Vui lòng dùng định danh này để trích dẫn hoặc liên kết đến tài liệu này: http://thuvienso.vanlanguni.edu.vn/handle/Vanlang_TV/18383
Nhan đề: Analysis and Application on Controlling Thick Hard Roof Caving with Deep-Hole Position Presplitting Blasting
Tác giả: Chen, Baobao
Liu, Changyou
Từ khoá: Wave attenuation
Roofing
Strata
Blasting
Detonation
Occupational safety
Hydraulic fracturing
Stability
Stone
Mining
Stress waves
Mechanics
Năm xuất bản: 2018
Nhà xuất bản: Hindawi Limited
Tóm tắt: For the thick hard roof (THR) in Datong mining area, mining operations often led to large-scale hanging-roof and frequent and strong strata behavior, threatening mining safety seriously. Based on the instability mechanism, the fracture model for THR was established, including rock blocks articulation and combined cantilever beam, and the limit initial and periodic intervals of THR were determined to be 36.0 m and 8.0 m, respectively. The study proposed the deep-hole presplitting blasting (DPB) for weakening THR for mitigating strong strata behaviors. Blasting-induced fracture characteristics were calculated, determining the charging coefficient and holes spacing. LS-DYNA was employed for establishing a DPB model to analyze crack evolution under the synergistic action of blasting stress wave and detonation gas and the attenuation characteristics for rock peak particle velocity, verifying the rationality of blasting parameters. Field measurement analysis indicated that the immediate roof induced a timely collapse to fill the goaf and the THR was effectively cut off near the presplitting line. Meanwhile, the working resistance was utilized with safety allowance. The field application showed the DPB on controlled THR caving achieved the significant effect.
Mô tả: Advances in Civil Engineering; New York Vol. 2018, (2018). DOI:10.1155/2018/9763137
Định danh: http://thuvienso.vanlanguni.edu.vn/handle/Vanlang_TV/18383
ISSN: 1687-8086
Bộ sưu tập: Bài báo_lưu trữ

Các tập tin trong tài liệu này:
Tập tin Mô tả Kích thước Định dạng  
BBKH1029_TCCN_ Analysis and Application on.pdf
  Giới hạn truy cập
Analysis and Application on Controlling Thick Hard Roof Caving with Deep-Hole Position Presplitting Blasting4.19 MBAdobe PDFXem/Tải về  Yêu cầu tài liệu


Khi sử dụng các tài liệu trong Thư viện số phải tuân thủ Luật bản quyền.