results can provide reference for the design and control of similar chamber groups.
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| eISSN: | 2353-5423 |
| ISSN: | 2300-9586 |
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