Synchronous Technology Research And Mechanism Design Of Rock Roadway Excavation And Anchor

In recent years,in order to meet the needs of the major mining connections and achieve rapid excavation,many kinds of "excavation anchors" have emerged in China,but there is a common problem.These equipment are only a simple combination of excavation machines and anchor rigs.Each is still an independent equipment unit,and the "digging" and "anchoring" are still in a sequential relationship.Although the anchor rig is assembled on the body of the digger,the anchor rig is still in the "deactivation" state when the digger cuts coal or breaks the rock.Since the fuselage is in a state of constant movement and swing throughout the cutting process,the anchor rig fixed to the fuselage can not achieve the precise hole and hole,so it can not form an effective hole position,resulting in follow-up Anchorage or Anchorage.The work can not be carried out normally.The main problem brought about by this is that the efficiency of excavation is low,and the number of regular circulation on a single day is small.This paper adopts the design of the sliding connecting frame with the oil tank of the moving slot,so that the cutting part and the anchoring part of the excavator are completely separated and run separately,and can realize the simultaneous operation of cutting and cutting of the excavator and carrying out the top plate and the two gangs anchoring.To realize "parallel operation and synchronous construction of excavation anchors",we can solve the inherent disadvantages of traditional excavation machines from the source and achieve the ultimate goal of improving the efficiency of excavation and support.First of all,through the investigation and analysis of the excavation work site of the rock lane,we understand the production technology of the rock breaking and support,find the key factors that affect the production efficiency,and combine the actual operating conditions of the rock breaking and support equipment.With reference to various materials at home and abroad,the working concept of "simultaneous and parallel operation of excavation anchors" is put forward.A combination mechanism that relies on hydraulic cylinders and sliding mechanisms to achieve the normal advance and retreat of the cutting parts of the unit body relative to the roadway is fixed and fixed.The operating parameters are obtained.Through three-dimensional modeling,a sliding frame designed according to the performance and working conditions of the sliding mechanism is established,and the rock breaking is carried out by moving the cutting mechanism before and after the completion of the whole cutting mechanism under the action of the passing cylinder.The rock breaking and support are separated from each other from the source design.The independent movement and work of the two have been realized.Secondly,Ansys finite element software is used to analyze the statics and dynamics of the key components(sliding frame),check its mechanical properties,and correct the related strength and stiffness parameters,and then verify that the stiffness and strength of the mechanical structure can meet the actual production requirements.In addition,in the actual production process,the operating environment of its hydraulic slotting mechanism is the worst,and its stress situation is also the most complex.The stability and reliability of its system will directly determine the results of on-site safety production.Therefore,based on the operating parameters of the entire machine,by establishing a corresponding mathematical model for the hydraulic system of the passing cylinder,the main factors affecting the passing cylinder are analyzed,and the simulation model of the sliding frame passing hydraulic system is established based on AMESim simulation software.According to the actual working conditions,different external loads and reversing signals are set up,and the dynamic response analysis of the hydraulic cylinder is carried out,so as to achieve the purpose of correcting the hydraulic system of the oil cylinder,and prove that the mechanism is convenient to operate,good regulation,and safe and stable.It has high practical value for roadway excavation construction.Finally,the number and position of the airborne anchor rig are analyzed and studied to maximize the operation efficiency.Too few and too many can not give full play to the advantages of parallel operation and affect the excavation efficiency.In addition,too many airborne anchor drills will occupy the limited working space on the equipment operating platform,increase the risk factor of misoperation,etc.Therefore,it is of great practical significance to design the layout of airborne anchor drills.The optimization design of the layout of airborne anchor drills is also carried out.According to the principle of maximum efficiency,the corresponding relationship between excavation and bolting and their optimal operation time are calculated.The location and quantity of roof bolt drill and side bolt drill are determined,and the operation process and production process are briefly described.Through the above analysis and research,it is shown that the new type of excavating anchor synchronous unit designed and developed can achieve "excavating anchor parallel construction operations" and can meet the actual production needs of underground in terms of safety,operability,and economy.It has a high practical value in solving the dissonance of mine excavation and realizing the rapid excavation construction of rock lanes.This thesis contains 43 figures,5 diagrams,and 90 references.