平朔井工三矿区段煤柱宽度优化研究

区段煤柱的留设宽度是影响回采巷道围岩稳定性的重要因素，平朔井工三矿工作面区段煤柱宽度一直采用经验值20m，为优化区段煤柱宽度，提高资源采出率，采用现场实测、理论计算和数值模拟方法对平朔井工三矿合理区段煤柱宽度进行了研究。煤柱应力实测表明：井工三矿9104与9105工作面间20m煤柱宽度有一定的富裕量，根据极限平衡理论计算与数值模拟结果，平朔井工三矿区段煤柱合理宽度应大于12m。

Study on Width Optimization of Sectional Coal Pillar in Pingshuo No. 3 Underground Mine

The width of the sectional coal pillar would be an important factor affected to the surrounding stability of the mining gateway.The width of the sectional coal pillar in coal mining face of Pingshuo No.3 Underground Mine is an experienced value of 20 m.In order to optimize the width of the sectional coal pillar and to improve the resources recovery rate,a site measurement,theoretical calculation and numerical simulation method were applied to study the width of the rational sectional coal pillar in Pingshuo No.3 Underground Mine.The stress measurement of the coal pillars showed that the 20 m width coal pillar between No.9104 coal mining face and No.9105 coal mining face in No.3 Underground Mine could have certain surplus.According to the ultimate balanced theoretical calculation and the numerical simulation results,the rational width of the sectional coal pillar in Pingshuo No.3 Underground Mine should be over 12 m.