为提高煤炭采出率和生产效率,消除大面积悬顶对安全生产的隐患,研制ZX7000/17/30型履带行走式液压支架,对支巷工作空间的顶板进行临时加强支护,介绍了支架支护、行走、控制系统等关键技术的实现。利用FLAC3D软件建立三维短壁工作面数值模型,分析行走支架的支护作用对短壁工作面顶板及煤柱稳定性的影响。分析结果表明:采用行走支架支护工作面顶板后,联络巷保护煤柱的垂直应力下降40%,煤柱塑性区范围减小,采硐间煤柱垂直应力下降45%,采硐间煤柱宽度可从1.2m减小至0.8m,有效地将顶板切顶线控制在支架后的采空区,增加了煤柱的回采宽度,使万吨掘进尺减少220m左右,工作面月产量可达到6万～8万t,采出率由原来的60%提高到80%以上。

In order to improve the coal mining recovery rate and production efficiency and to eliminate the danger of a suspended roof with a large area, a ZX7000/ 17/30 mode crawler walking type hydraulic powered support in thin seam was researched and developed for a temporary and reinforced support of the roof above the W orking space of the gateway.The paper introduced the realization of the supporting, walking, control system and other key technology of the powered support.A FLAC3D finite difference program was applied to establish a 3D numerical model of the shortwall mining face and analyze the support function of the powered walking support af fected to the roof of the shortwall mining face and coal pillar stability.The analysis results showed that when the powered walking support applied to support the roof of t he coal mining face, the vertical stress of the protective coal pillar in the connection gateway was reduced by 40%，the range of the coal pillar plastic zone was reduce d, the vertical stress of the coal pillar between the mining face and gateway was reduced by 45%, the width of coal pillar between the mining face and gateway was red uced from 1.2 m to 0.8 m, the roof falling line could be effectively controlled in the goaf behind the coal mining face, the mining scope of coal pillar could be enlarged, th e gateway driving length per 10 000 t coal could be reduced about 220 m, the month production value of the coal miming face could be about 60 00080 000 t and the Co al mining recovery rate was improved from previous 60% to over 80%.

太原市科学技术创新资助项目(11014915)；