Design and selection of abandonment technology in large mining height working face
Aiming at solving the difficulties of abandonment technology in large mining height face,based on the conditions of rib spalling,equipment up-sizing,mine pressure intensifying and big section of dismantling gateway,three plans for abandonment technology was put forward,including advanced stopping mining method,direct breakthrough method and filling breakthrough method.According to the engineering practice of abandonment technology in No.4321 high mining height working face at Changping Mine,the value coefficients for three plans were analyzed and calculated using value engineering theory.The results show that the value coefficient of the filling breakthrough method is higher than other two methods,which is the optimal technical plan of the three in this working face.Practice shows that the filling breakthrough method has the advantages of simple construction technology,short construction period,high resource recovery rate and high level of security,which can achieve the goal of safe,efficient and fast abandoning in large mining height working face.
large mining height"knife handle"working facedirect breakthrough methodfilling breakthrough methodvalue engineering
NETL
NSTL
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