工作面支承压力峰值计算方法研究

Study on Calculation Formula of Abutment Pressure Peak Value of Face

为了确定区段煤柱尺寸和预防动力灾害事故(瓦斯事故、冲击地压、底板突水等),对支承压力分布规律进行研究。采用理论分析、数理统计研究方法,研究支承压力峰值大小,提出支承压力峰值大小的计算公式。以山西省内30个煤矿144个地应力测试数据为基础,进行支承压力峰值系数计算,得出峰值系数为2.88~5.06,符合国内学者的共识,支承压力峰值是3~5倍的上覆岩重,进一步验证了支承压力峰值的计算公式的合理性。

In order to determine the coal pillar size and the prevention of accidents(gas accident, rock burst, water inrush, etc.),study the abutment pressure distribution by means of theoretical analysis,mathematical statistics,the research of abutment pressure peak value, the calculation formula of the size of the peak value of abutment pressure. In Shanxi 30 coal mining area 144 in-situ test data as the basis, the calculation of peak value of abutment pressure coefficient, the peak value of coefficient of2.88~5.06, consistent with domestic scholars, the peak abutment pressure is 3~5 times the weight of the overlying rock, further verify the rationality of the proposed formula of abutment pressure peak value.