孤岛工作面岩层地应力分布及顶板垮落规律分析

Analysis of in-situ stress distribution of rock strata and caving Law of roof and floor in isolated working face

为了孤岛工作面的安全回采和支护方案的设计,以许厂煤矿4303孤岛工作面为研究对象,在孤岛工作面工程地质条件的基础上,对孤岛工作面岩层力学特性及渗透性进行了测定,并通过应力解除法获得岩层地应力大小。研究结果得到了孤岛工作面地层最大最小主应力的分布规律以及地层应力场的屈服状态,并最终确定了孤岛工作面顶板的垮落规律。

In order to design the safe mining and support scheme of the isolated island working face,taking the 4303 isolated island working face of Xuchang Coal Mine as the research object,and on the basis of the engineering geological conditions of the isolated island working face,the mechanical properties and permeability of the rock formation in the isolated island working face were measured,and obtained the in-situ stress of the rock stratum by the stress relief method.The research results obtained the distribution law of the maximum and minimum principal stress of the stratum and the yield state of the stratum stress field at the island working face,and finally determined the caving law of the roof of the island working face.