| Formation of methane hazard in longwall coal mines with increasingly higher production capacity |
| |
| 作者姓名： | Krause Eugeniusz and Skiba Jacek |
| |
| 摘 要： |
|
| 收稿时间： | 10 October 2013 |
Directional drilling in unstable environments |
| |
| Krause Eugeniusz and Skiba Jacek.Formation of methane hazard in longwall coal mines with increasingly higher production capacity[J].Mining Science and Technology,2014,24(3):397-401. |
| |
| Affiliation: | 1. VLI Pty Ltd, Beresfield, NSW 2322, Australia;2. Faculty of Engineering and Information Sciences, University of Wollongong, Wollongong, NSW 2522, Australia;1. Drilling Division, Valley Longwall International Pty Ltd., Thornton, New South Wales 2322, Australia;2. School of Civil, Mining & Environmental Engineering, University of Wollongong, Wollongong, New South Wales 2522, Australia;1. School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia;2. School of Mechanical, Mechatronic and Material Engineering, University of Wollongong, Wollongong, NSW 2522, Australia |
| |
| Abstract: | Directional drilling has been established in the coal industry as a viable means of gas drainage, exploration and water management. But the environment in and around coal seams is not always conducive to stable conditions while drilling and borehole stability after the drilling has been completed. This paper identifies the conditions which cause unstable drilling conditions and the various means which are used to attempt to manage or bypass those conditions. Ultimately, equipment does become bogged in these adverse environments and requires recovery by over-coring. |
| |
| Keywords: | Directional drilling Borehole Stability Unstable drilling conditions Over-coring |
| 本文献已被 CNKI ScienceDirect 等数据库收录！ |
|
