Development and application of integrative jumbo for deep hole sampling

DOI

10.2991/mining-14.2014.40How to use a DOI?

Keywords

coal; deep hole; sampling; integrative jumbo; gas content

Abstract

According to the fact that the coal seam in our country is soft and the traditional sampling equipment is difficult to achieve the required sampling depth, speed, integrity and so on, integrative jumbo of deep hole sampling is designed and built, this jumbo has the properties of large power and small volume, can realize lateral and distant drilling through obstacle, it also has functions of automatic locking positioning, sampling while drilling and positional sampling. The field test of the integrative jumbo showed that the real sampling time of integrative jumbo is just 1 to 2 minutes, providing effective technical means for confirming the lost gas of coal seam. The total weight of coal samples obtained by the test is generally higher than 1000 g, also the weight of coal samples with greater than 1mm diameter exceed 500 g, and to a maximum of 2690 g. The sampling depth and initial desorption velocity have been more improved by integrative jumbo for deep hole sampling than that with traditional sampling method, it can also completely meet the calculation accuracy of initial desorption velocity.

Copyright

© 2014, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Gang Wang
AU  - Xinxiang Yang
AU  - Wei Xiao
AU  - Mengmeng Wu
PY  - 2014/10
DA  - 2014/10
TI  - Development and application of integrative jumbo for deep hole sampling
BT  - Proceedings of the Taishan Academic Forum – Project on Mine Disaster Prevention and Control
PB  - Atlantis Press
SP  - 273
EP  - 281
SN  - 2352-5401
UR  - https://doi.org/10.2991/mining-14.2014.40
DO  - 10.2991/mining-14.2014.40
ID  - Wang2014/10
ER  -