Water Inrush Mode and Coal Pillar Setting in Near-fault Mining under High-pressurized Water Condition
The most effective way to prevent the damage of fault water is to set up waterproof coal pillars.However,in the past,the calculation of the width of coal pillars mainly used empirical formulas,and the calculation results differed greatly from the actual.The hydraulic model of water inrush at the roof and floor of coal seam under the control of"double pressure"was established by considering mine pressure and pressurized water pressure.Based on considering the nature of the fault,mine pressure and pressurized water pressure,a new method of calculating the width of waterproof coal pillars for large-scale coal mining in positive fault was proposed.The research results were applied in the calculation of the width of waterproof coal pillars in the Wuzhiling branch fault of Hongqi Coal Mine,and numerical simulation was carried out by using FLAC3D software to check the calculation of coal pillar width under the influence of mining.
North China coalfieldnear-fault miningdamage characteristics of surrounding rockwaterproof coal pillar
万方数据
维普
