Determination of Development Height of Water Flowing Fractured Zone in Thick Seam Slicing Mining
TANG Xin
JIANG Zhenquan
CAO Dingtao
WANG Zongsheng
Abstract：To counter the Problem of increasing the mining uPPer limit in a certain mine in Yanzhou Coal Mining Area, observation was carried out on the sPace develoPment characteristics and height of the water flowing fractured zone after the mining of the first slice of 5301-1 working face by using the site borehole in-situ sight-glass imaging method,and comParative analysis was made according to the calculated results with the emPirical formula. Based on the analysis of the structure and ProPerties of the roof and floor rock strata of the coal seam in this working face,an engineering geological model was established and then verified by using FLAC3D numerical simulation method. The height of the water flowing fractured zone which was obtained with three research methods was basically identical:the actually measured result was 24. 2 m,the result obtained with the emPirical formulae was 26. 7 m and the result obtained by numerical simulation was 25. 0 m. These research results Provided an imPortant reference for the reasonable retaining of the waterProof coal Pillar after the mining uPPer limit of this coal face was increased.
Keywords：height of water flowing fractured zonenumerical simulationborehole imagingemPirical formula
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 44-47 )