大倾角煤层工作面伪斜布置支架稳定性分析

 摘 要：大倾角煤层工作面伪斜或倾斜布置，支架防滑、防倒是工作面设备稳定性的主要问题。鉴于此从支架整体角度分析其不下滑条件并根据所得结论阐述改善措施及原由；分别从支架处于升架过程及支撑状态角度分析支架两种状态下的不倾倒条件，给出升架过程中支架重心动态变化及正常工作状态下煤层顶底板、旁侧支架压力大小对支架稳定性的影响条件式，并由此得出两状态下区段运输平巷超前区段回风平巷距离关系式；考虑工作面伪斜布置，为避免移架过程导致支架整体上窜，从工作面平行移架角度，给出区段运输平巷超前回风平巷距离；最后针对煤矿具体条件参数计算上述分析所得三个运输平巷超前回风平巷距离值大小，取其中较大者作为工作面伪斜布置依据，保证工作面支架的稳定。

Support stability analysis of oblique arrangement in inclined seam coal face

Abstract: In large dip angle oblique or tilted arrangement mining face, the anti-slip and anti-collapse question of hydraulic support is a key to mine successfully. From the overall perspective to analyze the problem of the hydraulic supports downslide, propose improvement measures and the reason; from the adaptability viewpoint of the face conditions for the supports, to analyze the dumping problem in the process of supports rising; from the supports in normal working state, to determine the conditions of the hydraulic supports no dumping; from the viewpoint on supports parallel shifting when the working face oblique arrangement, given the advanced distance equation of the headentry ahead the tailentry. Meanwhile, given to the oblique arrangement in the working face, avoiding to bracket leap, it is suggested parallel shifting in the working face and calculated the advanced distance equation of the headentry ahead the tailentry; finally, to calculate the measurement of the three advanced distance based on the concrete parameter and conditions in the mining, selecting the comparatively large to arrange the working face thus to ensure the stability if working face bracket.