|
|
|
| Application of Single-acting Double-tube Core-drilling Technique in Unconsolidated and Fracture Strata |
| HAO Yong-sheng |
| The Third Railway Survey and Design Institute Group Corporation, Tianjin 300251, China |
|
|
|
|
Abstract Research purposes：In the course of the geological survey for Tianjin-Qinhuangdao Passenger Dedicated Line, the core-drilling ratio was very low in unconsolidated and fracture strata or in soft inter layer, even the rock core was burnt, polluted and its structure was damaged when using conventional drilling techniques because the rock core suffered the wash of the fluid, vibration of the drilling bit and the friction of the inner tube. It could not meet the railway prospecting criterion, so the drilling technique must be improved.
Research conclusions：(1) The applicable test of drilling showed the Single-acting Double-tube diamond bit could prevent the wash of the fluid, reduce the vibration of the drilling bit and remain the original core structure, therefore to avoid the pollution and burnt damage to the rock core. (2) Application of the Single-acting Double-tube diamond bit could enhance the core-drilling ratio to 91% maximally and the core-drilling ratio could meet the the railway prospecting criterion. (3) There were some problems in using the Single-acting Double-tube diamond bit, so the method of using Single-acting Double-tube diamond bit still could be improved in further tests and applications.
|
|
Received: 24 February 2010
|
|
|
|
|
|
[ 1 ] 鄢泰宁.岩土钻掘工程学[M]. 武汉: 中国地质大学出版社, 2001.
Yan Taining. Geotechnical Drilling and Engineering[M]. Wuhan: China University of Geosciences Press, 2001.
[ 2 ] 汤凤林,?··加里宁, 杨学涵. 岩芯钻探学[M]. 武汉: 中国地质大学出版社, 1997.
Tang Fenglin,?··Kalinin, Yang Xuehan. Core Drilling School[M]. Wuhan: China University of Geosciences Press, 1997.
[ 3 ] 白福春. 露天煤矿边坡勘探提高岩芯采取率的施工工艺探讨[J]. 露天采矿技术, 2008(2): 15-18.
Bai Fuchun. To Slope Exploration to Increase the Rate of Core Construction Technology[J]. Opencast Mining Technology, 2008(2): 15-18.
[ 4 ] 罗军. 松散地层取芯技术在小M2井煤层取芯中的应用[J]. 钻采工艺, 2007(4): 159-160.
Luo Jun. Loose Formation Coring Wells in Small M2 Seam to Take the Application in Mind[J]. Drilling & Production Technology, 2007(4): 159-160.
[ 5 ] 陈协理. 高岭土矿取芯钻具研制及使用效果[J]. 探矿工程, 1987(6): 42-44.
Chen Xieli. Kaolin Mine Development and Use of Core Drill Results[J]. Exploration Engineering, 1987(6): 42-44.
[ 6 ] 贾正海, 肖引学. 金刚石单动双管钻具的常见问题及改进措施[J]. 探矿工程2001(S1): 157-158.
Jia Zhenghai, Xiao Yinxue. Single-action Double Barrel Drill Diamond Common Problems and Improvements[J]. Exploration Project(S1), 2001: 157-158.
[ 7 ] 乌效鸣, 胡郁乐. 钻井液与岩土工程浆液[M]. 武汉: 中国地质大学出版社, 2002.
Wu Xiaoming, Hu Yule. Slurry Drilling and Geotechnical Engineering[M]. Wuhan: China University of Geosciences Press, 2002.
[ 8 ] TB 10012—2001, 铁路工程地质勘察规范[S].
TB 10012—2001, The Standard Railway Engineering Geological Investigation[S].
[ 9 ] 高大汪. 隔水双管单动在高岭土矿层中的应用[J]. 探矿工程, 1984(4): 57-58.
Gao Dawang. Drain and Dual Single-action in the Kaolin Seam Application[J]. 1984(4): 57-58.
[ 10 ] 姚文明. 改进钻探技术提高岩芯采取率[J]. 水利水电工程设计, 2000(1): 23-24.
Yao Wenming. Improved Drilling Technology to Improve the Core Rate[J]. Water Resources and Hydropower Engineering, 2000(1): 23-24.
|
|
|
|
2010, Vol. 27 
