[an error occurred while processing this directive]

Coal Engineering ›› 2023, Vol. 55 ›› Issue (7): 115-119.doi: 10.11799/ce202307019

Previous Articles     Next Articles

Analysis and evaluation of safety influencing factors for excavation of main roadway in thick coal seam re-mining area#br#

#br#   

  • Received:2023-04-06 Revised:2023-07-04 Online:2023-07-20 Published:2025-04-07

Abstract:

Abstract: The safety of excavation works should be ensured in the rapid excavation of multiple mining roadway. At present, the roadway in the third mining area of Tenghui Coal industry is excavated under the goaf in the remining area. In order to increase the tunnelling efficiency of the roadway in the third mining area and guarantee the safety of the roadway during tunnelling, analytic hierarchy process (AHP) is adopted to analyze the weight of the major influencing factors of roadway safety, and the safety of the roadway in the remining area under the current tunnelling conditions is evaluated by combining the multi-index comprehensive analysis method. The weights of different factors under current mining conditions are obtained, and the values of different factors are given. Based on the impact factor value and comprehensive analysis method, the safety factor was defined, and the maximum value of the safety factor was determined to be 0.0691 and the minimum value of 0.075. The maximum and minimum value of the safety factor were averaged to divide the roadway safety into five levels. By further introducing the above index value in the driving roadway of the 3 mining area of Tenghui Coal Industry, the safety factor value of the current production conditions is calculated to be 0.2619, and the safety level belongs to the relatively safe range.

CLC Number: