本文针对三道沟煤矿大采高工作面在来压期间顶板破碎、架间漏矸、煤壁片帮、端部冒顶等一系列安全问题，以三道沟煤矿八盘区85205大采高工作面为研究对象，采用文献调查、理论分析、FLAC-3D数值计算、物理试验与现场实测等方法，深入分析了85205大采高工作面5-2煤层开采时矿压显现规律与煤壁片帮控制技术。 首先，通过分析采场地质条件，理论计算得出基本顶初次来压步距为82.94~109.72m，周期来压步距为12.69~15.88m；进一步对煤壁支承压力进行分析，将煤壁变形发展分为弹性变形、塑性破坏、稳定三个阶段。其次，运用数值模拟方法，模拟计算工作面推进过程中煤壁支承压力分布及覆岩结构破坏状态；计算表明来压期间，煤壁支承压力由来压之前的7.5MPa增大到14MPa，位于煤壁前方约6m，煤壁由原来的弹性状态转化为塑性状态，煤壁开始发生塑性破坏，此时煤壁片帮的可能性增大。然后，通过对工作面矿压规律和煤壁片帮的现场监测得出工作面超前支承压力的影响范围为0~72m之间，而在0~30m之间为支承压力的主要影响范围，峰值压力位于工作面前方煤壁11m处，峰值压力达到15Mpa；煤壁片帮主要发生在工作面中部及两顺槽采帮侧，且回风顺槽超前段压力较大，尤其是联巷地段，煤壁响声频繁。通过对煤壁片帮力学机理展开分析，得出了煤层与其上岩层交界面处0.578倍开采高度为容易发生片帮区域。根据煤体强度实验数据分析确定了85205大采高工作面煤壁属III类不稳定煤壁。最后结合工作面情况综合分析，提出设备检修期间防片帮的“六必须”管理技术措施和来压期间提高支架初撑力、打设防护网及动态全方位监测等综合防治方法。 研究成果对三道沟煤矿工作面片帮控制治理及安全开采具有一定参考应用价值。

Aiming at a series of safety problems such as roof breaking, gangue leaking between supports, coal wall and end roof falling during weighting period in Sandaogou Coal Mine, taking 85205 high mining face in Bapan District of Sandaogou Coal Mine as the research object, this paper makes a thorough analysis of 5-2 large mining face in 85205 high mining face by means of literature investigation, theoretical analysis, FLAC-3D numerical calculation, physical test and field measurement, etc. The law of strata pressure appearance and the control technology of coal wall slice in coal seam mining. Firstly, by analyzing the geological conditions of the stope, the first weighting step of the basic roof is 82.94~109.72 m, and the periodic weighting step is 12.69~15.88 M. Further, the support pressure of the coal wall is analyzed, and the development of the deformation of the coal wall is divided into three stages: elastic deformation, plastic failure and stability. Secondly, numerical simulation method is used to simulate and calculate the distribution of abutment pressure of coal wall and the failure state of overburden structure during the advancing process of working face. The calculation shows that during the weighting period, the abutment pressure of coal wall increases from 7.5 MPa before weighting to 14 MPa, which is about 6 m in front of the coal wall. The coal wall changes from elastic state to plastic state, and the plastic failure of coal wall begins to occur. Enhanced capacity. Then, the influence range of the advance abutment pressure of the working face is 0~72m and 0~30m is the main influence range of the abutment pressure. The peak pressure is 11 m above the working face, and the peak pressure is 15 Mpa. The coal wall mainly occurs in the middle of the working face and on the side of the two parallel grooves, and the return air is along the groove. The pressure in advance section is larger, especially in the joint roadway section, the sound of coal wall is frequent. Based on the analysis of mechanics mechanism of coal wall, it is concluded that the mining height of 0.578 times at the interface between coal seam and its upper strata is the area prone to occurrence of slice. Based on the analysis of the experimental data of coal strength, it is determined that the coal wall of 85205 high mining face belongs to class III unstable coal wall. Finally, combined with the comprehensive analysis of the working face situation, the "six necessities" management technical measures of the sheet-proof Gang during equipment maintenance and the comprehensive prevention and control methods such as improving the initial support force, setting up protective net and dynamic omni-directional monitoring during weighting period are put forward. The research results have certain reference and application value for the control and control of face slope and safe mining in Sandaogou Coal Mine.