Research on goal-setting method of rock drivage based on the balance among period, cost and quality

Abstract

On the basis of the analysis on the disadvantages of the original goal-setting about rock drivage, this paper defined the “life cycle quality”. With project management theory and the Cobb-Douglas function, “quality-cost and quality-price curve model” and the “total cost-period prediction model” were built. Then the goal-setting method of the balance among quality, cost and period of rock drivage was constructed by finding “life cycle cost” through “life cycle quality” using “quality-cost and quality-price curve model” and ensuring period through “life cycle cost” using “total cost-period prediction model” (hereinafter referred to as the “three goals balance method”). “Value contribution” which is the value of the contribution to a mine because of rock drivage, was found in the process of constructing the “quality-cost and quality-price curve model”. An industrial test was done in coal mine A with the research results, staff footage efficiency improved by 24.24%, the period shortened by 14.3%, the “life cycle cost” dropped by 2.09%, the “life cycle quality price” improved by 3.29%, and value contribution increased by 25.3%. The result shows that the new goal method setting on the basis of coal mine profit maximization can ensure construction period. At the same time, it can realize cost and quality objectives and the optimization and balance of relationship among them; rewarding excavation teams by “value contribution” can combine organizational goal with personal goal, it significantly raise the employee’s work efficiency.