| 基于单柱齿破岩过程的高压液动冲击回转钻进试验研究 |
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| 引用本文： | 豆旭谦,姚宁平,李秀山,王力,张凯,魏宏超.基于单柱齿破岩过程的高压液动冲击回转钻进试验研究[J].煤田地质与勘探,2022,50(12):170-176. |
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| 作者姓名： | 豆旭谦 姚宁平 李秀山 王力 张凯 魏宏超 |
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| 作者单位： | 1.煤炭科学研究总院，北京 100013 |
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| 基金项目： | 国家重点研发计划课题(2018YFC0808005)；陕西省重点研发计划项目(2018GY-078)；中煤科工西安研究院(集团)有限公司科技创新基金项目(2018XAYMS13) |
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| 摘 要： | 针对煤矿井下穿层钻孔硬岩钻进效率低的难题，基于冲击回转钻进机理和Wassara高压液动冲击器主要特点，分析柱齿在冲击荷载下形成的破碎坑形态，并将其划分为崩解区、密实区、开裂区和弹性区。在此基础之上，对柱齿连续破岩的大间隔冲击和小间隔冲击2种情况进行过程分析，结合淮南潘三矿现场试验条件讨论高压液动冲击回转钻进工艺参数，优选高压液动冲击回转钻进配套钻机、冲击器、钻杆、钻头和清水泵，及主要技术参数。试验结果表明:当清水压力在15 MPa以上时，高压液动冲击回转钻进的平均机械钻速为24.67 m/h，与采用该技术之前的8.48 m/h机械钻速相比提高了约1.9倍；并采用回归分析拟合得到机械钻速与水压之间的线性关系，经过数理统计的F检验，F=8.82大于F0.05(1,7)，验证了回归结果是显著的，机械钻速随水压的增大而线性增大。高压液动冲击回转钻进技术可有效提高煤矿井下硬岩层钻进效率，保障煤矿安全高效生产。
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| 关 键 词： | 单齿柱破岩 连续破岩 高压液动冲击器 冲击回转钻进 硬岩钻进 |
| 收稿时间： | 2022-03-17 |
Experimental study on high-pressure hydraulic percussive rotary drilling based on single-tooth rock-breaking process |
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| Affiliation: | 1.China Coal Research Institute, Beijing 100013, China2.Xi’an Research Institute (Group) Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China3.Geological Exploration Engineering Branch of Huainan Mining (Group) Co., Ltd., Huainan 232052, China |
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| Abstract: | Aiming at the problem of low efficiency of hard rock drilling in crossing borehole in underground coal mine, the morphology of crushing pit formed by column tooth under the percussive load was analyzed based on the percussive rotary drilling mechanism and the main characteristics of Wassara high-pressure hydraulic impactor, and the crushing pit was divided into the four areas of disintegration area, compact area, crack area and elastic area. On this basis, process analysis was performed on the continuous tooth rock-breaking with large and small interval impact. Meanwhile, the technical parameters of high-pressure hydraulic percussive rotary drilling were discussed with reference to the field test conditions of Huainan Pansan Mine. The drilling rig, impactor, drill pipe, drill bit and clean water pump for high-pressure hydraulic percussive rotary drilling were selected preferably, for which the main technical parameters were given. The test results show that the average rate of penetration of high-pressure hydraulic percussive rotary drilling is 24.67 m/h at the clean water pressure above 15 MPa, which is about 1.9 times higher than that of 8.48 m/h without adopting this technology. Besides, the linear relationship between the rate of penetration and water pressure is obtained by regression analysis fitting. According to the F-test of mathematical statistics, the regression results are verified to be significant with F=8.82>F0.05(1,7) and the correlation coefficient, and the rate of penetration increases linearly with the increase of water pressure. Generally, the high-pressure hydraulic percussive rotary drilling technology could effectively improve the drilling efficiency of hard rock borehole in underground coal mine and ensure the safe and efficient production of coal mine. |
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