This paper suggests mixing inclined long wall with vertical long wall at the slowly inclined seam 's comprehensive mining coal face and mining with rotating the coal face so as to increase the advancing length of the coal face .

本文提出了在缓倾斜 煤层综采工作面采用倾斜长壁与 走向长壁混合布置，工作 面旋转开采，加大了工作面的推进长度。

The experimental result of welding vertical fillet joint at every position shows that the automatic seam tracking system is steady and the seam tracking precision is satisfied with the welding request of vertical fillet joint .

通过对各个位置的 垂直角 焊缝进行焊接跟踪实验，结果表明，系统工作稳定，跟踪精度满足垂直角焊缝的焊接要求。

The Selection of Vertical Distance Z between Roadway and Its Upper Coal Seam

巷道与上部 煤层间 垂距Z的选择

Cracks are mainly parallel planes the vertical dimension of joint and inclined seam to seam cracks can make local destruction of mudstone caprock .

裂缝主要有平行层面 缝、 垂直层而缝与斜向 缝，裂缝可使泥质岩盖层局部遭到破坏。

Sewn with close vertical stitches drawing two edges together with each stitch passing over the seam formed by the edges .

平式缝接的把两个边拉在一起用 垂直而细密的针脚缝接的，缝纫时每一针都经过两道边形成的 缝 口

Collateral DSP is used as the central controller to produce control signal which drives the horizontal and vertical step motor of the welding torch in order to realize real-time automatic seam tracking of the welding torch .

系统中采用DSP作为核心控制器产生控制信号，驱动焊枪横向步进电机和 纵向步进电机动作，实现焊接机器人焊枪对 焊缝的实时自动跟踪。

Design and Working Practice of Vertical Face Intersection in Gently Inclined Seam

缓倾斜 煤层 立面交岔点设计与施工

Numerical Simulation of Vertical Well for Low-permeability Coal Seam Gas Reservoirs

低渗透 煤层气藏 直井开采数值模拟研究