In this paper, an efficient and suitable testing method for evaluating the safety properties of the BMH bulk safety explosive for sulphide ore mining is presented.

In construction projects, such as mining engineering, communications and transport engineering, hydroelectricity and water conservancy engineering, rock mass slopes exist in bulk.

Coalface of Daizhuang Coalmine, the authors believe that the roof in lower seam will form the "block-bulk-beam" structure easy to fall after the mining of top ultra-close seam.