开拓券岔巷道传统给中、腰线方法是:巷道掘至扩大和抬高点时,测量人员只给中、腰线各一组。用中线左右方尺控制两面墙,腰线上、下量控制地脚和券顶。每米中、腰线各变一个数。此法给施工人员造成很大困难。如变换数字施工不宜掌握,中线方尺又不能保证与线垂直,券墙容易出现凹凸形。券顶施工时,一般都是蹬着矸子堆拨券,尽管腰线抬高,矸子堆仍挡住视线,因此施工人员需用肉眼返临时线才能施工。造成误差很大,故券顶经常出现波浪式。 Broke down the traditional bifurcation laneway to the waist line method is: digging tunnel to expand and raise the point, the measurement staff only to the waist line of a group. Left and right side with the midline control of two walls, the waist line, the amount of control of the foot and coupons top. Each meter, the waist line each become a number. This method has caused great difficulties to the construction workers. As the transformation of digital construction should not be mastered, the midline square ruler can not guarantee vertical line, coupon wall prone to convex. Voucher construction, are generally Dengzhe gangue pile dial coupons, although the waist elevation, still blocking the sight of the pile of waste, so construction workers need to return to the construction line with the naked eye. Caused a great error, so the top of the coupons often appear waved.