【摘 要】
：
Work face 3312 of coal mining in a colliery was taken as an example in whichmethane data in a series of locations was analyzed. For the purpose of data analysis,work face 3312 was divided into sections with 20 powered supports and some measur-ing-points i
【机 构】
：
School of Energy Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
论文部分内容阅读
Work face 3312 of coal mining in a colliery was taken as an example in whichmethane data in a series of locations was analyzed. For the purpose of data analysis,work face 3312 was divided into sections with 20 powered supports and some measur-ing-points in a section. Through analysis based on the sectional control volume model, thefollowing points are concluded: (1) the location of gob air flow begins flow into coal face in70 m away from the haulage gallery; (2) in the control volumes No.10 and No.30, the ra-tios of methane intensity from coal face into gob to the methane intensity in the corre-sponding control volume are 30% and 22%; (3) in the control volume No.50 to No.110, theratios of methane intensity from gob into coal face to the methane intensity in the corre-sponding control volume are 4%, 17%, 22% and 53%, respectively.
其他文献
The technique of data mining was provided to predict gas disaster in view of thecharacteristics of coal mine gas disaster and feature knowledge based on gas disaster.The rough set theory was used to establish data mining model of gas disaster prediction,a
Geological structure and gas expansion when gas pressure was released can affect the distribution of infrared radiation energy or temperature at coal-rock surface. From this, the foundation of roadway infrared surveying technical was formed. According to
For a safe extracting of the mine resource of the razor-thin capping rock, a study of waterproof, sand prevention, roof-fall prevention must be made. As a result, its necessary to master the engineering feature of weathering zone of bedrock. According to
The damage constitutive relation of entire rock failure process was established using the theory of representative volume element obeying the Iognormal distribution law,and the integrated damages constitutive model of rock under triaxial compression was e
Based on safety management appraisal theory, the decision system was divided into 5 function menu module, including system control module, mining coal and the tunneling working surface security evaluation module, the entire ore safety production condition
It is showed in practice that the support load and its fluctuation is large, the periodic weighting is obvious and can be divided into two kinds, the large and small pressure, sometimes the behavior of the large pressure is very violent in hard thick seam
The distributions of strata rock temperature around a driving head with auxiliary ventilation were analyzed theoretically based on a program which was developed by the authors to predict the thermal environmental conditions in a development heading with f
The application of the finite layer & triangular prism element method to the 3D ground subsidence and stress analysis caused by mining is presented. The layer elements and the triangular prism elements have been alternatively used in the numerical simulat
Based on the traditional optimization methods about the pressure control spring of the relief valve and combined with the advantages of neural network, this paper put forward the optimization method with many parameters and a lot of constraints based on n
Taking the practical reinforced engineering of a reinforced soil retaining wall as an example, which located in Shandong Province and set on 104 national highway, the stress-spread behaviors of the anchor bars in the preforced proceeding were tested. Acco