|
|
|
| Directional long borehole drilling technology and application in soft coal seam |
| Chen Weidong1 Wu Yisuo2 |
| Xiangshan Mine, Shaanxi Shanmei Hancheng Mining Co., Ltd.,Weinan 714000, China |
|
|
|
|
Abstract Aiming at the problem of high gas concentration in the upper corner caused by the release of pressure relief gas from the roof and floor cracks to the protective layer working face and goaf in No.3 coal seam of Xiangshan Mine under the influence of mining, combined with the complex geological conditions such as high stress soft coal seam in the outburst mine, the composite drilling and sliding directional drilling technology was adopted, and the ZYL-6000D omni-directional kilometer drilling rig was used to support the spiral drill pipe and YSX18 mine-used measurement while drilling system. The high-pressure nitrogen drilling technology was used to construct directional long boreholes for gas extraction in a working face, and the ' three plugging and two injection ' two-phase sealing technology was used in the extraction boreholes. Finally, the control and drilling technology of directional long drilling in soft coal seam is formed. The test results show that the ZYL-6000D omnidirectional kilometer directional drilling rig with high-strength grooved drill pipe can improve the drilling depth and efficiency. The 'three plugging and two injection 'two-phase sealing method can effectively seal the cracks around the borehole, and the gas extraction concentration is greatly improved. The modular extraction of gas control in directional long boreholes in soft coal seam is realized, which provides a strong guarantee for the safe, efficient and stable development of the mine.
|
|
|
|
|
|
| [ 1 ] 牛心刚，徐 瑞，孙东玲，等. 松软煤层顺层定向钻进技术在杨柳矿的应用试验研究[ J ]. 煤炭技术，2023，42（ 2 ）：47 - 50.
[ 2 ] 袁晨瀚，张壮路，袁晨鑫.煤矿井下碎软煤层定向钻进技术及应用[ J ]. 煤炭技术，2021，40（ 6 ）：45 - 48.
[ 3 ] 赵建国，杨虎伟. 高转速螺旋钻进技术在松软煤层中的应用[ J ]. 煤矿安全，2017，48（ 8 ）：121 - 124.
[ 4 ] 李 宏，郝光生. 高突矿井松软煤层瓦斯抽采钻孔的深孔钻进技术[ J ]. 黑龙江科技大学学报，2019，29（ 6 ）：642 - 647.
[ 5 ] 殷新胜，刘建林，冀前辉. 松软煤层中风压空气钻进技术与装备[ J ]. 煤矿安全，2012，43（ 7 ）：63 - 65.
[ 6 ] 张宏钧，姚 克，张幼振.松软煤层螺旋钻杆与压风复合排渣钻进技术装备[ J ]. 煤矿安全，2017，48（ 7 ）：99 - 102. |
|
|
|
