Research on Application of Gyro Directional Technology in Coal Mine Shaft Survey

2021 ◽  
Keyword(s):  
Coal Mine ◽  
Mine Shaft ◽  
Research On Application

scholarly journals Mechanism of Reinforcement on Inwall of Coal Mine Shaft Wall

2013 ◽  
Vol 5 (18) ◽  
pp. 4546-4551
Author(s):  
Jinlong Liu ◽  
Luwang Chen ◽  
Jili Wang
Keyword(s):  
Coal Mine ◽  
Mine Shaft ◽  
Shaft Wall

scholarly journals Deflection Mechanism and Safety Analysis of Coal Mine Shaft in Deep Soil Strata

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Jihuan Han ◽  
Jiuqun Zou ◽  
Chenchen Hu ◽  
Weihao Yang
Keyword(s):  
Coal Mine ◽  
Rational Design ◽  
Coal Pillar ◽  
Design Parameters ◽  
Deep Soil ◽  
Mine Shaft ◽  
Dynamic Prediction ◽  
Probability Integral Method ◽  
Mining Conditions ◽  
Shaft Deflection

The main shaft and auxiliary shaft in the Guotun Coal Mine underwent large deflections, with deflection values of 359 mm and 322 mm, respectively. These two deflections represent the first occurrence of such large vertical shaft deviations in the soil strata in China. The deflection problem has seriously affected the hoisting safety and lining safety and has become a serious impediment to the sustainable production of mines. Therefore, the deflection mechanism must be determined. For this purpose, based on mining subsidence theory, the spatial probability integral method and a more accurate time function were used to establish a model, called 3D dynamic prediction model, for predicting the shaft movement. The formulas for calculating the lining stress caused by coal mining were based on established models. With measured shaft deflection data, the prediction parameters for deep soil strata were calculated on the basis of an inversion analysis. A comparative analysis of measured and calculated deflection values revealed that the reason for shaft deflection in Guotun Coal Mine is the insufficient size of the protection coal pillar (PCP); namely, the design parameters of the PCP in current codes are not applicable to the deep soil strata. As a result, under the asymmetric mining conditions, mining causes the shaft to deflect without damage and under the symmetric mining conditions, mining causes the lining to fracture. The results have an extremely important significance for the prevention and control of shaft deflection, for the rational design of PCP, and for the sustainability of mine production.

Optical fiber sensors for coal mine shaft integrity and equipment condition monitoring

2019 ◽  
Author(s):  
Feng Zhu ◽  
Gonghua Wang ◽  
Tongyu Liu ◽  
Gang Ma ◽  
Kenneth T. V. Grattan ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Condition Monitoring ◽  
Coal Mine ◽  
Optical Fiber Sensors ◽  
Mine Shaft ◽  
Fiber Sensors

Experimental Study on Impermeability and Frost Resistance of High Strength Concrete Used in Shaft of Coal Mine

2011 ◽  
Vol 287-290 ◽  
pp. 1019-1023
Author(s):  
Jing Feng Hou ◽  
Dong Ming Guo ◽  
Hui Dong Xu ◽  
Zeng Kun Yang
Keyword(s):  
Coal Mine ◽  
Frost Resistance ◽  
High Strength Concrete ◽  
High Strength ◽  
Mineral Admixture ◽  
Cement Stone ◽  
Mine Shaft ◽  
Strength Concrete ◽  
Overburden Soil ◽  
Thick Overburden

This paper presents results of impermeability and frost resistance tests of a series of high strength concrete which will be used in Yuncheng coal mine shaft lining. And the shaft is one of the most difficult to construct using freezing method because of the extreme thick overburden soil. The results show the impermeability and frost resistance of the selected concrete mix proportion options can meet the special requirements of the shaft construction. It’s due to the low water-cement ratio, admixture and water-reducing agent decreases void caused by excess water. And the composite mineral admixture forms bubbles to cut off the tiny water permeable channels in cement stone. Also the filling effect and pozzolanic effect caused by fly ash contribute a lot. The research on high strength concrete used in shaft of coal mine with thick overburden soil is still rare worldwide.

scholarly journals A Concrete Coal Mine Shaft

1909 ◽  
Vol 67 (1722supp) ◽  
pp. 8-8
Author(s):  
Day Allen Willey
Keyword(s):  
Coal Mine ◽  
Mine Shaft

Short-term warning and integrity monitoring algorithm for coal mine shaft safety

2014 ◽  
Vol 24 (11) ◽  
pp. 3666-3673
Author(s):  
Jian WANG ◽  
Xing-long TAN ◽  
Hou-zeng HAN ◽  
T.B. AFENI
Keyword(s):  
Coal Mine ◽  
Short Term ◽  
Mine Shaft ◽  
Integrity Monitoring ◽  
Monitoring Algorithm

scholarly journals Design and Research of Intelligent Safety Monitoring Robot for Coal Mine Shaft Construction

2021 ◽  
Vol 2021 ◽  
pp. 1-16
Author(s):  
Wenjun Fu ◽  
Ying Xu ◽  
Liangping Liu ◽  
Liang Zhang
Keyword(s):  
Coal Mine ◽  
Safety Monitoring ◽  
Development Trend ◽  
Mine Shaft ◽  
Technical Device ◽  
Mechanism Control ◽  
Platform Development ◽  
Walking Mechanism ◽  
Study Designs ◽  
The Development Trend

This study analyzes the main causes of accidents in the period of coal mine shaft construction and the shortage of the existing safety monitoring technology, puts forward the intelligent safety monitoring robot technology based on shaft construction, and deeply investigates the functions that the safety monitoring robot should have. Besides, the research objective of intelligent safety monitoring robot for shaft construction is pointed out, and the research is carried out from such aspects as the robot body structure, walking mechanism, adsorption mechanism, control, communication, intelligent sensing, hazard source recognition, recognition of explosive detonators, and software platform development. As well, this study designs the technical device of intelligent safety monitoring robot for shaft construction, defines the characteristics of this technology, expounds the important significance of studying this technology, and indicates the development trend of this technology.

Microgravity Production for the Test Capsule Falling Through the Drop Shaft

1994 ◽  
Vol 6 (4) ◽  
pp. 322-326 ◽  
Author(s):  
Hideyo Sakurai ◽  
◽  
Shinobu Saito ◽  
Takao Azuma ◽  
Mitsuru Muto ◽  
...  
Keyword(s):  
Coal Mine ◽  
Microgravity Experiment ◽  
Mine Shaft ◽  
Drop Shaft

The world’s deepest drop shaft facility for microgravity experiment, using a former coal mine shaft of 710m in depth was constructed at Kamisunagawa, Hokkaido, Japan in 1991. The rocket-shaped capsule, in which experimental devices are loaded, falls through the drop shaft and produces microgravity of approximately 1 × 10-5G for 10 seconds. This paper provides an outline of this drop shaft facility.

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