钻杆类型对松软煤层顺层钻孔排渣的影响
Influence of Drill Pipe Type on Drilling and Slagging in Soft Coal Seam
-
摘要: 针对松软煤层顺层钻孔压风排渣困难的问题,通过现场试验分析2种钻孔施工中风压和风量的变化规律,确定了最小风压及其计算方法。结果表明:由于钻杆结构的不同,相同风压下,三棱钻杆比圆钻杆更容易排渣,在相同深度下圆钻杆的最小供风压力比三棱钻杆大;2种类型钻杆在施工过程中随深度增加风量均呈现下降的趋势,而圆钻杆下降的趋势的绝对量比三棱钻杆大;随着施工深度的增加,2种钻杆钻屑量均呈增加的趋势,在同一深度三棱钻杆明显比圆钻杆钻屑量要大;圆钻杆与孔壁的排渣空间要小于三棱钻杆,在钻进速度相同的情况下,煤屑在三棱钻杆钻孔中的阻塞几率要小于圆钻杆,三棱钻杆更容易将钻屑顺利地排出,而且还有利于瓦斯的排放。Abstract: In view of the problem of pressure air exhaust slag by borehole along the soft coal seam, the minimum air pressure and its calculation method are determined by analyzing the variation law of the air pressure and air volume in the two kinds of drilling construction through the field test. The results show that: due to the different structure of drill pipe, under the same wind pressure, the mitsubishi drill pipe is easier to discharge slag than the round drill pipe, and the minimum air supply pressure of the round drill pipe is greater than that of the triangular drill pipe at the same depth; the air volume of the two types of drill pipe decreases with the increase of the depth during the construction, while the absolute amount of the downward trend of the round drill pipe is greater than that of the mitsubishi drill pipe; with the increase of the construction depth, the cuttings of the two drill pipes show a trend of increasing, at the same depth, the cuttings of mitsubishi drill pipes are obviously larger than that of circular drill pipes; the slag discharge space between the round drill pipe and the hole wall should be less than that of the triangular drill pipe. Under the same drilling speed, the blocking probability of coal cuttings in the drilling of the triangular drill pipe is less than that of the circular drill pipe. The triangular drill pipe is easier to discharge the cuttings smoothly, and it is also conducive to the gas discharge.
-
-
[1] 许江,宋肖徵,彭守建,等.顺层钻孔布置间距对煤层瓦斯抽采效果影响的物理模拟试验研究[J].岩土力学,2019,40(11):1-10. [2] 凌标灿,戴世鑫,曹承平,等.三棱钻杆在中软煤层顺层瓦斯抽排钻孔的应用[J].煤炭科学技术,2009,37(10):44-46. [3] 王坤.松软煤层顺层钻孔成孔工艺技术[J].科技创新与应用,2019(12):98-99. [4] Yiyu Lu, Yong Liu, Xiaohong Li, et al. A new method of drilling long boreholes in low permeability coal by improving its permeability[J]. International Journal of Coal Geology, 2010, 84(2): 94-102. [5] NingpingYao, XinshengYin, Yi Wang, et al. Practice and Drilling Technology of Gas Extraction Borehole in Soft Coal Seam[J]. Procedia Earth and Planetary Science,2011, 3: 53-61. [6] 潘小叶.针对松软突出煤层椭圆钻杆的研制[J].煤矿机械,2012,33(3):153-154. [7] 周松元,赵军,刘学服,等.严重喷孔松软煤层成孔工艺与装备研究[J].湖南科技大学学报(自然科学版),2011,26(4):11-16. [8] 侯红,凌标灿,罗维,等.松软突出煤层中三角型钻杆成孔技术研究[J].煤炭科学技术,2012,40(8):67. [9] Dingqi Li. A new technology for the drilling of long boreholes for gas drainage in a soft coal seam[J]. Journal of Petroleum Science and Engineering, 2016, 137: 107-112. [10] Ji Qianhui. Research and Application of Auger-air Drilling and Sieve Tube Borehole Protection in Soft Outburst-prone Coal Seams[J]. Procedia Engineering, 2014, 73: 283-288. [11] 杨健,肖丽辉.三棱凹槽螺旋钻杆的设计[J].煤矿安全,2014,45(5):103-105. [12] 谢祖平.松软煤层新型螺旋钻杆研制及应用[J].煤矿机械,2019,40(7):143-145. [13] 吕伟伟,隆清明,晁建伟.取样过程中风流对煤样瓦斯解吸规律影响的探讨分析[J].中国煤炭,2016,42(7):83-85. -
期刊类型引用(6)
1. 刘成勇，王翰秋，刘治成，吴继飞，赵萌烨，张新福，刘雪峰，张进鹏. 应力扰动路径对煤岩力学性能的影响试验研究. 煤矿安全. 2024(05): 28-34 . 
本站查看
2. 彭相愿，高富强. 加载角度对煤声发射特征的影响试验研究. 煤矿安全. 2023(02): 121-127 . 本站查看
3. 任昂岭，李加辉，张亚平，卜祥旭，殷正. 煤岩受热及损伤过程的声发射特性研究. 陕西煤炭. 2023(02): 11-15 . 百度学术
4. 朱昌星，安烨明，李伟东. 单轴压缩下透明类岩石损伤演化特征研究. 实验力学. 2022(05): 701-710 . 百度学术
5. 黄晓昇，张超，程成，赵亚婕. 含不同预制裂隙相似试样的注浆诱发劈裂裂隙扩展规律研究. 煤矿安全. 2021(03): 43-48 . 本站查看
6. 高硕，雷瑞德，徐新杭，许石青. 煤岩力学特性降解及声发射信号多参量特征试验研究. 煤矿安全. 2021(06): 17-23 . 本站查看
其他类型引用(10)
计量
- 文章访问数: 19
- HTML全文浏览量: 0
- PDF下载量: 0
- 被引次数: 16
下载:
