区段煤柱合理宽度的确定是保证大采高工作面安全开采的关键。本文以亭南煤矿二盘区大采高工作面及区段煤柱为研究背景，综合应用现场观测、理论分析、数值模拟及相似材料模拟等方法对二盘区区段煤柱进行了系统的研究，主要研究内容如下： 首先，在分析矿区基本地质条件的基础上，应用现场应力观测的方法对该矿二盘区目前所留设的30m区段煤柱的破坏规律进行了研究，研究表明，当煤柱一侧位于采空区时，靠近采空区侧煤柱边缘的破坏区域宽度约为3m，上位岩层低应力区域宽度约为18m，当煤柱两侧均位于采空区内时，煤柱中部至少存在宽度为15m的稳定区域；巷道监测结果表明目前所留设的30m区段煤柱尺寸偏大，可通过优化减小区段煤柱尺寸；通过对现场观测数据分析，确定了区段煤柱尺寸的优化范围为5.2~13m。其次，从提高煤炭采出率、巷道支护及水体下安全开采的角度分析论证了窄煤柱沿空掘巷的合理性；在分析窄煤柱沿空掘巷原理的基础上，应用极限平衡理论分析计算得出区段煤柱的极限宽度为6.12m。在上述研究的基础上，应用数值模拟的方法模拟分析了采空区侧向支撑应力分布规律，沿空掘巷后及二次采动期间宽度为4m、5m、6m、7m、8m、9m、10m、11m、12m时煤柱的应力演化规律、弹塑性区域变化规律和巷道变形规律，确定了区段煤柱的优化尺寸为10m。最后，应用物理相似模拟实验，从覆岩移动破坏演化规律与煤柱承压分布规律的相关性等方面验证了采用10m宽区段煤柱的合理性、可靠性。 本文研究成果为亭南煤矿二盘区区段煤柱合理尺寸的确定提供了理论基础，并对类似开采条件下区段煤柱的留设提供参考。

Determination of reasonable coal pillar width is key for ensuring safety production of large mining height face. Taking the determination of large mining height face and coal pillar in the second panel of Ting Nan Coal Mine as the engineering background, Theoretical calculation, field measurement, numerical simulation and similar materials simulation had been used to analysis the coal pillar systematically. It’s mostly contents as follows: Firstly, based on analyzing the basic geologic conditions, the failure regularity of current 30m coal pillar under the effect of mining was systematically studied by using the method of field stress monitoring, studies have shown that when one side of the coal pillar in goaf, about 3 m in width of fractured zone near the goaf was found, and 18m in width of low stress zone was realized; when the whole pillar was located in goaf, more than 15m in width of stability region in the middle of the pillar; the results of gateway detection have shown that the width of current 30m coal pillar is too large, and optimizing the section of coal pillar has certain feasibility. Though field measurement, the section scope of coal pillar initially identified as 5.2~13m. In addition, from the perspective of coal recovery ratio, tunnel support and safety mining under water body, the rationality of cutting along goaf and with thin pillar has been demonstrated; based on analyzing the principle of cutting along goaf and with thin pillar; the limit width of coal pillar was calculated as 6.12m with limit equilibrium theory. And the lateral stress distributions, as well as the pillar stress evolution law, the elastic-plastic region variation, and the roadways deformation law of 9 different coal pillar that width of 4m, 5m, 6m, 7m, 8m, 9m, 10m, 11m, 12m were studied systematically by numerical simulation; the reasonable width of coal pillar in large mining height face was determined as 10m. Finally, though analyzing the correlation between overburden failure evolution and pressure distribution of coal pillar, the reasonableness and reliability was verified by using similar materials simulation. Papers of the research results provide theoretical basis for the large mining height face coal pillar size design in the second panel of Ting Nan Coal Mine, and under similar conditions of coal pillar size design has the certain reference value.