基于采动应力监测的深部动力灾害预测技术

随着浅部煤炭资源的日益枯竭,煤炭开采逐步向深部发展。深部煤岩体所处的"三高一扰动"的特殊地质力学环境,导致用传统的围岩支撑压力分布曲线确定应力分布形态必然会出现较大偏差。本文通过对采动应力的理论分析,得出垂向采动应力的异常是引起工作面前方煤岩体采动灾害的重要原因。设计了采动应力监测方法,利用采动集中应力梯度实现了不同测点应力传感器监测值的可比性,并提出了采动应力监测范围应尽可能大和测点布置方案。

Deep dynamic disaster prediction technologies based on mining-induced stress monitoring

With the shallow coal resources are exhausted for the time being,coal mining is gradually developing to the deep.Deep coal-rock mass is in special geological mechanics environment with three "high" and one " disturbance",lead to stress distribution by traditional surrounding rock supporting pressure distribution curve will appear larger deviation inevitably.Based on theory analysis of mining-induced stress,this paper obtained that the important cause of the front of working face coal-rock mass mining disaster was the abnormal vertical mining-induced stress.Designed the method of mining stress monitoring and made mining concentration stress gradient to achieve different stress sensor monitoring value comparability.Proposed the measuring point arrangement and the mining stress monitoring range should be as large as possible.