工作面支护与液压支架技术理论体系

工作面支护是安全高效综采的首要条件,液压支架是综采系统的核心。笔者和其合作团队持续30多年致力于综采工作面支护与液压支架技术理论的研究和实践,建立了综采工作面支护与液压支架技术理论体系框架,提出了液压支架与围岩耦合原理,建立液压支架与围岩耦合模型,分析了液压支架与围岩的强度耦合、刚度耦合和稳定性耦合规律,阐述了液压支架合理工作阻力、临界护帮力和支护系统稳定性控制策略,提出液压支架三维动态优化设计理论和方法,将围岩下沉、断裂等力、力矩以及边界条件的变化通过液压支架骨架模型传递和分解到具体的液压支架结构上,借助三维设计平台动态模拟仿真液压支架与围岩耦合作用的力学特征,优化得出对围岩最优支护效果的液压支架结构参数。提出液压支架系列型谱和工作面支护系统液压支架群组的自组织协同控制方法,将支护系统群组自组织协同控制分解为围岩自适应控制和队列保持推进控制两个控制线程,同步实现群体系统协调控制。建立了工作面支护设备技术标准体系。

Theory system of working face support system and hydraulic roof support technology

The support of working face is a prerequisite for efficient and safe mining.Hydraulic roof support is the core of longwall mining system.The author and his team have specialized in the research and practice of working face support and technology theory of hydraulic roof support for 30 years.The framework of technical theory system of working face support and the hydraulic roof support was established，and the coupling principle of hydraulic roof support and the surrounding rock was also presented.A coupling model of hydraulic roof support and surrounding rock was built and rules of the strength coupling，stiffness coupling and stability coupling of the hydraulic roof support and the surrounding rock were also analyzed.The reasonable working resistance and the critical side protection force of hydraulic roof support and the stability control strategy of the support system were also presented.The theory and method of three-dimensional dynamic optimization design of hydraulic roof support was proposed.By the transfer and decomposition of changes of surrounding rock subsidence，fracture force，torque and boundary conditions to concrete support structures through support skeleton model and the dynamic simulation of mechanical characteristics of support and surrounding rock coupling by means of 3D design platform，the support structure parameters with the optimal supporting effect for surrounding rock was optimized.Series type spectrum for hydraulic roof support and synergetic control method of hydraulic roof support group of the support system of longwall face were proposed.The synergetic control of supporting system group was divided into adaptive rock control and queue maintaining propulsion control to realize the synchronous coordinated control of group system.A technical standard system of the supporting equipment for longwall face was set up.