松软低透气性煤层瓦斯抽采技术研究

doi:10.19286/j.cnki.cci.2023.01.027

Abstract
Figure/Table
References (15)
Related Citation (13)

Download: PDF (0 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to solve the problem of poor coal seam permeability and unsatisfactory pre-drainage effect in Zhaozhuang Coal Mine, based on the stress distribution characteristics around the borehole, a reasonable hole spacing and arrangement can be selected to make the stress superposition effect of the two boreholes, increase the plastic zone range, effectively cover the coal body area between the two boreholes, and improve the coal seam permeability and drainage efficiency. The extraction radius was investigated, and the pre-extraction borehole spacing was designed according to the results of the extraction radius. In the 1308 working face of Zhaozhuang Coal Mine, three kinds of hole arrangement methods, ordinary parallel drilling, parallel encryption drilling and three-dimensional cross drilling, were carried out. The comparison of extraction effects showed that the three-dimensional cross drilling hole arrangement method had the best extraction effect. The secondary repair test of the failed borehole was carried out by means of hydraulic hole washing and lowering the screen pipe. After the repair, the average extraction amount of the borehole was increased by 4.2 times, which effectively prolonged the effective extraction time of the borehole and improved the extraction effect.

Key words： soft low permeability plastic zone infill drilling stereo cross drilling secondary repair

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	Jing Jianqiang
	Li Jiajia

Cite this article:

Jing Jianqiang,Li Jiajia. Research on gas extraction technology in soft and low permeability coal seam[J]. CCI, 2023, 46(1): 98-102.

URL:

http://www.mtyhg.com.cn/EN/10.19286/j.cnki.cci.2023.01.027 OR http://www.mtyhg.com.cn/EN/Y2023/V46/I1/98

[ 1 ] 袁亮. 松软低透煤层群瓦斯抽采理论与技术[ M ]. 煤炭工业出版社，2004. [ 2 ] 任仲久. 水力冲孔技术在低透气性突出煤层瓦斯抽采中的应用[ J ]. 煤炭工程，2019（ 3 ）：65 - 70. [ 3 ] 成艳英. 本煤层钻孔瓦斯抽采失效机制及高效密封技术研究 [ D ]. 北京：中国矿业大学，2014. [ 4 ] 王彦凯，李新娟. 潞安矿区低透气性松软单一煤层立体化瓦斯抽采技术探索[ J ]. 煤炭工程，2010（ 8 ）：49 - 50. [ 5 ] 赵旭生，刘延保，申凯，等. 煤层瓦斯抽采效果影响因素分析及技术对策[ J ]. 矿业安全与环保，2019（ 1 ）：179 - 183. [ 6 ] 魏杰，吴世跃，王飞，等. 突出煤层瓦斯抽采钻孔有效半径与孔壁变形关系研究[ J ]. 煤炭工程，2018（ 7 ）：87 - 91. [ 7 ] 马念杰，李季，赵志强. 圆形巷道围岩偏应力场及塑性区分布规律研究[ J ]. 中国矿业大学学报，2015，44（ 2 ）：206 - 213. [ 8 ] 王晓峰. 钻孔瓦斯有效抽采半径预测方法探讨[ J ]. 煤炭工程，2017（ 2 ）：97 - 99. [ 9 ] 王京生，贾泉敏，刘丰韬，等. 本煤层瓦斯预抽采工艺改进研究[ J ]. 现代矿业，2013，529（ 5 ）：105 - 106. [ 10 ] 张增辉，陈殿赋，黄步青，等. 保德煤矿煤层瓦斯合理预抽期及钻孔布置方式的研究[ J ]. 矿业安全与环保，2012，39（ 2 ）：41 - 44. [ 11 ] 王兆丰，李杰，杨宏民，等. 抽采钻孔封孔失效的二次处理措施[ J ]. 煤矿安全，2015，43（ 5 ）：86 - 88. [ 12 ] 程虹，铭韩颖，乔元栋，等. 低渗煤层顺层钻孔塌堵孔修复增透技术研究[ J ]. 煤炭科学技术，2017（ 11 ）：114 - 118，160. [ 13 ] 范超，李贤忠，苏现波.“三软”煤体抽采钻孔水力修复增透技术研究[ J ]. 煤炭技术， 2015（ 1 ）：209 - 212. [ 14 ] 刘晓，蔺海晓，张双斌，等. 瓦斯抽采钻孔修复机理与应用研究[ J ]. 中国煤炭， 2014（ 1 ）：58 - 60，30. [ 15 ] 李强，叶嗣暄，金新. 松软煤层顺层孔筛管护孔工艺及装备应用[ J ]. 煤炭科学技术，2017（ 6 ）：147 - 151.