煤矿排矸场灾害效应以及综合勘测研究

Study on Disaster Effect and Comprehensive Survey of Gangue Field

排矸场是煤矿废弃物煤矸石的堆放场所,排矸场堆积体中因存在含硫矿物常常会引发自燃,产生环境污染的同时,也存在次生地质灾害的危险。该文通过综合分析,对排矸场自燃与边坡滑移、坡面水力侵蚀之间的链生关系及其灾害效应进行了论述。结合实际工程案例提出了三阶段排矸场异常区综合勘测确定法。排矸场自燃与边坡滑移和坡面水力侵蚀之间存在灾害互促的链生演化关系。排矸场自燃综合勘测方法是结合初步划定、浅表部验证以及深部划定来划分自燃区的三阶段勘查方法,可对排矸场自燃区进行高效科学的划分,从而有效的节约后续自燃区的治理成本。

Gangue field is an accumulation of coal gangue from coal mines,which often causes spontaneous combustion within the accumulation due to its containing sulfur containing minerals,resulting in environmental pollution and the risk of secondary geological disasters.Based on theoretical analysis,we discusse the chain relationship and disaster effects between spontaneous combustion,slope sliding,and slope hydraulic erosion in gangue field.Combining with practical engineering cases,three step comprehensive survey method for the division of high temperature abnormal areas of spontaneous combustion in gangue field is proposed.The tensile cracks caused by the sliding of the waste dump slope and the exposed waste rock caused by the hydraulic erosion of the slope surface have a combustion-supporting effect on the spontaneous combustion of the gangue field.At the same time,the spontaneous combustion of the gangue field will increase the internal voids in the accumulated body,resulting in a decrease in the strength of the slope.The spontaneous combustion zone of the gangue field tends to extend from the deep to the shallow to the slope cracking zone and the exposed slope surface of the gangue field.