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应用Ansys有限元程序Mechanical模块模拟了重庆某矿2124机巷掘进头附近的断裂破坏区,并与实际突出孔洞进行了对比.研究表明:煤体中形成的断裂破坏区可用煤体断裂破坏强度理论通过数值计算的方法划分出来;煤和瓦斯突出孔洞由煤体中的断裂破坏区演化、发展而来.分析了重庆某矿30多年的突出台帐,得出重庆某矿远离地质构造的煤和瓦斯突出孔洞具有以下特征:孔洞多位于巷道上方,具有“口袋”形状,并向煤层的走向和倾向方向上展布;孔洞的长轴一般为5～15m,在走向的延伸小于5m;该矿产生的突出孔洞是由压性水平构造应力为主的地应力场导致的断裂破坏区演化而来.
The Ansys finite element program Mechanical module was used to simulate the rupture zone near the excavation head of 2124 mechanized roadway in a mine in Chongqing and compared with the actual protruding holes.The results show that the rupture zone of rupture in coal can be calculated by the theory of rupture strength of rupture of coal body Which is divided by numerical methods.Changes of coal and gas outburst evolve from the rupture zone in the coal.The analysis of the prominent ledger of a mine in Chongqing for more than 30 years shows that a certain mine in Chongqing is far away from the geological structure of coal and The gas outburst hole has the following characteristics: the hole is mostly located above the roadway and has a “pocket” shape and is distributed to the direction and direction of the coal seam; the long axis of the hole is generally 5 to 15m and the extension of the direction is less than 5m; The prominent vugs produced by the mine are evolved from the fracture and destruction zones caused by the stress-dominated stress field in the compressive level.