Study On Resource Allocation And Schedule Control Of Rock Roadway Drivage Method By Drilling And Blasting

Rock roadway is the artery of the coal production,but in our country,there has always been the problem of "mining lightly excavating".At the same time along with the increasing of coal output in our country,the contradiction of "mining excavation" is outstanding,which puts higher requirement on the scale of rock drivage projects Therefore,it is of great practical significance and social value to improve the speed of drivage to realize the balance of mining and ensure the normal production of coal resources.In order to solve the problem of scientific allocation of construction resources and schedule control in rock roadway tunneling,firstly,the research status and related theories of rock roadway tunneling schedule were sorted out by field investigation and literature analysis.Secondly,based on the theory of linear programming,the resource allocation model of maximum monthly penetration and minimum cost of rock roadway drivage construction scheme is established.Then,based on the key chain theory,the above model is optimized to make it conform to the realistic conditions,and a buffer monitoring method is proposed to improve the progress control effect.Finally,the optimized cost-saving model is selected for empirical study,and the completion rate prediction of the original scheme and the cost-saving scheme is carried out through normal distribution and the implementation effect is compared and analyzed,which verifies the validity of the resource allocation model,schedule optimization based on the key chain and completion rate prediction method,and provides a reference for the resource allocation and schedule management of roadway drivage engineering.The results show that:(1)The traditional rock roadway drivage engineering does not fully consider the allocation of resources,and the rationality of the construction scheme is still to be discussed,which limits the upper limit of the efficiency of the drivage schedule.The resource allocation model based on linear programming makes up for the defect of traditional construction scheme resource allocation relying on experience.Through the selection of equipment and the collocation of personnel,it can solve the problem of scientific allocation of mechanized equipment and personnel applicable to different section conditions,ensure the completion of the project,reduce the consumption of resources,and improve the construction efficiency.(2)Through the key chain theory,the resource allocation model is optimized to balance resource conflicts and reduce resource constraints,so that the resource allocation model is more in line with the realistic conditions,and zero waiting,coordination and efficient process construction are realized,so as to improve the completion rate of rock roadway drivage engineering.(3)In view of the lack of dynamic supervision and the existence of many uncertain factors in the progress management of traditional rock roadway drivage engineering,buffer supervision can accurately control the progress of key chain and greatly improve the efficiency of progress management by setting the buffer zone of key chain to absorb the influence brought by the uncertain factors of the project and combining the completion amount of the project with buffer consumption.(4)Combined with engineering practice,under the premise that the completion rate is close to 100%,the extension time required for single cycle operation is reduced from the minimum 82 minutes to 13.27 minutes through the optimization scheme of monitoring the key chain process buffer.The above results show that the key chain control can realize the effective management of rock roadway drivage schedule.