College of Mechanical and Electronic Engineering, Shandong University of Science and Technology
College of Mechanical Engineering, Liaoning Technical University

螺旋钻具被广泛应用于矿山开采、探索与安全保障等领域，是矿山设备中的重要组成部分。针对钻具最佳截割转速与输送转速不匹配问题，提出新型分离式钻具结构，实现钻头截割转速与钻杆输送转速独立控制，利用离散元数值模拟与力学分析法分别建立钻头截割比能耗与钻杆输送比能耗数学模型，通过多目标优化理论以钻具截割比能耗和输送比能耗之和最小为目标，对钻具截割与输送参数进行协同优化，优化结果表明：钻具截割与输送总装机功率不变条件下，传统钻具截割与输送共用同一个电机具有功率集中优势，钻具在不同工况下均能达到电机额定功率输出，有效提高钻具进给速度增加钻具单位时间的开采效率，而分离式钻具将电机总功率进行拆分，一部分用于钻头截割，一部分用于钻杆输送，两部分相互独立，钻具开采过程中截割电机额定功率输出，而输送电机输出功率根据物料输送需求进行调整，从而导致输送电机一部分功率不能完全发挥处于闲置状态。由于钻具进给速度较低，当钻杆与钻头转动同速时，将会导致钻杆单位时间输送能力高于钻头单位时间截割能力，造成钻杆一部分做工为无效功，造成电机能耗浪费，而分离式钻具能够根据钻头截割能力对钻杆的输送能力进行匹配，避免输送电机做过多无效功从而降低钻具输出比能耗，并随着钻采深度的增加，分离式钻具低输送比能耗优势逐渐体现。通过制作分离式钻具实物模型，利用试验的方法对分离式钻具协同优化性能进行验证，试验结果表明：相同工况下，钻头与钻杆协同优化后拥有更好的开采性能，相比与传统钻具分离式钻具协同优化后进给速度提高了2.98%，截割比能耗降低了5.63%，输送比能耗降低了0.81%。试验验证了分离式钻具协同优化效果的有效性，为钻具绿色开采提供了参考。

Auger drilling tool is widely used in mining, exploration and security and other fields, is an important part of mine equipment, aiming at the best cutting speed and conveying speed of drill tool mismatch. In this paper, a new type of separated drill tool structure is proposed to realize the independent control of the bit cutting speed and the drill pipe conveying speed. The discrete element numerical simulation method is used to establish the bit cutting specific energy consumption model, and the drill pipe mechanical analysis method is used to establish the mathematical model of drill pipe conveying specific energy consumption. According to the multi-objective optimization theory, the minimum sum of drill pipe cutting specific energy consumption and conveying specific energy consumption is taken as the goal. The collaborative optimization of drilling tool cutting and conveying parameters is carried out, and the optimization results show that: Under the condition of constant total installed power of drilling tool cutting and conveying, traditional drilling tool cutting and conveying share the same motor, which has the power concentration advantage. The drilling tool can reach the rated power output of the motor under different working conditions, effectively improve the feed speed of drilling tool and increase the mining efficiency of drilling tool per unit time, while the separated drilling tool splits the total power of the motor, part of which is used for bit cutting. One part is used for drill pipe conveying, and the two parts are independent of each other. The rated power output of the cutting motor is adjusted in the process of drilling tool mining, while the output power of the conveying motor is adjusted according to the needs of material conveying. As a result, part of the power of the conveying motor cannot be fully played in idle state. Due to the low feed speed of drill pipe, when drill pipe and drill bit rotate at the same speed, the unit time conveying capacity of drill pipe will be higher than the cutting capacity of drill bit, resulting in ineffective work of part of drill pipe, resulting in a waste of motor energy consumption. The separated drill pipe can match the conveying capacity of drill pipe according to the cutting capacity of drill bit. Avoid the conveyer motor to do too much ineffective work so as to reduce the specific energy consumption of drill output, and with the increase of drilling depth, the advantages of low energy consumption of separated drill gradually reflect. By making the physical model of the separated drill tool, the collaborative optimization performance of the separated drill tool is verified by experiments. The test results show that: under the same working condition, the drill bit and drill pipe have better mining performance after collaborative optimization. Compared with the traditional drill tool, the feed speed is increased by 2.98%, the cutting specific energy consumption is reduced by 5.63%, and the conveying specific energy consumption is reduced by 0.81%. The experiment verifies the effectiveness of the collaborative optimization effect of the separated drill and provides a reference for green drilling.

国家自然科学基金重点资助项目（52234005）；国家自然科学基金资助项目（52174120，52174144）

张　强，刘　伟，张润鑫，等. 分离式螺旋钻具截割与输送协同优化研究[J]. 煤炭科学技术，2023，51（11）：179−189.

ZHANG Qiang，LIU Wei，ZHANG Runxin，et al. Research on collaborative optimization of cutting and conveying of separated auger drill[J]. Coal Science and Technology，2023，51（11）：179−189.