【摘 要】
:
The forms of roof break,roof fall,and effects of the region scope in a fully me-chanized top-coal caving (FMTC) face of the 101 fully-mechanized top coal caving face of the Tingnan Coalmine were analyzed by UDEC and FLAC software.The analysis result confi
【机 构】
:
School of Energy Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Departmen
论文部分内容阅读
The forms of roof break,roof fall,and effects of the region scope in a fully me-chanized top-coal caving (FMTC) face of the 101 fully-mechanized top coal caving face of the Tingnan Coalmine were analyzed by UDEC and FLAC software.The analysis result confirms the phenomenon of roof falling,roof-off-strata,roof breaking,first weighting,pe-riodic weighting and stress concentration,redistributions of surrounding rock and so on.It provides the gist to analyze the law of roof movement,characteristic of confining pressure,and to determine the formative structure forms of the immediate roof and main roof during the caving process.These results and the underground pressure observation results are in agreement.
其他文献
Based on statistical damage mechanics, the constitutive model of a rock under three-dimensional stress was established by the law that the statistical strength of rock micro-element obeys Weibull distribution. The acoustic emission (AE) evolution model of
The velocity of an over-burst coal seam is about 1/3 compared to a normal coal seam based on laboratory test results. This can be considered as a basis to confirm the area of coal and gas burst by seismic exploration technique. Similarly, the simulation r
Through the description of the deformational features of the surrounding rock around high stress engineering soft rock roadways,the coupling stabilization principle of inner and outer structures in surrounding rock was put forward.The supporting principle
Triaxial creep tests on CCG specimens were systematically performed using a self-made creep seepage experimental apparatus for determining the creep law of CCG. An improved triaxial creep model of CCG was established on the basis of a Nishihara model and
In order to enhance coalbed methane recovery, taking a self-developed largecale simulation system for the platform, a modeling experiment of driving CH4 by CO2 gas injection was studied. The results of experiment indicates that there is a significant lag
Under two rock strata combination conditions, over 10,000 microseismic events were received with microseismic location monitoring technology which possessed by the author\'s studying team, used in fully mechanized coal face of Huafeng Mine of Xinwen Coa
According to the research results of motion parameters of coal-gas flow, ana-lyzed the formation mechanism of shock waves at different states of coal-gas flow in the process of coal and gas outburst, and briefly described the two possible cases of outburs