Based on the transmitting theory of "smoke ring effect", the transient electromagnetism technique was used in coal mines to detect abnormal areas of aquiferous structures in both roofs and floors of coal sea...Based on the transmitting theory of "smoke ring effect", the transient electromagnetism technique was used in coal mines to detect abnormal areas of aquiferous structures in both roofs and floors of coal seams and in front of excavated roadways. Survey devices, working methods and techniques as well as data processing and interpretation are discussed systematically. In addition, the direction of mini-wireframe emission electromagnetic wave of the full space transient electromagnetism technique was verified by an underground borehole for water detection and drainage. The result indicates that this technique can detect both horizontal and vertical development rules of abnormal water bodies to a certain depth below the floor of coal seams and can also detect the abnormal, low resistance water bodies within a certain distance of roofs. Furthermore, it can detect such abnormal bodies in ahead of the excavated roadway front. Limited by the underground environment, the full space transient electromagnetism technique can detect to a depth of only 120 m or so.展开更多
Realized new break-through on the basis of existing security management theory, tentatively and creatively carried out ＂realizing management theory of mine security production＂ and proposed ＂bridge＂ mode of realiz...Realized new break-through on the basis of existing security management theory, tentatively and creatively carried out ＂realizing management theory of mine security production＂ and proposed ＂bridge＂ mode of realizing green management theory. Green management theory has an integrated system structure. The green management system of mine security production includes three parts, the foundation of green system, the supervision system of green system operation and the safeguard system of green system. The key of ＂bridge＂ mode is to analyze the existing insecurity factors in the process of security production and establish corresponding regulations.展开更多
文摘Based on the transmitting theory of "smoke ring effect", the transient electromagnetism technique was used in coal mines to detect abnormal areas of aquiferous structures in both roofs and floors of coal seams and in front of excavated roadways. Survey devices, working methods and techniques as well as data processing and interpretation are discussed systematically. In addition, the direction of mini-wireframe emission electromagnetic wave of the full space transient electromagnetism technique was verified by an underground borehole for water detection and drainage. The result indicates that this technique can detect both horizontal and vertical development rules of abnormal water bodies to a certain depth below the floor of coal seams and can also detect the abnormal, low resistance water bodies within a certain distance of roofs. Furthermore, it can detect such abnormal bodies in ahead of the excavated roadway front. Limited by the underground environment, the full space transient electromagnetism technique can detect to a depth of only 120 m or so.
文摘Realized new break-through on the basis of existing security management theory, tentatively and creatively carried out ＂realizing management theory of mine security production＂ and proposed ＂bridge＂ mode of realizing green management theory. Green management theory has an integrated system structure. The green management system of mine security production includes three parts, the foundation of green system, the supervision system of green system operation and the safeguard system of green system. The key of ＂bridge＂ mode is to analyze the existing insecurity factors in the process of security production and establish corresponding regulations.
