Research on non-repeated advance support technology in mining roadway

Abstract

Taking No.12302 roadway of Wangjialing Mine as the research background, the advance support technology was researched by means of field investigation, theoretical analysis and engineering practice. The main problems that should be solved of the advance support are analyzed by field investigation, and the advance support ideas of long-distance support and non-repeted support was proposed. The distance from the peak of the advance concentrated stress to the working face was 8.22 m, and the length of the area affected by the advance mining was 37.09 m through theoretical analysis. Combined with the actual monitoring results of the previous site, the length of the advance support was determined to be no less than 40 m. Considering the support effect of the bolt (cable) support system, the advance support strength was determined to be no less than 267.38 kPa. This way, the long-distance advance support concepts of “pre-active support, one-time bearing, cooperative operatation, and overall support” was proposed, the type of ZLQ3200/18/37 advance support and transportation equipment was developed, the main technical parameters of the support device were introduced, and the long-distance advance support scheme was determined combined with the actual mining geological conditions. Practice shows that the application of long-distance and non-repeated advance support technology is effective, the entry surrounding rock has been well maintained, which can meet the requirements of safety advance support for mining entry.

Keywords

• mining entry
• long distance
• advance support
• non-repeated support
• surrounding rock control
• roadway support