摘要
以千米深井安居煤矿5307工作面为工程背景,通过数值模拟和现场实测研究了超千米埋深切顶成巷无煤柱开采卸压效应及采场应力分布特征,并对工作面压力分布进行了分区。数值模拟结果表明,相对于留煤柱开采,切顶成巷无煤柱开采超前支承压力峰值和应力增高系数均有降低,且越近留巷侧卸压效应越明显,切顶成巷实体煤帮应力峰值较留煤柱开采降低6.7%;现场实测结果表明,切顶成巷无煤柱开采工作面倾向压力分布具有非对称性特征,近切缝侧一定范围内出现明显的卸压区,卸压影响范围15 m,切缝影响区内的支架平均工作阻力较工作面中部降低28%,较未切缝的运输巷侧降低22%。
Based on the engineering background of 5307 panel of Anju Coal Mine with the depth over 1,000 meters,through numerical simulation and field measurement,the pressure relief effect and stope stress distribution characteristics of no-pillar mining by cutting roof in over 1000 km deep mine are studied,and the pressure distribution of panel is divided.Simulation results show that,the peak advance abutment pressure and stress increase coefficient of pillar retaining mining both decrease,the pressure relief effect becomes more obvious when it gets closer to the pillar retaining side,and the peak stress of solid coal side of pillar retaining mining decreases by 6.7%compared with that of pillar retaining mining.The field measurement results show that the inclined pressure distribution of no-pillar mining by roof cutting is asymmetrical.There is an obvious pressure relief zone in a certain range near the cutting side,and the influence range of pressure relief is 15 m.The average working resistance of the support in the cutting affected area is 26%lower than that in the middle of panel,and 17.6%lower than that in the belt entry side with no-cutting.
作者
张磊
李伟东
汪义龙
李永元
杨阳
ZHANG Lei;LI Weidong;WANG Yilong;LI Yongyuan;YANG Yang(Huaneng Coal Technology Research Co.,Ltd.,Beijing 100070,China)
出处
《煤炭工程》
北大核心
2023年第3期94-99,共6页
Coal Engineering
基金
华能集团总部科技项目(HNKJ22-HF129)。
关键词
千米深井
采场应力
沿空留巷
矿山压力
切顶卸压
kilometer deep coal mine
stope stress
gob-side entry retaining
rock pressure
roof cutting pressure relie
