6~10 m厚煤层超大采高液压支架及其工作面系统自适应智能耦合控制

Adaptive intelligent coupling control of hydraulic support and working face system for 6−10 m super high mining in thick coal seams

厚煤层储量及产量占我国原煤总储量及产量的一半,通过梳理厚煤层开采历史沿革,总结了我国厚煤层开采40年来的技术及装备研发实践,系统分析了以高端大采高液压支架及围岩智能耦合理论为代表的6~10 m大采高综采高效智能化综采技术及装备研究进展,提出了大采高支护理论及围岩智能耦合控制的突破是厚煤层一次开采高度突破的首要因素,完善的感知体系建立是液压支架自适应支护的前提,数字技术的应用为大采高工作面高效推进及装备智能协同控制提供了新的技术途径;阐明了大采高综放液压支架与围岩耦合关系,剖析了采高增加对硬煤层冒放性的有利影响,提出了基于煤矸识别、放煤机构控制的“纯煤段记忆放煤+煤岩分界模糊段人工反馈式干预放煤”的智能放煤控制策略;分析了大采高开采“采–运”协同智能耦合控制关键技术,构建了基于采煤机牵引速度与刮板输送机链速间联动调节的工作面装备间多机异构耦合自适应协同控制模型;研发了厚煤层开采中10 m超大采高液压支架,分析了厚煤层开采不断突破开采高度极限的新认识,从开采装备、控制系统等方面提出厚煤层一次开采高度的突破的研发方向。

The reserves and production of thick coal seams account for half of the total reserves and production of raw coal in China.By combing the history of thick coal seam mining,we summarize the technology and equipment development practice of thick coal seam mining in China over the past 40 years,explained the development history from the introduction of large mining height technology and equipment to the successful development of the first domestic large mining height hydraulic support to the world’s first 8m-class large mining height comprehensive mining face production.Summarizing the research progress of high-efficiency and intelligent comprehensive mining technology and equipment for large mining height,represented by high-end large mining height hydraulic support and intelligent coupling theory of surrounding rock.Clarifying that the breakthrough of large mining height support theory and intelligent coupling control of the surrounding rock is the primary factor for the breakthrough of the primary mining height of thick coal seam.The establishment of a perfect perception system is a prerequisite for the adaptive support of the hydraulic support.The application of digital technology provides a new technical way for efficient advancement of large mining face and intelligent cooperative control of equipment.Clarified the coupling relationship between large mining height integrated release hydraulic support and surrounding rocks,illustrates the favorable influ-ence of increasing mining height on hard coal seam venting,then an intelligent coal discharge control strategy based on coal gangue identi-fication and coal discharge mechanism control,which includes“pure coal segment memory coal discharge+coal rock boundary fuzzy seg-ment manual feedback intervention coal discharge”is proposed.The key technology of intelligent coupling control for large-scale mining and transportation cooperation is pointed out.It is pointed out that the multi machine heterogeneous coupling adaptive collaborative con-trol between working face equipment is a key factor for the success of intelligent mining.The linkage adjustment between the traction speed of the shearer and the chain speed of the scraper conveyor is a necessary means to adapt to large-scale mining and transportation.Then research and development directions for breakthroughs in the height of primary mining of thick coal seams from the aspects of min-ing equipment,control systems are proposed.