【摘 要】
：
The surface subsidence process associated with Iongwall mining operations isoften capable of causing disturbances to various surface structures. Inadequate consid-erations of the subsidence influences could result in poor public relation with local resi-d
【机 构】
：
Department of Mining Engineering, West Virginia University, Morgantown WV 26506, USA
论文部分内容阅读
The surface subsidence process associated with Iongwall mining operations isoften capable of causing disturbances to various surface structures. Inadequate consid-erations of the subsidence influences could result in poor public relation with local resi-dents and regulatory agencies, uneconomic operations, hazardous conditions, etc. A sys-tematic approach to assess and mitigate influences caused by Iongwall subsidence hadbeen developed and adopted to minimize the severity of these potential problems. Theapproach included accurate prediction of final and dynamic surface movements and de-formations, assessment of the severities and locations of the potential disturbances, anddesign and implementation of proper mitigation measures. The approach had been suc-cessfully applied at many Iongwall mining companies on numerous and various residential,farming, public and industrial structures. As a matter of fact, the state of Pennsylvania, thestate with largest number of Iongwall mines and highest Iongwall production in U.S., wouldlike to use such approach as the standards in dealing with Iongwall subsidence cases.
其他文献
Factors of occupation health hazard were identified and analyzed, and indexes system of occupation health risk assessment were established by applying fuzzy theory and system safety technique, the weights of index system were obtained by AHP, finally a re
According to the structural characteristics of gently inclined thin layer rock mass in which lots of weak interlayer existed, the concept of gently inclined thin layer weakness structure was proposed. If single-borehole measuring method of the acoustic al
The multiple linear regression equations for adsorption ratio of CO2/CH4 and its coal quality indexes were built with SPSS software on basis of existing coal quality data and its adsorption amount of CO2 and CH4.The regression equations built were tested
Based on the mechanism analysis of space form caused by blasting with linear charges, elastic-plastic model of space form caused by blasting was established in this paper. In terms of state equation of blasting and the balance of quality, evaluation formu
The unknown parameter\'s variance-covariance propagation and calculation in the generalized nonlinear least squares remain to be studied now,which didn\'t appear in the internal and external referencing documents. The unknown parameter\'s variance-c
Proposed a novel approach to detect changes in the product quality of process systems by using negative selection algorithms inspired by the natural immune system.The most important input variables of the process system was represented by artificial immun
Based on the rigorous situation of safety production in coal mines, the paper analyzed the statistical data of recent accidents indexes in Henan\'s coal mines. Using investigation and comparison analysis methods, a specified analysis on mining condition
According to the results evaluated by researchers for mode Ⅰ rock fracture toughness measurement, a series of comparison tests with different types Brazilian discs were conducted in order to search for the simplest geometry specimens by which accurate,com
In order to discover the airflow pattern in mine shaft which Outfitted with hoist equipment(HE),this paper set up the physical model and anatomized the piston-wind caused by hoist equipment,and researched the flow field and velocity field around the hoist