CAJ | 학술논문

针对深部沿空留巷厚硬顶板大面积悬露及采空侧顶板长悬臂劣化围岩应力环境难题，分析了千米深井厚硬顶板直覆沿空留巷矿压显现特征，提出了该条件下沿空留巷超前工作面采场顶板深孔预裂爆破放顶优化与采空侧顶板结构破断卸压相结合的围岩结构优化控制技术；同时基于理论模型与树脂模型结果，分析了厚硬顶板条件留巷充填墙体上方载荷与采空侧顶板悬臂长度的相互关系，指出利于留巷围岩长期稳定的采空侧顶板悬臂长度不大于12 m。相关研究成果成功应用于平煤集团12矿己14-31010工作面沿空留巷，为同等条件下的实施沿空留巷提供了借鉴。
침대심부연공류항후경정판대면적현로급채공측정판장현비열화위암응력배경난제，분석료천미심정후경정판직복연공류항광압현현특정，제출료해조건하연공류항초전공작면채장정판심공예렬폭파방정우화여채공측정판결구파단사압상결합적위암결구우화공제기술；동시기우이론모형여수지모형결과，분석료후경정판조건류항충전장체상방재하여채공측정판현비장도적상호관계，지출리우류항위암장기은정적채공측정판현비장도불대우12 m。상관연구성과성공응용우평매집단12광기14-31010공작면연공류항，위동등조건하적실시연공류항제공료차감。
The stress environment of surrounding rock in gob-side entry retaining has been deteriorated by mining field large area hanging, longer roof hanging along gob-side under direct thick and hard roof condition. In order to solve the problem, the characteristics of strata behaviour of gob-side entry retain-ing with direct thick and hard roof in over 1 000 m deep coal mine have been analyzed in this paper. The structural optimization technology of overlying strata for gob-side entry retaining with hard roof condi-tion has been proposed, which is compounded by roof caving optimization advanced the working face and pressure relief for hanging roof structure cutting along gob-side using the deep hole presplitting blasting. Simultaneously, the relationship between the length of roof hanging along gob-side and the strength acted on filling wall has been obtained, and the paper has pointed out the reasonable length of roof hanging along gob-side for long-term stability of the surrounding rock in gob-side entry retaining is under the condition of no more than 12 m. The related research results have been successfully applied in gob-side entry retaining of 14-31010 working face in Pingdingshan Twelve coal mine, and have pro-vided reference to the implementation of gob-side entry under the same conditions.