scholarly journals Characteristic Analysis of Surface Subsidence in Deep Mining

2014 ◽  
Author(s):  
Xikun Chang ◽  
Rongfa Wang ◽  
Jinchen Zhang
Keyword(s):  
Surface Subsidence ◽  
Characteristic Analysis ◽  
Deep Mining

Study on Surface Subsidence Law Induced by Deep Mining of Large Steep Metal Deposit

2013 ◽  
Vol 295-298 ◽  
pp. 2902-2905
Author(s):  
Yan Hui Guo ◽  
Ke Peng Hou
Keyword(s):  
Surface Deformation ◽  
Three Dimensional ◽  
Mining Area ◽  
Surface Subsidence ◽  
Ground Movement ◽  
Technological Problem ◽  
Underground Engineering ◽  
Deep Mining ◽  
Displacement Angle ◽  
Dimensional Simulation

To solve this difficult technological problem that predicts the surface subsidence that induced by deep mining of large steep deposit. Through understanding engineering geological characteristics and mining conditions for a certain mining area, the three-dimensional simulation model of deep mining with a high degree similarity in space and mechanics morphology have been established, and the exploitation of the mining area has been systematically simulated. After excavation of the third stage, the calculated values of surface subsidence coincided with the measured values of GPS. Then it has been more accurately predicted surface subsidence and displacement angle and the range of surface deformation which were induced by deep mining in fourth stage project. It provides the basis for the positioning of underground engineering and design of the range of ground movement in deep mining.

Study on the Structure Model and Controlling Method of Subsidence in Flat Seam and Deep Mining

2006 ◽  
Vol 306-308 ◽  
pp. 1403-1408 ◽  
Author(s):  
Chong Ge Wang ◽  
Wei Zhong Chen ◽  
Liyou Pan
Keyword(s):  
Research Work ◽  
Surface Subsidence ◽  
Deep Mining ◽  
Global Positioning ◽  
Coal Wall ◽  
The Face ◽  
Surface Subsidence Control ◽  
The Common ◽  
And Control ◽  
Overlying Strata

The stratum movement and surface subsidence is considered as a whole system in the research work. The key of the surface subsidence control lies first in having thorough knowledge of the dynamic changeable of the overlaying strata movement as the face advances so as to establish the corresponding structure mechanics subsidence model in flat seam and deep mining. The common characteristic of stratum movement and the development procedure of crack arch are described in this paper. The structure constituents of subsidence and their influencing factors are also analyzed. Meanwhile, the surface subsidence is determined by the compressing of coal wall and the bending of the overlying strata. Based on the ground observation by the global positioning system, the boundary angle and the motion angle are determined. Furthermore, according to the research law, one can predict and control the surface subsidence damages for the special geologic conditions.

Study on the Ground Settlement Regularity Caused by Deep Caving Method

2014 ◽  
Vol 670-671 ◽  
pp. 907-911
Author(s):  
Shu Xiang Wei ◽  
Yun Yong Wang ◽  
Chang Yu Jin ◽  
Long Bin Dong ◽  
Dong Liu
Keyword(s):  
Stress Distribution ◽  
Finite Difference ◽  
Finite Difference Method ◽  
Rock Mechanics ◽  
Surface Subsidence ◽  
Ground Settlement ◽  
Deep Mining ◽  
Mining Depth ◽  
Displacement Angle ◽  
The Finite Difference Method

With the increase of mining depth, rock mechanics conditions become complicates. So the surface subsidence law caused by deep mining is different from the shallow. Based on the finite difference method and rock mechanics theory, the surface subsidence law cased by deep caving mining was studied, the strata movement rule and characteristics of stress distribution of different excavation stage was analyzed systematically. The results of the study can provide certain reference significance for the deep mining to confirm the displacement angle and range of surface subsidence.

scholarly journals Surface Subsidence Control during Deep Backfill Coal Mining: A Case Study

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Baiyi Li ◽  
Nan Zhou ◽  
Wenyue Qi ◽  
Ailing Li ◽  
Zhizhong Cui
Keyword(s):  
Coal Mining ◽  
Mining Area ◽  
Filling Ratio ◽  
Surface Subsidence ◽  
Integral Model ◽  
Resource Exploitation ◽  
Machine Material ◽  
Deep Mining ◽  
Backfill Mining ◽  
Surface Subsidence Control

Deep resource exploitation is imperative, but it is facing with more complicated mining environment and more dangerous mining disturbances to induce the potential catastrophe process. Solid backfill technology, which can control the strata movement and prevent potential hazards, has been used as the primary method in deep mining for surface subsidence control and ecosystem protection. In this study, taking backfill mining area no. 930 in the Tangkou coal mine as background, the probability integral model was adopted to predict the surface subsidence at different mining depths and filling ratios. The filling ratio was designed for deep mining based on the regression analysis of the predicted surface subsidence results. The study shows that the backfilling ratio at the Tangkou deep coal mining area should be controlled at a level greater than 82.5%, and the mining damage to the surface under this condition was analyzed. Furthermore, control strategies for deep backfill mining are proposed in which the backfill density can be enhanced by optimizing the tamping machine, material composition, and tamping process. Finally, the measurement of the backfill mass and surface subsidence showed that the actual filling ratio was controlled at 82.57%, which ensures adequate protection of the surface buildings during the mining process.

Geomechanics Research with Critical Depth Prediction and Surface Subsidence Range Controlling

2014 ◽  
Vol 952 ◽  
pp. 155-160
Author(s):  
Jian Ming Zheng ◽  
Feng Yu Ren ◽  
Lie Xian Tang
Keyword(s):  
Friction Angle ◽  
Surface Subsidence ◽  
Control Surface ◽  
Critical Depth ◽  
Deep Mining ◽  
Depth Prediction ◽  
Rock Stability ◽  
Bulk Solid ◽  
Support Force ◽  
And Control

Traditional subsidence range prediction by stagger angle doesn’t adapt to production situation in deep mining, the angle is usually large. Analyze the lateral support force of the moving bulk solid in the subsidence pit based on maintaining sidewall rock stability of subsidence pit. While bulk solid thickness of subsidence pit is not less than critical bulk solid column, the active pressure and passive pressure of bulk solid prevent the scaling of sidewall rock together. By analyzing the measured data of subsidence range of Xishimen mine, the height of critic bulk solid column relates to stability of rock, sidewall angle of goaf, internal friction angle, and rock loose coefficient. In deep mining, that filling subsidence pit with waste rock can lower the critical depth and control surface subsidence range.

1842: Catheter Free Potassium-Titanyl-Phosphate (KTP) Laser Photoselective Vaporization Prostatectomy (PVP): Patient Characteristic Analysis

2007 ◽  
Vol 177 (4S) ◽  
pp. 612-612
Author(s):  
Motoo Araki ◽  
Po N. Lam ◽  
Daniel J. Culkin ◽  
Pamela E. Fox ◽  
Glenn M. Sulley ◽  
...  
Keyword(s):  
Potassium Titanyl Phosphate ◽  
Ktp Laser ◽  
Characteristic Analysis ◽  
Photoselective Vaporization

Characteristic Analysis of a Micro DC-DC Converter for Portable Electronic Devices and an Improvement of Transient Response Characteristic

2008 ◽  
Vol 128 (12) ◽  
pp. 1373-1380
Author(s):  
Satoshi Sugahara ◽  
Kouhei Yamada ◽  
Haruhiko Nishio ◽  
Masaharu Edo ◽  
Toshiro Sato ◽  
...  
Keyword(s):  
Transient Response ◽  
Electronic Devices ◽  
Response Characteristic ◽  
Characteristic Analysis
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