大采高综采工作面压架原因分析及防治

Cause Analysis and Prevention and Treatment of Hydraulic Support Crushing of Large Mining Height Fully Mechanized Face

针对某矿12403大采高综采工作面出现的压架事故,通过矿压理论分析了工作面压架前后支架初撑力、循环末阻力、安全阀开启率的变化情况,同时利用工程力学基本原理,分析了液压支架的掩护梁受力情况,得到压架事故主要有以下3方面的原因:工作面回采速度、支架安全阀的设定、工作面的回采高度与支架掩护梁的剪切力,为今后大采高工作面液压支架的选型提供了科学依据。在今后要根据地质条件更加合理地进行液压支架选型,为防止压架事故的发生,在工作面回采过程中要加强对回采工作面矿压及水文地质数据的观测等。

Aiming at the accident of hydraulic support crushing in 12403 large height mining face of a coal mine, the change situations of the initial support force, the resistance at last phase of cycle and the safety valve opening rate are analyzed by mine pressure theory before and after working face the support crushing. At the same time engineering mechanics principle are utilized, analyzes the force condition of hydraulic support caving shield, obtains that there are three reasons of support crushing accident, which are the mining speed of working face, the setting of support safety valve, mining height of working face, shearing force of support caving shield. It provides the scientific basis for the model selection of large height mining face hydraulic support. In the future, according to the geological conditions carries out select model of hydraulic support and prevent the crushing support accident. Strengthens the ob- servation of mine pressure and hydrogeological data of working face in the process of mining face.