Study on support pressure and goaf stress distribution law of deep well paste filling mining
With the increase of coal mining intensity,the overlying rock movement in the mining area leads to the frequent occurrence of mine disasters.As an important method to obstruct the overlying rock movement,it is crucial to clarify the influence of paste filling on the overlying rock movement law of working face mining for mine safety production.To clarify the filling effect of the paste,relevant in-formation such as advanced support pressure,lateral support pressure,and paste stress were obtained by installing a stress gauge.The monitoring results show that:the disturbance of the advanced support pressure can be divided into two stages.When advancing the work-ing face,the coal body outside the lateral 22 m is basically not affected by the lateral support pressure;after deepening the goaf,the range of influence of lateral support pressure is about 20 m.The stress changes of the paste can be roughly divided into two stages:rapid growth stage and stable growth stage,the initial contact between the roof and floor in the goaf leads to a rapid increase in stress,and when the roof movement ends,the paste stress remains stable.
paste fillingadvanced support presurelateral support pressurepaste stress
万方数据
维普
