Experimental research on "drilling-cutting-fracturing" pre-fracturing to prevent rock burst technology for deep hole of roof of coal seam
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摘要: 针对现有顶板定向水力压裂技术中缝槽预制工序繁琐、成缝质量差的问题，提出钻孔、高压水射流切缝、高压水力压裂（钻-切-压）一体化预裂顶板防冲技术，并在葫芦素煤矿进行了试验研究。试验结果表明：“钻-切-压”一体化技术与装备在不退钻杆的前提下能够进行人工切槽，并采用单孔后退式多次压裂，提高了施工效率；使用的对称双孔型高压射流器能够高效形成4~5 mm宽度的人工缝槽，增大了切缝效果，并降低了压裂时裂缝起裂压力，扩展了压裂半径，单轴抗压强度为50~60 MPa的顶板岩层，单次压裂半径最大可达15 m;“钻-切-压”技术弱化顶板使得巷道围岩应力水平降低，临空巷道附近高能微震事件数量大幅减少，微震频次和能量无急剧变化，保证了工作面顺利回采。Abstract: Abstract:In view of problems of complicated process of slot prefabrication and poor quality of seam formation in existing roof directional hydraulic fracturing technology, a technology of drilling, high-pressure water jet cutting and high-pressure hydraulic fracturing (drilling-cutting-fracturing) integrated pre-fracture roof to prevent rock burst was put forward, and experimental research of the technology in Hulusu Coal Mine was carried out. The experimental results show that the "drilling-cutting-fracturing" integrated technology and equipment can cut grooves manually without retreating drill pipe, and use single hole retreating multiple fracturing to improve construction efficiency. The symmetrical double hole high pressure jet device can effectively form a 4-5 mm wide artificial fracture groove to increase fracture cutting effect, reduce fracture initiation pressure,and expand fracture radius. The maximum single fracturing radius of roof strata with uniaxial compressive strength of 50-60 MPa can reach 15 m. The "drilling-cutting-facturing" technology weakens the roof and reduces the stress level of surrounding rock. The number of high-energy microseismic events near the goaf roadway has been greatly reduced, and the frequency and energy of microseismic events have not changed dramatically, so as to ensure the smooth mining of the working face.
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期刊类型引用(9)
1. 杜修宪. 葫芦素选煤厂智能化建设与应用. 煤炭加工与综合利用. 2023(07): 29-32+36 . 
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3. 曹艳军，乔治忠，刘安重. 煤炭洗选智能化建设思路与路径探索. 露天采矿技术. 2022(04): 78-81 . 百度学术
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5. 曹现刚，段欣宇，张梦园，雷卓，李彦川. 煤矿设备状态监测系统设计. 工矿自动化. 2021(05): 101-105 . 本站查看
6. 肖松，赵康. 融合通信技术在巴拉素煤矿的应用. 陕西煤炭. 2021(S2): 143-145+149 . 百度学术
7. 刘文义，李丽，周辉，王文青，周聪. 地震4.0——新一代智能地震技术体系SCPS. 地震地磁观测与研究. 2020(02): 1-14 . 百度学术
8. 张聪瑞，杨旭春，王树勋，黄刚. 高海拔矿山井下运输环境感知技术研究. 金属矿山. 2020(10): 111-117 . 百度学术
9. 李敬兆，孟亦凡，王继伟. 矿山多层级安全态势感知系统. 工矿自动化. 2020(12): 1-6 . 本站查看
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